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glib/gio/gfile.c
Benjamin Otte e8254f14fd gfile: Rewrite load_contents() to use realloc() 
GByteArray is limited to 4GB in size and the current code silently
overflows when that happens.

Replace both load_contents() and load_contents_async() implementations
with a version that uses realloc() and gsize to maintain the array.
2024-06-17 13:03:05 +01:00

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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/* GIO - GLib Input, Output and Streaming Library
*
* Copyright (C) 2006-2007 Red Hat, Inc.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
* Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
* Author: Alexander Larsson <alexl@redhat.com>
*/
#include "config.h"
#ifdef __linux__
#include <sys/ioctl.h>
#include <errno.h>
/* See linux.git/fs/btrfs/ioctl.h */
#define BTRFS_IOCTL_MAGIC 0x94
#define BTRFS_IOC_CLONE _IOW(BTRFS_IOCTL_MAGIC, 9, int)
#endif
#ifdef HAVE_SPLICE
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
/*
* We duplicate the following Linux kernel header defines here so we can still
* run at full speed on modern kernels in cases where an old toolchain was used
* to build GLib. This is often done deliberately to allow shipping binaries
* that need to run on a wide range of systems.
*/
#ifndef F_SETPIPE_SZ
#define F_SETPIPE_SZ 1031
#endif
#ifndef F_GETPIPE_SZ
#define F_GETPIPE_SZ 1032
#endif
#endif
#include <string.h>
#include <sys/types.h>
#include "gfile.h"
#include "glib/gstdio.h"
#ifdef G_OS_UNIX
#include "glib-unix.h"
#endif
#include "gvfs.h"
#include "gtask.h"
#include "gfileattribute-priv.h"
#include "gfiledescriptorbased.h"
#include "gpollfilemonitor.h"
#include "gappinfo.h"
#include "gfileinputstream.h"
#include "gfileoutputstream.h"
#include "glocalfileoutputstream.h"
#include "glocalfileiostream.h"
#include "glocalfile.h"
#include "gcancellable.h"
#include "gasyncresult.h"
#include "gioerror.h"
#include "glibintl.h"
/* Linux defines loff_t as a way to simplify the offset types for calls like
* splice() and copy_file_range(). BSD has copy_file_range() but doesn’t define
* loff_t. Abstract that. */
#ifndef HAVE_LOFF_T
typedef off_t loff_t;
#endif
/**
* GFile:
*
* `GFile` is a high level abstraction for manipulating files on a
* virtual file system. `GFile`s are lightweight, immutable objects
* that do no I/O upon creation. It is necessary to understand that
* `GFile` objects do not represent files, merely an identifier for a
* file. All file content I/O is implemented as streaming operations
* (see [class@Gio.InputStream] and [class@Gio.OutputStream]).
*
* To construct a `GFile`, you can use:
*
* - [func@Gio.File.new_for_path] if you have a path.
* - [func@Gio.File.new_for_uri] if you have a URI.
* - [func@Gio.File.new_for_commandline_arg] or
* [func@Gio.File.new_for_commandline_arg_and_cwd] for a command line
* argument.
* - [func@Gio.File.new_tmp] to create a temporary file from a template.
* - [func@Gio.File.new_tmp_async] to asynchronously create a temporary file.
* - [func@Gio.File.new_tmp_dir_async] to asynchronously create a temporary
* directory.
* - [func@Gio.File.parse_name] from a UTF-8 string gotten from
* [method@Gio.File.get_parse_name].
* - [func@Gio.File.new_build_filename] or [func@Gio.File.new_build_filenamev]
* to create a file from path elements.
*
* One way to think of a `GFile` is as an abstraction of a pathname. For
* normal files the system pathname is what is stored internally, but as
* `GFile`s are extensible it could also be something else that corresponds
* to a pathname in a userspace implementation of a filesystem.
*
* `GFile`s make up hierarchies of directories and files that correspond to
* the files on a filesystem. You can move through the file system with
* `GFile` using [method@Gio.File.get_parent] to get an identifier for the
* parent directory, [method@Gio.File.get_child] to get a child within a
* directory, and [method@Gio.File.resolve_relative_path] to resolve a relative
* path between two `GFile`s. There can be multiple hierarchies, so you may not
* end up at the same root if you repeatedly call [method@Gio.File.get_parent]
* on two different files.
*
* All `GFile`s have a basename (get with [method@Gio.File.get_basename]). These
* names are byte strings that are used to identify the file on the filesystem
* (relative to its parent directory) and there is no guarantees that they
* have any particular charset encoding or even make any sense at all. If
* you want to use filenames in a user interface you should use the display
* name that you can get by requesting the
* `G_FILE_ATTRIBUTE_STANDARD_DISPLAY_NAME` attribute with
* [method@Gio.File.query_info]. This is guaranteed to be in UTF-8 and can be
* used in a user interface. But always store the real basename or the `GFile`
* to use to actually access the file, because there is no way to go from a
* display name to the actual name.
*
* Using `GFile` as an identifier has the same weaknesses as using a path
* in that there may be multiple aliases for the same file. For instance,
* hard or soft links may cause two different `GFile`s to refer to the same
* file. Other possible causes for aliases are: case insensitive filesystems,
* short and long names on FAT/NTFS, or bind mounts in Linux. If you want to
* check if two `GFile`s point to the same file you can query for the
* `G_FILE_ATTRIBUTE_ID_FILE` attribute. Note that `GFile` does some trivial
* canonicalization of pathnames passed in, so that trivial differences in
* the path string used at creation (duplicated slashes, slash at end of
* path, `.` or `..` path segments, etc) does not create different `GFile`s.
*
* Many `GFile` operations have both synchronous and asynchronous versions
* to suit your application. Asynchronous versions of synchronous functions
* simply have `_async()` appended to their function names. The asynchronous
* I/O functions call a [callback@Gio.AsyncReadyCallback] which is then used to
* finalize the operation, producing a [iface@Gio.AsyncResult] which is then
* passed to the function’s matching `_finish()` operation.
*
* It is highly recommended to use asynchronous calls when running within a
* shared main loop, such as in the main thread of an application. This avoids
* I/O operations blocking other sources on the main loop from being dispatched.
* Synchronous I/O operations should be performed from worker threads. See the
* [introduction to asynchronous programming section](overview.html#asynchronous-programming)
* for more.
*
* Some `GFile` operations almost always take a noticeable amount of time, and
* so do not have synchronous analogs. Notable cases include:
*
* - [method@Gio.File.mount_mountable] to mount a mountable file.
* - [method@Gio.File.unmount_mountable_with_operation] to unmount a mountable
* file.
* - [method@Gio.File.eject_mountable_with_operation] to eject a mountable file.
*
* ## Entity Tags
*
* One notable feature of `GFile`s are entity tags, or ‘etags’ for
* short. Entity tags are somewhat like a more abstract version of the
* traditional mtime, and can be used to quickly determine if the file
* has been modified from the version on the file system. See the
* HTTP 1.1
* [specification](http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html)
* for HTTP `ETag` headers, which are a very similar concept.
*/
static void g_file_real_query_info_async (GFile *file,
const char *attributes,
GFileQueryInfoFlags flags,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data);
static GFileInfo * g_file_real_query_info_finish (GFile *file,
GAsyncResult *res,
GError **error);
static void g_file_real_query_filesystem_info_async (GFile *file,
const char *attributes,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data);
static GFileInfo * g_file_real_query_filesystem_info_finish (GFile *file,
GAsyncResult *res,
GError **error);
static void g_file_real_enumerate_children_async (GFile *file,
const char *attributes,
GFileQueryInfoFlags flags,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data);
static GFileEnumerator * g_file_real_enumerate_children_finish (GFile *file,
GAsyncResult *res,
GError **error);
static void g_file_real_read_async (GFile *file,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data);
static GFileInputStream * g_file_real_read_finish (GFile *file,
GAsyncResult *res,
GError **error);
static void g_file_real_append_to_async (GFile *file,
GFileCreateFlags flags,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data);
static GFileOutputStream *g_file_real_append_to_finish (GFile *file,
GAsyncResult *res,
GError **error);
static void g_file_real_create_async (GFile *file,
GFileCreateFlags flags,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data);
static GFileOutputStream *g_file_real_create_finish (GFile *file,
GAsyncResult *res,
GError **error);
static void g_file_real_replace_async (GFile *file,
const char *etag,
gboolean make_backup,
GFileCreateFlags flags,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data);
static GFileOutputStream *g_file_real_replace_finish (GFile *file,
GAsyncResult *res,
GError **error);
static void g_file_real_delete_async (GFile *file,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data);
static gboolean g_file_real_delete_finish (GFile *file,
GAsyncResult *res,
GError **error);
static void g_file_real_trash_async (GFile *file,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data);
static gboolean g_file_real_trash_finish (GFile *file,
GAsyncResult *res,
GError **error);
static void g_file_real_move_async (GFile *source,
GFile *destination,
GFileCopyFlags flags,
int io_priority,
GCancellable *cancellable,
GFileProgressCallback progress_callback,
gpointer progress_callback_data,
GAsyncReadyCallback callback,
gpointer user_data);
static gboolean g_file_real_move_finish (GFile *file,
GAsyncResult *result,
GError **error);
static void g_file_real_make_directory_async (GFile *file,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data);
static gboolean g_file_real_make_directory_finish (GFile *file,
GAsyncResult *res,
GError **error);
static void g_file_real_make_symbolic_link_async (GFile *file,
const char *symlink_value,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data);
static gboolean g_file_real_make_symbolic_link_finish (GFile *file,
GAsyncResult *result,
GError **error);
static void g_file_real_open_readwrite_async (GFile *file,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data);
static GFileIOStream * g_file_real_open_readwrite_finish (GFile *file,
GAsyncResult *res,
GError **error);
static void g_file_real_create_readwrite_async (GFile *file,
GFileCreateFlags flags,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data);
static GFileIOStream * g_file_real_create_readwrite_finish (GFile *file,
GAsyncResult *res,
GError **error);
static void g_file_real_replace_readwrite_async (GFile *file,
const char *etag,
gboolean make_backup,
GFileCreateFlags flags,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data);
static GFileIOStream * g_file_real_replace_readwrite_finish (GFile *file,
GAsyncResult *res,
GError **error);
static gboolean g_file_real_set_attributes_from_info (GFile *file,
GFileInfo *info,
GFileQueryInfoFlags flags,
GCancellable *cancellable,
GError **error);
static void g_file_real_set_display_name_async (GFile *file,
const char *display_name,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data);
static GFile * g_file_real_set_display_name_finish (GFile *file,
GAsyncResult *res,
GError **error);
static void g_file_real_set_attributes_async (GFile *file,
GFileInfo *info,
GFileQueryInfoFlags flags,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data);
static gboolean g_file_real_set_attributes_finish (GFile *file,
GAsyncResult *res,
GFileInfo **info,
GError **error);
static void g_file_real_find_enclosing_mount_async (GFile *file,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data);
static GMount * g_file_real_find_enclosing_mount_finish (GFile *file,
GAsyncResult *res,
GError **error);
static void g_file_real_copy_async (GFile *source,
GFile *destination,
GFileCopyFlags flags,
int io_priority,
GCancellable *cancellable,
GFileProgressCallback progress_callback,
gpointer progress_callback_data,
GAsyncReadyCallback callback,
gpointer user_data);
static gboolean g_file_real_copy_finish (GFile *file,
GAsyncResult *res,
GError **error);
static gboolean g_file_real_measure_disk_usage (GFile *file,
GFileMeasureFlags flags,
GCancellable *cancellable,
GFileMeasureProgressCallback progress_callback,
gpointer progress_data,
guint64 *disk_usage,
guint64 *num_dirs,
guint64 *num_files,
GError **error);
static void g_file_real_measure_disk_usage_async (GFile *file,
GFileMeasureFlags flags,
gint io_priority,
GCancellable *cancellable,
GFileMeasureProgressCallback progress_callback,
gpointer progress_data,
GAsyncReadyCallback callback,
gpointer user_data);
static gboolean g_file_real_measure_disk_usage_finish (GFile *file,
GAsyncResult *result,
guint64 *disk_usage,
guint64 *num_dirs,
guint64 *num_files,
GError **error);
typedef GFileIface GFileInterface;
G_DEFINE_INTERFACE (GFile, g_file, G_TYPE_OBJECT)
static void
g_file_default_init (GFileIface *iface)
{
iface->enumerate_children_async = g_file_real_enumerate_children_async;
iface->enumerate_children_finish = g_file_real_enumerate_children_finish;
iface->set_display_name_async = g_file_real_set_display_name_async;
iface->set_display_name_finish = g_file_real_set_display_name_finish;
iface->query_info_async = g_file_real_query_info_async;
iface->query_info_finish = g_file_real_query_info_finish;
iface->query_filesystem_info_async = g_file_real_query_filesystem_info_async;
iface->query_filesystem_info_finish = g_file_real_query_filesystem_info_finish;
iface->set_attributes_async = g_file_real_set_attributes_async;
iface->set_attributes_finish = g_file_real_set_attributes_finish;
iface->read_async = g_file_real_read_async;
iface->read_finish = g_file_real_read_finish;
iface->append_to_async = g_file_real_append_to_async;
iface->append_to_finish = g_file_real_append_to_finish;
iface->create_async = g_file_real_create_async;
iface->create_finish = g_file_real_create_finish;
iface->replace_async = g_file_real_replace_async;
iface->replace_finish = g_file_real_replace_finish;
iface->delete_file_async = g_file_real_delete_async;
iface->delete_file_finish = g_file_real_delete_finish;
iface->trash_async = g_file_real_trash_async;
iface->trash_finish = g_file_real_trash_finish;
iface->move_async = g_file_real_move_async;
iface->move_finish = g_file_real_move_finish;
iface->make_directory_async = g_file_real_make_directory_async;
iface->make_directory_finish = g_file_real_make_directory_finish;
iface->make_symbolic_link_async = g_file_real_make_symbolic_link_async;
iface->make_symbolic_link_finish = g_file_real_make_symbolic_link_finish;
iface->open_readwrite_async = g_file_real_open_readwrite_async;
iface->open_readwrite_finish = g_file_real_open_readwrite_finish;
iface->create_readwrite_async = g_file_real_create_readwrite_async;
iface->create_readwrite_finish = g_file_real_create_readwrite_finish;
iface->replace_readwrite_async = g_file_real_replace_readwrite_async;
iface->replace_readwrite_finish = g_file_real_replace_readwrite_finish;
iface->find_enclosing_mount_async = g_file_real_find_enclosing_mount_async;
iface->find_enclosing_mount_finish = g_file_real_find_enclosing_mount_finish;
iface->set_attributes_from_info = g_file_real_set_attributes_from_info;
iface->copy_async = g_file_real_copy_async;
iface->copy_finish = g_file_real_copy_finish;
iface->measure_disk_usage = g_file_real_measure_disk_usage;
iface->measure_disk_usage_async = g_file_real_measure_disk_usage_async;
iface->measure_disk_usage_finish = g_file_real_measure_disk_usage_finish;
}
/**
* g_file_is_native:
* @file: input #GFile
*
* Checks to see if a file is native to the platform.
*
* A native file is one expressed in the platform-native filename format,
* e.g. "C:\Windows" or "/usr/bin/". This does not mean the file is local,
* as it might be on a locally mounted remote filesystem.
*
* On some systems non-native files may be available using the native
* filesystem via a userspace filesystem (FUSE), in these cases this call
* will return %FALSE, but g_file_get_path() will still return a native path.
*
* This call does no blocking I/O.
*
* Returns: %TRUE if @file is native
*/
gboolean
g_file_is_native (GFile *file)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), FALSE);
iface = G_FILE_GET_IFACE (file);
return (* iface->is_native) (file);
}
/**
* g_file_has_uri_scheme:
* @file: input #GFile
* @uri_scheme: a string containing a URI scheme
*
* Checks to see if a #GFile has a given URI scheme.
*
* This call does no blocking I/O.
*
* Returns: %TRUE if #GFile's backend supports the
* given URI scheme, %FALSE if URI scheme is %NULL,
* not supported, or #GFile is invalid.
*/
gboolean
g_file_has_uri_scheme (GFile *file,
const char *uri_scheme)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), FALSE);
g_return_val_if_fail (uri_scheme != NULL, FALSE);
iface = G_FILE_GET_IFACE (file);
return (* iface->has_uri_scheme) (file, uri_scheme);
}
/**
* g_file_get_uri_scheme:
* @file: input #GFile
*
* Gets the URI scheme for a #GFile.
* RFC 3986 decodes the scheme as:
* |[
* URI = scheme ":" hier-part [ "?" query ] [ "#" fragment ]
* ]|
* Common schemes include "file", "http", "ftp", etc.
*
* The scheme can be different from the one used to construct the #GFile,
* in that it might be replaced with one that is logically equivalent to the #GFile.
*
* This call does no blocking I/O.
*
* Returns: (nullable): a string containing the URI scheme for the given
* #GFile or %NULL if the #GFile was constructed with an invalid URI. The
* returned string should be freed with g_free() when no longer needed.
*/
char *
g_file_get_uri_scheme (GFile *file)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), NULL);
iface = G_FILE_GET_IFACE (file);
return (* iface->get_uri_scheme) (file);
}
/**
* g_file_get_basename: (virtual get_basename)
* @file: input #GFile
*
* Gets the base name (the last component of the path) for a given #GFile.
*
* If called for the top level of a system (such as the filesystem root
* or a uri like sftp://host/) it will return a single directory separator
* (and on Windows, possibly a drive letter).
*
* The base name is a byte string (not UTF-8). It has no defined encoding
* or rules other than it may not contain zero bytes. If you want to use
* filenames in a user interface you should use the display name that you
* can get by requesting the %G_FILE_ATTRIBUTE_STANDARD_DISPLAY_NAME
* attribute with g_file_query_info().
*
* This call does no blocking I/O.
*
* Returns: (type filename) (nullable): string containing the #GFile's
* base name, or %NULL if given #GFile is invalid. The returned string
* should be freed with g_free() when no longer needed.
*/
char *
g_file_get_basename (GFile *file)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), NULL);
iface = G_FILE_GET_IFACE (file);
return (* iface->get_basename) (file);
}
/**
* g_file_get_path: (virtual get_path)
* @file: input #GFile
*
* Gets the local pathname for #GFile, if one exists. If non-%NULL, this is
* guaranteed to be an absolute, canonical path. It might contain symlinks.
*
* This call does no blocking I/O.
*
* Returns: (type filename) (nullable): string containing the #GFile's path,
* or %NULL if no such path exists. The returned string should be freed
* with g_free() when no longer needed.
*/
char *
g_file_get_path (GFile *file)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), NULL);
iface = G_FILE_GET_IFACE (file);
return (* iface->get_path) (file);
}
static const char *
file_peek_path_generic (GFile *file)
{
const char *path;
static GQuark _file_path_quark = 0;
if (G_UNLIKELY (_file_path_quark) == 0)
_file_path_quark = g_quark_from_static_string ("gio-file-path");
/* We need to be careful about threading, as two threads calling
* g_file_peek_path() on the same file could race: both would see
* (g_object_get_qdata(…) == NULL) to begin with, both would generate and add
* the path, but the second thread to add it would end up freeing the path
* set by the first thread. The first thread would still return the pointer
* to that freed path, though, resulting an a read-after-free. Handle that
* with a compare-and-swap loop. The g_object_*_qdata() functions are atomic. */
while (TRUE)
{
gchar *new_path = NULL;
path = g_object_get_qdata ((GObject*)file, _file_path_quark);
if (path != NULL)
break;
new_path = g_file_get_path (file);
if (new_path == NULL)
return NULL;
/* By passing NULL here, we ensure we never replace existing data: */
if (g_object_replace_qdata ((GObject *) file, _file_path_quark,
NULL, (gpointer) new_path,
(GDestroyNotify) g_free, NULL))
{
path = new_path;
break;
}
else
g_free (new_path);
}
return path;
}
/**
* g_file_peek_path:
* @file: input #GFile
*
* Exactly like g_file_get_path(), but caches the result via
* g_object_set_qdata_full(). This is useful for example in C
* applications which mix `g_file_*` APIs with native ones. It
* also avoids an extra duplicated string when possible, so will be
* generally more efficient.
*
* This call does no blocking I/O.
*
* Returns: (type filename) (nullable): string containing the #GFile's path,
* or %NULL if no such path exists. The returned string is owned by @file.
* Since: 2.56
*/
const char *
g_file_peek_path (GFile *file)
{
if (G_IS_LOCAL_FILE (file))
return _g_local_file_get_filename ((GLocalFile *) file);
return file_peek_path_generic (file);
}
/**
* g_file_get_uri:
* @file: input #GFile
*
* Gets the URI for the @file.
*
* This call does no blocking I/O.
*
* Returns: a string containing the #GFile's URI. If the #GFile was constructed
* with an invalid URI, an invalid URI is returned.
* The returned string should be freed with g_free()
* when no longer needed.
*/
char *
g_file_get_uri (GFile *file)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), NULL);
iface = G_FILE_GET_IFACE (file);
return (* iface->get_uri) (file);
}
/**
* g_file_get_parse_name:
* @file: input #GFile
*
* Gets the parse name of the @file.
* A parse name is a UTF-8 string that describes the
* file such that one can get the #GFile back using
* g_file_parse_name().
*
* This is generally used to show the #GFile as a nice
* full-pathname kind of string in a user interface,
* like in a location entry.
*
* For local files with names that can safely be converted
* to UTF-8 the pathname is used, otherwise the IRI is used
* (a form of URI that allows UTF-8 characters unescaped).
*
* This call does no blocking I/O.
*
* Returns: a string containing the #GFile's parse name.
* The returned string should be freed with g_free()
* when no longer needed.
*/
char *
g_file_get_parse_name (GFile *file)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), NULL);
iface = G_FILE_GET_IFACE (file);
return (* iface->get_parse_name) (file);
}
/**
* g_file_dup:
* @file: input #GFile
*
* Duplicates a #GFile handle. This operation does not duplicate
* the actual file or directory represented by the #GFile; see
* g_file_copy() if attempting to copy a file.
*
* g_file_dup() is useful when a second handle is needed to the same underlying
* file, for use in a separate thread (#GFile is not thread-safe). For use
* within the same thread, use g_object_ref() to increment the existing object’s
* reference count.
*
* This call does no blocking I/O.
*
* Returns: (transfer full): a new #GFile that is a duplicate
* of the given #GFile.
*/
GFile *
g_file_dup (GFile *file)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), NULL);
iface = G_FILE_GET_IFACE (file);
return (* iface->dup) (file);
}
/**
* g_file_hash: (virtual hash)
* @file: (type GFile): #gconstpointer to a #GFile
*
* Creates a hash value for a #GFile.
*
* This call does no blocking I/O.
*
* Returns: 0 if @file is not a valid #GFile, otherwise an
* integer that can be used as hash value for the #GFile.
* This function is intended for easily hashing a #GFile to
* add to a #GHashTable or similar data structure.
*/
guint
g_file_hash (gconstpointer file)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), 0);
iface = G_FILE_GET_IFACE (file);
return (* iface->hash) ((GFile *)file);
}
/**
* g_file_equal:
* @file1: the first #GFile
* @file2: the second #GFile
*
* Checks if the two given #GFiles refer to the same file.
*
* Note that two #GFiles that differ can still refer to the same
* file on the filesystem due to various forms of filename
* aliasing.
*
* This call does no blocking I/O.
*
* Returns: %TRUE if @file1 and @file2 are equal.
*/
gboolean
g_file_equal (GFile *file1,
GFile *file2)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file1), FALSE);
g_return_val_if_fail (G_IS_FILE (file2), FALSE);
if (file1 == file2)
return TRUE;
if (G_TYPE_FROM_INSTANCE (file1) != G_TYPE_FROM_INSTANCE (file2))
return FALSE;
iface = G_FILE_GET_IFACE (file1);
return (* iface->equal) (file1, file2);
}
/**
* g_file_get_parent:
* @file: input #GFile
*
* Gets the parent directory for the @file.
* If the @file represents the root directory of the
* file system, then %NULL will be returned.
*
* This call does no blocking I/O.
*
* Returns: (nullable) (transfer full): a #GFile structure to the
* parent of the given #GFile or %NULL if there is no parent. Free
* the returned object with g_object_unref().
*/
GFile *
g_file_get_parent (GFile *file)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), NULL);
iface = G_FILE_GET_IFACE (file);
return (* iface->get_parent) (file);
}
/**
* g_file_has_parent:
* @file: input #GFile
* @parent: (nullable): the parent to check for, or %NULL
*
* Checks if @file has a parent, and optionally, if it is @parent.
*
* If @parent is %NULL then this function returns %TRUE if @file has any
* parent at all. If @parent is non-%NULL then %TRUE is only returned
* if @file is an immediate child of @parent.
*
* Returns: %TRUE if @file is an immediate child of @parent (or any parent in
* the case that @parent is %NULL).
*
* Since: 2.24
*/
gboolean
g_file_has_parent (GFile *file,
GFile *parent)
{
GFile *actual_parent;
gboolean result;
g_return_val_if_fail (G_IS_FILE (file), FALSE);
g_return_val_if_fail (parent == NULL || G_IS_FILE (parent), FALSE);
actual_parent = g_file_get_parent (file);
if (actual_parent != NULL)
{
if (parent != NULL)
result = g_file_equal (parent, actual_parent);
else
result = TRUE;
g_object_unref (actual_parent);
}
else
result = FALSE;
return result;
}
/**
* g_file_get_child:
* @file: input #GFile
* @name: (type filename): string containing the child's basename
*
* Gets a child of @file with basename equal to @name.
*
* Note that the file with that specific name might not exist, but
* you can still have a #GFile that points to it. You can use this
* for instance to create that file.
*
* This call does no blocking I/O.
*
* Returns: (transfer full): a #GFile to a child specified by @name.
* Free the returned object with g_object_unref().
*/
GFile *
g_file_get_child (GFile *file,
const char *name)
{
g_return_val_if_fail (G_IS_FILE (file), NULL);
g_return_val_if_fail (name != NULL, NULL);
g_return_val_if_fail (!g_path_is_absolute (name), NULL);
return g_file_resolve_relative_path (file, name);
}
/**
* g_file_get_child_for_display_name:
* @file: input #GFile
* @display_name: string to a possible child
* @error: return location for an error
*
* Gets the child of @file for a given @display_name (i.e. a UTF-8
* version of the name). If this function fails, it returns %NULL
* and @error will be set. This is very useful when constructing a
* #GFile for a new file and the user entered the filename in the
* user interface, for instance when you select a directory and
* type a filename in the file selector.
*
* This call does no blocking I/O.
*
* Returns: (transfer full): a #GFile to the specified child, or
* %NULL if the display name couldn't be converted.
* Free the returned object with g_object_unref().
*/
GFile *
g_file_get_child_for_display_name (GFile *file,
const char *display_name,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), NULL);
g_return_val_if_fail (display_name != NULL, NULL);
iface = G_FILE_GET_IFACE (file);
return (* iface->get_child_for_display_name) (file, display_name, error);
}
/**
* g_file_has_prefix: (virtual prefix_matches)
* @file: input #GFile
* @prefix: input #GFile
*
* Checks whether @file has the prefix specified by @prefix.
*
* In other words, if the names of initial elements of @file's
* pathname match @prefix. Only full pathname elements are matched,
* so a path like /foo is not considered a prefix of /foobar, only
* of /foo/bar.
*
* A #GFile is not a prefix of itself. If you want to check for
* equality, use g_file_equal().
*
* This call does no I/O, as it works purely on names. As such it can
* sometimes return %FALSE even if @file is inside a @prefix (from a
* filesystem point of view), because the prefix of @file is an alias
* of @prefix.
*
* Returns: %TRUE if the @file's parent, grandparent, etc is @prefix,
* %FALSE otherwise.
*/
gboolean
g_file_has_prefix (GFile *file,
GFile *prefix)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), FALSE);
g_return_val_if_fail (G_IS_FILE (prefix), FALSE);
if (G_TYPE_FROM_INSTANCE (file) != G_TYPE_FROM_INSTANCE (prefix))
return FALSE;
iface = G_FILE_GET_IFACE (file);
/* The vtable function differs in arg order since
* we're using the old contains_file call
*/
return (* iface->prefix_matches) (prefix, file);
}
/**
* g_file_get_relative_path: (virtual get_relative_path)
* @parent: input #GFile
* @descendant: input #GFile
*
* Gets the path for @descendant relative to @parent.
*
* This call does no blocking I/O.
*
* Returns: (type filename) (nullable): string with the relative path from
* @descendant to @parent, or %NULL if @descendant doesn't have @parent as
* prefix. The returned string should be freed with g_free() when
* no longer needed.
*/
char *
g_file_get_relative_path (GFile *parent,
GFile *descendant)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (parent), NULL);
g_return_val_if_fail (G_IS_FILE (descendant), NULL);
if (G_TYPE_FROM_INSTANCE (parent) != G_TYPE_FROM_INSTANCE (descendant))
return NULL;
iface = G_FILE_GET_IFACE (parent);
return (* iface->get_relative_path) (parent, descendant);
}
/**
* g_file_resolve_relative_path:
* @file: input #GFile
* @relative_path: (type filename): a given relative path string
*
* Resolves a relative path for @file to an absolute path.
*
* This call does no blocking I/O.
*
* If the @relative_path is an absolute path name, the resolution
* is done absolutely (without taking @file path as base).
*
* Returns: (transfer full): a #GFile for the resolved path.
*/
GFile *
g_file_resolve_relative_path (GFile *file,
const char *relative_path)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), NULL);
g_return_val_if_fail (relative_path != NULL, NULL);
iface = G_FILE_GET_IFACE (file);
return (* iface->resolve_relative_path) (file, relative_path);
}
/**
* g_file_enumerate_children:
* @file: input #GFile
* @attributes: an attribute query string
* @flags: a set of #GFileQueryInfoFlags
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @error: #GError for error reporting
*
* Gets the requested information about the files in a directory.
* The result is a #GFileEnumerator object that will give out
* #GFileInfo objects for all the files in the directory.
*
* The @attributes value is a string that specifies the file
* attributes that should be gathered. It is not an error if
* it's not possible to read a particular requested attribute
* from a file - it just won't be set. @attributes should
* be a comma-separated list of attributes or attribute wildcards.
* The wildcard "*" means all attributes, and a wildcard like
* "standard::*" means all attributes in the standard namespace.
* An example attribute query be "standard::*,owner::user".
* The standard attributes are available as defines, like
* %G_FILE_ATTRIBUTE_STANDARD_NAME. %G_FILE_ATTRIBUTE_STANDARD_NAME should
* always be specified if you plan to call g_file_enumerator_get_child() or
* g_file_enumerator_iterate() on the returned enumerator.
*
* If @cancellable is not %NULL, then the operation can be cancelled
* by triggering the cancellable object from another thread. If the
* operation was cancelled, the error %G_IO_ERROR_CANCELLED will be
* returned.
*
* If the file does not exist, the %G_IO_ERROR_NOT_FOUND error will
* be returned. If the file is not a directory, the %G_IO_ERROR_NOT_DIRECTORY
* error will be returned. Other errors are possible too.
*
* Returns: (transfer full): A #GFileEnumerator if successful,
* %NULL on error. Free the returned object with g_object_unref().
*/
GFileEnumerator *
g_file_enumerate_children (GFile *file,
const char *attributes,
GFileQueryInfoFlags flags,
GCancellable *cancellable,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), NULL);
if (g_cancellable_set_error_if_cancelled (cancellable, error))
return NULL;
iface = G_FILE_GET_IFACE (file);
if (iface->enumerate_children == NULL)
{
g_set_error_literal (error, G_IO_ERROR,
G_IO_ERROR_NOT_SUPPORTED,
_("Operation not supported"));
return NULL;
}
return (* iface->enumerate_children) (file, attributes, flags,
cancellable, error);
}
/**
* g_file_enumerate_children_async:
* @file: input #GFile
* @attributes: an attribute query string
* @flags: a set of #GFileQueryInfoFlags
* @io_priority: the [I/O priority](iface.AsyncResult.html#io-priority) of the request
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @callback: (scope async) (closure user_data): a #GAsyncReadyCallback
* to call when the request is satisfied
* @user_data: the data to pass to callback function
*
* Asynchronously gets the requested information about the files
* in a directory. The result is a #GFileEnumerator object that will
* give out #GFileInfo objects for all the files in the directory.
*
* For more details, see g_file_enumerate_children() which is
* the synchronous version of this call.
*
* When the operation is finished, @callback will be called. You can
* then call g_file_enumerate_children_finish() to get the result of
* the operation.
*/
void
g_file_enumerate_children_async (GFile *file,
const char *attributes,
GFileQueryInfoFlags flags,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GFileIface *iface;
g_return_if_fail (G_IS_FILE (file));
iface = G_FILE_GET_IFACE (file);
(* iface->enumerate_children_async) (file,
attributes,
flags,
io_priority,
cancellable,
callback,
user_data);
}
/**
* g_file_enumerate_children_finish:
* @file: input #GFile
* @res: a #GAsyncResult
* @error: a #GError
*
* Finishes an async enumerate children operation.
* See g_file_enumerate_children_async().
*
* Returns: (transfer full): a #GFileEnumerator or %NULL
* if an error occurred.
* Free the returned object with g_object_unref().
*/
GFileEnumerator *
g_file_enumerate_children_finish (GFile *file,
GAsyncResult *res,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), NULL);
g_return_val_if_fail (G_IS_ASYNC_RESULT (res), NULL);
if (g_async_result_legacy_propagate_error (res, error))
return NULL;
iface = G_FILE_GET_IFACE (file);
return (* iface->enumerate_children_finish) (file, res, error);
}
/**
* g_file_query_exists:
* @file: input #GFile
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
*
* Utility function to check if a particular file exists. This is
* implemented using g_file_query_info() and as such does blocking I/O.
*
* Note that in many cases it is [racy to first check for file existence](https://en.wikipedia.org/wiki/Time_of_check_to_time_of_use)
* and then execute something based on the outcome of that, because the
* file might have been created or removed in between the operations. The
* general approach to handling that is to not check, but just do the
* operation and handle the errors as they come.
*
* As an example of race-free checking, take the case of reading a file,
* and if it doesn't exist, creating it. There are two racy versions: read
* it, and on error create it; and: check if it exists, if not create it.
* These can both result in two processes creating the file (with perhaps
* a partially written file as the result). The correct approach is to
* always try to create the file with g_file_create() which will either
* atomically create the file or fail with a %G_IO_ERROR_EXISTS error.
*
* However, in many cases an existence check is useful in a user interface,
* for instance to make a menu item sensitive/insensitive, so that you don't
* have to fool users that something is possible and then just show an error
* dialog. If you do this, you should make sure to also handle the errors
* that can happen due to races when you execute the operation.
*
* Returns: %TRUE if the file exists (and can be detected without error),
* %FALSE otherwise (or if cancelled).
*/
gboolean
g_file_query_exists (GFile *file,
GCancellable *cancellable)
{
GFileInfo *info;
g_return_val_if_fail (G_IS_FILE(file), FALSE);
info = g_file_query_info (file, G_FILE_ATTRIBUTE_STANDARD_TYPE,
G_FILE_QUERY_INFO_NONE, cancellable, NULL);
if (info != NULL)
{
g_object_unref (info);
return TRUE;
}
return FALSE;
}
/**
* g_file_query_file_type:
* @file: input #GFile
* @flags: a set of #GFileQueryInfoFlags passed to g_file_query_info()
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
*
* Utility function to inspect the #GFileType of a file. This is
* implemented using g_file_query_info() and as such does blocking I/O.
*
* The primary use case of this method is to check if a file is
* a regular file, directory, or symlink.
*
* Returns: The #GFileType of the file and %G_FILE_TYPE_UNKNOWN
* if the file does not exist
*
* Since: 2.18
*/
GFileType
g_file_query_file_type (GFile *file,
GFileQueryInfoFlags flags,
GCancellable *cancellable)
{
GFileInfo *info;
GFileType file_type;
g_return_val_if_fail (G_IS_FILE(file), G_FILE_TYPE_UNKNOWN);
info = g_file_query_info (file, G_FILE_ATTRIBUTE_STANDARD_TYPE, flags,
cancellable, NULL);
if (info != NULL)
{
file_type = g_file_info_get_file_type (info);
g_object_unref (info);
}
else
file_type = G_FILE_TYPE_UNKNOWN;
return file_type;
}
/**
* g_file_query_info:
* @file: input #GFile
* @attributes: an attribute query string
* @flags: a set of #GFileQueryInfoFlags
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @error: a #GError
*
* Gets the requested information about specified @file.
* The result is a #GFileInfo object that contains key-value
* attributes (such as the type or size of the file).
*
* The @attributes value is a string that specifies the file
* attributes that should be gathered. It is not an error if
* it's not possible to read a particular requested attribute
* from a file - it just won't be set. @attributes should be a
* comma-separated list of attributes or attribute wildcards.
* The wildcard "*" means all attributes, and a wildcard like
* "standard::*" means all attributes in the standard namespace.
* An example attribute query be "standard::*,owner::user".
* The standard attributes are available as defines, like
* %G_FILE_ATTRIBUTE_STANDARD_NAME.
*
* If @cancellable is not %NULL, then the operation can be cancelled
* by triggering the cancellable object from another thread. If the
* operation was cancelled, the error %G_IO_ERROR_CANCELLED will be
* returned.
*
* For symlinks, normally the information about the target of the
* symlink is returned, rather than information about the symlink
* itself. However if you pass %G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS
* in @flags the information about the symlink itself will be returned.
* Also, for symlinks that point to non-existing files the information
* about the symlink itself will be returned.
*
* If the file does not exist, the %G_IO_ERROR_NOT_FOUND error will be
* returned. Other errors are possible too, and depend on what kind of
* filesystem the file is on.
*
* Returns: (transfer full): a #GFileInfo for the given @file, or %NULL
* on error. Free the returned object with g_object_unref().
*/
GFileInfo *
g_file_query_info (GFile *file,
const char *attributes,
GFileQueryInfoFlags flags,
GCancellable *cancellable,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), NULL);
if (g_cancellable_set_error_if_cancelled (cancellable, error))
return NULL;
iface = G_FILE_GET_IFACE (file);
if (iface->query_info == NULL)
{
g_set_error_literal (error, G_IO_ERROR,
G_IO_ERROR_NOT_SUPPORTED,
_("Operation not supported"));
return NULL;
}
return (* iface->query_info) (file, attributes, flags, cancellable, error);
}
/**
* g_file_query_info_async:
* @file: input #GFile
* @attributes: an attribute query string
* @flags: a set of #GFileQueryInfoFlags
* @io_priority: the [I/O priority](iface.AsyncResult.html#io-priority) of the request
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @callback: (scope async) (closure user_data): a #GAsyncReadyCallback
* to call when the request is satisfied
* @user_data: the data to pass to callback function
*
* Asynchronously gets the requested information about specified @file.
* The result is a #GFileInfo object that contains key-value attributes
* (such as type or size for the file).
*
* For more details, see g_file_query_info() which is the synchronous
* version of this call.
*
* When the operation is finished, @callback will be called. You can
* then call g_file_query_info_finish() to get the result of the operation.
*/
void
g_file_query_info_async (GFile *file,
const char *attributes,
GFileQueryInfoFlags flags,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GFileIface *iface;
g_return_if_fail (G_IS_FILE (file));
iface = G_FILE_GET_IFACE (file);
(* iface->query_info_async) (file,
attributes,
flags,
io_priority,
cancellable,
callback,
user_data);
}
/**
* g_file_query_info_finish:
* @file: input #GFile
* @res: a #GAsyncResult
* @error: a #GError
*
* Finishes an asynchronous file info query.
* See g_file_query_info_async().
*
* Returns: (transfer full): #GFileInfo for given @file
* or %NULL on error. Free the returned object with
* g_object_unref().
*/
GFileInfo *
g_file_query_info_finish (GFile *file,
GAsyncResult *res,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), NULL);
g_return_val_if_fail (G_IS_ASYNC_RESULT (res), NULL);
if (g_async_result_legacy_propagate_error (res, error))
return NULL;
iface = G_FILE_GET_IFACE (file);
return (* iface->query_info_finish) (file, res, error);
}
/**
* g_file_query_filesystem_info:
* @file: input #GFile
* @attributes: an attribute query string
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @error: a #GError
*
* Similar to g_file_query_info(), but obtains information
* about the filesystem the @file is on, rather than the file itself.
* For instance the amount of space available and the type of
* the filesystem.
*
* The @attributes value is a string that specifies the attributes
* that should be gathered. It is not an error if it's not possible
* to read a particular requested attribute from a file - it just
* won't be set. @attributes should be a comma-separated list of
* attributes or attribute wildcards. The wildcard "*" means all
* attributes, and a wildcard like "filesystem::*" means all attributes
* in the filesystem namespace. The standard namespace for filesystem
* attributes is "filesystem". Common attributes of interest are
* %G_FILE_ATTRIBUTE_FILESYSTEM_SIZE (the total size of the filesystem
* in bytes), %G_FILE_ATTRIBUTE_FILESYSTEM_FREE (number of bytes available),
* and %G_FILE_ATTRIBUTE_FILESYSTEM_TYPE (type of the filesystem).
*
* If @cancellable is not %NULL, then the operation can be cancelled
* by triggering the cancellable object from another thread. If the
* operation was cancelled, the error %G_IO_ERROR_CANCELLED will be
* returned.
*
* If the file does not exist, the %G_IO_ERROR_NOT_FOUND error will
* be returned. Other errors are possible too, and depend on what
* kind of filesystem the file is on.
*
* Returns: (transfer full): a #GFileInfo or %NULL if there was an error.
* Free the returned object with g_object_unref().
*/
GFileInfo *
g_file_query_filesystem_info (GFile *file,
const char *attributes,
GCancellable *cancellable,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), NULL);
if (g_cancellable_set_error_if_cancelled (cancellable, error))
return NULL;
iface = G_FILE_GET_IFACE (file);
if (iface->query_filesystem_info == NULL)
{
g_set_error_literal (error, G_IO_ERROR,
G_IO_ERROR_NOT_SUPPORTED,
_("Operation not supported"));
return NULL;
}
return (* iface->query_filesystem_info) (file, attributes, cancellable, error);
}
/**
* g_file_query_filesystem_info_async:
* @file: input #GFile
* @attributes: an attribute query string
* @io_priority: the [I/O priority](iface.AsyncResult.html#io-priority) of the request
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @callback: (scope async) (closure user_data): a #GAsyncReadyCallback
* to call when the request is satisfied
* @user_data: the data to pass to callback function
*
* Asynchronously gets the requested information about the filesystem
* that the specified @file is on. The result is a #GFileInfo object
* that contains key-value attributes (such as type or size for the
* file).
*
* For more details, see g_file_query_filesystem_info() which is the
* synchronous version of this call.
*
* When the operation is finished, @callback will be called. You can
* then call g_file_query_info_finish() to get the result of the
* operation.
*/
void
g_file_query_filesystem_info_async (GFile *file,
const char *attributes,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GFileIface *iface;
g_return_if_fail (G_IS_FILE (file));
iface = G_FILE_GET_IFACE (file);
(* iface->query_filesystem_info_async) (file,
attributes,
io_priority,
cancellable,
callback,
user_data);
}
/**
* g_file_query_filesystem_info_finish:
* @file: input #GFile
* @res: a #GAsyncResult
* @error: a #GError
*
* Finishes an asynchronous filesystem info query.
* See g_file_query_filesystem_info_async().
*
* Returns: (transfer full): #GFileInfo for given @file
* or %NULL on error.
* Free the returned object with g_object_unref().
*/
GFileInfo *
g_file_query_filesystem_info_finish (GFile *file,
GAsyncResult *res,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), NULL);
g_return_val_if_fail (G_IS_ASYNC_RESULT (res), NULL);
if (g_async_result_legacy_propagate_error (res, error))
return NULL;
iface = G_FILE_GET_IFACE (file);
return (* iface->query_filesystem_info_finish) (file, res, error);
}
/**
* g_file_find_enclosing_mount:
* @file: input #GFile
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @error: a #GError
*
* Gets a #GMount for the #GFile.
*
* #GMount is returned only for user interesting locations, see
* #GVolumeMonitor. If the #GFileIface for @file does not have a #mount,
* @error will be set to %G_IO_ERROR_NOT_FOUND and %NULL #will be returned.
*
* If @cancellable is not %NULL, then the operation can be cancelled by
* triggering the cancellable object from another thread. If the operation
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
*
* Returns: (transfer full): a #GMount where the @file is located
* or %NULL on error.
* Free the returned object with g_object_unref().
*/
GMount *
g_file_find_enclosing_mount (GFile *file,
GCancellable *cancellable,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), NULL);
if (g_cancellable_set_error_if_cancelled (cancellable, error))
return NULL;
iface = G_FILE_GET_IFACE (file);
if (iface->find_enclosing_mount == NULL)
{
g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_NOT_FOUND,
/* Translators: This is an error message when
* trying to find the enclosing (user visible)
* mount of a file, but none exists.
*/
_("Containing mount does not exist"));
return NULL;
}
return (* iface->find_enclosing_mount) (file, cancellable, error);
}
/**
* g_file_find_enclosing_mount_async:
* @file: a #GFile
* @io_priority: the [I/O priority](iface.AsyncResult.html#io-priority) of the request
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @callback: (scope async) (closure user_data): a #GAsyncReadyCallback
* to call when the request is satisfied
* @user_data: the data to pass to callback function
*
* Asynchronously gets the mount for the file.
*
* For more details, see g_file_find_enclosing_mount() which is
* the synchronous version of this call.
*
* When the operation is finished, @callback will be called.
* You can then call g_file_find_enclosing_mount_finish() to
* get the result of the operation.
*/
void
g_file_find_enclosing_mount_async (GFile *file,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GFileIface *iface;
g_return_if_fail (G_IS_FILE (file));
iface = G_FILE_GET_IFACE (file);
(* iface->find_enclosing_mount_async) (file,
io_priority,
cancellable,
callback,
user_data);
}
/**
* g_file_find_enclosing_mount_finish:
* @file: a #GFile
* @res: a #GAsyncResult
* @error: a #GError
*
* Finishes an asynchronous find mount request.
* See g_file_find_enclosing_mount_async().
*
* Returns: (transfer full): #GMount for given @file or %NULL on error.
* Free the returned object with g_object_unref().
*/
GMount *
g_file_find_enclosing_mount_finish (GFile *file,
GAsyncResult *res,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), NULL);
g_return_val_if_fail (G_IS_ASYNC_RESULT (res), NULL);
if (g_async_result_legacy_propagate_error (res, error))
return NULL;
iface = G_FILE_GET_IFACE (file);
return (* iface->find_enclosing_mount_finish) (file, res, error);
}
/**
* g_file_read: (virtual read_fn)
* @file: #GFile to read
* @cancellable: (nullable): a #GCancellable
* @error: a #GError, or %NULL
*
* Opens a file for reading. The result is a #GFileInputStream that
* can be used to read the contents of the file.
*
* If @cancellable is not %NULL, then the operation can be cancelled by
* triggering the cancellable object from another thread. If the operation
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
*
* If the file does not exist, the %G_IO_ERROR_NOT_FOUND error will be
* returned. If the file is a directory, the %G_IO_ERROR_IS_DIRECTORY
* error will be returned. Other errors are possible too, and depend
* on what kind of filesystem the file is on.
*
* Returns: (transfer full): #GFileInputStream or %NULL on error.
* Free the returned object with g_object_unref().
*/
GFileInputStream *
g_file_read (GFile *file,
GCancellable *cancellable,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), NULL);
if (g_cancellable_set_error_if_cancelled (cancellable, error))
return NULL;
iface = G_FILE_GET_IFACE (file);
if (iface->read_fn == NULL)
{
g_set_error_literal (error, G_IO_ERROR,
G_IO_ERROR_NOT_SUPPORTED,
_("Operation not supported"));
return NULL;
}
return (* iface->read_fn) (file, cancellable, error);
}
/**
* g_file_append_to:
* @file: input #GFile
* @flags: a set of #GFileCreateFlags
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @error: a #GError, or %NULL
*
* Gets an output stream for appending data to the file.
* If the file doesn't already exist it is created.
*
* By default files created are generally readable by everyone,
* but if you pass %G_FILE_CREATE_PRIVATE in @flags the file
* will be made readable only to the current user, to the level that
* is supported on the target filesystem.
*
* If @cancellable is not %NULL, then the operation can be cancelled
* by triggering the cancellable object from another thread. If the
* operation was cancelled, the error %G_IO_ERROR_CANCELLED will be
* returned.
*
* Some file systems don't allow all file names, and may return an
* %G_IO_ERROR_INVALID_FILENAME error. If the file is a directory the
* %G_IO_ERROR_IS_DIRECTORY error will be returned. Other errors are
* possible too, and depend on what kind of filesystem the file is on.
*
* Returns: (transfer full): a #GFileOutputStream, or %NULL on error.
* Free the returned object with g_object_unref().
*/
GFileOutputStream *
g_file_append_to (GFile *file,
GFileCreateFlags flags,
GCancellable *cancellable,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), NULL);
if (g_cancellable_set_error_if_cancelled (cancellable, error))
return NULL;
iface = G_FILE_GET_IFACE (file);
if (iface->append_to == NULL)
{
g_set_error_literal (error, G_IO_ERROR,
G_IO_ERROR_NOT_SUPPORTED,
_("Operation not supported"));
return NULL;
}
return (* iface->append_to) (file, flags, cancellable, error);
}
/**
* g_file_create:
* @file: input #GFile
* @flags: a set of #GFileCreateFlags
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @error: a #GError, or %NULL
*
* Creates a new file and returns an output stream for writing to it.
* The file must not already exist.
*
* By default files created are generally readable by everyone,
* but if you pass %G_FILE_CREATE_PRIVATE in @flags the file
* will be made readable only to the current user, to the level
* that is supported on the target filesystem.
*
* If @cancellable is not %NULL, then the operation can be cancelled
* by triggering the cancellable object from another thread. If the
* operation was cancelled, the error %G_IO_ERROR_CANCELLED will be
* returned.
*
* If a file or directory with this name already exists the
* %G_IO_ERROR_EXISTS error will be returned. Some file systems don't
* allow all file names, and may return an %G_IO_ERROR_INVALID_FILENAME
* error, and if the name is to long %G_IO_ERROR_FILENAME_TOO_LONG will
* be returned. Other errors are possible too, and depend on what kind
* of filesystem the file is on.
*
* Returns: (transfer full): a #GFileOutputStream for the newly created
* file, or %NULL on error.
* Free the returned object with g_object_unref().
*/
GFileOutputStream *
g_file_create (GFile *file,
GFileCreateFlags flags,
GCancellable *cancellable,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), NULL);
if (g_cancellable_set_error_if_cancelled (cancellable, error))
return NULL;
iface = G_FILE_GET_IFACE (file);
if (iface->create == NULL)
{
g_set_error_literal (error, G_IO_ERROR,
G_IO_ERROR_NOT_SUPPORTED,
_("Operation not supported"));
return NULL;
}
return (* iface->create) (file, flags, cancellable, error);
}
/**
* g_file_replace:
* @file: input #GFile
* @etag: (nullable): an optional [entity tag](#entity-tags)
* for the current #GFile, or #NULL to ignore
* @make_backup: %TRUE if a backup should be created
* @flags: a set of #GFileCreateFlags
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @error: a #GError, or %NULL
*
* Returns an output stream for overwriting the file, possibly
* creating a backup copy of the file first. If the file doesn't exist,
* it will be created.
*
* This will try to replace the file in the safest way possible so
* that any errors during the writing will not affect an already
* existing copy of the file. For instance, for local files it
* may write to a temporary file and then atomically rename over
* the destination when the stream is closed.
*
* By default files created are generally readable by everyone,
* but if you pass %G_FILE_CREATE_PRIVATE in @flags the file
* will be made readable only to the current user, to the level that
* is supported on the target filesystem.
*
* If @cancellable is not %NULL, then the operation can be cancelled
* by triggering the cancellable object from another thread. If the
* operation was cancelled, the error %G_IO_ERROR_CANCELLED will be
* returned.
*
* If you pass in a non-%NULL @etag value and @file already exists, then
* this value is compared to the current entity tag of the file, and if
* they differ an %G_IO_ERROR_WRONG_ETAG error is returned. This
* generally means that the file has been changed since you last read
* it. You can get the new etag from g_file_output_stream_get_etag()
* after you've finished writing and closed the #GFileOutputStream. When
* you load a new file you can use g_file_input_stream_query_info() to
* get the etag of the file.
*
* If @make_backup is %TRUE, this function will attempt to make a
* backup of the current file before overwriting it. If this fails
* a %G_IO_ERROR_CANT_CREATE_BACKUP error will be returned. If you
* want to replace anyway, try again with @make_backup set to %FALSE.
*
* If the file is a directory the %G_IO_ERROR_IS_DIRECTORY error will
* be returned, and if the file is some other form of non-regular file
* then a %G_IO_ERROR_NOT_REGULAR_FILE error will be returned. Some
* file systems don't allow all file names, and may return an
* %G_IO_ERROR_INVALID_FILENAME error, and if the name is to long
* %G_IO_ERROR_FILENAME_TOO_LONG will be returned. Other errors are
* possible too, and depend on what kind of filesystem the file is on.
*
* Returns: (transfer full): a #GFileOutputStream or %NULL on error.
* Free the returned object with g_object_unref().
*/
GFileOutputStream *
g_file_replace (GFile *file,
const char *etag,
gboolean make_backup,
GFileCreateFlags flags,
GCancellable *cancellable,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), NULL);
if (g_cancellable_set_error_if_cancelled (cancellable, error))
return NULL;
iface = G_FILE_GET_IFACE (file);
if (iface->replace == NULL)
{
g_set_error_literal (error, G_IO_ERROR,
G_IO_ERROR_NOT_SUPPORTED,
_("Operation not supported"));
return NULL;
}
/* Handle empty tag string as NULL in consistent way. */
if (etag && *etag == 0)
etag = NULL;
return (* iface->replace) (file, etag, make_backup, flags, cancellable, error);
}
/**
* g_file_open_readwrite:
* @file: #GFile to open
* @cancellable: (nullable): a #GCancellable
* @error: a #GError, or %NULL
*
* Opens an existing file for reading and writing. The result is
* a #GFileIOStream that can be used to read and write the contents
* of the file.
*
* If @cancellable is not %NULL, then the operation can be cancelled
* by triggering the cancellable object from another thread. If the
* operation was cancelled, the error %G_IO_ERROR_CANCELLED will be
* returned.
*
* If the file does not exist, the %G_IO_ERROR_NOT_FOUND error will
* be returned. If the file is a directory, the %G_IO_ERROR_IS_DIRECTORY
* error will be returned. Other errors are possible too, and depend on
* what kind of filesystem the file is on. Note that in many non-local
* file cases read and write streams are not supported, so make sure you
* really need to do read and write streaming, rather than just opening
* for reading or writing.
*
* Returns: (transfer full): #GFileIOStream or %NULL on error.
* Free the returned object with g_object_unref().
*
* Since: 2.22
*/
GFileIOStream *
g_file_open_readwrite (GFile *file,
GCancellable *cancellable,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), NULL);
if (g_cancellable_set_error_if_cancelled (cancellable, error))
return NULL;
iface = G_FILE_GET_IFACE (file);
if (iface->open_readwrite == NULL)
{
g_set_error_literal (error, G_IO_ERROR,
G_IO_ERROR_NOT_SUPPORTED,
_("Operation not supported"));
return NULL;
}
return (* iface->open_readwrite) (file, cancellable, error);
}
/**
* g_file_create_readwrite:
* @file: a #GFile
* @flags: a set of #GFileCreateFlags
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @error: return location for a #GError, or %NULL
*
* Creates a new file and returns a stream for reading and
* writing to it. The file must not already exist.
*
* By default files created are generally readable by everyone,
* but if you pass %G_FILE_CREATE_PRIVATE in @flags the file
* will be made readable only to the current user, to the level
* that is supported on the target filesystem.
*
* If @cancellable is not %NULL, then the operation can be cancelled
* by triggering the cancellable object from another thread. If the
* operation was cancelled, the error %G_IO_ERROR_CANCELLED will be
* returned.
*
* If a file or directory with this name already exists, the
* %G_IO_ERROR_EXISTS error will be returned. Some file systems don't
* allow all file names, and may return an %G_IO_ERROR_INVALID_FILENAME
* error, and if the name is too long, %G_IO_ERROR_FILENAME_TOO_LONG
* will be returned. Other errors are possible too, and depend on what
* kind of filesystem the file is on.
*
* Note that in many non-local file cases read and write streams are
* not supported, so make sure you really need to do read and write
* streaming, rather than just opening for reading or writing.
*
* Returns: (transfer full): a #GFileIOStream for the newly created
* file, or %NULL on error.
* Free the returned object with g_object_unref().
*
* Since: 2.22
*/
GFileIOStream *
g_file_create_readwrite (GFile *file,
GFileCreateFlags flags,
GCancellable *cancellable,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), NULL);
if (g_cancellable_set_error_if_cancelled (cancellable, error))
return NULL;
iface = G_FILE_GET_IFACE (file);
if (iface->create_readwrite == NULL)
{
g_set_error_literal (error, G_IO_ERROR,
G_IO_ERROR_NOT_SUPPORTED,
_("Operation not supported"));
return NULL;
}
return (* iface->create_readwrite) (file, flags, cancellable, error);
}
/**
* g_file_replace_readwrite:
* @file: a #GFile
* @etag: (nullable): an optional [entity tag](#entity-tags)
* for the current #GFile, or #NULL to ignore
* @make_backup: %TRUE if a backup should be created
* @flags: a set of #GFileCreateFlags
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @error: return location for a #GError, or %NULL
*
* Returns an output stream for overwriting the file in readwrite mode,
* possibly creating a backup copy of the file first. If the file doesn't
* exist, it will be created.
*
* For details about the behaviour, see g_file_replace() which does the
* same thing but returns an output stream only.
*
* Note that in many non-local file cases read and write streams are not
* supported, so make sure you really need to do read and write streaming,
* rather than just opening for reading or writing.
*
* Returns: (transfer full): a #GFileIOStream or %NULL on error.
* Free the returned object with g_object_unref().
*
* Since: 2.22
*/
GFileIOStream *
g_file_replace_readwrite (GFile *file,
const char *etag,
gboolean make_backup,
GFileCreateFlags flags,
GCancellable *cancellable,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), NULL);
if (g_cancellable_set_error_if_cancelled (cancellable, error))
return NULL;
iface = G_FILE_GET_IFACE (file);
if (iface->replace_readwrite == NULL)
{
g_set_error_literal (error, G_IO_ERROR,
G_IO_ERROR_NOT_SUPPORTED,
_("Operation not supported"));
return NULL;
}
return (* iface->replace_readwrite) (file, etag, make_backup, flags, cancellable, error);
}
/**
* g_file_read_async:
* @file: input #GFile
* @io_priority: the [I/O priority](iface.AsyncResult.html#io-priority) of the request
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @callback: (scope async) (closure user_data): a #GAsyncReadyCallback
* to call when the request is satisfied
* @user_data: the data to pass to callback function
*
* Asynchronously opens @file for reading.
*
* For more details, see g_file_read() which is
* the synchronous version of this call.
*
* When the operation is finished, @callback will be called.
* You can then call g_file_read_finish() to get the result
* of the operation.
*/
void
g_file_read_async (GFile *file,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GFileIface *iface;
g_return_if_fail (G_IS_FILE (file));
iface = G_FILE_GET_IFACE (file);
(* iface->read_async) (file,
io_priority,
cancellable,
callback,
user_data);
}
/**
* g_file_read_finish:
* @file: input #GFile
* @res: a #GAsyncResult
* @error: a #GError, or %NULL
*
* Finishes an asynchronous file read operation started with
* g_file_read_async().
*
* Returns: (transfer full): a #GFileInputStream or %NULL on error.
* Free the returned object with g_object_unref().
*/
GFileInputStream *
g_file_read_finish (GFile *file,
GAsyncResult *res,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), NULL);
g_return_val_if_fail (G_IS_ASYNC_RESULT (res), NULL);
if (g_async_result_legacy_propagate_error (res, error))
return NULL;
iface = G_FILE_GET_IFACE (file);
return (* iface->read_finish) (file, res, error);
}
/**
* g_file_append_to_async:
* @file: input #GFile
* @flags: a set of #GFileCreateFlags
* @io_priority: the [I/O priority](iface.AsyncResult.html#io-priority) of the request
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @callback: (scope async) (closure user_data): a #GAsyncReadyCallback
* to call when the request is satisfied
* @user_data: the data to pass to callback function
*
* Asynchronously opens @file for appending.
*
* For more details, see g_file_append_to() which is
* the synchronous version of this call.
*
* When the operation is finished, @callback will be called.
* You can then call g_file_append_to_finish() to get the result
* of the operation.
*/
void
g_file_append_to_async (GFile *file,
GFileCreateFlags flags,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GFileIface *iface;
g_return_if_fail (G_IS_FILE (file));
iface = G_FILE_GET_IFACE (file);
(* iface->append_to_async) (file,
flags,
io_priority,
cancellable,
callback,
user_data);
}
/**
* g_file_append_to_finish:
* @file: input #GFile
* @res: #GAsyncResult
* @error: a #GError, or %NULL
*
* Finishes an asynchronous file append operation started with
* g_file_append_to_async().
*
* Returns: (transfer full): a valid #GFileOutputStream
* or %NULL on error.
* Free the returned object with g_object_unref().
*/
GFileOutputStream *
g_file_append_to_finish (GFile *file,
GAsyncResult *res,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), NULL);
g_return_val_if_fail (G_IS_ASYNC_RESULT (res), NULL);
if (g_async_result_legacy_propagate_error (res, error))
return NULL;
iface = G_FILE_GET_IFACE (file);
return (* iface->append_to_finish) (file, res, error);
}
/**
* g_file_create_async:
* @file: input #GFile
* @flags: a set of #GFileCreateFlags
* @io_priority: the [I/O priority](iface.AsyncResult.html#io-priority) of the request
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @callback: (scope async) (closure user_data): a #GAsyncReadyCallback
* to call when the request is satisfied
* @user_data: the data to pass to callback function
*
* Asynchronously creates a new file and returns an output stream
* for writing to it. The file must not already exist.
*
* For more details, see g_file_create() which is
* the synchronous version of this call.
*
* When the operation is finished, @callback will be called.
* You can then call g_file_create_finish() to get the result
* of the operation.
*/
void
g_file_create_async (GFile *file,
GFileCreateFlags flags,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GFileIface *iface;
g_return_if_fail (G_IS_FILE (file));
iface = G_FILE_GET_IFACE (file);
(* iface->create_async) (file,
flags,
io_priority,
cancellable,
callback,
user_data);
}
/**
* g_file_create_finish:
* @file: input #GFile
* @res: a #GAsyncResult
* @error: a #GError, or %NULL
*
* Finishes an asynchronous file create operation started with
* g_file_create_async().
*
* Returns: (transfer full): a #GFileOutputStream or %NULL on error.
* Free the returned object with g_object_unref().
*/
GFileOutputStream *
g_file_create_finish (GFile *file,
GAsyncResult *res,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), NULL);
g_return_val_if_fail (G_IS_ASYNC_RESULT (res), NULL);
if (g_async_result_legacy_propagate_error (res, error))
return NULL;
iface = G_FILE_GET_IFACE (file);
return (* iface->create_finish) (file, res, error);
}
/**
* g_file_replace_async:
* @file: input #GFile
* @etag: (nullable): an [entity tag](#entity-tags) for the current #GFile,
* or %NULL to ignore
* @make_backup: %TRUE if a backup should be created
* @flags: a set of #GFileCreateFlags
* @io_priority: the [I/O priority](iface.AsyncResult.html#io-priority) of the request
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @callback: (scope async) (closure user_data): a #GAsyncReadyCallback
* to call when the request is satisfied
* @user_data: the data to pass to callback function
*
* Asynchronously overwrites the file, replacing the contents,
* possibly creating a backup copy of the file first.
*
* For more details, see g_file_replace() which is
* the synchronous version of this call.
*
* When the operation is finished, @callback will be called.
* You can then call g_file_replace_finish() to get the result
* of the operation.
*/
void
g_file_replace_async (GFile *file,
const char *etag,
gboolean make_backup,
GFileCreateFlags flags,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GFileIface *iface;
g_return_if_fail (G_IS_FILE (file));
iface = G_FILE_GET_IFACE (file);
(* iface->replace_async) (file,
etag,
make_backup,
flags,
io_priority,
cancellable,
callback,
user_data);
}
/**
* g_file_replace_finish:
* @file: input #GFile
* @res: a #GAsyncResult
* @error: a #GError, or %NULL
*
* Finishes an asynchronous file replace operation started with
* g_file_replace_async().
*
* Returns: (transfer full): a #GFileOutputStream, or %NULL on error.
* Free the returned object with g_object_unref().
*/
GFileOutputStream *
g_file_replace_finish (GFile *file,
GAsyncResult *res,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), NULL);
g_return_val_if_fail (G_IS_ASYNC_RESULT (res), NULL);
if (g_async_result_legacy_propagate_error (res, error))
return NULL;
iface = G_FILE_GET_IFACE (file);
return (* iface->replace_finish) (file, res, error);
}
/**
* g_file_open_readwrite_async
* @file: input #GFile
* @io_priority: the [I/O priority](iface.AsyncResult.html#io-priority) of the request
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @callback: (scope async) (closure user_data): a #GAsyncReadyCallback
* to call when the request is satisfied
* @user_data: the data to pass to callback function
*
* Asynchronously opens @file for reading and writing.
*
* For more details, see g_file_open_readwrite() which is
* the synchronous version of this call.
*
* When the operation is finished, @callback will be called.
* You can then call g_file_open_readwrite_finish() to get
* the result of the operation.
*
* Since: 2.22
*/
void
g_file_open_readwrite_async (GFile *file,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GFileIface *iface;
g_return_if_fail (G_IS_FILE (file));
iface = G_FILE_GET_IFACE (file);
(* iface->open_readwrite_async) (file,
io_priority,
cancellable,
callback,
user_data);
}
/**
* g_file_open_readwrite_finish:
* @file: input #GFile
* @res: a #GAsyncResult
* @error: a #GError, or %NULL
*
* Finishes an asynchronous file read operation started with
* g_file_open_readwrite_async().
*
* Returns: (transfer full): a #GFileIOStream or %NULL on error.
* Free the returned object with g_object_unref().
*
* Since: 2.22
*/
GFileIOStream *
g_file_open_readwrite_finish (GFile *file,
GAsyncResult *res,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), NULL);
g_return_val_if_fail (G_IS_ASYNC_RESULT (res), NULL);
if (g_async_result_legacy_propagate_error (res, error))
return NULL;
iface = G_FILE_GET_IFACE (file);
return (* iface->open_readwrite_finish) (file, res, error);
}
/**
* g_file_create_readwrite_async:
* @file: input #GFile
* @flags: a set of #GFileCreateFlags
* @io_priority: the [I/O priority](iface.AsyncResult.html#io-priority) of the request
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @callback: (scope async) (closure user_data): a #GAsyncReadyCallback
* to call when the request is satisfied
* @user_data: the data to pass to callback function
*
* Asynchronously creates a new file and returns a stream
* for reading and writing to it. The file must not already exist.
*
* For more details, see g_file_create_readwrite() which is
* the synchronous version of this call.
*
* When the operation is finished, @callback will be called.
* You can then call g_file_create_readwrite_finish() to get
* the result of the operation.
*
* Since: 2.22
*/
void
g_file_create_readwrite_async (GFile *file,
GFileCreateFlags flags,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GFileIface *iface;
g_return_if_fail (G_IS_FILE (file));
iface = G_FILE_GET_IFACE (file);
(* iface->create_readwrite_async) (file,
flags,
io_priority,
cancellable,
callback,
user_data);
}
/**
* g_file_create_readwrite_finish:
* @file: input #GFile
* @res: a #GAsyncResult
* @error: a #GError, or %NULL
*
* Finishes an asynchronous file create operation started with
* g_file_create_readwrite_async().
*
* Returns: (transfer full): a #GFileIOStream or %NULL on error.
* Free the returned object with g_object_unref().
*
* Since: 2.22
*/
GFileIOStream *
g_file_create_readwrite_finish (GFile *file,
GAsyncResult *res,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), NULL);
g_return_val_if_fail (G_IS_ASYNC_RESULT (res), NULL);
if (g_async_result_legacy_propagate_error (res, error))
return NULL;
iface = G_FILE_GET_IFACE (file);
return (* iface->create_readwrite_finish) (file, res, error);
}
/**
* g_file_replace_readwrite_async:
* @file: input #GFile
* @etag: (nullable): an [entity tag](#entity-tags) for the current #GFile,
* or %NULL to ignore
* @make_backup: %TRUE if a backup should be created
* @flags: a set of #GFileCreateFlags
* @io_priority: the [I/O priority](iface.AsyncResult.html#io-priority) of the request
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @callback: (scope async) (closure user_data): a #GAsyncReadyCallback
* to call when the request is satisfied
* @user_data: the data to pass to callback function
*
* Asynchronously overwrites the file in read-write mode,
* replacing the contents, possibly creating a backup copy
* of the file first.
*
* For more details, see g_file_replace_readwrite() which is
* the synchronous version of this call.
*
* When the operation is finished, @callback will be called.
* You can then call g_file_replace_readwrite_finish() to get
* the result of the operation.
*
* Since: 2.22
*/
void
g_file_replace_readwrite_async (GFile *file,
const char *etag,
gboolean make_backup,
GFileCreateFlags flags,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GFileIface *iface;
g_return_if_fail (G_IS_FILE (file));
iface = G_FILE_GET_IFACE (file);
(* iface->replace_readwrite_async) (file,
etag,
make_backup,
flags,
io_priority,
cancellable,
callback,
user_data);
}
/**
* g_file_replace_readwrite_finish:
* @file: input #GFile
* @res: a #GAsyncResult
* @error: a #GError, or %NULL
*
* Finishes an asynchronous file replace operation started with
* g_file_replace_readwrite_async().
*
* Returns: (transfer full): a #GFileIOStream, or %NULL on error.
* Free the returned object with g_object_unref().
*
* Since: 2.22
*/
GFileIOStream *
g_file_replace_readwrite_finish (GFile *file,
GAsyncResult *res,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), NULL);
g_return_val_if_fail (G_IS_ASYNC_RESULT (res), NULL);
if (g_async_result_legacy_propagate_error (res, error))
return NULL;
iface = G_FILE_GET_IFACE (file);
return (* iface->replace_readwrite_finish) (file, res, error);
}
static gboolean
copy_symlink (GFile *destination,
GFileCopyFlags flags,
GCancellable *cancellable,
const char *target,
GError **error)
{
GError *my_error;
gboolean tried_delete;
GFileInfo *info;
GFileType file_type;
tried_delete = FALSE;
retry:
my_error = NULL;
if (!g_file_make_symbolic_link (destination, target, cancellable, &my_error))
{
/* Maybe it already existed, and we want to overwrite? */
if (!tried_delete && (flags & G_FILE_COPY_OVERWRITE) &&
my_error->domain == G_IO_ERROR && my_error->code == G_IO_ERROR_EXISTS)
{
g_clear_error (&my_error);
/* Don't overwrite if the destination is a directory */
info = g_file_query_info (destination, G_FILE_ATTRIBUTE_STANDARD_TYPE,
G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS,
cancellable, &my_error);
if (info != NULL)
{
file_type = g_file_info_get_file_type (info);
g_object_unref (info);
if (file_type == G_FILE_TYPE_DIRECTORY)
{
g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_IS_DIRECTORY,
_("Can’t copy over directory"));
return FALSE;
}
}
if (!g_file_delete (destination, cancellable, error))
return FALSE;
tried_delete = TRUE;
goto retry;
}
/* Nah, fail */
g_propagate_error (error, my_error);
return FALSE;
}
return TRUE;
}
static GFileInputStream *
open_source_for_copy (GFile *source,
GFile *destination,
GFileCopyFlags flags,
GCancellable *cancellable,
GError **error)
{
GError *my_error;
GFileInputStream *ret;
GFileInfo *info;
GFileType file_type;
my_error = NULL;
ret = g_file_read (source, cancellable, &my_error);
if (ret != NULL)
return ret;
/* There was an error opening the source, try to set a good error for it: */
if (my_error->domain == G_IO_ERROR && my_error->code == G_IO_ERROR_IS_DIRECTORY)
{
/* The source is a directory, don't fail with WOULD_RECURSE immediately,
* as that is less useful to the app. Better check for errors on the
* target instead.
*/
g_error_free (my_error);
my_error = NULL;
info = g_file_query_info (destination, G_FILE_ATTRIBUTE_STANDARD_TYPE,
G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS,
cancellable, &my_error);
if (info != NULL &&
g_file_info_has_attribute (info, G_FILE_ATTRIBUTE_STANDARD_TYPE))
{
file_type = g_file_info_get_file_type (info);
g_object_unref (info);
if (flags & G_FILE_COPY_OVERWRITE)
{
if (file_type == G_FILE_TYPE_DIRECTORY)
{
g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_WOULD_MERGE,
_("Can’t copy directory over directory"));
return NULL;
}
/* continue to would_recurse error */
}
else
{
g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_EXISTS,
_("Target file exists"));
return NULL;
}
}
else
{
/* Error getting info from target, return that error
* (except for NOT_FOUND, which is no error here)
*/
g_clear_object (&info);
if (my_error != NULL && !g_error_matches (my_error, G_IO_ERROR, G_IO_ERROR_NOT_FOUND))
{
g_propagate_error (error, my_error);
return NULL;
}
g_clear_error (&my_error);
}
g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_WOULD_RECURSE,
_("Can’t recursively copy directory"));
return NULL;
}
g_propagate_error (error, my_error);
return NULL;
}
static gboolean
should_copy (GFileAttributeInfo *info,
gboolean copy_all_attributes,
gboolean skip_perms,
gboolean skip_modified_time)
{
if ((skip_perms && strcmp(info->name, "unix::mode") == 0) ||
(skip_modified_time && strncmp(info->name, "time::modified", 14) == 0))
return FALSE;
if (copy_all_attributes)
return info->flags & G_FILE_ATTRIBUTE_INFO_COPY_WHEN_MOVED;
return info->flags & G_FILE_ATTRIBUTE_INFO_COPY_WITH_FILE;
}
/**
* g_file_build_attribute_list_for_copy:
* @file: a #GFile to copy attributes to
* @flags: a set of #GFileCopyFlags
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @error: a #GError, %NULL to ignore
*
* Prepares the file attribute query string for copying to @file.
*
* This function prepares an attribute query string to be
* passed to g_file_query_info() to get a list of attributes
* normally copied with the file (see g_file_copy_attributes()
* for the detailed description). This function is used by the
* implementation of g_file_copy_attributes() and is useful
* when one needs to query and set the attributes in two
* stages (e.g., for recursive move of a directory).
*
* Returns: an attribute query string for g_file_query_info(),
* or %NULL if an error occurs.
*
* Since: 2.68
*/
char *
g_file_build_attribute_list_for_copy (GFile *file,
GFileCopyFlags flags,
GCancellable *cancellable,
GError **error)
{
char *ret = NULL;
GFileAttributeInfoList *attributes = NULL, *namespaces = NULL;
GString *s = NULL;
gboolean first;
int i;
gboolean copy_all_attributes;
gboolean skip_perms;
gboolean skip_modified_time;
g_return_val_if_fail (G_IS_FILE (file), NULL);
g_return_val_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable), NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
copy_all_attributes = flags & G_FILE_COPY_ALL_METADATA;
skip_perms = (flags & G_FILE_COPY_TARGET_DEFAULT_PERMS) != 0;
skip_modified_time = (flags & G_FILE_COPY_TARGET_DEFAULT_MODIFIED_TIME) != 0;
/* Ignore errors here, if the target supports no attributes there is
* nothing to copy. We still honor the cancellable though.
*/
attributes = g_file_query_settable_attributes (file, cancellable, NULL);
if (g_cancellable_set_error_if_cancelled (cancellable, error))
goto out;
namespaces = g_file_query_writable_namespaces (file, cancellable, NULL);
if (g_cancellable_set_error_if_cancelled (cancellable, error))
goto out;
if (attributes == NULL && namespaces == NULL)
goto out;
first = TRUE;
s = g_string_new ("");
/* Always query the source file size, even though we can’t set that on the
* destination. This is useful for the copy functions. */
first = FALSE;
g_string_append (s, G_FILE_ATTRIBUTE_STANDARD_SIZE);
if (attributes)
{
for (i = 0; i < attributes->n_infos; i++)
{
if (should_copy (&attributes->infos[i], copy_all_attributes, skip_perms, skip_modified_time))
{
if (first)
first = FALSE;
else
g_string_append_c (s, ',');
g_string_append (s, attributes->infos[i].name);
}
}
}
if (namespaces)
{
for (i = 0; i < namespaces->n_infos; i++)
{
if (should_copy (&namespaces->infos[i], copy_all_attributes, FALSE, FALSE))
{
if (first)
first = FALSE;
else
g_string_append_c (s, ',');
g_string_append (s, namespaces->infos[i].name);
g_string_append (s, "::*");
}
}
}
ret = g_string_free (s, FALSE);
s = NULL;
out:
if (s)
g_string_free (s, TRUE);
if (attributes)
g_file_attribute_info_list_unref (attributes);
if (namespaces)
g_file_attribute_info_list_unref (namespaces);
return ret;
}
/**
* g_file_copy_attributes:
* @source: a #GFile with attributes
* @destination: a #GFile to copy attributes to
* @flags: a set of #GFileCopyFlags
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @error: a #GError, %NULL to ignore
*
* Copies the file attributes from @source to @destination.
*
* Normally only a subset of the file attributes are copied,
* those that are copies in a normal file copy operation
* (which for instance does not include e.g. owner). However
* if %G_FILE_COPY_ALL_METADATA is specified in @flags, then
* all the metadata that is possible to copy is copied. This
* is useful when implementing move by copy + delete source.
*
* Returns: %TRUE if the attributes were copied successfully,
* %FALSE otherwise.
*/
gboolean
g_file_copy_attributes (GFile *source,
GFile *destination,
GFileCopyFlags flags,
GCancellable *cancellable,
GError **error)
{
char *attrs_to_read;
gboolean res;
GFileInfo *info;
gboolean source_nofollow_symlinks;
attrs_to_read = g_file_build_attribute_list_for_copy (destination, flags,
cancellable, error);
if (!attrs_to_read)
return FALSE;
source_nofollow_symlinks = flags & G_FILE_COPY_NOFOLLOW_SYMLINKS;
/* Ignore errors here, if we can't read some info (e.g. if it doesn't exist)
* we just don't copy it.
*/
info = g_file_query_info (source, attrs_to_read,
source_nofollow_symlinks ? G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS:0,
cancellable,
NULL);
g_free (attrs_to_read);
res = TRUE;
if (info)
{
res = g_file_set_attributes_from_info (destination,
info,
G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS,
cancellable,
error);
g_object_unref (info);
}
return res;
}
/* 256k minus malloc overhead */
#define STREAM_BUFFER_SIZE (1024*256 - 2 *sizeof(gpointer))
static gboolean
copy_stream_with_progress (GInputStream *in,
GOutputStream *out,
GFile *source,
GCancellable *cancellable,
GFileProgressCallback progress_callback,
gpointer progress_callback_data,
GError **error)
{
gssize n_read;
gsize n_written;
goffset current_size;
char *buffer;
gboolean res;
goffset total_size;
GFileInfo *info;
total_size = -1;
/* avoid performance impact of querying total size when it's not needed */
if (progress_callback)
{
info = g_file_input_stream_query_info (G_FILE_INPUT_STREAM (in),
G_FILE_ATTRIBUTE_STANDARD_SIZE,
cancellable, NULL);
if (info)
{
if (g_file_info_has_attribute (info, G_FILE_ATTRIBUTE_STANDARD_SIZE))
total_size = g_file_info_get_size (info);
g_object_unref (info);
}
if (total_size == -1)
{
info = g_file_query_info (source,
G_FILE_ATTRIBUTE_STANDARD_SIZE,
G_FILE_QUERY_INFO_NONE,
cancellable, NULL);
if (info)
{
if (g_file_info_has_attribute (info, G_FILE_ATTRIBUTE_STANDARD_SIZE))
total_size = g_file_info_get_size (info);
g_object_unref (info);
}
}
}
if (total_size == -1)
total_size = 0;
buffer = g_malloc0 (STREAM_BUFFER_SIZE);
current_size = 0;
res = TRUE;
while (TRUE)
{
n_read = g_input_stream_read (in, buffer, STREAM_BUFFER_SIZE, cancellable, error);
if (n_read == -1)
{
res = FALSE;
break;
}
if (n_read == 0)
break;
current_size += n_read;
res = g_output_stream_write_all (out, buffer, n_read, &n_written, cancellable, error);
if (!res)
break;
if (progress_callback)
progress_callback (current_size, total_size, progress_callback_data);
}
g_free (buffer);
/* Make sure we send full copied size */
if (progress_callback)
progress_callback (current_size, total_size, progress_callback_data);
return res;
}
#ifdef HAVE_COPY_FILE_RANGE
static gboolean
do_copy_file_range (int fd_in,
loff_t *off_in,
int fd_out,
loff_t *off_out,
size_t len,
size_t *bytes_transferred,
GError **error)
{
ssize_t result;
do
{
result = copy_file_range (fd_in, off_in, fd_out, off_out, len, 0);
if (result == -1)
{
int errsv = errno;
if (errsv == EINTR)
{
continue;
}
else if (errsv == ENOSYS || errsv == EINVAL || errsv == EOPNOTSUPP || errsv == EXDEV)
{
g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
_("Copy file range not supported"));
}
else
{
g_set_error (error, G_IO_ERROR,
g_io_error_from_errno (errsv),
_("Error splicing file: %s"),
g_strerror (errsv));
}
return FALSE;
}
} while (result == -1);
g_assert (result >= 0);
*bytes_transferred = result;
return TRUE;
}
static gboolean
copy_file_range_with_progress (GInputStream *in,
GFileInfo *in_info,
GOutputStream *out,
GCancellable *cancellable,
GFileProgressCallback progress_callback,
gpointer progress_callback_data,
GError **error)
{
goffset total_size, last_notified_size;
size_t copy_len;
loff_t offset_in;
loff_t offset_out;
int fd_in, fd_out;
fd_in = g_file_descriptor_based_get_fd (G_FILE_DESCRIPTOR_BASED (in));
fd_out = g_file_descriptor_based_get_fd (G_FILE_DESCRIPTOR_BASED (out));
g_assert (g_file_info_has_attribute (in_info, G_FILE_ATTRIBUTE_STANDARD_SIZE));
total_size = g_file_info_get_size (in_info);
/* Bail out if the reported size of the file is zero. It might be zero, but it
* might also just be a kernel file in /proc. They report their file size as
* zero, but then have data when you start reading. Go to the fallback code
* path for those. */
if (total_size == 0)
{
g_set_error (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
_("Copy file range not supported"));
return FALSE;
}
offset_in = offset_out = 0;
copy_len = total_size;
last_notified_size = 0;
/* Call copy_file_range() in a loop until the whole contents are copied. For
* smaller files, this loop will iterate only once. For larger files, the
* kernel (at least, kernel 6.1.6) will return after 2GB anyway, so that gives
* us more loop iterations and more progress reporting. */
while (copy_len > 0)
{
size_t n_copied;
if (g_cancellable_set_error_if_cancelled (cancellable, error) ||
!do_copy_file_range (fd_in, &offset_in, fd_out, &offset_out, copy_len, &n_copied, error))
return FALSE;
if (n_copied == 0)
break;
g_assert (n_copied <= copy_len);
copy_len -= n_copied;
if (progress_callback)
{
progress_callback (offset_in, total_size, progress_callback_data);
last_notified_size = total_size;
}
}
/* Make sure we send full copied size */
if (progress_callback && last_notified_size != total_size)
progress_callback (offset_in, total_size, progress_callback_data);
return TRUE;
}
#endif /* HAVE_COPY_FILE_RANGE */
#ifdef HAVE_SPLICE
static gboolean
do_splice (int fd_in,
loff_t *off_in,
int fd_out,
loff_t *off_out,
size_t len,
long *bytes_transferd,
GError **error)
{
long result;
retry:
result = splice (fd_in, off_in, fd_out, off_out, len, SPLICE_F_MORE);
if (result == -1)
{
int errsv = errno;
if (errsv == EINTR)
goto retry;
else if (errsv == ENOSYS || errsv == EINVAL || errsv == EOPNOTSUPP)
g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
_("Splice not supported"));
else
g_set_error (error, G_IO_ERROR,
g_io_error_from_errno (errsv),
_("Error splicing file: %s"),
g_strerror (errsv));
return FALSE;
}
*bytes_transferd = result;
return TRUE;
}
static gboolean
splice_stream_with_progress (GInputStream *in,
GFileInfo *in_info,
GOutputStream *out,
GCancellable *cancellable,
GFileProgressCallback progress_callback,
gpointer progress_callback_data,
GError **error)
{
int buffer[2] = { -1, -1 };
int buffer_size;
gboolean res;
goffset total_size;
loff_t offset_in;
loff_t offset_out;
int fd_in, fd_out;
fd_in = g_file_descriptor_based_get_fd (G_FILE_DESCRIPTOR_BASED (in));
fd_out = g_file_descriptor_based_get_fd (G_FILE_DESCRIPTOR_BASED (out));
if (!g_unix_open_pipe (buffer, O_CLOEXEC, error))
return FALSE;
/* Try a 1MiB buffer for improved throughput. If that fails, use the default
* pipe size. See: https://bugzilla.gnome.org/791457 */
buffer_size = fcntl (buffer[1], F_SETPIPE_SZ, 1024 * 1024);
if (buffer_size <= 0)
{
buffer_size = fcntl (buffer[1], F_GETPIPE_SZ);
if (buffer_size <= 0)
{
/* If #F_GETPIPE_SZ isn’t available, assume we’re on Linux < 2.6.35,
* but ≥ 2.6.11, meaning the pipe capacity is 64KiB. Ignore the
* possibility of running on Linux < 2.6.11 (where the capacity was
* the system page size, typically 4KiB) because it’s ancient.
* See pipe(7). */
buffer_size = 1024 * 64;
}
}
g_assert (buffer_size > 0);
total_size = -1;
/* avoid performance impact of querying total size when it's not needed */
if (progress_callback)
{
g_assert (g_file_info_has_attribute (in_info, G_FILE_ATTRIBUTE_STANDARD_SIZE));
total_size = g_file_info_get_size (in_info);
}
if (total_size == -1)
total_size = 0;
offset_in = offset_out = 0;
res = FALSE;
while (TRUE)
{
long n_read;
long n_written;
if (g_cancellable_set_error_if_cancelled (cancellable, error))
break;
if (!do_splice (fd_in, &offset_in, buffer[1], NULL, buffer_size, &n_read, error))
break;
if (n_read == 0)
{
res = TRUE;
break;
}
while (n_read > 0)
{
if (g_cancellable_set_error_if_cancelled (cancellable, error))
goto out;
if (!do_splice (buffer[0], NULL, fd_out, &offset_out, n_read, &n_written, error))
goto out;
n_read -= n_written;
}
if (progress_callback)
progress_callback (offset_in, total_size, progress_callback_data);
}
/* Make sure we send full copied size */
if (progress_callback)
progress_callback (offset_in, total_size, progress_callback_data);
if (!g_close (buffer[0], error))
goto out;
buffer[0] = -1;
if (!g_close (buffer[1], error))
goto out;
buffer[1] = -1;
out:
if (buffer[0] != -1)
(void) g_close (buffer[0], NULL);
if (buffer[1] != -1)
(void) g_close (buffer[1], NULL);
return res;
}
#endif
#ifdef __linux__
static gboolean
btrfs_reflink_with_progress (GInputStream *in,
GFileInfo *in_info,
GOutputStream *out,
GFileInfo *info,
GCancellable *cancellable,
GFileProgressCallback progress_callback,
gpointer progress_callback_data,
GError **error)
{
goffset total_size;
int fd_in, fd_out;
int ret, errsv;
fd_in = g_file_descriptor_based_get_fd (G_FILE_DESCRIPTOR_BASED (in));
fd_out = g_file_descriptor_based_get_fd (G_FILE_DESCRIPTOR_BASED (out));
total_size = -1;
/* avoid performance impact of querying total size when it's not needed */
if (progress_callback)
{
g_assert (g_file_info_has_attribute (in_info, G_FILE_ATTRIBUTE_STANDARD_SIZE));
total_size = g_file_info_get_size (in_info);
}
if (total_size == -1)
total_size = 0;
/* Btrfs clone ioctl properties:
* - Works at the inode level
* - Doesn't work with directories
* - Always follows symlinks (source and destination)
*
* By the time we get here, *in and *out are both regular files */
ret = ioctl (fd_out, BTRFS_IOC_CLONE, fd_in);
errsv = errno;
if (ret < 0)
{
if (errsv == EXDEV)
g_set_error_literal (error, G_IO_ERROR,
G_IO_ERROR_NOT_SUPPORTED,
_("Copy (reflink/clone) between mounts is not supported"));
else if (errsv == EINVAL)
g_set_error_literal (error, G_IO_ERROR,
G_IO_ERROR_NOT_SUPPORTED,
_("Copy (reflink/clone) is not supported or invalid"));
else
/* Most probably something odd happened; retry with fallback */
g_set_error_literal (error, G_IO_ERROR,
G_IO_ERROR_NOT_SUPPORTED,
_("Copy (reflink/clone) is not supported or didn’t work"));
/* We retry with fallback for all error cases because Btrfs is currently
* unstable, and so we can't trust it to do clone properly.
* In addition, any hard errors here would cause the same failure in the
* fallback manual copy as well. */
return FALSE;
}
/* Make sure we send full copied size */
if (progress_callback)
progress_callback (total_size, total_size, progress_callback_data);
return TRUE;
}
#endif
static gboolean
file_copy_fallback (GFile *source,
GFile *destination,
GFileCopyFlags flags,
GCancellable *cancellable,
GFileProgressCallback progress_callback,
gpointer progress_callback_data,
GError **error)
{
gboolean ret = FALSE;
GFileInputStream *file_in = NULL;
GInputStream *in = NULL;
GOutputStream *out = NULL;
GFileInfo *info = NULL;
const char *target;
char *attrs_to_read;
gboolean do_set_attributes = FALSE;
GFileCreateFlags create_flags;
GError *tmp_error = NULL;
/* need to know the file type */
info = g_file_query_info (source,
G_FILE_ATTRIBUTE_STANDARD_TYPE "," G_FILE_ATTRIBUTE_STANDARD_SYMLINK_TARGET,
G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS,
cancellable,
error);
if (!info)
goto out;
if (!g_file_info_has_attribute (info, G_FILE_ATTRIBUTE_STANDARD_TYPE))
{
g_set_error (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
_("Cannot retrieve attribute %s"), G_FILE_ATTRIBUTE_STANDARD_TYPE);
goto out;
}
/* Maybe copy the symlink? */
if ((flags & G_FILE_COPY_NOFOLLOW_SYMLINKS) &&
g_file_info_get_file_type (info) == G_FILE_TYPE_SYMBOLIC_LINK)
{
if (!g_file_info_has_attribute (info, G_FILE_ATTRIBUTE_STANDARD_SYMLINK_TARGET))
{
g_set_error (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
_("Cannot retrieve attribute %s"), G_FILE_ATTRIBUTE_STANDARD_SYMLINK_TARGET);
goto out;
}
target = g_file_info_get_symlink_target (info);
if (target)
{
if (!copy_symlink (destination, flags, cancellable, target, error))
goto out;
ret = TRUE;
goto out;
}
/* ... else fall back on a regular file copy */
}
/* Handle "special" files (pipes, device nodes, ...)? */
else if (g_file_info_get_file_type (info) == G_FILE_TYPE_SPECIAL)
{
/* FIXME: could try to recreate device nodes and others? */
g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
_("Can’t copy special file"));
goto out;
}
/* Everything else should just fall back on a regular copy. */
file_in = open_source_for_copy (source, destination, flags, cancellable, error);
if (!file_in)
goto out;
in = G_INPUT_STREAM (file_in);
attrs_to_read = g_file_build_attribute_list_for_copy (destination, flags,
cancellable, error);
if (!attrs_to_read)
goto out;
/* Ok, ditch the previous lightweight info (on Unix we just
* called lstat()); at this point we gather all the information
* we need about the source from the opened file descriptor.
*/
g_object_unref (info);
info = g_file_input_stream_query_info (file_in, attrs_to_read,
cancellable, &tmp_error);
if (!info)
{
/* Not all gvfs backends implement query_info_on_read(), we
* can just fall back to the pathname again.
* https://bugzilla.gnome.org/706254
*/
if (g_error_matches (tmp_error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED))
{
g_clear_error (&tmp_error);
info = g_file_query_info (source, attrs_to_read, G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS,
cancellable, error);
}
else
{
g_free (attrs_to_read);
g_propagate_error (error, tmp_error);
goto out;
}
}
g_free (attrs_to_read);
if (!info)
goto out;
do_set_attributes = TRUE;
/* In the local file path, we pass down the source info which
* includes things like unix::mode, to ensure that the target file
* is not created with different permissions from the source file.
*
* If a future API like g_file_replace_with_info() is added, switch
* this code to use that.
*
* Use %G_FILE_CREATE_PRIVATE unless
* - we were told to create the file with default permissions (i.e. the
* process’ umask),
* - or if the source file is on a file system which doesn’t support
* `unix::mode` (in which case it probably also makes sense to create the
* destination with default permissions because the source cannot be
* private),
* - or if the destination file is a `GLocalFile`, in which case we can
* directly open() it with the permissions from the source file.
*/
create_flags = G_FILE_CREATE_NONE;
if (!(flags & G_FILE_COPY_TARGET_DEFAULT_PERMS) &&
g_file_info_has_attribute (info, G_FILE_ATTRIBUTE_UNIX_MODE) &&
!G_IS_LOCAL_FILE (destination))
create_flags |= G_FILE_CREATE_PRIVATE;
if (flags & G_FILE_COPY_OVERWRITE)
create_flags |= G_FILE_CREATE_REPLACE_DESTINATION;
if (G_IS_LOCAL_FILE (destination))
{
if (flags & G_FILE_COPY_OVERWRITE)
out = (GOutputStream*)_g_local_file_output_stream_replace (_g_local_file_get_filename (G_LOCAL_FILE (destination)),
FALSE, NULL,
flags & G_FILE_COPY_BACKUP,
create_flags,
(flags & G_FILE_COPY_TARGET_DEFAULT_PERMS) ? NULL : info,
cancellable, error);
else
out = (GOutputStream*)_g_local_file_output_stream_create (_g_local_file_get_filename (G_LOCAL_FILE (destination)),
FALSE, create_flags,
(flags & G_FILE_COPY_TARGET_DEFAULT_PERMS) ? NULL : info,
cancellable, error);
}
else if (flags & G_FILE_COPY_OVERWRITE)
{
out = (GOutputStream *)g_file_replace (destination,
NULL,
flags & G_FILE_COPY_BACKUP,
create_flags,
cancellable, error);
}
else
{
out = (GOutputStream *)g_file_create (destination, create_flags, cancellable, error);
}
if (!out)
goto out;
#ifdef __linux__
if (G_IS_FILE_DESCRIPTOR_BASED (in) && G_IS_FILE_DESCRIPTOR_BASED (out))
{
GError *reflink_err = NULL;
if (!btrfs_reflink_with_progress (in, info, out, info, cancellable,
progress_callback, progress_callback_data,
&reflink_err))
{
if (g_error_matches (reflink_err, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED))
{
g_clear_error (&reflink_err);
}
else
{
g_propagate_error (error, reflink_err);
goto out;
}
}
else
{
ret = TRUE;
goto out;
}
}
#endif
#ifdef HAVE_COPY_FILE_RANGE
if (G_IS_FILE_DESCRIPTOR_BASED (in) && G_IS_FILE_DESCRIPTOR_BASED (out))
{
GError *copy_file_range_error = NULL;
if (copy_file_range_with_progress (in, info, out, cancellable,
progress_callback, progress_callback_data,
&copy_file_range_error))
{
ret = TRUE;
goto out;
}
else if (!g_error_matches (copy_file_range_error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED))
{
g_propagate_error (error, g_steal_pointer (&copy_file_range_error));
goto out;
}
else
{
g_clear_error (&copy_file_range_error);
}
}
#endif /* HAVE_COPY_FILE_RANGE */
#ifdef HAVE_SPLICE
if (G_IS_FILE_DESCRIPTOR_BASED (in) && G_IS_FILE_DESCRIPTOR_BASED (out))
{
GError *splice_err = NULL;
if (!splice_stream_with_progress (in, info, out, cancellable,
progress_callback, progress_callback_data,
&splice_err))
{
if (g_error_matches (splice_err, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED))
{
g_clear_error (&splice_err);
}
else
{
g_propagate_error (error, splice_err);
goto out;
}
}
else
{
ret = TRUE;
goto out;
}
}
#endif
/* A plain read/write loop */
if (!copy_stream_with_progress (in, out, source, cancellable,
progress_callback, progress_callback_data,
error))
goto out;
ret = TRUE;
out:
if (in)
{
/* Don't care about errors in source here */
(void) g_input_stream_close (in, cancellable, NULL);
g_object_unref (in);
}
if (out)
{
/* But write errors on close are bad! */
if (!g_output_stream_close (out, cancellable, ret ? error : NULL))
ret = FALSE;
g_object_unref (out);
}
/* Ignore errors here. Failure to copy metadata is not a hard error */
/* TODO: set these attributes /before/ we do the rename() on Unix */
if (ret && do_set_attributes)
{
g_file_set_attributes_from_info (destination,
info,
G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS,
cancellable,
NULL);
}
g_clear_object (&info);
return ret;
}
/**
* g_file_copy:
* @source: input #GFile
* @destination: destination #GFile
* @flags: set of #GFileCopyFlags
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @progress_callback: (nullable) (scope call) (closure progress_callback_data): function to callback with
* progress information, or %NULL if progress information is not needed
* @progress_callback_data: user data to pass to @progress_callback
* @error: #GError to set on error, or %NULL
*
* Copies the file @source to the location specified by @destination.
* Can not handle recursive copies of directories.
*
* If the flag %G_FILE_COPY_OVERWRITE is specified an already
* existing @destination file is overwritten.
*
* If the flag %G_FILE_COPY_NOFOLLOW_SYMLINKS is specified then symlinks
* will be copied as symlinks, otherwise the target of the
* @source symlink will be copied.
*
* If the flag %G_FILE_COPY_ALL_METADATA is specified then all the metadata
* that is possible to copy is copied, not just the default subset (which,
* for instance, does not include the owner, see #GFileInfo).
*
* If @cancellable is not %NULL, then the operation can be cancelled by
* triggering the cancellable object from another thread. If the operation
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
*
* If @progress_callback is not %NULL, then the operation can be monitored
* by setting this to a #GFileProgressCallback function.
* @progress_callback_data will be passed to this function. It is guaranteed
* that this callback will be called after all data has been transferred with
* the total number of bytes copied during the operation.
*
* If the @source file does not exist, then the %G_IO_ERROR_NOT_FOUND error
* is returned, independent on the status of the @destination.
*
* If %G_FILE_COPY_OVERWRITE is not specified and the target exists, then
* the error %G_IO_ERROR_EXISTS is returned.
*
* If trying to overwrite a file over a directory, the %G_IO_ERROR_IS_DIRECTORY
* error is returned. If trying to overwrite a directory with a directory the
* %G_IO_ERROR_WOULD_MERGE error is returned.
*
* If the source is a directory and the target does not exist, or
* %G_FILE_COPY_OVERWRITE is specified and the target is a file, then the
* %G_IO_ERROR_WOULD_RECURSE error is returned.
*
* If you are interested in copying the #GFile object itself (not the on-disk
* file), see g_file_dup().
*
* Returns: %TRUE on success, %FALSE otherwise.
*/
gboolean
g_file_copy (GFile *source,
GFile *destination,
GFileCopyFlags flags,
GCancellable *cancellable,
GFileProgressCallback progress_callback,
gpointer progress_callback_data,
GError **error)
{
GFileIface *iface;
GError *my_error;
gboolean res;
g_return_val_if_fail (G_IS_FILE (source), FALSE);
g_return_val_if_fail (G_IS_FILE (destination), FALSE);
if (g_cancellable_set_error_if_cancelled (cancellable, error))
return FALSE;
iface = G_FILE_GET_IFACE (destination);
if (iface->copy)
{
my_error = NULL;
res = (* iface->copy) (source, destination,
flags, cancellable,
progress_callback, progress_callback_data,
&my_error);
if (res)
return TRUE;
if (my_error->domain != G_IO_ERROR || my_error->code != G_IO_ERROR_NOT_SUPPORTED)
{
g_propagate_error (error, my_error);
return FALSE;
}
else
g_clear_error (&my_error);
}
/* If the types are different, and the destination method failed
* also try the source method
*/
if (G_OBJECT_TYPE (source) != G_OBJECT_TYPE (destination))
{
iface = G_FILE_GET_IFACE (source);
if (iface->copy)
{
my_error = NULL;
res = (* iface->copy) (source, destination,
flags, cancellable,
progress_callback, progress_callback_data,
&my_error);
if (res)
return TRUE;
if (my_error->domain != G_IO_ERROR || my_error->code != G_IO_ERROR_NOT_SUPPORTED)
{
g_propagate_error (error, my_error);
return FALSE;
}
else
g_clear_error (&my_error);
}
}
return file_copy_fallback (source, destination, flags, cancellable,
progress_callback, progress_callback_data,
error);
}
/**
* g_file_copy_async:
* @source: input #GFile
* @destination: destination #GFile
* @flags: set of #GFileCopyFlags
* @io_priority: the [I/O priority](iface.AsyncResult.html#io-priority) of the request
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @progress_callback: (nullable) (scope notified) (closure progress_callback_data):
* function to callback with progress information, or %NULL if
* progress information is not needed
* @progress_callback_data: user data to pass to @progress_callback
* @callback: (scope async) (closure user_data): a #GAsyncReadyCallback
* to call when the request is satisfied
* @user_data: the data to pass to callback
*
* Copies the file @source to the location specified by @destination
* asynchronously. For details of the behaviour, see g_file_copy().
*
* If @progress_callback is not %NULL, then that function that will be called
* just like in g_file_copy(). The callback will run in the default main context
* of the thread calling g_file_copy_async() — the same context as @callback is
* run in.
*
* When the operation is finished, @callback will be called. You can then call
* g_file_copy_finish() to get the result of the operation.
*/
void
g_file_copy_async (GFile *source,
GFile *destination,
GFileCopyFlags flags,
int io_priority,
GCancellable *cancellable,
GFileProgressCallback progress_callback,
gpointer progress_callback_data,
GAsyncReadyCallback callback,
gpointer user_data)
{
GFileIface *iface;
g_return_if_fail (G_IS_FILE (source));
g_return_if_fail (G_IS_FILE (destination));
iface = G_FILE_GET_IFACE (source);
(* iface->copy_async) (source,
destination,
flags,
io_priority,
cancellable,
progress_callback,
progress_callback_data,
callback,
user_data);
}
typedef struct _CopyAsyncClosuresData
{
GClosure *progress_callback_closure;
GClosure *ready_callback_closure;
} CopyAsyncClosuresData;
static CopyAsyncClosuresData *
copy_async_closures_data_new (GClosure *progress_callback_closure,
GClosure *ready_callback_closure)
{
CopyAsyncClosuresData *data;
data = g_new0 (CopyAsyncClosuresData, 1);
if (progress_callback_closure != NULL)
{
data->progress_callback_closure = g_closure_ref (progress_callback_closure);
g_closure_sink (progress_callback_closure);
if (G_CLOSURE_NEEDS_MARSHAL (progress_callback_closure))
g_closure_set_marshal (progress_callback_closure, g_cclosure_marshal_generic);
}
data->ready_callback_closure = g_closure_ref (ready_callback_closure);
g_closure_sink (ready_callback_closure);
if (G_CLOSURE_NEEDS_MARSHAL (ready_callback_closure))
g_closure_set_marshal (ready_callback_closure, g_cclosure_marshal_generic);
return data;
}
static void
copy_async_closures_data_free (CopyAsyncClosuresData *data)
{
if (data->progress_callback_closure != NULL)
g_closure_unref (data->progress_callback_closure);
g_closure_unref (data->ready_callback_closure);
g_free (data);
}
static void
copy_async_invoke_progress (goffset current_num_bytes,
goffset total_num_bytes,
void *user_data)
{
CopyAsyncClosuresData *data = (CopyAsyncClosuresData *) user_data;
GValue params[2] = { G_VALUE_INIT, G_VALUE_INIT };
/* goffset is 64-bits even on 32-bits platforms */
g_value_init (&params[0], G_TYPE_INT64);
g_value_set_int64 (&params[0], current_num_bytes);
g_value_init (&params[1], G_TYPE_INT64);
g_value_set_int64 (&params[1], total_num_bytes);
g_closure_invoke (data->progress_callback_closure, /* result = */ NULL, 2, params, /* hint = */ NULL);
g_value_unset (&params[0]);
g_value_unset (&params[1]);
}
static void
copy_async_invoke_ready (GObject *file,
GAsyncResult *result,
void *user_data)
{
CopyAsyncClosuresData *data = (CopyAsyncClosuresData *) user_data;
GValue params[2] = { G_VALUE_INIT, G_VALUE_INIT };
g_value_init (&params[0], G_TYPE_FILE);
g_value_set_object (&params[0], file);
g_value_init (&params[1], G_TYPE_ASYNC_RESULT);
g_value_set_object (&params[1], result);
g_closure_invoke (data->ready_callback_closure, /* result = */ NULL, 2, params, /* hint = */ NULL);
copy_async_closures_data_free (data);
g_value_unset (&params[0]);
g_value_unset (&params[1]);
}
/**
* g_file_copy_async_with_closures: (rename-to g_file_copy_async) (finish-func copy_finish):
* @source: input [type@Gio.File]
* @destination: destination [type@Gio.File]
* @flags: set of [flags@Gio.FileCopyFlags]
* @io_priority: the [I/O priority](iface.AsyncResult.html#io-priority) of the request
* @cancellable: (nullable): optional [class@Gio.Cancellable] object,
* `NULL` to ignore
* @progress_callback_closure: (nullable): [type@GObject.Closure] to invoke with progress
* information, or `NULL` if progress information is not needed
* @ready_callback_closure: (not nullable): [type@GObject.Closure] to invoke when the request is satisfied
*
* Version of [method@Gio.File.copy_async] using closures instead of callbacks for
* easier binding in other languages.
*
* Since: 2.82
*/
void
g_file_copy_async_with_closures (GFile *source,
GFile *destination,
GFileCopyFlags flags,
int io_priority,
GCancellable *cancellable,
GClosure *progress_callback_closure,
GClosure *ready_callback_closure)
{
CopyAsyncClosuresData *data;
/* freed in copy_async_invoke_ready */
data = copy_async_closures_data_new (progress_callback_closure, ready_callback_closure);
g_file_copy_async (source, destination, flags, io_priority, cancellable,
progress_callback_closure == NULL ? NULL : copy_async_invoke_progress, data,
copy_async_invoke_ready, data);
}
/**
* g_file_copy_finish:
* @file: input #GFile
* @res: a #GAsyncResult
* @error: a #GError, or %NULL
*
* Finishes copying the file started with g_file_copy_async().
*
* Returns: a %TRUE on success, %FALSE on error.
*/
gboolean
g_file_copy_finish (GFile *file,
GAsyncResult *res,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), FALSE);
g_return_val_if_fail (G_IS_ASYNC_RESULT (res), FALSE);
if (g_async_result_legacy_propagate_error (res, error))
return FALSE;
iface = G_FILE_GET_IFACE (file);
return (* iface->copy_finish) (file, res, error);
}
/**
* g_file_move:
* @source: #GFile pointing to the source location
* @destination: #GFile pointing to the destination location
* @flags: set of #GFileCopyFlags
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @progress_callback: (nullable) (scope call) (closure progress_callback_data): #GFileProgressCallback
* function for updates
* @progress_callback_data: gpointer to user data for
* the callback function
* @error: #GError for returning error conditions, or %NULL
*
* Tries to move the file or directory @source to the location specified
* by @destination. If native move operations are supported then this is
* used, otherwise a copy + delete fallback is used. The native
* implementation may support moving directories (for instance on moves
* inside the same filesystem), but the fallback code does not.
*
* If the flag %G_FILE_COPY_OVERWRITE is specified an already
* existing @destination file is overwritten.
*
* If @cancellable is not %NULL, then the operation can be cancelled by
* triggering the cancellable object from another thread. If the operation
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
*
* If @progress_callback is not %NULL, then the operation can be monitored
* by setting this to a #GFileProgressCallback function.
* @progress_callback_data will be passed to this function. It is
* guaranteed that this callback will be called after all data has been
* transferred with the total number of bytes copied during the operation.
*
* If the @source file does not exist, then the %G_IO_ERROR_NOT_FOUND
* error is returned, independent on the status of the @destination.
*
* If %G_FILE_COPY_OVERWRITE is not specified and the target exists,
* then the error %G_IO_ERROR_EXISTS is returned.
*
* If trying to overwrite a file over a directory, the %G_IO_ERROR_IS_DIRECTORY
* error is returned. If trying to overwrite a directory with a directory the
* %G_IO_ERROR_WOULD_MERGE error is returned.
*
* If the source is a directory and the target does not exist, or
* %G_FILE_COPY_OVERWRITE is specified and the target is a file, then
* the %G_IO_ERROR_WOULD_RECURSE error may be returned (if the native
* move operation isn't available).
*
* Returns: %TRUE on successful move, %FALSE otherwise.
*/
gboolean
g_file_move (GFile *source,
GFile *destination,
GFileCopyFlags flags,
GCancellable *cancellable,
GFileProgressCallback progress_callback,
gpointer progress_callback_data,
GError **error)
{
GFileIface *iface;
GError *my_error;
gboolean res;
g_return_val_if_fail (G_IS_FILE (source), FALSE);
g_return_val_if_fail (G_IS_FILE (destination), FALSE);
if (g_cancellable_set_error_if_cancelled (cancellable, error))
return FALSE;
iface = G_FILE_GET_IFACE (destination);
if (iface->move)
{
my_error = NULL;
res = (* iface->move) (source, destination,
flags, cancellable,
progress_callback, progress_callback_data,
&my_error);
if (res)
return TRUE;
if (my_error->domain != G_IO_ERROR || my_error->code != G_IO_ERROR_NOT_SUPPORTED)
{
g_propagate_error (error, my_error);
return FALSE;
}
else
g_clear_error (&my_error);
}
/* If the types are different, and the destination method failed
* also try the source method
*/
if (G_OBJECT_TYPE (source) != G_OBJECT_TYPE (destination))
{
iface = G_FILE_GET_IFACE (source);
if (iface->move)
{
my_error = NULL;
res = (* iface->move) (source, destination,
flags, cancellable,
progress_callback, progress_callback_data,
&my_error);
if (res)
return TRUE;
if (my_error->domain != G_IO_ERROR || my_error->code != G_IO_ERROR_NOT_SUPPORTED)
{
g_propagate_error (error, my_error);
return FALSE;
}
else
g_clear_error (&my_error);
}
}
if (flags & G_FILE_COPY_NO_FALLBACK_FOR_MOVE)
{
g_set_error_literal (error, G_IO_ERROR,
G_IO_ERROR_NOT_SUPPORTED,
_("Operation not supported"));
return FALSE;
}
flags |= G_FILE_COPY_ALL_METADATA | G_FILE_COPY_NOFOLLOW_SYMLINKS;
if (!g_file_copy (source, destination, flags, cancellable,
progress_callback, progress_callback_data,
error))
return FALSE;
return g_file_delete (source, cancellable, error);
}
/**
* g_file_move_async:
* @source: #GFile pointing to the source location
* @destination: #GFile pointing to the destination location
* @flags: set of #GFileCopyFlags
* @io_priority: the [I/O priority](iface.AsyncResult.html#io-priority) of the request
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @progress_callback: (nullable) (scope call) (closure progress_callback_data):
* #GFileProgressCallback function for updates
* @progress_callback_data: gpointer to user data for the callback function
* @callback: (scope async) (closure user_data): a #GAsyncReadyCallback
* to call when the request is satisfied
* @user_data: the data to pass to callback function
*
* Asynchronously moves a file @source to the location of @destination. For details of the behaviour, see g_file_move().
*
* If @progress_callback is not %NULL, then that function that will be called
* just like in g_file_move(). The callback will run in the default main context
* of the thread calling g_file_move_async() — the same context as @callback is
* run in.
*
* When the operation is finished, @callback will be called. You can then call
* g_file_move_finish() to get the result of the operation.
*
* Since: 2.72
*/
void
g_file_move_async (GFile *source,
GFile *destination,
GFileCopyFlags flags,
int io_priority,
GCancellable *cancellable,
GFileProgressCallback progress_callback,
gpointer progress_callback_data,
GAsyncReadyCallback callback,
gpointer user_data)
{
GFileIface *iface;
g_return_if_fail (G_IS_FILE (source));
g_return_if_fail (G_IS_FILE (destination));
g_return_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable));
iface = G_FILE_GET_IFACE (source);
(* iface->move_async) (source,
destination,
flags,
io_priority,
cancellable,
progress_callback,
progress_callback_data,
callback,
user_data);
}
/**
* g_file_move_async_with_closures: (rename-to g_file_move_async) (finish-func move_finish):
* @source: input [type@Gio.File]
* @destination: destination [type@Gio.File]
* @flags: set of [flags@Gio.FileCopyFlags]
* @io_priority: the [I/O priority](iface.AsyncResult.html#io-priority) of the request
* @cancellable: (nullable): optional [class@Gio.Cancellable] object,
* `NULL` to ignore
* @progress_callback_closure: (nullable): [type@GObject.Closure] to invoke with progress
* information, or `NULL` if progress information is not needed
* @ready_callback_closure: (not nullable): [type@GObject.Closure] to invoke when the request is satisfied
*
* Version of [method@Gio.File.move_async] using closures instead of callbacks for
* easier binding in other languages.
*
* Since: 2.82
*/
void
g_file_move_async_with_closures (GFile *source,
GFile *destination,
GFileCopyFlags flags,
int io_priority,
GCancellable *cancellable,
GClosure *progress_callback_closure,
GClosure *ready_callback_closure)
{
CopyAsyncClosuresData *data;
/* freed in copy_async_invoke_ready */
data = copy_async_closures_data_new (progress_callback_closure, ready_callback_closure);
g_file_move_async (source, destination, flags, io_priority, cancellable,
progress_callback_closure == NULL ? NULL : copy_async_invoke_progress, data,
copy_async_invoke_ready, data);
}
/**
* g_file_move_finish:
* @file: input source #GFile
* @result: a #GAsyncResult
* @error: a #GError, or %NULL
*
* Finishes an asynchronous file movement, started with
* g_file_move_async().
*
* Returns: %TRUE on successful file move, %FALSE otherwise.
*
* Since: 2.72
*/
gboolean
g_file_move_finish (GFile *file,
GAsyncResult *result,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), FALSE);
g_return_val_if_fail (G_IS_ASYNC_RESULT (result), FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
iface = G_FILE_GET_IFACE (file);
return (* iface->move_finish) (file, result, error);
}
/**
* g_file_make_directory:
* @file: input #GFile
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @error: a #GError, or %NULL
*
* Creates a directory. Note that this will only create a child directory
* of the immediate parent directory of the path or URI given by the #GFile.
* To recursively create directories, see g_file_make_directory_with_parents().
* This function will fail if the parent directory does not exist, setting
* @error to %G_IO_ERROR_NOT_FOUND. If the file system doesn't support
* creating directories, this function will fail, setting @error to
* %G_IO_ERROR_NOT_SUPPORTED.
*
* For a local #GFile the newly created directory will have the default
* (current) ownership and permissions of the current process.
*
* If @cancellable is not %NULL, then the operation can be cancelled by
* triggering the cancellable object from another thread. If the operation
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
*
* Returns: %TRUE on successful creation, %FALSE otherwise.
*/
gboolean
g_file_make_directory (GFile *file,
GCancellable *cancellable,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), FALSE);
if (g_cancellable_set_error_if_cancelled (cancellable, error))
return FALSE;
iface = G_FILE_GET_IFACE (file);
if (iface->make_directory == NULL)
{
g_set_error_literal (error, G_IO_ERROR,
G_IO_ERROR_NOT_SUPPORTED,
_("Operation not supported"));
return FALSE;
}
return (* iface->make_directory) (file, cancellable, error);
}
/**
* g_file_make_directory_async: (virtual make_directory_async)
* @file: input #GFile
* @io_priority: the [I/O priority](iface.AsyncResult.html#io-priority) of the request
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @callback: a #GAsyncReadyCallback to call
* when the request is satisfied
* @user_data: the data to pass to callback function
*
* Asynchronously creates a directory.
*
* Since: 2.38
*/
void
g_file_make_directory_async (GFile *file,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GFileIface *iface;
g_return_if_fail (G_IS_FILE (file));
iface = G_FILE_GET_IFACE (file);
(* iface->make_directory_async) (file,
io_priority,
cancellable,
callback,
user_data);
}
/**
* g_file_make_directory_finish: (virtual make_directory_finish)
* @file: input #GFile
* @result: a #GAsyncResult
* @error: a #GError, or %NULL
*
* Finishes an asynchronous directory creation, started with
* g_file_make_directory_async().
*
* Returns: %TRUE on successful directory creation, %FALSE otherwise.
* Since: 2.38
*/
gboolean
g_file_make_directory_finish (GFile *file,
GAsyncResult *result,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), FALSE);
g_return_val_if_fail (G_IS_ASYNC_RESULT (result), FALSE);
iface = G_FILE_GET_IFACE (file);
return (* iface->make_directory_finish) (file, result, error);
}
/**
* g_file_make_directory_with_parents:
* @file: input #GFile
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @error: a #GError, or %NULL
*
* Creates a directory and any parent directories that may not
* exist similar to 'mkdir -p'. If the file system does not support
* creating directories, this function will fail, setting @error to
* %G_IO_ERROR_NOT_SUPPORTED. If the directory itself already exists,
* this function will fail setting @error to %G_IO_ERROR_EXISTS, unlike
* the similar g_mkdir_with_parents().
*
* For a local #GFile the newly created directories will have the default
* (current) ownership and permissions of the current process.
*
* If @cancellable is not %NULL, then the operation can be cancelled by
* triggering the cancellable object from another thread. If the operation
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
*
* Returns: %TRUE if all directories have been successfully created, %FALSE
* otherwise.
*
* Since: 2.18
*/
gboolean
g_file_make_directory_with_parents (GFile *file,
GCancellable *cancellable,
GError **error)
{
GFile *work_file = NULL;
GList *list = NULL, *l;
GError *my_error = NULL;
g_return_val_if_fail (G_IS_FILE (file), FALSE);
if (g_cancellable_set_error_if_cancelled (cancellable, error))
return FALSE;
/* Try for the simple case of not having to create any parent
* directories. If any parent directory needs to be created, this
* call will fail with NOT_FOUND. If that happens, then that value of
* my_error persists into the while loop below.
*/
g_file_make_directory (file, cancellable, &my_error);
if (!g_error_matches (my_error, G_IO_ERROR, G_IO_ERROR_NOT_FOUND))
{
if (my_error)
g_propagate_error (error, my_error);
return my_error == NULL;
}
work_file = g_object_ref (file);
/* Creates the parent directories as needed. In case any particular
* creation operation fails for lack of other parent directories
* (NOT_FOUND), the directory is added to a list of directories to
* create later, and the value of my_error is retained until the next
* iteration of the loop. After the loop my_error should either be
* empty or contain a real failure condition.
*/
while (g_error_matches (my_error, G_IO_ERROR, G_IO_ERROR_NOT_FOUND))
{
GFile *parent_file;
parent_file = g_file_get_parent (work_file);
if (parent_file == NULL)
break;
g_clear_error (&my_error);
g_file_make_directory (parent_file, cancellable, &my_error);
/* Another process may have created the directory in between the
* G_IO_ERROR_NOT_FOUND and now
*/
if (g_error_matches (my_error, G_IO_ERROR, G_IO_ERROR_EXISTS))
g_clear_error (&my_error);
g_object_unref (work_file);
work_file = g_object_ref (parent_file);
if (g_error_matches (my_error, G_IO_ERROR, G_IO_ERROR_NOT_FOUND))
list = g_list_prepend (list, parent_file); /* Transfer ownership of ref */
else
g_object_unref (parent_file);
}
/* All directories should be able to be created now, so an error at
* this point means the whole operation must fail -- except an EXISTS
* error, which means that another process already created the
* directory in between the previous failure and now.
*/
for (l = list; my_error == NULL && l; l = l->next)
{
g_file_make_directory ((GFile *) l->data, cancellable, &my_error);
if (g_error_matches (my_error, G_IO_ERROR, G_IO_ERROR_EXISTS))
g_clear_error (&my_error);
}
if (work_file)
g_object_unref (work_file);
/* Clean up */
while (list != NULL)
{
g_object_unref ((GFile *) list->data);
list = g_list_remove (list, list->data);
}
/* At this point an error in my_error means a that something
* unexpected failed in either of the loops above, so the whole
* operation must fail.
*/
if (my_error != NULL)
{
g_propagate_error (error, my_error);
return FALSE;
}
return g_file_make_directory (file, cancellable, error);
}
/**
* g_file_make_symbolic_link:
* @file: a #GFile with the name of the symlink to create
* @symlink_value: (type filename): a string with the path for the target
* of the new symlink
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @error: a #GError
*
* Creates a symbolic link named @file which contains the string
* @symlink_value.
*
* If @cancellable is not %NULL, then the operation can be cancelled by
* triggering the cancellable object from another thread. If the operation
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
*
* Returns: %TRUE on the creation of a new symlink, %FALSE otherwise.
*/
gboolean
g_file_make_symbolic_link (GFile *file,
const char *symlink_value,
GCancellable *cancellable,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), FALSE);
g_return_val_if_fail (symlink_value != NULL, FALSE);
if (g_cancellable_set_error_if_cancelled (cancellable, error))
return FALSE;
if (*symlink_value == '\0')
{
g_set_error_literal (error, G_IO_ERROR,
G_IO_ERROR_INVALID_ARGUMENT,
_("Invalid symlink value given"));
return FALSE;
}
iface = G_FILE_GET_IFACE (file);
if (iface->make_symbolic_link == NULL)
{
g_set_error_literal (error, G_IO_ERROR,
G_IO_ERROR_NOT_SUPPORTED,
_("Symbolic links not supported"));
return FALSE;
}
return (* iface->make_symbolic_link) (file, symlink_value, cancellable, error);
}
static void
make_symbolic_link_async_thread (GTask *task,
gpointer object,
gpointer task_data,
GCancellable *cancellable)
{
const char *symlink_value = task_data;
GError *error = NULL;
if (g_file_make_symbolic_link (G_FILE (object), symlink_value, cancellable, &error))
g_task_return_boolean (task, TRUE);
else
g_task_return_error (task, g_steal_pointer (&error));
}
static void
g_file_real_make_symbolic_link_async (GFile *file,
const char *symlink_value,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GTask *task;
g_return_if_fail (G_IS_FILE (file));
g_return_if_fail (symlink_value != NULL);
g_return_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable));
task = g_task_new (file, cancellable, callback, user_data);
g_task_set_source_tag (task, g_file_real_make_symbolic_link_async);
g_task_set_task_data (task, g_strdup (symlink_value), g_free);
g_task_set_priority (task, io_priority);
g_task_run_in_thread (task, make_symbolic_link_async_thread);
g_object_unref (task);
}
/**
* g_file_make_symbolic_link_async: (virtual make_symbolic_link_async)
* @file: a #GFile with the name of the symlink to create
* @symlink_value: (type filename): a string with the path for the target
* of the new symlink
* @io_priority: the [I/O priority](iface.AsyncResult.html#io-priority) of the request
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @callback: a #GAsyncReadyCallback to call
* when the request is satisfied
* @user_data: the data to pass to callback function
*
* Asynchronously creates a symbolic link named @file which contains the
* string @symlink_value.
*
* Since: 2.74
*/
void
g_file_make_symbolic_link_async (GFile *file,
const char *symlink_value,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GFileIface *iface;
g_return_if_fail (G_IS_FILE (file));
g_return_if_fail (symlink_value != NULL);
g_return_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable));
iface = G_FILE_GET_IFACE (file);
/* Default implementation should always be provided by GFileIface */
g_assert (iface->make_symbolic_link_async != NULL);
(* iface->make_symbolic_link_async) (file, symlink_value, io_priority,
cancellable, callback, user_data);
}
static gboolean
g_file_real_make_symbolic_link_finish (GFile *file,
GAsyncResult *result,
GError **error)
{
g_return_val_if_fail (g_task_is_valid (result, file), FALSE);
return g_task_propagate_boolean (G_TASK (result), error);
}
/**
* g_file_make_symbolic_link_finish: (virtual make_symbolic_link_finish)
* @file: input #GFile
* @result: a #GAsyncResult
* @error: a #GError, or %NULL
*
* Finishes an asynchronous symbolic link creation, started with
* g_file_make_symbolic_link_async().
*
* Returns: %TRUE on successful directory creation, %FALSE otherwise.
* Since: 2.74
*/
gboolean
g_file_make_symbolic_link_finish (GFile *file,
GAsyncResult *result,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
iface = G_FILE_GET_IFACE (file);
/* Default implementation should always be provided by GFileIface */
g_assert (iface->make_symbolic_link_finish != NULL);
return (* iface->make_symbolic_link_finish) (file, result, error);
}
/**
* g_file_delete: (virtual delete_file)
* @file: input #GFile
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @error: a #GError, or %NULL
*
* Deletes a file. If the @file is a directory, it will only be
* deleted if it is empty. This has the same semantics as g_unlink().
*
* If @file doesn’t exist, %G_IO_ERROR_NOT_FOUND will be returned. This allows
* for deletion to be implemented avoiding
* [time-of-check to time-of-use races](https://en.wikipedia.org/wiki/Time-of-check_to_time-of-use):
* |[
* g_autoptr(GError) local_error = NULL;
* if (!g_file_delete (my_file, my_cancellable, &local_error) &&
* !g_error_matches (local_error, G_IO_ERROR, G_IO_ERROR_NOT_FOUND))
* {
* // deletion failed for some reason other than the file not existing:
* // so report the error
* g_warning ("Failed to delete %s: %s",
* g_file_peek_path (my_file), local_error->message);
* }
* ]|
*
* If @cancellable is not %NULL, then the operation can be cancelled by
* triggering the cancellable object from another thread. If the operation
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
*
* Returns: %TRUE if the file was deleted. %FALSE otherwise.
*/
gboolean
g_file_delete (GFile *file,
GCancellable *cancellable,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), FALSE);
if (g_cancellable_set_error_if_cancelled (cancellable, error))
return FALSE;
iface = G_FILE_GET_IFACE (file);
if (iface->delete_file == NULL)
{
g_set_error_literal (error, G_IO_ERROR,
G_IO_ERROR_NOT_SUPPORTED,
_("Operation not supported"));
return FALSE;
}
return (* iface->delete_file) (file, cancellable, error);
}
/**
* g_file_delete_async: (virtual delete_file_async)
* @file: input #GFile
* @io_priority: the [I/O priority](iface.AsyncResult.html#io-priority) of the request
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @callback: a #GAsyncReadyCallback to call
* when the request is satisfied
* @user_data: the data to pass to callback function
*
* Asynchronously delete a file. If the @file is a directory, it will
* only be deleted if it is empty. This has the same semantics as
* g_unlink().
*
* Since: 2.34
*/
void
g_file_delete_async (GFile *file,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GFileIface *iface;
g_return_if_fail (G_IS_FILE (file));
iface = G_FILE_GET_IFACE (file);
(* iface->delete_file_async) (file,
io_priority,
cancellable,
callback,
user_data);
}
/**
* g_file_delete_finish: (virtual delete_file_finish)
* @file: input #GFile
* @result: a #GAsyncResult
* @error: a #GError, or %NULL
*
* Finishes deleting a file started with g_file_delete_async().
*
* Returns: %TRUE if the file was deleted. %FALSE otherwise.
* Since: 2.34
**/
gboolean
g_file_delete_finish (GFile *file,
GAsyncResult *result,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), FALSE);
g_return_val_if_fail (G_IS_ASYNC_RESULT (result), FALSE);
if (g_async_result_legacy_propagate_error (result, error))
return FALSE;
iface = G_FILE_GET_IFACE (file);
return (* iface->delete_file_finish) (file, result, error);
}
/**
* g_file_trash: (virtual trash)
* @file: #GFile to send to trash
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @error: a #GError, or %NULL
*
* Sends @file to the "Trashcan", if possible. This is similar to
* deleting it, but the user can recover it before emptying the trashcan.
* Not all file systems support trashing, so this call can return the
* %G_IO_ERROR_NOT_SUPPORTED error. Since GLib 2.66, the `x-gvfs-notrash` unix
* mount option can be used to disable g_file_trash() support for certain
* mounts, the %G_IO_ERROR_NOT_SUPPORTED error will be returned in that case.
*
* If @cancellable is not %NULL, then the operation can be cancelled by
* triggering the cancellable object from another thread. If the operation
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
*
* Returns: %TRUE on successful trash, %FALSE otherwise.
*/
gboolean
g_file_trash (GFile *file,
GCancellable *cancellable,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), FALSE);
if (g_cancellable_set_error_if_cancelled (cancellable, error))
return FALSE;
iface = G_FILE_GET_IFACE (file);
if (iface->trash == NULL)
{
g_set_error_literal (error,
G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
_("Trash not supported"));
return FALSE;
}
return (* iface->trash) (file, cancellable, error);
}
/**
* g_file_trash_async: (virtual trash_async)
* @file: input #GFile
* @io_priority: the [I/O priority](iface.AsyncResult.html#io-priority) of the request
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @callback: a #GAsyncReadyCallback to call
* when the request is satisfied
* @user_data: the data to pass to callback function
*
* Asynchronously sends @file to the Trash location, if possible.
*
* Since: 2.38
*/
void
g_file_trash_async (GFile *file,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GFileIface *iface;
g_return_if_fail (G_IS_FILE (file));
iface = G_FILE_GET_IFACE (file);
(* iface->trash_async) (file,
io_priority,
cancellable,
callback,
user_data);
}
/**
* g_file_trash_finish: (virtual trash_finish)
* @file: input #GFile
* @result: a #GAsyncResult
* @error: a #GError, or %NULL
*
* Finishes an asynchronous file trashing operation, started with
* g_file_trash_async().
*
* Returns: %TRUE on successful trash, %FALSE otherwise.
* Since: 2.38
*/
gboolean
g_file_trash_finish (GFile *file,
GAsyncResult *result,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), FALSE);
g_return_val_if_fail (G_IS_ASYNC_RESULT (result), FALSE);
iface = G_FILE_GET_IFACE (file);
return (* iface->trash_finish) (file, result, error);
}
/**
* g_file_set_display_name:
* @file: input #GFile
* @display_name: a string
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @error: a #GError, or %NULL
*
* Renames @file to the specified display name.
*
* The display name is converted from UTF-8 to the correct encoding
* for the target filesystem if possible and the @file is renamed to this.
*
* If you want to implement a rename operation in the user interface the
* edit name (%G_FILE_ATTRIBUTE_STANDARD_EDIT_NAME) should be used as the
* initial value in the rename widget, and then the result after editing
* should be passed to g_file_set_display_name().
*
* On success the resulting converted filename is returned.
*
* If @cancellable is not %NULL, then the operation can be cancelled by
* triggering the cancellable object from another thread. If the operation
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
*
* Returns: (transfer full): a #GFile specifying what @file was renamed to,
* or %NULL if there was an error.
* Free the returned object with g_object_unref().
*/
GFile *
g_file_set_display_name (GFile *file,
const gchar *display_name,
GCancellable *cancellable,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), NULL);
g_return_val_if_fail (display_name != NULL, NULL);
if (strchr (display_name, G_DIR_SEPARATOR) != NULL)
{
g_set_error (error,
G_IO_ERROR,
G_IO_ERROR_INVALID_ARGUMENT,
_("File names cannot contain “%c”"), G_DIR_SEPARATOR);
return NULL;
}
if (g_cancellable_set_error_if_cancelled (cancellable, error))
return NULL;
iface = G_FILE_GET_IFACE (file);
return (* iface->set_display_name) (file, display_name, cancellable, error);
}
/**
* g_file_set_display_name_async:
* @file: input #GFile
* @display_name: a string
* @io_priority: the [I/O priority](iface.AsyncResult.html#io-priority) of the request
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @callback: (scope async) (closure user_data): a #GAsyncReadyCallback
* to call when the request is satisfied
* @user_data: the data to pass to callback function
*
* Asynchronously sets the display name for a given #GFile.
*
* For more details, see g_file_set_display_name() which is
* the synchronous version of this call.
*
* When the operation is finished, @callback will be called.
* You can then call g_file_set_display_name_finish() to get
* the result of the operation.
*/
void
g_file_set_display_name_async (GFile *file,
const gchar *display_name,
gint io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GFileIface *iface;
g_return_if_fail (G_IS_FILE (file));
g_return_if_fail (display_name != NULL);
iface = G_FILE_GET_IFACE (file);
(* iface->set_display_name_async) (file,
display_name,
io_priority,
cancellable,
callback,
user_data);
}
/**
* g_file_set_display_name_finish:
* @file: input #GFile
* @res: a #GAsyncResult
* @error: a #GError, or %NULL
*
* Finishes setting a display name started with
* g_file_set_display_name_async().
*
* Returns: (transfer full): a #GFile or %NULL on error.
* Free the returned object with g_object_unref().
*/
GFile *
g_file_set_display_name_finish (GFile *file,
GAsyncResult *res,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), NULL);
g_return_val_if_fail (G_IS_ASYNC_RESULT (res), NULL);
if (g_async_result_legacy_propagate_error (res, error))
return NULL;
iface = G_FILE_GET_IFACE (file);
return (* iface->set_display_name_finish) (file, res, error);
}
/**
* g_file_query_settable_attributes:
* @file: input #GFile
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @error: a #GError, or %NULL
*
* Obtain the list of settable attributes for the file.
*
* Returns the type and full attribute name of all the attributes
* that can be set on this file. This doesn't mean setting it will
* always succeed though, you might get an access failure, or some
* specific file may not support a specific attribute.
*
* If @cancellable is not %NULL, then the operation can be cancelled by
* triggering the cancellable object from another thread. If the operation
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
*
* Returns: (transfer full): a #GFileAttributeInfoList describing the settable attributes.
* When you are done with it, release it with
* g_file_attribute_info_list_unref()
*/
GFileAttributeInfoList *
g_file_query_settable_attributes (GFile *file,
GCancellable *cancellable,
GError **error)
{
GFileIface *iface;
GError *my_error;
GFileAttributeInfoList *list;
g_return_val_if_fail (G_IS_FILE (file), NULL);
if (g_cancellable_set_error_if_cancelled (cancellable, error))
return NULL;
iface = G_FILE_GET_IFACE (file);
if (iface->query_settable_attributes == NULL)
return g_file_attribute_info_list_new ();
my_error = NULL;
list = (* iface->query_settable_attributes) (file, cancellable, &my_error);
if (list == NULL)
{
if (my_error->domain == G_IO_ERROR && my_error->code == G_IO_ERROR_NOT_SUPPORTED)
{
list = g_file_attribute_info_list_new ();
g_error_free (my_error);
}
else
g_propagate_error (error, my_error);
}
return list;
}
/**
* g_file_query_writable_namespaces:
* @file: input #GFile
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @error: a #GError, or %NULL
*
* Obtain the list of attribute namespaces where new attributes
* can be created by a user. An example of this is extended
* attributes (in the "xattr" namespace).
*
* If @cancellable is not %NULL, then the operation can be cancelled by
* triggering the cancellable object from another thread. If the operation
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
*
* Returns: (transfer full): a #GFileAttributeInfoList describing the writable namespaces.
* When you are done with it, release it with
* g_file_attribute_info_list_unref()
*/
GFileAttributeInfoList *
g_file_query_writable_namespaces (GFile *file,
GCancellable *cancellable,
GError **error)
{
GFileIface *iface;
GError *my_error;
GFileAttributeInfoList *list;
g_return_val_if_fail (G_IS_FILE (file), NULL);
if (g_cancellable_set_error_if_cancelled (cancellable, error))
return NULL;
iface = G_FILE_GET_IFACE (file);
if (iface->query_writable_namespaces == NULL)
return g_file_attribute_info_list_new ();
my_error = NULL;
list = (* iface->query_writable_namespaces) (file, cancellable, &my_error);
if (list == NULL)
{
g_warn_if_reached();
list = g_file_attribute_info_list_new ();
}
if (my_error != NULL)
{
if (my_error->domain == G_IO_ERROR && my_error->code == G_IO_ERROR_NOT_SUPPORTED)
{
g_error_free (my_error);
}
else
g_propagate_error (error, my_error);
}
return list;
}
/**
* g_file_set_attribute:
* @file: input #GFile
* @attribute: a string containing the attribute's name
* @type: The type of the attribute
* @value_p: (nullable): a pointer to the value (or the pointer
* itself if the type is a pointer type)
* @flags: a set of #GFileQueryInfoFlags
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @error: a #GError, or %NULL
*
* Sets an attribute in the file with attribute name @attribute to @value_p.
*
* Some attributes can be unset by setting @type to
* %G_FILE_ATTRIBUTE_TYPE_INVALID and @value_p to %NULL.
*
* If @cancellable is not %NULL, then the operation can be cancelled by
* triggering the cancellable object from another thread. If the operation
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
*
* Returns: %TRUE if the attribute was set, %FALSE otherwise.
*/
gboolean
g_file_set_attribute (GFile *file,
const gchar *attribute,
GFileAttributeType type,
gpointer value_p,
GFileQueryInfoFlags flags,
GCancellable *cancellable,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), FALSE);
g_return_val_if_fail (attribute != NULL && *attribute != '\0', FALSE);
if (g_cancellable_set_error_if_cancelled (cancellable, error))
return FALSE;
iface = G_FILE_GET_IFACE (file);
if (iface->set_attribute == NULL)
{
g_set_error_literal (error, G_IO_ERROR,
G_IO_ERROR_NOT_SUPPORTED,
_("Operation not supported"));
return FALSE;
}
return (* iface->set_attribute) (file, attribute, type, value_p, flags, cancellable, error);
}
/**
* g_file_set_attributes_from_info:
* @file: input #GFile
* @info: a #GFileInfo
* @flags: #GFileQueryInfoFlags
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @error: a #GError, or %NULL
*
* Tries to set all attributes in the #GFileInfo on the target
* values, not stopping on the first error.
*
* If there is any error during this operation then @error will
* be set to the first error. Error on particular fields are flagged
* by setting the "status" field in the attribute value to
* %G_FILE_ATTRIBUTE_STATUS_ERROR_SETTING, which means you can
* also detect further errors.
*
* If @cancellable is not %NULL, then the operation can be cancelled by
* triggering the cancellable object from another thread. If the operation
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
*
* Returns: %FALSE if there was any error, %TRUE otherwise.
*/
gboolean
g_file_set_attributes_from_info (GFile *file,
GFileInfo *info,
GFileQueryInfoFlags flags,
GCancellable *cancellable,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), FALSE);
g_return_val_if_fail (G_IS_FILE_INFO (info), FALSE);
if (g_cancellable_set_error_if_cancelled (cancellable, error))
return FALSE;
g_file_info_clear_status (info);
iface = G_FILE_GET_IFACE (file);
return (* iface->set_attributes_from_info) (file,
info,
flags,
cancellable,
error);
}
static gboolean
g_file_real_set_attributes_from_info (GFile *file,
GFileInfo *info,
GFileQueryInfoFlags flags,
GCancellable *cancellable,
GError **error)
{
char **attributes;
int i;
gboolean res;
GFileAttributeValue *value;
res = TRUE;
attributes = g_file_info_list_attributes (info, NULL);
for (i = 0; attributes[i] != NULL; i++)
{
value = _g_file_info_get_attribute_value (info, attributes[i]);
if (value->status != G_FILE_ATTRIBUTE_STATUS_UNSET)
continue;
if (!g_file_set_attribute (file, attributes[i],
value->type, _g_file_attribute_value_peek_as_pointer (value),
flags, cancellable, error))
{
value->status = G_FILE_ATTRIBUTE_STATUS_ERROR_SETTING;
res = FALSE;
/* Don't set error multiple times */
error = NULL;
}
else
value->status = G_FILE_ATTRIBUTE_STATUS_SET;
}
g_strfreev (attributes);
return res;
}
/**
* g_file_set_attributes_async:
* @file: input #GFile
* @info: a #GFileInfo
* @flags: a #GFileQueryInfoFlags
* @io_priority: the [I/O priority](iface.AsyncResult.html#io-priority) of the request
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @callback: (scope async) (closure user_data): a #GAsyncReadyCallback
* to call when the request is satisfied
* @user_data: the data to pass to callback function
*
* Asynchronously sets the attributes of @file with @info.
*
* For more details, see g_file_set_attributes_from_info(),
* which is the synchronous version of this call.
*
* When the operation is finished, @callback will be called.
* You can then call g_file_set_attributes_finish() to get
* the result of the operation.
*/
void
g_file_set_attributes_async (GFile *file,
GFileInfo *info,
GFileQueryInfoFlags flags,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GFileIface *iface;
g_return_if_fail (G_IS_FILE (file));
g_return_if_fail (G_IS_FILE_INFO (info));
iface = G_FILE_GET_IFACE (file);
(* iface->set_attributes_async) (file,
info,
flags,
io_priority,
cancellable,
callback,
user_data);
}
/**
* g_file_set_attributes_finish:
* @file: input #GFile
* @result: a #GAsyncResult
* @info: (out) (transfer full): a #GFileInfo
* @error: a #GError, or %NULL
*
* Finishes setting an attribute started in g_file_set_attributes_async().
*
* Returns: %TRUE if the attributes were set correctly, %FALSE otherwise.
*/
gboolean
g_file_set_attributes_finish (GFile *file,
GAsyncResult *result,
GFileInfo **info,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), FALSE);
g_return_val_if_fail (G_IS_ASYNC_RESULT (result), FALSE);
/* No standard handling of errors here, as we must set info even
* on errors
*/
iface = G_FILE_GET_IFACE (file);
return (* iface->set_attributes_finish) (file, result, info, error);
}
/**
* g_file_set_attribute_string:
* @file: input #GFile
* @attribute: a string containing the attribute's name
* @value: a string containing the attribute's value
* @flags: #GFileQueryInfoFlags
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @error: a #GError, or %NULL
*
* Sets @attribute of type %G_FILE_ATTRIBUTE_TYPE_STRING to @value.
* If @attribute is of a different type, this operation will fail.
*
* If @cancellable is not %NULL, then the operation can be cancelled by
* triggering the cancellable object from another thread. If the operation
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
*
* Returns: %TRUE if the @attribute was successfully set, %FALSE otherwise.
*/
gboolean
g_file_set_attribute_string (GFile *file,
const char *attribute,
const char *value,
GFileQueryInfoFlags flags,
GCancellable *cancellable,
GError **error)
{
return g_file_set_attribute (file, attribute,
G_FILE_ATTRIBUTE_TYPE_STRING, (gpointer)value,
flags, cancellable, error);
}
/**
* g_file_set_attribute_byte_string:
* @file: input #GFile
* @attribute: a string containing the attribute's name
* @value: a string containing the attribute's new value
* @flags: a #GFileQueryInfoFlags
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @error: a #GError, or %NULL
*
* Sets @attribute of type %G_FILE_ATTRIBUTE_TYPE_BYTE_STRING to @value.
* If @attribute is of a different type, this operation will fail,
* returning %FALSE.
*
* If @cancellable is not %NULL, then the operation can be cancelled by
* triggering the cancellable object from another thread. If the operation
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
*
* Returns: %TRUE if the @attribute was successfully set to @value
* in the @file, %FALSE otherwise.
*/
gboolean
g_file_set_attribute_byte_string (GFile *file,
const gchar *attribute,
const gchar *value,
GFileQueryInfoFlags flags,
GCancellable *cancellable,
GError **error)
{
return g_file_set_attribute (file, attribute,
G_FILE_ATTRIBUTE_TYPE_BYTE_STRING, (gpointer)value,
flags, cancellable, error);
}
/**
* g_file_set_attribute_uint32:
* @file: input #GFile
* @attribute: a string containing the attribute's name
* @value: a #guint32 containing the attribute's new value
* @flags: a #GFileQueryInfoFlags
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @error: a #GError, or %NULL
*
* Sets @attribute of type %G_FILE_ATTRIBUTE_TYPE_UINT32 to @value.
* If @attribute is of a different type, this operation will fail.
*
* If @cancellable is not %NULL, then the operation can be cancelled by
* triggering the cancellable object from another thread. If the operation
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
*
* Returns: %TRUE if the @attribute was successfully set to @value
* in the @file, %FALSE otherwise.
*/
gboolean
g_file_set_attribute_uint32 (GFile *file,
const gchar *attribute,
guint32 value,
GFileQueryInfoFlags flags,
GCancellable *cancellable,
GError **error)
{
return g_file_set_attribute (file, attribute,
G_FILE_ATTRIBUTE_TYPE_UINT32, &value,
flags, cancellable, error);
}
/**
* g_file_set_attribute_int32:
* @file: input #GFile
* @attribute: a string containing the attribute's name
* @value: a #gint32 containing the attribute's new value
* @flags: a #GFileQueryInfoFlags
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @error: a #GError, or %NULL
*
* Sets @attribute of type %G_FILE_ATTRIBUTE_TYPE_INT32 to @value.
* If @attribute is of a different type, this operation will fail.
*
* If @cancellable is not %NULL, then the operation can be cancelled by
* triggering the cancellable object from another thread. If the operation
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
*
* Returns: %TRUE if the @attribute was successfully set to @value
* in the @file, %FALSE otherwise.
*/
gboolean
g_file_set_attribute_int32 (GFile *file,
const gchar *attribute,
gint32 value,
GFileQueryInfoFlags flags,
GCancellable *cancellable,
GError **error)
{
return g_file_set_attribute (file, attribute,
G_FILE_ATTRIBUTE_TYPE_INT32, &value,
flags, cancellable, error);
}
/**
* g_file_set_attribute_uint64:
* @file: input #GFile
* @attribute: a string containing the attribute's name
* @value: a #guint64 containing the attribute's new value
* @flags: a #GFileQueryInfoFlags
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @error: a #GError, or %NULL
*
* Sets @attribute of type %G_FILE_ATTRIBUTE_TYPE_UINT64 to @value.
* If @attribute is of a different type, this operation will fail.
*
* If @cancellable is not %NULL, then the operation can be cancelled by
* triggering the cancellable object from another thread. If the operation
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
*
* Returns: %TRUE if the @attribute was successfully set to @value
* in the @file, %FALSE otherwise.
*/
gboolean
g_file_set_attribute_uint64 (GFile *file,
const gchar *attribute,
guint64 value,
GFileQueryInfoFlags flags,
GCancellable *cancellable,
GError **error)
{
return g_file_set_attribute (file, attribute,
G_FILE_ATTRIBUTE_TYPE_UINT64, &value,
flags, cancellable, error);
}
/**
* g_file_set_attribute_int64:
* @file: input #GFile
* @attribute: a string containing the attribute's name
* @value: a #guint64 containing the attribute's new value
* @flags: a #GFileQueryInfoFlags
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @error: a #GError, or %NULL
*
* Sets @attribute of type %G_FILE_ATTRIBUTE_TYPE_INT64 to @value.
* If @attribute is of a different type, this operation will fail.
*
* If @cancellable is not %NULL, then the operation can be cancelled by
* triggering the cancellable object from another thread. If the operation
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
*
* Returns: %TRUE if the @attribute was successfully set, %FALSE otherwise.
*/
gboolean
g_file_set_attribute_int64 (GFile *file,
const gchar *attribute,
gint64 value,
GFileQueryInfoFlags flags,
GCancellable *cancellable,
GError **error)
{
return g_file_set_attribute (file, attribute,
G_FILE_ATTRIBUTE_TYPE_INT64, &value,
flags, cancellable, error);
}
/**
* g_file_mount_mountable:
* @file: input #GFile
* @flags: flags affecting the operation
* @mount_operation: (nullable): a #GMountOperation,
* or %NULL to avoid user interaction
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @callback: (scope async) (closure user_data): a #GAsyncReadyCallback
* to call when the request is satisfied
* @user_data: the data to pass to callback function
*
* Mounts a file of type G_FILE_TYPE_MOUNTABLE.
* Using @mount_operation, you can request callbacks when, for instance,
* passwords are needed during authentication.
*
* If @cancellable is not %NULL, then the operation can be cancelled by
* triggering the cancellable object from another thread. If the operation
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
*
* When the operation is finished, @callback will be called.
* You can then call g_file_mount_mountable_finish() to get
* the result of the operation.
*/
void
g_file_mount_mountable (GFile *file,
GMountMountFlags flags,
GMountOperation *mount_operation,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GFileIface *iface;
g_return_if_fail (G_IS_FILE (file));
iface = G_FILE_GET_IFACE (file);
if (iface->mount_mountable == NULL)
{
g_task_report_new_error (file, callback, user_data,
g_file_mount_mountable,
G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
_("Operation not supported"));
return;
}
(* iface->mount_mountable) (file,
flags,
mount_operation,
cancellable,
callback,
user_data);
}
/**
* g_file_mount_mountable_finish:
* @file: input #GFile
* @result: a #GAsyncResult
* @error: a #GError, or %NULL
*
* Finishes a mount operation. See g_file_mount_mountable() for details.
*
* Finish an asynchronous mount operation that was started
* with g_file_mount_mountable().
*
* Returns: (transfer full): a #GFile or %NULL on error.
* Free the returned object with g_object_unref().
*/
GFile *
g_file_mount_mountable_finish (GFile *file,
GAsyncResult *result,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), NULL);
g_return_val_if_fail (G_IS_ASYNC_RESULT (result), NULL);
if (g_async_result_legacy_propagate_error (result, error))
return NULL;
else if (g_async_result_is_tagged (result, g_file_mount_mountable))
return g_task_propagate_pointer (G_TASK (result), error);
iface = G_FILE_GET_IFACE (file);
return (* iface->mount_mountable_finish) (file, result, error);
}
/**
* g_file_unmount_mountable:
* @file: input #GFile
* @flags: flags affecting the operation
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @callback: (scope async) (nullable) (closure user_data): a #GAsyncReadyCallback
* to call when the request is satisfied
* @user_data: the data to pass to callback function
*
* Unmounts a file of type G_FILE_TYPE_MOUNTABLE.
*
* If @cancellable is not %NULL, then the operation can be cancelled by
* triggering the cancellable object from another thread. If the operation
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
*
* When the operation is finished, @callback will be called.
* You can then call g_file_unmount_mountable_finish() to get
* the result of the operation.
*
* Deprecated: 2.22: Use g_file_unmount_mountable_with_operation() instead.
*/
void
g_file_unmount_mountable (GFile *file,
GMountUnmountFlags flags,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GFileIface *iface;
g_return_if_fail (G_IS_FILE (file));
iface = G_FILE_GET_IFACE (file);
if (iface->unmount_mountable == NULL)
{
g_task_report_new_error (file, callback, user_data,
g_file_unmount_mountable_with_operation,
G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
_("Operation not supported"));
return;
}
(* iface->unmount_mountable) (file,
flags,
cancellable,
callback,
user_data);
}
/**
* g_file_unmount_mountable_finish:
* @file: input #GFile
* @result: a #GAsyncResult
* @error: a #GError, or %NULL
*
* Finishes an unmount operation, see g_file_unmount_mountable() for details.
*
* Finish an asynchronous unmount operation that was started
* with g_file_unmount_mountable().
*
* Returns: %TRUE if the operation finished successfully.
* %FALSE otherwise.
*
* Deprecated: 2.22: Use g_file_unmount_mountable_with_operation_finish()
* instead.
*/
gboolean
g_file_unmount_mountable_finish (GFile *file,
GAsyncResult *result,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), FALSE);
g_return_val_if_fail (G_IS_ASYNC_RESULT (result), FALSE);
if (g_async_result_legacy_propagate_error (result, error))
return FALSE;
else if (g_async_result_is_tagged (result, g_file_unmount_mountable_with_operation))
return g_task_propagate_boolean (G_TASK (result), error);
iface = G_FILE_GET_IFACE (file);
return (* iface->unmount_mountable_finish) (file, result, error);
}
/**
* g_file_unmount_mountable_with_operation:
* @file: input #GFile
* @flags: flags affecting the operation
* @mount_operation: (nullable): a #GMountOperation,
* or %NULL to avoid user interaction
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @callback: (scope async) (nullable) (closure user_data): a #GAsyncReadyCallback
* to call when the request is satisfied
* @user_data: the data to pass to callback function
*
* Unmounts a file of type %G_FILE_TYPE_MOUNTABLE.
*
* If @cancellable is not %NULL, then the operation can be cancelled by
* triggering the cancellable object from another thread. If the operation
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
*
* When the operation is finished, @callback will be called.
* You can then call g_file_unmount_mountable_finish() to get
* the result of the operation.
*
* Since: 2.22
*/
void
g_file_unmount_mountable_with_operation (GFile *file,
GMountUnmountFlags flags,
GMountOperation *mount_operation,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GFileIface *iface;
g_return_if_fail (G_IS_FILE (file));
iface = G_FILE_GET_IFACE (file);
if (iface->unmount_mountable == NULL && iface->unmount_mountable_with_operation == NULL)
{
g_task_report_new_error (file, callback, user_data,
g_file_unmount_mountable_with_operation,
G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
_("Operation not supported"));
return;
}
if (iface->unmount_mountable_with_operation != NULL)
(* iface->unmount_mountable_with_operation) (file,
flags,
mount_operation,
cancellable,
callback,
user_data);
else
(* iface->unmount_mountable) (file,
flags,
cancellable,
callback,
user_data);
}
/**
* g_file_unmount_mountable_with_operation_finish:
* @file: input #GFile
* @result: a #GAsyncResult
* @error: a #GError, or %NULL
*
* Finishes an unmount operation,
* see g_file_unmount_mountable_with_operation() for details.
*
* Finish an asynchronous unmount operation that was started
* with g_file_unmount_mountable_with_operation().
*
* Returns: %TRUE if the operation finished successfully.
* %FALSE otherwise.
*
* Since: 2.22
*/
gboolean
g_file_unmount_mountable_with_operation_finish (GFile *file,
GAsyncResult *result,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), FALSE);
g_return_val_if_fail (G_IS_ASYNC_RESULT (result), FALSE);
if (g_async_result_legacy_propagate_error (result, error))
return FALSE;
else if (g_async_result_is_tagged (result, g_file_unmount_mountable_with_operation))
return g_task_propagate_boolean (G_TASK (result), error);
iface = G_FILE_GET_IFACE (file);
if (iface->unmount_mountable_with_operation_finish != NULL)
return (* iface->unmount_mountable_with_operation_finish) (file, result, error);
else
return (* iface->unmount_mountable_finish) (file, result, error);
}
/**
* g_file_eject_mountable:
* @file: input #GFile
* @flags: flags affecting the operation
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @callback: (scope async) (nullable) (closure user_data): a #GAsyncReadyCallback
* to call when the request is satisfied
* @user_data: the data to pass to callback function
*
* Starts an asynchronous eject on a mountable.
* When this operation has completed, @callback will be called with
* @user_user data, and the operation can be finalized with
* g_file_eject_mountable_finish().
*
* If @cancellable is not %NULL, then the operation can be cancelled by
* triggering the cancellable object from another thread. If the operation
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
*
* Deprecated: 2.22: Use g_file_eject_mountable_with_operation() instead.
*/
void
g_file_eject_mountable (GFile *file,
GMountUnmountFlags flags,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GFileIface *iface;
g_return_if_fail (G_IS_FILE (file));
iface = G_FILE_GET_IFACE (file);
if (iface->eject_mountable == NULL)
{
g_task_report_new_error (file, callback, user_data,
g_file_eject_mountable_with_operation,
G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
_("Operation not supported"));
return;
}
(* iface->eject_mountable) (file,
flags,
cancellable,
callback,
user_data);
}
/**
* g_file_eject_mountable_finish:
* @file: input #GFile
* @result: a #GAsyncResult
* @error: a #GError, or %NULL
*
* Finishes an asynchronous eject operation started by
* g_file_eject_mountable().
*
* Returns: %TRUE if the @file was ejected successfully.
* %FALSE otherwise.
*
* Deprecated: 2.22: Use g_file_eject_mountable_with_operation_finish()
* instead.
*/
gboolean
g_file_eject_mountable_finish (GFile *file,
GAsyncResult *result,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), FALSE);
g_return_val_if_fail (G_IS_ASYNC_RESULT (result), FALSE);
if (g_async_result_legacy_propagate_error (result, error))
return FALSE;
else if (g_async_result_is_tagged (result, g_file_eject_mountable_with_operation))
return g_task_propagate_boolean (G_TASK (result), error);
iface = G_FILE_GET_IFACE (file);
return (* iface->eject_mountable_finish) (file, result, error);
}
/**
* g_file_eject_mountable_with_operation:
* @file: input #GFile
* @flags: flags affecting the operation
* @mount_operation: (nullable): a #GMountOperation,
* or %NULL to avoid user interaction
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @callback: (scope async) (nullable) (closure user_data): a #GAsyncReadyCallback
* to call when the request is satisfied
* @user_data: the data to pass to callback function
*
* Starts an asynchronous eject on a mountable.
* When this operation has completed, @callback will be called with
* @user_user data, and the operation can be finalized with
* g_file_eject_mountable_with_operation_finish().
*
* If @cancellable is not %NULL, then the operation can be cancelled by
* triggering the cancellable object from another thread. If the operation
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
*
* Since: 2.22
*/
void
g_file_eject_mountable_with_operation (GFile *file,
GMountUnmountFlags flags,
GMountOperation *mount_operation,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GFileIface *iface;
g_return_if_fail (G_IS_FILE (file));
iface = G_FILE_GET_IFACE (file);
if (iface->eject_mountable == NULL && iface->eject_mountable_with_operation == NULL)
{
g_task_report_new_error (file, callback, user_data,
g_file_eject_mountable_with_operation,
G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
_("Operation not supported"));
return;
}
if (iface->eject_mountable_with_operation != NULL)
(* iface->eject_mountable_with_operation) (file,
flags,
mount_operation,
cancellable,
callback,
user_data);
else
(* iface->eject_mountable) (file,
flags,
cancellable,
callback,
user_data);
}
/**
* g_file_eject_mountable_with_operation_finish:
* @file: input #GFile
* @result: a #GAsyncResult
* @error: a #GError, or %NULL
*
* Finishes an asynchronous eject operation started by
* g_file_eject_mountable_with_operation().
*
* Returns: %TRUE if the @file was ejected successfully.
* %FALSE otherwise.
*
* Since: 2.22
*/
gboolean
g_file_eject_mountable_with_operation_finish (GFile *file,
GAsyncResult *result,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), FALSE);
g_return_val_if_fail (G_IS_ASYNC_RESULT (result), FALSE);
if (g_async_result_legacy_propagate_error (result, error))
return FALSE;
else if (g_async_result_is_tagged (result, g_file_eject_mountable_with_operation))
return g_task_propagate_boolean (G_TASK (result), error);
iface = G_FILE_GET_IFACE (file);
if (iface->eject_mountable_with_operation_finish != NULL)
return (* iface->eject_mountable_with_operation_finish) (file, result, error);
else
return (* iface->eject_mountable_finish) (file, result, error);
}
/**
* g_file_monitor_directory: (virtual monitor_dir)
* @file: input #GFile
* @flags: a set of #GFileMonitorFlags
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @error: a #GError, or %NULL
*
* Obtains a directory monitor for the given file.
* This may fail if directory monitoring is not supported.
*
* If @cancellable is not %NULL, then the operation can be cancelled by
* triggering the cancellable object from another thread. If the operation
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
*
* It does not make sense for @flags to contain
* %G_FILE_MONITOR_WATCH_HARD_LINKS, since hard links can not be made to
* directories. It is not possible to monitor all the files in a
* directory for changes made via hard links; if you want to do this then
* you must register individual watches with g_file_monitor().
*
* Returns: (transfer full): a #GFileMonitor for the given @file,
* or %NULL on error. Free the returned object with g_object_unref().
*/
GFileMonitor *
g_file_monitor_directory (GFile *file,
GFileMonitorFlags flags,
GCancellable *cancellable,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), NULL);
g_return_val_if_fail (~flags & G_FILE_MONITOR_WATCH_HARD_LINKS, NULL);
if (g_cancellable_set_error_if_cancelled (cancellable, error))
return NULL;
iface = G_FILE_GET_IFACE (file);
if (iface->monitor_dir == NULL)
{
g_set_error_literal (error, G_IO_ERROR,
G_IO_ERROR_NOT_SUPPORTED,
_("Operation not supported"));
return NULL;
}
return (* iface->monitor_dir) (file, flags, cancellable, error);
}
/**
* g_file_monitor_file:
* @file: input #GFile
* @flags: a set of #GFileMonitorFlags
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @error: a #GError, or %NULL
*
* Obtains a file monitor for the given file. If no file notification
* mechanism exists, then regular polling of the file is used.
*
* If @cancellable is not %NULL, then the operation can be cancelled by
* triggering the cancellable object from another thread. If the operation
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
*
* If @flags contains %G_FILE_MONITOR_WATCH_HARD_LINKS then the monitor
* will also attempt to report changes made to the file via another
* filename (ie, a hard link). Without this flag, you can only rely on
* changes made through the filename contained in @file to be
* reported. Using this flag may result in an increase in resource
* usage, and may not have any effect depending on the #GFileMonitor
* backend and/or filesystem type.
*
* Returns: (transfer full): a #GFileMonitor for the given @file,
* or %NULL on error.
* Free the returned object with g_object_unref().
*/
GFileMonitor *
g_file_monitor_file (GFile *file,
GFileMonitorFlags flags,
GCancellable *cancellable,
GError **error)
{
GFileIface *iface;
GFileMonitor *monitor;
g_return_val_if_fail (G_IS_FILE (file), NULL);
if (g_cancellable_set_error_if_cancelled (cancellable, error))
return NULL;
iface = G_FILE_GET_IFACE (file);
monitor = NULL;
if (iface->monitor_file)
monitor = (* iface->monitor_file) (file, flags, cancellable, NULL);
/* Fallback to polling */
if (monitor == NULL)
monitor = _g_poll_file_monitor_new (file);
return monitor;
}
/**
* g_file_monitor:
* @file: input #GFile
* @flags: a set of #GFileMonitorFlags
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @error: a #GError, or %NULL
*
* Obtains a file or directory monitor for the given file,
* depending on the type of the file.
*
* If @cancellable is not %NULL, then the operation can be cancelled by
* triggering the cancellable object from another thread. If the operation
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
*
* Returns: (transfer full): a #GFileMonitor for the given @file,
* or %NULL on error.
* Free the returned object with g_object_unref().
*
* Since: 2.18
*/
GFileMonitor *
g_file_monitor (GFile *file,
GFileMonitorFlags flags,
GCancellable *cancellable,
GError **error)
{
if (g_file_query_file_type (file, 0, cancellable) == G_FILE_TYPE_DIRECTORY)
return g_file_monitor_directory (file,
flags & ~G_FILE_MONITOR_WATCH_HARD_LINKS,
cancellable, error);
else
return g_file_monitor_file (file, flags, cancellable, error);
}
/********************************************
* Default implementation of async ops *
********************************************/
typedef struct {
char *attributes;
GFileQueryInfoFlags flags;
} QueryInfoAsyncData;
static void
query_info_data_free (QueryInfoAsyncData *data)
{
g_free (data->attributes);
g_free (data);
}
static void
query_info_async_thread (GTask *task,
gpointer object,
gpointer task_data,
GCancellable *cancellable)
{
QueryInfoAsyncData *data = task_data;
GFileInfo *info;
GError *error = NULL;
info = g_file_query_info (G_FILE (object), data->attributes, data->flags, cancellable, &error);
if (info)
g_task_return_pointer (task, info, g_object_unref);
else
g_task_return_error (task, error);
}
static void
g_file_real_query_info_async (GFile *file,
const char *attributes,
GFileQueryInfoFlags flags,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GTask *task;
QueryInfoAsyncData *data;
data = g_new0 (QueryInfoAsyncData, 1);
data->attributes = g_strdup (attributes);
data->flags = flags;
task = g_task_new (file, cancellable, callback, user_data);
g_task_set_source_tag (task, g_file_real_query_info_async);
g_task_set_task_data (task, data, (GDestroyNotify)query_info_data_free);
g_task_set_priority (task, io_priority);
g_task_run_in_thread (task, query_info_async_thread);
g_object_unref (task);
}
static GFileInfo *
g_file_real_query_info_finish (GFile *file,
GAsyncResult *res,
GError **error)
{
g_return_val_if_fail (g_task_is_valid (res, file), NULL);
return g_task_propagate_pointer (G_TASK (res), error);
}
static void
query_filesystem_info_async_thread (GTask *task,
gpointer object,
gpointer task_data,
GCancellable *cancellable)
{
const char *attributes = task_data;
GFileInfo *info;
GError *error = NULL;
info = g_file_query_filesystem_info (G_FILE (object), attributes, cancellable, &error);
if (info)
g_task_return_pointer (task, info, g_object_unref);
else
g_task_return_error (task, error);
}
static void
g_file_real_query_filesystem_info_async (GFile *file,
const char *attributes,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GTask *task;
task = g_task_new (file, cancellable, callback, user_data);
g_task_set_source_tag (task, g_file_real_query_filesystem_info_async);
g_task_set_task_data (task, g_strdup (attributes), g_free);
g_task_set_priority (task, io_priority);
g_task_run_in_thread (task, query_filesystem_info_async_thread);
g_object_unref (task);
}
static GFileInfo *
g_file_real_query_filesystem_info_finish (GFile *file,
GAsyncResult *res,
GError **error)
{
g_return_val_if_fail (g_task_is_valid (res, file), NULL);
return g_task_propagate_pointer (G_TASK (res), error);
}
static void
enumerate_children_async_thread (GTask *task,
gpointer object,
gpointer task_data,
GCancellable *cancellable)
{
QueryInfoAsyncData *data = task_data;
GFileEnumerator *enumerator;
GError *error = NULL;
enumerator = g_file_enumerate_children (G_FILE (object), data->attributes, data->flags, cancellable, &error);
if (error)
g_task_return_error (task, error);
else
g_task_return_pointer (task, enumerator, g_object_unref);
}
static void
g_file_real_enumerate_children_async (GFile *file,
const char *attributes,
GFileQueryInfoFlags flags,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GTask *task;
QueryInfoAsyncData *data;
data = g_new0 (QueryInfoAsyncData, 1);
data->attributes = g_strdup (attributes);
data->flags = flags;
task = g_task_new (file, cancellable, callback, user_data);
g_task_set_source_tag (task, g_file_real_enumerate_children_async);
g_task_set_task_data (task, data, (GDestroyNotify)query_info_data_free);
g_task_set_priority (task, io_priority);
g_task_run_in_thread (task, enumerate_children_async_thread);
g_object_unref (task);
}
static GFileEnumerator *
g_file_real_enumerate_children_finish (GFile *file,
GAsyncResult *res,
GError **error)
{
g_return_val_if_fail (g_task_is_valid (res, file), NULL);
return g_task_propagate_pointer (G_TASK (res), error);
}
static void
open_read_async_thread (GTask *task,
gpointer object,
gpointer task_data,
GCancellable *cancellable)
{
GFileInputStream *stream;
GError *error = NULL;
stream = g_file_read (G_FILE (object), cancellable, &error);
if (stream)
g_task_return_pointer (task, stream, g_object_unref);
else
g_task_return_error (task, error);
}
static void
g_file_real_read_async (GFile *file,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GTask *task;
task = g_task_new (file, cancellable, callback, user_data);
g_task_set_source_tag (task, g_file_real_read_async);
g_task_set_priority (task, io_priority);
g_task_run_in_thread (task, open_read_async_thread);
g_object_unref (task);
}
static GFileInputStream *
g_file_real_read_finish (GFile *file,
GAsyncResult *res,
GError **error)
{
g_return_val_if_fail (g_task_is_valid (res, file), NULL);
return g_task_propagate_pointer (G_TASK (res), error);
}
static void
append_to_async_thread (GTask *task,
gpointer source_object,
gpointer task_data,
GCancellable *cancellable)
{
GFileCreateFlags *data = task_data;
GFileOutputStream *stream;
GError *error = NULL;
stream = g_file_append_to (G_FILE (source_object), *data, cancellable, &error);
if (stream)
g_task_return_pointer (task, stream, g_object_unref);
else
g_task_return_error (task, error);
}
static void
g_file_real_append_to_async (GFile *file,
GFileCreateFlags flags,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GFileCreateFlags *data;
GTask *task;
data = g_new0 (GFileCreateFlags, 1);
*data = flags;
task = g_task_new (file, cancellable, callback, user_data);
g_task_set_source_tag (task, g_file_real_append_to_async);
g_task_set_task_data (task, data, g_free);
g_task_set_priority (task, io_priority);
g_task_run_in_thread (task, append_to_async_thread);
g_object_unref (task);
}
static GFileOutputStream *
g_file_real_append_to_finish (GFile *file,
GAsyncResult *res,
GError **error)
{
g_return_val_if_fail (g_task_is_valid (res, file), NULL);
return g_task_propagate_pointer (G_TASK (res), error);
}
static void
create_async_thread (GTask *task,
gpointer source_object,
gpointer task_data,
GCancellable *cancellable)
{
GFileCreateFlags *data = task_data;
GFileOutputStream *stream;
GError *error = NULL;
stream = g_file_create (G_FILE (source_object), *data, cancellable, &error);
if (stream)
g_task_return_pointer (task, stream, g_object_unref);
else
g_task_return_error (task, error);
}
static void
g_file_real_create_async (GFile *file,
GFileCreateFlags flags,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GFileCreateFlags *data;
GTask *task;
data = g_new0 (GFileCreateFlags, 1);
*data = flags;
task = g_task_new (file, cancellable, callback, user_data);
g_task_set_source_tag (task, g_file_real_create_async);
g_task_set_task_data (task, data, g_free);
g_task_set_priority (task, io_priority);
g_task_run_in_thread (task, create_async_thread);
g_object_unref (task);
}
static GFileOutputStream *
g_file_real_create_finish (GFile *file,
GAsyncResult *res,
GError **error)
{
g_return_val_if_fail (g_task_is_valid (res, file), NULL);
return g_task_propagate_pointer (G_TASK (res), error);
}
typedef struct {
GFileOutputStream *stream;
char *etag;
gboolean make_backup;
GFileCreateFlags flags;
} ReplaceAsyncData;
static void
replace_async_data_free (ReplaceAsyncData *data)
{
if (data->stream)
g_object_unref (data->stream);
g_free (data->etag);
g_free (data);
}
static void
replace_async_thread (GTask *task,
gpointer source_object,
gpointer task_data,
GCancellable *cancellable)
{
GFileOutputStream *stream;
ReplaceAsyncData *data = task_data;
GError *error = NULL;
stream = g_file_replace (G_FILE (source_object),
data->etag,
data->make_backup,
data->flags,
cancellable,
&error);
if (stream)
g_task_return_pointer (task, stream, g_object_unref);
else
g_task_return_error (task, error);
}
static void
g_file_real_replace_async (GFile *file,
const char *etag,
gboolean make_backup,
GFileCreateFlags flags,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GTask *task;
ReplaceAsyncData *data;
data = g_new0 (ReplaceAsyncData, 1);
data->etag = g_strdup (etag);
data->make_backup = make_backup;
data->flags = flags;
task = g_task_new (file, cancellable, callback, user_data);
g_task_set_source_tag (task, g_file_real_replace_async);
g_task_set_task_data (task, data, (GDestroyNotify)replace_async_data_free);
g_task_set_priority (task, io_priority);
g_task_run_in_thread (task, replace_async_thread);
g_object_unref (task);
}
static GFileOutputStream *
g_file_real_replace_finish (GFile *file,
GAsyncResult *res,
GError **error)
{
g_return_val_if_fail (g_task_is_valid (res, file), NULL);
return g_task_propagate_pointer (G_TASK (res), error);
}
static void
delete_async_thread (GTask *task,
gpointer object,
gpointer task_data,
GCancellable *cancellable)
{
GError *error = NULL;
if (g_file_delete (G_FILE (object), cancellable, &error))
g_task_return_boolean (task, TRUE);
else
g_task_return_error (task, error);
}
static void
g_file_real_delete_async (GFile *file,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GTask *task;
task = g_task_new (file, cancellable, callback, user_data);
g_task_set_source_tag (task, g_file_real_delete_async);
g_task_set_priority (task, io_priority);
g_task_run_in_thread (task, delete_async_thread);
g_object_unref (task);
}
static gboolean
g_file_real_delete_finish (GFile *file,
GAsyncResult *res,
GError **error)
{
g_return_val_if_fail (g_task_is_valid (res, file), FALSE);
return g_task_propagate_boolean (G_TASK (res), error);
}
static void
trash_async_thread (GTask *task,
gpointer object,
gpointer task_data,
GCancellable *cancellable)
{
GError *error = NULL;
if (g_file_trash (G_FILE (object), cancellable, &error))
g_task_return_boolean (task, TRUE);
else
g_task_return_error (task, error);
}
static void
g_file_real_trash_async (GFile *file,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GTask *task;
task = g_task_new (file, cancellable, callback, user_data);
g_task_set_source_tag (task, g_file_real_trash_async);
g_task_set_priority (task, io_priority);
g_task_run_in_thread (task, trash_async_thread);
g_object_unref (task);
}
static gboolean
g_file_real_trash_finish (GFile *file,
GAsyncResult *res,
GError **error)
{
g_return_val_if_fail (g_task_is_valid (res, file), FALSE);
return g_task_propagate_boolean (G_TASK (res), error);
}
typedef struct {
GFile *source; /* (owned) */
GFile *destination; /* (owned) */
GFileCopyFlags flags;
GFileProgressCallback progress_cb;
gpointer progress_cb_data;
} MoveAsyncData;
static void
move_async_data_free (MoveAsyncData *data)
{
g_object_unref (data->source);
g_object_unref (data->destination);
g_slice_free (MoveAsyncData, data);
}
typedef struct {
MoveAsyncData *data; /* (unowned) */
goffset current_num_bytes;
goffset total_num_bytes;
} MoveProgressData;
static gboolean
move_async_progress_in_main (gpointer user_data)
{
MoveProgressData *progress = user_data;
MoveAsyncData *data = progress->data;
data->progress_cb (progress->current_num_bytes,
progress->total_num_bytes,
data->progress_cb_data);
return G_SOURCE_REMOVE;
}
static void
move_async_progress_callback (goffset current_num_bytes,
goffset total_num_bytes,
gpointer user_data)
{
GTask *task = user_data;
MoveAsyncData *data = g_task_get_task_data (task);
MoveProgressData *progress;
progress = g_new0 (MoveProgressData, 1);
progress->data = data;
progress->current_num_bytes = current_num_bytes;
progress->total_num_bytes = total_num_bytes;
g_main_context_invoke_full (g_task_get_context (task),
g_task_get_priority (task),
move_async_progress_in_main,
g_steal_pointer (&progress),
g_free);
}
static void
move_async_thread (GTask *task,
gpointer source,
gpointer task_data,
GCancellable *cancellable)
{
MoveAsyncData *data = task_data;
gboolean result;
GError *error = NULL;
result = g_file_move (data->source,
data->destination,
data->flags,
cancellable,
(data->progress_cb != NULL) ? move_async_progress_callback : NULL,
task,
&error);
if (result)
g_task_return_boolean (task, TRUE);
else
g_task_return_error (task, g_steal_pointer (&error));
}
static void
g_file_real_move_async (GFile *source,
GFile *destination,
GFileCopyFlags flags,
int io_priority,
GCancellable *cancellable,
GFileProgressCallback progress_callback,
gpointer progress_callback_data,
GAsyncReadyCallback callback,
gpointer user_data)
{
GTask *task;
MoveAsyncData *data;
data = g_slice_new0 (MoveAsyncData);
data->source = g_object_ref (source);
data->destination = g_object_ref (destination);
data->flags = flags;
data->progress_cb = progress_callback;
data->progress_cb_data = progress_callback_data;
task = g_task_new (source, cancellable, callback, user_data);
g_task_set_source_tag (task, g_file_real_move_async);
g_task_set_task_data (task, g_steal_pointer (&data), (GDestroyNotify) move_async_data_free);
g_task_set_priority (task, io_priority);
g_task_run_in_thread (task, move_async_thread);
g_object_unref (task);
}
static gboolean
g_file_real_move_finish (GFile *file,
GAsyncResult *result,
GError **error)
{
g_return_val_if_fail (g_task_is_valid (result, file), FALSE);
return g_task_propagate_boolean (G_TASK (result), error);
}
static void
make_directory_async_thread (GTask *task,
gpointer object,
gpointer task_data,
GCancellable *cancellable)
{
GError *error = NULL;
if (g_file_make_directory (G_FILE (object), cancellable, &error))
g_task_return_boolean (task, TRUE);
else
g_task_return_error (task, error);
}
static void
g_file_real_make_directory_async (GFile *file,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GTask *task;
task = g_task_new (file, cancellable, callback, user_data);
g_task_set_source_tag (task, g_file_real_make_directory_async);
g_task_set_priority (task, io_priority);
g_task_run_in_thread (task, make_directory_async_thread);
g_object_unref (task);
}
static gboolean
g_file_real_make_directory_finish (GFile *file,
GAsyncResult *res,
GError **error)
{
g_return_val_if_fail (g_task_is_valid (res, file), FALSE);
return g_task_propagate_boolean (G_TASK (res), error);
}
static void
open_readwrite_async_thread (GTask *task,
gpointer object,
gpointer task_data,
GCancellable *cancellable)
{
GFileIOStream *stream;
GError *error = NULL;
stream = g_file_open_readwrite (G_FILE (object), cancellable, &error);
if (stream == NULL)
g_task_return_error (task, error);
else
g_task_return_pointer (task, stream, g_object_unref);
}
static void
g_file_real_open_readwrite_async (GFile *file,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GTask *task;
task = g_task_new (file, cancellable, callback, user_data);
g_task_set_source_tag (task, g_file_real_open_readwrite_async);
g_task_set_priority (task, io_priority);
g_task_run_in_thread (task, open_readwrite_async_thread);
g_object_unref (task);
}
static GFileIOStream *
g_file_real_open_readwrite_finish (GFile *file,
GAsyncResult *res,
GError **error)
{
g_return_val_if_fail (g_task_is_valid (res, file), NULL);
return g_task_propagate_pointer (G_TASK (res), error);
}
static void
create_readwrite_async_thread (GTask *task,
gpointer object,
gpointer task_data,
GCancellable *cancellable)
{
GFileCreateFlags *data = task_data;
GFileIOStream *stream;
GError *error = NULL;
stream = g_file_create_readwrite (G_FILE (object), *data, cancellable, &error);
if (stream == NULL)
g_task_return_error (task, error);
else
g_task_return_pointer (task, stream, g_object_unref);
}
static void
g_file_real_create_readwrite_async (GFile *file,
GFileCreateFlags flags,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GFileCreateFlags *data;
GTask *task;
data = g_new0 (GFileCreateFlags, 1);
*data = flags;
task = g_task_new (file, cancellable, callback, user_data);
g_task_set_source_tag (task, g_file_real_create_readwrite_async);
g_task_set_task_data (task, data, g_free);
g_task_set_priority (task, io_priority);
g_task_run_in_thread (task, create_readwrite_async_thread);
g_object_unref (task);
}
static GFileIOStream *
g_file_real_create_readwrite_finish (GFile *file,
GAsyncResult *res,
GError **error)
{
g_return_val_if_fail (g_task_is_valid (res, file), NULL);
return g_task_propagate_pointer (G_TASK (res), error);
}
typedef struct {
char *etag;
gboolean make_backup;
GFileCreateFlags flags;
} ReplaceRWAsyncData;
static void
replace_rw_async_data_free (ReplaceRWAsyncData *data)
{
g_free (data->etag);
g_free (data);
}
static void
replace_readwrite_async_thread (GTask *task,
gpointer object,
gpointer task_data,
GCancellable *cancellable)
{
GFileIOStream *stream;
GError *error = NULL;
ReplaceRWAsyncData *data = task_data;
stream = g_file_replace_readwrite (G_FILE (object),
data->etag,
data->make_backup,
data->flags,
cancellable,
&error);
if (stream == NULL)
g_task_return_error (task, error);
else
g_task_return_pointer (task, stream, g_object_unref);
}
static void
g_file_real_replace_readwrite_async (GFile *file,
const char *etag,
gboolean make_backup,
GFileCreateFlags flags,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GTask *task;
ReplaceRWAsyncData *data;
data = g_new0 (ReplaceRWAsyncData, 1);
data->etag = g_strdup (etag);
data->make_backup = make_backup;
data->flags = flags;
task = g_task_new (file, cancellable, callback, user_data);
g_task_set_source_tag (task, g_file_real_replace_readwrite_async);
g_task_set_task_data (task, data, (GDestroyNotify)replace_rw_async_data_free);
g_task_set_priority (task, io_priority);
g_task_run_in_thread (task, replace_readwrite_async_thread);
g_object_unref (task);
}
static GFileIOStream *
g_file_real_replace_readwrite_finish (GFile *file,
GAsyncResult *res,
GError **error)
{
g_return_val_if_fail (g_task_is_valid (res, file), NULL);
return g_task_propagate_pointer (G_TASK (res), error);
}
static void
set_display_name_async_thread (GTask *task,
gpointer object,
gpointer task_data,
GCancellable *cancellable)
{
GError *error = NULL;
char *name = task_data;
GFile *file;
file = g_file_set_display_name (G_FILE (object), name, cancellable, &error);
if (file == NULL)
g_task_return_error (task, error);
else
g_task_return_pointer (task, file, g_object_unref);
}
static void
g_file_real_set_display_name_async (GFile *file,
const char *display_name,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GTask *task;
task = g_task_new (file, cancellable, callback, user_data);
g_task_set_source_tag (task, g_file_real_set_display_name_async);
g_task_set_task_data (task, g_strdup (display_name), g_free);
g_task_set_priority (task, io_priority);
g_task_run_in_thread (task, set_display_name_async_thread);
g_object_unref (task);
}
static GFile *
g_file_real_set_display_name_finish (GFile *file,
GAsyncResult *res,
GError **error)
{
g_return_val_if_fail (g_task_is_valid (res, file), NULL);
return g_task_propagate_pointer (G_TASK (res), error);
}
typedef struct {
GFileQueryInfoFlags flags;
GFileInfo *info;
} SetInfoAsyncData;
static void
set_info_data_free (SetInfoAsyncData *data)
{
if (data->info)
g_object_unref (data->info);
g_free (data);
}
static void
set_info_async_thread (GTask *task,
gpointer object,
gpointer task_data,
GCancellable *cancellable)
{
SetInfoAsyncData *data = task_data;
GError *error = NULL;
if (g_file_set_attributes_from_info (G_FILE (object),
data->info,
data->flags,
cancellable,
&error))
g_task_return_boolean (task, TRUE);
else
g_task_return_error (task, error);
}
static void
g_file_real_set_attributes_async (GFile *file,
GFileInfo *info,
GFileQueryInfoFlags flags,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GTask *task;
SetInfoAsyncData *data;
data = g_new0 (SetInfoAsyncData, 1);
data->info = g_file_info_dup (info);
data->flags = flags;
task = g_task_new (file, cancellable, callback, user_data);
g_task_set_source_tag (task, g_file_real_set_attributes_async);
g_task_set_task_data (task, data, (GDestroyNotify)set_info_data_free);
g_task_set_priority (task, io_priority);
g_task_run_in_thread (task, set_info_async_thread);
g_object_unref (task);
}
static gboolean
g_file_real_set_attributes_finish (GFile *file,
GAsyncResult *res,
GFileInfo **info,
GError **error)
{
SetInfoAsyncData *data;
g_return_val_if_fail (g_task_is_valid (res, file), FALSE);
data = g_task_get_task_data (G_TASK (res));
if (info)
*info = g_object_ref (data->info);
return g_task_propagate_boolean (G_TASK (res), error);
}
static void
find_enclosing_mount_async_thread (GTask *task,
gpointer object,
gpointer task_data,
GCancellable *cancellable)
{
GError *error = NULL;
GMount *mount;
mount = g_file_find_enclosing_mount (G_FILE (object), cancellable, &error);
if (mount == NULL)
g_task_return_error (task, error);
else
g_task_return_pointer (task, mount, g_object_unref);
}
static void
g_file_real_find_enclosing_mount_async (GFile *file,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GTask *task;
task = g_task_new (file, cancellable, callback, user_data);
g_task_set_source_tag (task, g_file_real_find_enclosing_mount_async);
g_task_set_priority (task, io_priority);
g_task_run_in_thread (task, find_enclosing_mount_async_thread);
g_object_unref (task);
}
static GMount *
g_file_real_find_enclosing_mount_finish (GFile *file,
GAsyncResult *res,
GError **error)
{
g_return_val_if_fail (g_task_is_valid (res, file), NULL);
return g_task_propagate_pointer (G_TASK (res), error);
}
typedef struct {
GFile *source;
GFile *destination;
GFileCopyFlags flags;
GFileProgressCallback progress_cb;
gpointer progress_cb_data;
} CopyAsyncData;
static void
copy_async_data_free (CopyAsyncData *data)
{
g_object_unref (data->source);
g_object_unref (data->destination);
g_slice_free (CopyAsyncData, data);
}
typedef struct {
CopyAsyncData *data;
goffset current_num_bytes;
goffset total_num_bytes;
} CopyProgressData;
static gboolean
copy_async_progress_in_main (gpointer user_data)
{
CopyProgressData *progress = user_data;
CopyAsyncData *data = progress->data;
data->progress_cb (progress->current_num_bytes,
progress->total_num_bytes,
data->progress_cb_data);
return FALSE;
}
static void
copy_async_progress_callback (goffset current_num_bytes,
goffset total_num_bytes,
gpointer user_data)
{
GTask *task = user_data;
CopyAsyncData *data = g_task_get_task_data (task);
CopyProgressData *progress;
progress = g_new (CopyProgressData, 1);
progress->data = data;
progress->current_num_bytes = current_num_bytes;
progress->total_num_bytes = total_num_bytes;
g_main_context_invoke_full (g_task_get_context (task),
g_task_get_priority (task),
copy_async_progress_in_main,
progress,
g_free);
}
static void
copy_async_thread (GTask *task,
gpointer source,
gpointer task_data,
GCancellable *cancellable)
{
CopyAsyncData *data = task_data;
gboolean result;
GError *error = NULL;
result = g_file_copy (data->source,
data->destination,
data->flags,
cancellable,
(data->progress_cb != NULL) ? copy_async_progress_callback : NULL,
task,
&error);
if (result)
g_task_return_boolean (task, TRUE);
else
g_task_return_error (task, error);
}
static void
g_file_real_copy_async (GFile *source,
GFile *destination,
GFileCopyFlags flags,
int io_priority,
GCancellable *cancellable,
GFileProgressCallback progress_callback,
gpointer progress_callback_data,
GAsyncReadyCallback callback,
gpointer user_data)
{
GTask *task;
CopyAsyncData *data;
data = g_slice_new (CopyAsyncData);
data->source = g_object_ref (source);
data->destination = g_object_ref (destination);
data->flags = flags;
data->progress_cb = progress_callback;
data->progress_cb_data = progress_callback_data;
task = g_task_new (source, cancellable, callback, user_data);
g_task_set_source_tag (task, g_file_real_copy_async);
g_task_set_task_data (task, data, (GDestroyNotify)copy_async_data_free);
g_task_set_priority (task, io_priority);
g_task_run_in_thread (task, copy_async_thread);
g_object_unref (task);
}
static gboolean
g_file_real_copy_finish (GFile *file,
GAsyncResult *res,
GError **error)
{
g_return_val_if_fail (g_task_is_valid (res, file), FALSE);
return g_task_propagate_boolean (G_TASK (res), error);
}
/********************************************
* Default VFS operations *
********************************************/
/**
* g_file_new_for_path:
* @path: (type filename): a string containing a relative or absolute path.
* The string must be encoded in the glib filename encoding.
*
* Constructs a #GFile for a given path. This operation never
* fails, but the returned object might not support any I/O
* operation if @path is malformed.
*
* Returns: (transfer full): a new #GFile for the given @path.
* Free the returned object with g_object_unref().
*/
GFile *
g_file_new_for_path (const char *path)
{
g_return_val_if_fail (path != NULL, NULL);
return g_vfs_get_file_for_path (g_vfs_get_default (), path);
}
/**
* g_file_new_for_uri:
* @uri: a UTF-8 string containing a URI
*
* Constructs a #GFile for a given URI. This operation never
* fails, but the returned object might not support any I/O
* operation if @uri is malformed or if the uri type is
* not supported.
*
* Returns: (transfer full): a new #GFile for the given @uri.
* Free the returned object with g_object_unref().
*/
GFile *
g_file_new_for_uri (const char *uri)
{
g_return_val_if_fail (uri != NULL, NULL);
return g_vfs_get_file_for_uri (g_vfs_get_default (), uri);
}
/**
* g_file_new_tmp:
* @tmpl: (type filename) (nullable): Template for the file
* name, as in g_file_open_tmp(), or %NULL for a default template
* @iostream: (out): on return, a #GFileIOStream for the created file
* @error: a #GError, or %NULL
*
* Opens a file in the preferred directory for temporary files (as
* returned by g_get_tmp_dir()) and returns a #GFile and
* #GFileIOStream pointing to it.
*
* @tmpl should be a string in the GLib file name encoding
* containing a sequence of six 'X' characters, and containing no
* directory components. If it is %NULL, a default template is used.
*
* Unlike the other #GFile constructors, this will return %NULL if
* a temporary file could not be created.
*
* Returns: (transfer full): a new #GFile.
* Free the returned object with g_object_unref().
*
* Since: 2.32
*/
GFile *
g_file_new_tmp (const char *tmpl,
GFileIOStream **iostream,
GError **error)
{
gint fd;
gchar *path;
GFile *file;
GFileOutputStream *output;
g_return_val_if_fail (iostream != NULL, NULL);
fd = g_file_open_tmp (tmpl, &path, error);
if (fd == -1)
return NULL;
file = g_file_new_for_path (path);
output = _g_local_file_output_stream_new (fd);
*iostream = _g_local_file_io_stream_new (G_LOCAL_FILE_OUTPUT_STREAM (output));
g_object_unref (output);
g_free (path);
return file;
}
typedef struct {
GFile *file;
GFileIOStream *iostream;
} NewTmpAsyncData;
static void
new_tmp_data_free (NewTmpAsyncData *data)
{
g_clear_object (&data->file);
g_clear_object (&data->iostream);
g_free (data);
}
static void
new_tmp_async_thread (GTask *task,
gpointer object,
gpointer task_data,
GCancellable *cancellable)
{
GFile *file;
const char *tmpl = task_data;
GFileIOStream *iostream = NULL;
GError *error = NULL;
NewTmpAsyncData *return_data;
if (g_task_return_error_if_cancelled (task))
return;
file = g_file_new_tmp (tmpl, &iostream, &error);
if (!file)
{
int error_code = G_IO_ERROR_FAILED;
if (error->domain == G_IO_ERROR)
{
g_task_return_error (task, g_steal_pointer (&error));
return;
}
if (error->domain == G_FILE_ERROR)
error_code = g_io_error_from_file_error (error->code);
g_task_return_new_error (task, G_IO_ERROR, error_code,
_("Failed to create a temporary directory for "
"template “%s”: %s"),
tmpl, error->message);
g_clear_error (&error);
return;
}
return_data = g_new0 (NewTmpAsyncData, 1);
return_data->file = g_steal_pointer (&file);
return_data->iostream = g_steal_pointer (&iostream);
g_task_return_pointer (task, g_steal_pointer (&return_data),
(GDestroyNotify) new_tmp_data_free);
}
/**
* g_file_new_tmp_async:
* @tmpl: (type filename) (nullable): Template for the file
* name, as in g_file_open_tmp(), or %NULL for a default template
* @io_priority: the [I/O priority](iface.AsyncResult.html#io-priority) of the request
* @cancellable: optional #GCancellable object, %NULL to ignore
* @callback: (nullable): a #GAsyncReadyCallback to call when the request is done
* @user_data: (nullable): data to pass to @callback
*
* Asynchronously opens a file in the preferred directory for temporary files
* (as returned by g_get_tmp_dir()) as g_file_new_tmp().
*
* @tmpl should be a string in the GLib file name encoding
* containing a sequence of six 'X' characters, and containing no
* directory components. If it is %NULL, a default template is used.
*
* Since: 2.74
*/
void
g_file_new_tmp_async (const char *tmpl,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GTask *task;
g_return_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable));
task = g_task_new (NULL, cancellable, callback, user_data);
g_task_set_source_tag (task, g_file_new_tmp_async);
g_task_set_task_data (task, g_strdup (tmpl), g_free);
g_task_set_priority (task, io_priority);
g_task_set_check_cancellable (task, TRUE);
g_task_run_in_thread (task, new_tmp_async_thread);
g_object_unref (task);
}
/**
* g_file_new_tmp_finish:
* @result: a #GAsyncResult
* @iostream: (out) (not optional) (not nullable) (transfer full): on return, a #GFileIOStream for the created file
* @error: a #GError, or %NULL
*
* Finishes a temporary file creation started by g_file_new_tmp_async().
*
* Returns: (transfer full): a new #GFile.
* Free the returned object with g_object_unref().
*
* Since: 2.74
*/
GFile *
g_file_new_tmp_finish (GAsyncResult *result,
GFileIOStream **iostream,
GError **error)
{
GFile *file;
NewTmpAsyncData *data;
g_return_val_if_fail (g_task_is_valid (result, NULL), NULL);
g_return_val_if_fail (g_task_get_source_tag (G_TASK (result)) ==
g_file_new_tmp_async, NULL);
g_return_val_if_fail (iostream != NULL, NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
data = g_task_propagate_pointer (G_TASK (result), error);
if (!data)
{
*iostream = NULL;
return NULL;
}
file = g_steal_pointer (&data->file);
*iostream = g_steal_pointer (&data->iostream);
new_tmp_data_free (data);
return file;
}
static void
new_tmp_dir_async_thread (GTask *task,
gpointer object,
gpointer task_data,
GCancellable *cancellable)
{
gchar *path;
const char *tmpl = task_data;
GError *error = NULL;
if (g_task_return_error_if_cancelled (task))
return;
path = g_dir_make_tmp (tmpl, &error);
if (!path)
{
int error_code = G_IO_ERROR_FAILED;
if (error->domain == G_IO_ERROR)
{
g_task_return_error (task, g_steal_pointer (&error));
return;
}
if (error->domain == G_FILE_ERROR)
error_code = g_io_error_from_file_error (error->code);
g_task_return_new_error (task, G_IO_ERROR, error_code,
_("Failed to create a temporary directory for "
"template “%s”: %s"),
tmpl, error->message);
g_clear_error (&error);
return;
}
g_task_return_pointer (task, g_file_new_for_path (path), g_object_unref);
g_free (path);
}
/**
* g_file_new_tmp_dir_async:
* @tmpl: (type filename) (nullable): Template for the file
* name, as in g_dir_make_tmp(), or %NULL for a default template
* @io_priority: the [I/O priority](iface.AsyncResult.html#io-priority) of the request
* @cancellable: optional #GCancellable object, %NULL to ignore
* @callback: (nullable): a #GAsyncReadyCallback to call when the request is done
* @user_data: (nullable): data to pass to @callback
*
* Asynchronously creates a directory in the preferred directory for
* temporary files (as returned by g_get_tmp_dir()) as g_dir_make_tmp().
*
* @tmpl should be a string in the GLib file name encoding
* containing a sequence of six 'X' characters, and containing no
* directory components. If it is %NULL, a default template is used.
*
* Since: 2.74
*/
void
g_file_new_tmp_dir_async (const char *tmpl,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GTask *task;
g_return_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable));
task = g_task_new (NULL, cancellable, callback, user_data);
g_task_set_source_tag (task, g_file_new_tmp_dir_async);
g_task_set_task_data (task, g_strdup (tmpl), g_free);
g_task_set_priority (task, io_priority);
g_task_set_check_cancellable (task, TRUE);
g_task_run_in_thread (task, new_tmp_dir_async_thread);
g_object_unref (task);
}
/**
* g_file_new_tmp_dir_finish:
* @result: a #GAsyncResult
* @error: a #GError, or %NULL
*
* Finishes a temporary directory creation started by
* g_file_new_tmp_dir_async().
*
* Returns: (transfer full): a new #GFile.
* Free the returned object with g_object_unref().
*
* Since: 2.74
*/
GFile *
g_file_new_tmp_dir_finish (GAsyncResult *result,
GError **error)
{
g_return_val_if_fail (g_task_is_valid (result, NULL), NULL);
g_return_val_if_fail (g_task_get_source_tag (G_TASK (result)) ==
g_file_new_tmp_dir_async, NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
return g_task_propagate_pointer (G_TASK (result), error);
}
/**
* g_file_parse_name:
* @parse_name: a file name or path to be parsed
*
* Constructs a #GFile with the given @parse_name (i.e. something
* given by g_file_get_parse_name()). This operation never fails,
* but the returned object might not support any I/O operation if
* the @parse_name cannot be parsed.
*
* Returns: (transfer full): a new #GFile.
*/
GFile *
g_file_parse_name (const char *parse_name)
{
g_return_val_if_fail (parse_name != NULL, NULL);
return g_vfs_parse_name (g_vfs_get_default (), parse_name);
}
/**
* g_file_new_build_filename:
* @first_element: (type filename): the first element in the path
* @...: remaining elements in path, terminated by %NULL
*
* Constructs a #GFile from a series of elements using the correct
* separator for filenames.
*
* Using this function is equivalent to calling g_build_filename(),
* followed by g_file_new_for_path() on the result.
*
* Returns: (transfer full): a new #GFile
*
* Since: 2.56
*/
GFile *
g_file_new_build_filename (const gchar *first_element,
...)
{
gchar *str;
GFile *file;
va_list args;
g_return_val_if_fail (first_element != NULL, NULL);
va_start (args, first_element);
str = g_build_filename_valist (first_element, &args);
va_end (args);
file = g_file_new_for_path (str);
g_free (str);
return file;
}
/**
* g_file_new_build_filenamev:
* @args: (array zero-terminated=1) (element-type filename): %NULL-terminated
* array of strings containing the path elements.
*
* Constructs a #GFile from a vector of elements using the correct
* separator for filenames.
*
* Using this function is equivalent to calling g_build_filenamev(),
* followed by g_file_new_for_path() on the result.
*
* Returns: (transfer full): a new #GFile
*
* Since: 2.78
*/
GFile *
g_file_new_build_filenamev (const gchar * const *args)
{
gchar *str;
GFile *file;
str = g_build_filenamev ((gchar **) args);
file = g_file_new_for_path (str);
g_free (str);
return file;
}
static gboolean
is_valid_scheme_character (char c)
{
return g_ascii_isalnum (c) || c == '+' || c == '-' || c == '.';
}
/* Following RFC 2396, valid schemes are built like:
* scheme = alpha *( alpha | digit | "+" | "-" | "." )
*/
static gboolean
has_valid_scheme (const char *uri)
{
const char *p;
p = uri;
if (!g_ascii_isalpha (*p))
return FALSE;
do {
p++;
} while (is_valid_scheme_character (*p));
return *p == ':';
}
static GFile *
new_for_cmdline_arg (const gchar *arg,
const gchar *cwd)
{
GFile *file;
char *filename;
if (g_path_is_absolute (arg))
return g_file_new_for_path (arg);
if (has_valid_scheme (arg))
return g_file_new_for_uri (arg);
if (cwd == NULL)
{
char *current_dir;
current_dir = g_get_current_dir ();
filename = g_build_filename (current_dir, arg, NULL);
g_free (current_dir);
}
else
filename = g_build_filename (cwd, arg, NULL);
file = g_file_new_for_path (filename);
g_free (filename);
return file;
}
/**
* g_file_new_for_commandline_arg:
* @arg: (type filename): a command line string
*
* Creates a #GFile with the given argument from the command line.
* The value of @arg can be either a URI, an absolute path or a
* relative path resolved relative to the current working directory.
* This operation never fails, but the returned object might not
* support any I/O operation if @arg points to a malformed path.
*
* Note that on Windows, this function expects its argument to be in
* UTF-8 -- not the system code page. This means that you
* should not use this function with string from argv as it is passed
* to main(). g_win32_get_command_line() will return a UTF-8 version of
* the commandline. #GApplication also uses UTF-8 but
* g_application_command_line_create_file_for_arg() may be more useful
* for you there. It is also always possible to use this function with
* #GOptionContext arguments of type %G_OPTION_ARG_FILENAME.
*
* Returns: (transfer full): a new #GFile.
* Free the returned object with g_object_unref().
*/
GFile *
g_file_new_for_commandline_arg (const char *arg)
{
g_return_val_if_fail (arg != NULL, NULL);
return new_for_cmdline_arg (arg, NULL);
}
/**
* g_file_new_for_commandline_arg_and_cwd:
* @arg: (type filename): a command line string
* @cwd: (type filename): the current working directory of the commandline
*
* Creates a #GFile with the given argument from the command line.
*
* This function is similar to g_file_new_for_commandline_arg() except
* that it allows for passing the current working directory as an
* argument instead of using the current working directory of the
* process.
*
* This is useful if the commandline argument was given in a context
* other than the invocation of the current process.
*
* See also g_application_command_line_create_file_for_arg().
*
* Returns: (transfer full): a new #GFile
*
* Since: 2.36
**/
GFile *
g_file_new_for_commandline_arg_and_cwd (const gchar *arg,
const gchar *cwd)
{
g_return_val_if_fail (arg != NULL, NULL);
g_return_val_if_fail (cwd != NULL, NULL);
return new_for_cmdline_arg (arg, cwd);
}
/**
* g_file_mount_enclosing_volume:
* @location: input #GFile
* @flags: flags affecting the operation
* @mount_operation: (nullable): a #GMountOperation
* or %NULL to avoid user interaction
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @callback: (nullable): a #GAsyncReadyCallback to call
* when the request is satisfied, or %NULL
* @user_data: the data to pass to callback function
*
* Starts a @mount_operation, mounting the volume that contains
* the file @location.
*
* When this operation has completed, @callback will be called with
* @user_user data, and the operation can be finalized with
* g_file_mount_enclosing_volume_finish().
*
* If @cancellable is not %NULL, then the operation can be cancelled by
* triggering the cancellable object from another thread. If the operation
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
*/
void
g_file_mount_enclosing_volume (GFile *location,
GMountMountFlags flags,
GMountOperation *mount_operation,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GFileIface *iface;
g_return_if_fail (G_IS_FILE (location));
iface = G_FILE_GET_IFACE (location);
if (iface->mount_enclosing_volume == NULL)
{
g_task_report_new_error (location, callback, user_data,
g_file_mount_enclosing_volume,
G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
_("volume doesn’t implement mount"));
return;
}
(* iface->mount_enclosing_volume) (location, flags, mount_operation, cancellable, callback, user_data);
}
/**
* g_file_mount_enclosing_volume_finish:
* @location: input #GFile
* @result: a #GAsyncResult
* @error: a #GError, or %NULL
*
* Finishes a mount operation started by g_file_mount_enclosing_volume().
*
* Returns: %TRUE if successful. If an error has occurred,
* this function will return %FALSE and set @error
* appropriately if present.
*/
gboolean
g_file_mount_enclosing_volume_finish (GFile *location,
GAsyncResult *result,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (location), FALSE);
g_return_val_if_fail (G_IS_ASYNC_RESULT (result), FALSE);
if (g_async_result_legacy_propagate_error (result, error))
return FALSE;
else if (g_async_result_is_tagged (result, g_file_mount_enclosing_volume))
return g_task_propagate_boolean (G_TASK (result), error);
iface = G_FILE_GET_IFACE (location);
return (* iface->mount_enclosing_volume_finish) (location, result, error);
}
/********************************************
* Utility functions *
********************************************/
/**
* g_file_query_default_handler:
* @file: a #GFile to open
* @cancellable: optional #GCancellable object, %NULL to ignore
* @error: a #GError, or %NULL
*
* Returns the #GAppInfo that is registered as the default
* application to handle the file specified by @file.
*
* If @cancellable is not %NULL, then the operation can be cancelled by
* triggering the cancellable object from another thread. If the operation
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
*
* Returns: (transfer full): a #GAppInfo if the handle was found,
* %NULL if there were errors.
* When you are done with it, release it with g_object_unref()
*/
GAppInfo *
g_file_query_default_handler (GFile *file,
GCancellable *cancellable,
GError **error)
{
char *uri_scheme;
const char *content_type;
GAppInfo *appinfo;
GFileInfo *info;
char *path;
uri_scheme = g_file_get_uri_scheme (file);
if (uri_scheme && uri_scheme[0] != '\0')
{
appinfo = g_app_info_get_default_for_uri_scheme (uri_scheme);
g_free (uri_scheme);
if (appinfo != NULL)
return appinfo;
}
else
g_free (uri_scheme);
info = g_file_query_info (file,
G_FILE_ATTRIBUTE_STANDARD_CONTENT_TYPE ","
G_FILE_ATTRIBUTE_STANDARD_FAST_CONTENT_TYPE,
0,
cancellable,
error);
if (info == NULL)
return NULL;
appinfo = NULL;
content_type = g_file_info_get_content_type (info);
if (content_type == NULL)
content_type = g_file_info_get_attribute_string (info, G_FILE_ATTRIBUTE_STANDARD_FAST_CONTENT_TYPE);
if (content_type)
{
/* Don't use is_native(), as we want to support fuse paths if available */
path = g_file_get_path (file);
appinfo = g_app_info_get_default_for_type (content_type,
path == NULL);
g_free (path);
}
g_object_unref (info);
if (appinfo != NULL)
return appinfo;
g_set_error_literal (error, G_IO_ERROR,
G_IO_ERROR_NOT_SUPPORTED,
_("No application is registered as handling this file"));
return NULL;
}
static void
query_default_handler_query_app_info_for_type_cb (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
GTask *task = G_TASK (user_data);
GAppInfo *appinfo;
GError *error = NULL;
appinfo = g_app_info_get_default_for_type_finish (result, &error);
if (appinfo != NULL)
{
g_task_return_pointer (task, g_steal_pointer (&appinfo), g_object_unref);
}
else if (g_error_matches (error, G_IO_ERROR, G_IO_ERROR_NOT_FOUND))
{
g_task_return_new_error_literal (task,
G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
error->message);
}
else
{
g_task_return_error (task, g_steal_pointer (&error));
}
g_clear_error (&error);
g_object_unref (task);
}
static void
query_default_handler_query_info_cb (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
GFile *file = G_FILE (object);
GTask *task = G_TASK (user_data);
GError *error = NULL;
GFileInfo *info;
const char *content_type;
info = g_file_query_info_finish (file, result, &error);
if (info == NULL)
{
g_task_return_error (task, g_steal_pointer (&error));
g_object_unref (task);
return;
}
content_type = g_file_info_get_content_type (info);
if (content_type == NULL)
content_type = g_file_info_get_attribute_string (info, G_FILE_ATTRIBUTE_STANDARD_FAST_CONTENT_TYPE);
if (content_type)
{
GCancellable *cancellable = g_task_get_cancellable (task);
char *path;
/* Don't use is_native(), as we want to support fuse paths if available */
path = g_file_get_path (file);
g_app_info_get_default_for_type_async (content_type,
path == NULL,
cancellable,
query_default_handler_query_app_info_for_type_cb,
g_steal_pointer (&task));
g_free (path);
}
else
{
g_task_return_new_error_literal (task,
G_IO_ERROR,
G_IO_ERROR_NOT_SUPPORTED,
_("No application is registered as handling this file"));
}
g_object_unref (info);
g_clear_object (&task);
}
static void
on_query_default_handler_for_uri_cb (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
GTask *task = user_data;
GAppInfo *app_info;
app_info = g_app_info_get_default_for_uri_scheme_finish (result, NULL);
if (app_info)
{
g_task_return_pointer (task, g_steal_pointer (&app_info), g_object_unref);
g_object_unref (task);
}
else
{
g_file_query_info_async (g_task_get_source_object (task),
G_FILE_ATTRIBUTE_STANDARD_CONTENT_TYPE ","
G_FILE_ATTRIBUTE_STANDARD_FAST_CONTENT_TYPE,
0,
g_task_get_priority (task),
g_task_get_cancellable (task),
query_default_handler_query_info_cb,
task);
}
}
/**
* g_file_query_default_handler_async:
* @file: a #GFile to open
* @io_priority: the [I/O priority](iface.AsyncResult.html#io-priority) of the request
* @cancellable: optional #GCancellable object, %NULL to ignore
* @callback: (nullable): a #GAsyncReadyCallback to call when the request is done
* @user_data: (nullable): data to pass to @callback
*
* Async version of g_file_query_default_handler().
*
* Since: 2.60
*/
void
g_file_query_default_handler_async (GFile *file,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GTask *task;
char *uri_scheme;
task = g_task_new (file, cancellable, callback, user_data);
g_task_set_source_tag (task, g_file_query_default_handler_async);
uri_scheme = g_file_get_uri_scheme (file);
if (uri_scheme && uri_scheme[0] != '\0')
{
g_app_info_get_default_for_uri_scheme_async (uri_scheme,
cancellable,
on_query_default_handler_for_uri_cb,
g_steal_pointer (&task));
g_free (uri_scheme);
return;
}
g_file_query_info_async (file,
G_FILE_ATTRIBUTE_STANDARD_CONTENT_TYPE ","
G_FILE_ATTRIBUTE_STANDARD_FAST_CONTENT_TYPE,
0,
io_priority,
cancellable,
query_default_handler_query_info_cb,
g_steal_pointer (&task));
g_free (uri_scheme);
}
/**
* g_file_query_default_handler_finish:
* @file: a #GFile to open
* @result: a #GAsyncResult
* @error: (nullable): a #GError
*
* Finishes a g_file_query_default_handler_async() operation.
*
* Returns: (transfer full): a #GAppInfo if the handle was found,
* %NULL if there were errors.
* When you are done with it, release it with g_object_unref()
*
* Since: 2.60
*/
GAppInfo *
g_file_query_default_handler_finish (GFile *file,
GAsyncResult *result,
GError **error)
{
g_return_val_if_fail (G_IS_FILE (file), NULL);
g_return_val_if_fail (g_task_is_valid (result, file), NULL);
return g_task_propagate_pointer (G_TASK (result), error);
}
#define GET_CONTENT_BLOCK_SIZE 8192
/**
* g_file_load_contents:
* @file: input #GFile
* @cancellable: optional #GCancellable object, %NULL to ignore
* @contents: (out) (transfer full) (element-type guint8) (array length=length): a location to place the contents of the file
* @length: (out) (optional): a location to place the length of the contents of the file,
* or %NULL if the length is not needed
* @etag_out: (out) (optional) (nullable): a location to place the current entity tag for the file,
* or %NULL if the entity tag is not needed
* @error: a #GError, or %NULL
*
* Loads the content of the file into memory. The data is always
* zero-terminated, but this is not included in the resultant @length.
* The returned @contents should be freed with g_free() when no longer
* needed.
*
* If @cancellable is not %NULL, then the operation can be cancelled by
* triggering the cancellable object from another thread. If the operation
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
*
* Returns: %TRUE if the @file's contents were successfully loaded.
* %FALSE if there were errors.
*/
gboolean
g_file_load_contents (GFile *file,
GCancellable *cancellable,
char **contents,
gsize *length,
char **etag_out,
GError **error)
{
GFileInputStream *in;
char *data;
gsize size;
gsize pos;
gssize res;
GFileInfo *info;
g_return_val_if_fail (G_IS_FILE (file), FALSE);
g_return_val_if_fail (contents != NULL, FALSE);
in = g_file_read (file, cancellable, error);
if (in == NULL)
return FALSE;
size = GET_CONTENT_BLOCK_SIZE;
data = g_malloc (GET_CONTENT_BLOCK_SIZE);
pos = 0;
while ((res = g_input_stream_read (G_INPUT_STREAM (in),
data + pos,
GET_CONTENT_BLOCK_SIZE,
cancellable, error)) > 0)
{
pos += res;
if (size - pos < GET_CONTENT_BLOCK_SIZE)
{
g_assert (size <= G_MAXSIZE / 2);
size *= 2;
data = g_realloc (data, size);
}
}
if (etag_out)
{
*etag_out = NULL;
info = g_file_input_stream_query_info (in,
G_FILE_ATTRIBUTE_ETAG_VALUE,
cancellable,
NULL);
if (info)
{
*etag_out = g_file_info_has_attribute (info, G_FILE_ATTRIBUTE_ETAG_VALUE) ? g_strdup (g_file_info_get_etag (info)) : NULL;
g_object_unref (info);
}
}
/* Ignore errors on close */
g_input_stream_close (G_INPUT_STREAM (in), cancellable, NULL);
g_object_unref (in);
if (res < 0)
{
/* error is set already */
g_free (data);
return FALSE;
}
if (length)
*length = pos;
/* Zero terminate (allocating extra bytes if needed) */
if (pos >= size)
data = g_realloc (data, pos + 1);
data[pos] = 0;
*contents = g_steal_pointer (&data);
return TRUE;
}
typedef struct {
GTask *task;
GFileReadMoreCallback read_more_callback;
char *data;
gsize size;
gsize pos;
char *etag;
} LoadContentsData;
static void
load_contents_data_free (LoadContentsData *data)
{
g_clear_pointer (&data->data, g_free);
g_free (data->etag);
g_free (data);
}
static void
load_contents_data_ensure_space (LoadContentsData *data,
gsize space)
{
if (data->size - data->pos < space)
{
if (data->data == NULL)
{
data->size = space;
data->data = g_malloc (space);
}
else
{
g_assert (data->size <= G_MAXSIZE / 2);
data->size *= 2;
data->data = g_realloc (data->data, data->size);
}
}
}
static void
load_contents_close_callback (GObject *obj,
GAsyncResult *close_res,
gpointer user_data)
{
GInputStream *stream = G_INPUT_STREAM (obj);
LoadContentsData *data = user_data;
/* Ignore errors here, we're only reading anyway */
g_input_stream_close_finish (stream, close_res, NULL);
g_object_unref (stream);
g_task_return_boolean (data->task, TRUE);
g_object_unref (data->task);
}
static void
load_contents_fstat_callback (GObject *obj,
GAsyncResult *stat_res,
gpointer user_data)
{
GInputStream *stream = G_INPUT_STREAM (obj);
LoadContentsData *data = user_data;
GFileInfo *info;
info = g_file_input_stream_query_info_finish (G_FILE_INPUT_STREAM (stream),
stat_res, NULL);
if (info)
{
data->etag = g_file_info_has_attribute (info, G_FILE_ATTRIBUTE_ETAG_VALUE) ? g_strdup (g_file_info_get_etag (info)) : NULL;
g_object_unref (info);
}
g_input_stream_close_async (stream, 0,
g_task_get_cancellable (data->task),
load_contents_close_callback, data);
}
static void
load_contents_read_callback (GObject *obj,
GAsyncResult *read_res,
gpointer user_data)
{
GInputStream *stream = G_INPUT_STREAM (obj);
LoadContentsData *data = user_data;
GError *error = NULL;
gssize read_size;
read_size = g_input_stream_read_finish (stream, read_res, &error);
if (read_size < 0)
{
g_task_return_error (data->task, error);
g_object_unref (data->task);
/* Close the file ignoring any error */
g_input_stream_close_async (stream, 0, NULL, NULL, NULL);
g_object_unref (stream);
}
else if (read_size == 0)
{
g_file_input_stream_query_info_async (G_FILE_INPUT_STREAM (stream),
G_FILE_ATTRIBUTE_ETAG_VALUE,
0,
g_task_get_cancellable (data->task),
load_contents_fstat_callback,
data);
}
else if (read_size > 0)
{
data->pos += read_size;
load_contents_data_ensure_space (data, GET_CONTENT_BLOCK_SIZE);
if (data->read_more_callback &&
!data->read_more_callback (data->data, data->pos,
g_async_result_get_user_data (G_ASYNC_RESULT (data->task))))
g_file_input_stream_query_info_async (G_FILE_INPUT_STREAM (stream),
G_FILE_ATTRIBUTE_ETAG_VALUE,
0,
g_task_get_cancellable (data->task),
load_contents_fstat_callback,
data);
else
g_input_stream_read_async (stream,
data->data + data->pos,
GET_CONTENT_BLOCK_SIZE,
0,
g_task_get_cancellable (data->task),
load_contents_read_callback,
data);
}
}
static void
load_contents_open_callback (GObject *obj,
GAsyncResult *open_res,
gpointer user_data)
{
GFile *file = G_FILE (obj);
GFileInputStream *stream;
LoadContentsData *data = user_data;
GError *error = NULL;
stream = g_file_read_finish (file, open_res, &error);
if (stream)
{
load_contents_data_ensure_space (data, GET_CONTENT_BLOCK_SIZE);
g_input_stream_read_async (G_INPUT_STREAM (stream),
data->data + data->pos,
GET_CONTENT_BLOCK_SIZE,
0,
g_task_get_cancellable (data->task),
load_contents_read_callback,
data);
}
else
{
g_task_return_error (data->task, error);
g_object_unref (data->task);
}
}
/**
* g_file_load_partial_contents_async: (skip)
* @file: input #GFile
* @cancellable: optional #GCancellable object, %NULL to ignore
* @read_more_callback: (scope call) (closure user_data): a
* #GFileReadMoreCallback to receive partial data
* and to specify whether further data should be read
* @callback: (scope async) (closure user_data): a #GAsyncReadyCallback to call
* when the request is satisfied
* @user_data: the data to pass to the callback functions
*
* Reads the partial contents of a file. A #GFileReadMoreCallback should
* be used to stop reading from the file when appropriate, else this
* function will behave exactly as g_file_load_contents_async(). This
* operation can be finished by g_file_load_partial_contents_finish().
*
* Users of this function should be aware that @user_data is passed to
* both the @read_more_callback and the @callback.
*
* If @cancellable is not %NULL, then the operation can be cancelled by
* triggering the cancellable object from another thread. If the operation
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
*/
void
g_file_load_partial_contents_async (GFile *file,
GCancellable *cancellable,
GFileReadMoreCallback read_more_callback,
GAsyncReadyCallback callback,
gpointer user_data)
{
LoadContentsData *data;
g_return_if_fail (G_IS_FILE (file));
data = g_new0 (LoadContentsData, 1);
data->read_more_callback = read_more_callback;
data->task = g_task_new (file, cancellable, callback, user_data);
g_task_set_source_tag (data->task, g_file_load_partial_contents_async);
g_task_set_task_data (data->task, data, (GDestroyNotify)load_contents_data_free);
g_file_read_async (file,
0,
g_task_get_cancellable (data->task),
load_contents_open_callback,
data);
}
/**
* g_file_load_partial_contents_finish:
* @file: input #GFile
* @res: a #GAsyncResult
* @contents: (out) (transfer full) (element-type guint8) (array length=length): a location to place the contents of the file
* @length: (out) (optional): a location to place the length of the contents of the file,
* or %NULL if the length is not needed
* @etag_out: (out) (optional) (nullable): a location to place the current entity tag for the file,
* or %NULL if the entity tag is not needed
* @error: a #GError, or %NULL
*
* Finishes an asynchronous partial load operation that was started
* with g_file_load_partial_contents_async(). The data is always
* zero-terminated, but this is not included in the resultant @length.
* The returned @contents should be freed with g_free() when no longer
* needed.
*
* Returns: %TRUE if the load was successful. If %FALSE and @error is
* present, it will be set appropriately.
*/
gboolean
g_file_load_partial_contents_finish (GFile *file,
GAsyncResult *res,
char **contents,
gsize *length,
char **etag_out,
GError **error)
{
GTask *task;
LoadContentsData *data;
g_return_val_if_fail (G_IS_FILE (file), FALSE);
g_return_val_if_fail (g_task_is_valid (res, file), FALSE);
g_return_val_if_fail (contents != NULL, FALSE);
task = G_TASK (res);
if (!g_task_propagate_boolean (task, error))
{
if (length)
*length = 0;
return FALSE;
}
data = g_task_get_task_data (task);
if (length)
*length = data->pos;
if (etag_out)
{
*etag_out = data->etag;
data->etag = NULL;
}
/* Zero terminate */
load_contents_data_ensure_space (data, 1);
data->data[data->pos] = 0;
*contents = g_steal_pointer (&data->data);
return TRUE;
}
/**
* g_file_load_contents_async:
* @file: input #GFile
* @cancellable: optional #GCancellable object, %NULL to ignore
* @callback: a #GAsyncReadyCallback to call when the request is satisfied
* @user_data: the data to pass to callback function
*
* Starts an asynchronous load of the @file's contents.
*
* For more details, see g_file_load_contents() which is
* the synchronous version of this call.
*
* When the load operation has completed, @callback will be called
* with @user data. To finish the operation, call
* g_file_load_contents_finish() with the #GAsyncResult returned by
* the @callback.
*
* If @cancellable is not %NULL, then the operation can be cancelled by
* triggering the cancellable object from another thread. If the operation
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
*/
void
g_file_load_contents_async (GFile *file,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
g_file_load_partial_contents_async (file,
cancellable,
NULL,
callback, user_data);
}
/**
* g_file_load_contents_finish:
* @file: input #GFile
* @res: a #GAsyncResult
* @contents: (out) (transfer full) (element-type guint8) (array length=length): a location to place the contents of the file
* @length: (out) (optional): a location to place the length of the contents of the file,
* or %NULL if the length is not needed
* @etag_out: (out) (optional) (nullable): a location to place the current entity tag for the file,
* or %NULL if the entity tag is not needed
* @error: a #GError, or %NULL
*
* Finishes an asynchronous load of the @file's contents.
* The contents are placed in @contents, and @length is set to the
* size of the @contents string. The @contents should be freed with
* g_free() when no longer needed. If @etag_out is present, it will be
* set to the new entity tag for the @file.
*
* Returns: %TRUE if the load was successful. If %FALSE and @error is
* present, it will be set appropriately.
*/
gboolean
g_file_load_contents_finish (GFile *file,
GAsyncResult *res,
char **contents,
gsize *length,
char **etag_out,
GError **error)
{
return g_file_load_partial_contents_finish (file,
res,
contents,
length,
etag_out,
error);
}
/**
* g_file_replace_contents:
* @file: input #GFile
* @contents: (element-type guint8) (array length=length): a string containing the new contents for @file
* @length: the length of @contents in bytes
* @etag: (nullable): the old [entity-tag](#entity-tags) for the document,
* or %NULL
* @make_backup: %TRUE if a backup should be created
* @flags: a set of #GFileCreateFlags
* @new_etag: (out) (optional) (nullable): a location to a new [entity tag](#entity-tags)
* for the document. This should be freed with g_free() when no longer
* needed, or %NULL
* @cancellable: optional #GCancellable object, %NULL to ignore
* @error: a #GError, or %NULL
*
* Replaces the contents of @file with @contents of @length bytes.
*
* If @etag is specified (not %NULL), any existing file must have that etag,
* or the error %G_IO_ERROR_WRONG_ETAG will be returned.
*
* If @make_backup is %TRUE, this function will attempt to make a backup
* of @file. Internally, it uses g_file_replace(), so will try to replace the
* file contents in the safest way possible. For example, atomic renames are
* used when replacing local files’ contents.
*
* If @cancellable is not %NULL, then the operation can be cancelled by
* triggering the cancellable object from another thread. If the operation
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
*
* The returned @new_etag can be used to verify that the file hasn't
* changed the next time it is saved over.
*
* Returns: %TRUE if successful. If an error has occurred, this function
* will return %FALSE and set @error appropriately if present.
*/
gboolean
g_file_replace_contents (GFile *file,
const char *contents,
gsize length,
const char *etag,
gboolean make_backup,
GFileCreateFlags flags,
char **new_etag,
GCancellable *cancellable,
GError **error)
{
GFileOutputStream *out;
gsize pos, remainder;
gssize res = -1;
gboolean ret;
g_return_val_if_fail (G_IS_FILE (file), FALSE);
g_return_val_if_fail (contents != NULL, FALSE);
out = g_file_replace (file, etag, make_backup, flags, cancellable, error);
if (out == NULL)
return FALSE;
pos = 0;
remainder = length;
while (remainder > 0 &&
(res = g_output_stream_write (G_OUTPUT_STREAM (out),
contents + pos,
MIN (remainder, GET_CONTENT_BLOCK_SIZE),
cancellable,
error)) > 0)
{
pos += res;
remainder -= res;
}
if (remainder > 0 && res < 0)
{
/* Ignore errors on close */
g_output_stream_close (G_OUTPUT_STREAM (out), cancellable, NULL);
g_object_unref (out);
/* error is set already */
return FALSE;
}
ret = g_output_stream_close (G_OUTPUT_STREAM (out), cancellable, error);
if (new_etag)
*new_etag = g_file_output_stream_get_etag (out);
g_object_unref (out);
return ret;
}
typedef struct {
GTask *task;
GBytes *content;
gsize pos;
char *etag;
gboolean failed;
} ReplaceContentsData;
static void
replace_contents_data_free (ReplaceContentsData *data)
{
g_bytes_unref (data->content);
g_free (data->etag);
g_free (data);
}
static void
replace_contents_close_callback (GObject *obj,
GAsyncResult *close_res,
gpointer user_data)
{
GOutputStream *stream = G_OUTPUT_STREAM (obj);
ReplaceContentsData *data = user_data;
/* Ignore errors here, we're only reading anyway */
g_output_stream_close_finish (stream, close_res, NULL);
if (!data->failed)
{
data->etag = g_file_output_stream_get_etag (G_FILE_OUTPUT_STREAM (stream));
g_task_return_boolean (data->task, TRUE);
}
g_object_unref (data->task);
}
static void
replace_contents_write_callback (GObject *obj,
GAsyncResult *read_res,
gpointer user_data)
{
GOutputStream *stream = G_OUTPUT_STREAM (obj);
ReplaceContentsData *data = user_data;
GError *error = NULL;
gssize write_size;
write_size = g_output_stream_write_finish (stream, read_res, &error);
if (write_size <= 0)
{
/* Error or EOF, close the file */
if (write_size < 0)
{
data->failed = TRUE;
g_task_return_error (data->task, error);
}
g_output_stream_close_async (stream, 0,
g_task_get_cancellable (data->task),
replace_contents_close_callback, data);
}
else if (write_size > 0)
{
const gchar *content;
gsize length;
content = g_bytes_get_data (data->content, &length);
data->pos += write_size;
if (data->pos >= length)
g_output_stream_close_async (stream, 0,
g_task_get_cancellable (data->task),
replace_contents_close_callback, data);
else
g_output_stream_write_async (stream,
content + data->pos,
length - data->pos,
0,
g_task_get_cancellable (data->task),
replace_contents_write_callback,
data);
}
}
static void
replace_contents_open_callback (GObject *obj,
GAsyncResult *open_res,
gpointer user_data)
{
GFile *file = G_FILE (obj);
GFileOutputStream *stream;
ReplaceContentsData *data = user_data;
GError *error = NULL;
stream = g_file_replace_finish (file, open_res, &error);
if (stream)
{
const gchar *content;
gsize length;
content = g_bytes_get_data (data->content, &length);
g_output_stream_write_async (G_OUTPUT_STREAM (stream),
content + data->pos,
length - data->pos,
0,
g_task_get_cancellable (data->task),
replace_contents_write_callback,
data);
g_object_unref (stream); /* ownership is transferred to the write_async() call above */
}
else
{
g_task_return_error (data->task, error);
g_object_unref (data->task);
}
}
/**
* g_file_replace_contents_async:
* @file: input #GFile
* @contents: (element-type guint8) (array length=length): string of contents to replace the file with
* @length: the length of @contents in bytes
* @etag: (nullable): a new [entity tag](#entity-tags) for the @file, or %NULL
* @make_backup: %TRUE if a backup should be created
* @flags: a set of #GFileCreateFlags
* @cancellable: optional #GCancellable object, %NULL to ignore
* @callback: a #GAsyncReadyCallback to call when the request is satisfied
* @user_data: the data to pass to callback function
*
* Starts an asynchronous replacement of @file with the given
* @contents of @length bytes. @etag will replace the document's
* current entity tag.
*
* When this operation has completed, @callback will be called with
* @user_user data, and the operation can be finalized with
* g_file_replace_contents_finish().
*
* If @cancellable is not %NULL, then the operation can be cancelled by
* triggering the cancellable object from another thread. If the operation
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
*
* If @make_backup is %TRUE, this function will attempt to
* make a backup of @file.
*
* Note that no copy of @contents will be made, so it must stay valid
* until @callback is called. See g_file_replace_contents_bytes_async()
* for a #GBytes version that will automatically hold a reference to the
* contents (without copying) for the duration of the call.
*/
void
g_file_replace_contents_async (GFile *file,
const char *contents,
gsize length,
const char *etag,
gboolean make_backup,
GFileCreateFlags flags,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GBytes *bytes;
bytes = g_bytes_new_static (contents, length);
g_file_replace_contents_bytes_async (file, bytes, etag, make_backup, flags,
cancellable, callback, user_data);
g_bytes_unref (bytes);
}
/**
* g_file_replace_contents_bytes_async:
* @file: input #GFile
* @contents: a #GBytes
* @etag: (nullable): a new [entity tag](#entity-tags) for the @file, or %NULL
* @make_backup: %TRUE if a backup should be created
* @flags: a set of #GFileCreateFlags
* @cancellable: optional #GCancellable object, %NULL to ignore
* @callback: a #GAsyncReadyCallback to call when the request is satisfied
* @user_data: the data to pass to callback function
*
* Same as g_file_replace_contents_async() but takes a #GBytes input instead.
* This function will keep a ref on @contents until the operation is done.
* Unlike g_file_replace_contents_async() this allows forgetting about the
* content without waiting for the callback.
*
* When this operation has completed, @callback will be called with
* @user_user data, and the operation can be finalized with
* g_file_replace_contents_finish().
*
* Since: 2.40
*/
void
g_file_replace_contents_bytes_async (GFile *file,
GBytes *contents,
const char *etag,
gboolean make_backup,
GFileCreateFlags flags,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
ReplaceContentsData *data;
g_return_if_fail (G_IS_FILE (file));
g_return_if_fail (contents != NULL);
data = g_new0 (ReplaceContentsData, 1);
data->content = g_bytes_ref (contents);
data->task = g_task_new (file, cancellable, callback, user_data);
g_task_set_source_tag (data->task, g_file_replace_contents_bytes_async);
g_task_set_task_data (data->task, data, (GDestroyNotify)replace_contents_data_free);
g_file_replace_async (file,
etag,
make_backup,
flags,
0,
g_task_get_cancellable (data->task),
replace_contents_open_callback,
data);
}
/**
* g_file_replace_contents_finish:
* @file: input #GFile
* @res: a #GAsyncResult
* @new_etag: (out) (optional) (nullable): a location of a new [entity tag](#entity-tags)
* for the document. This should be freed with g_free() when it is no
* longer needed, or %NULL
* @error: a #GError, or %NULL
*
* Finishes an asynchronous replace of the given @file. See
* g_file_replace_contents_async(). Sets @new_etag to the new entity
* tag for the document, if present.
*
* Returns: %TRUE on success, %FALSE on failure.
*/
gboolean
g_file_replace_contents_finish (GFile *file,
GAsyncResult *res,
char **new_etag,
GError **error)
{
GTask *task;
ReplaceContentsData *data;
g_return_val_if_fail (G_IS_FILE (file), FALSE);
g_return_val_if_fail (g_task_is_valid (res, file), FALSE);
task = G_TASK (res);
if (!g_task_propagate_boolean (task, error))
return FALSE;
data = g_task_get_task_data (task);
if (new_etag)
{
*new_etag = data->etag;
data->etag = NULL; /* Take ownership */
}
return TRUE;
}
gboolean
g_file_real_measure_disk_usage (GFile *file,
GFileMeasureFlags flags,
GCancellable *cancellable,
GFileMeasureProgressCallback progress_callback,
gpointer progress_data,
guint64 *disk_usage,
guint64 *num_dirs,
guint64 *num_files,
GError **error)
{
g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
"Operation not supported for the current backend.");
return FALSE;
}
typedef struct
{
GFileMeasureFlags flags;
GFileMeasureProgressCallback progress_callback;
gpointer progress_data;
} MeasureTaskData;
typedef struct
{
guint64 disk_usage;
guint64 num_dirs;
guint64 num_files;
} MeasureResult;
typedef struct
{
GFileMeasureProgressCallback callback;
gpointer user_data;
gboolean reporting;
guint64 current_size;
guint64 num_dirs;
guint64 num_files;
} MeasureProgress;
static gboolean
measure_disk_usage_invoke_progress (gpointer user_data)
{
MeasureProgress *progress = user_data;
(* progress->callback) (progress->reporting,
progress->current_size, progress->num_dirs, progress->num_files,
progress->user_data);
return FALSE;
}
static void
measure_disk_usage_progress (gboolean reporting,
guint64 current_size,
guint64 num_dirs,
guint64 num_files,
gpointer user_data)
{
MeasureProgress progress;
GTask *task = user_data;
MeasureTaskData *data;
data = g_task_get_task_data (task);
progress.callback = data->progress_callback;
progress.user_data = data->progress_data;
progress.reporting = reporting;
progress.current_size = current_size;
progress.num_dirs = num_dirs;
progress.num_files = num_files;
g_main_context_invoke_full (g_task_get_context (task),
g_task_get_priority (task),
measure_disk_usage_invoke_progress,
g_memdup2 (&progress, sizeof progress),
g_free);
}
static void
measure_disk_usage_thread (GTask *task,
gpointer source_object,
gpointer task_data,
GCancellable *cancellable)
{
MeasureTaskData *data = task_data;
GError *error = NULL;
MeasureResult result = { 0, };
if (g_file_measure_disk_usage (source_object, data->flags, cancellable,
data->progress_callback ? measure_disk_usage_progress : NULL, task,
&result.disk_usage, &result.num_dirs, &result.num_files,
&error))
g_task_return_pointer (task, g_memdup2 (&result, sizeof result), g_free);
else
g_task_return_error (task, error);
}
static void
g_file_real_measure_disk_usage_async (GFile *file,
GFileMeasureFlags flags,
gint io_priority,
GCancellable *cancellable,
GFileMeasureProgressCallback progress_callback,
gpointer progress_data,
GAsyncReadyCallback callback,
gpointer user_data)
{
MeasureTaskData data;
GTask *task;
data.flags = flags;
data.progress_callback = progress_callback;
data.progress_data = progress_data;
task = g_task_new (file, cancellable, callback, user_data);
g_task_set_source_tag (task, g_file_real_measure_disk_usage_async);
g_task_set_task_data (task, g_memdup2 (&data, sizeof data), g_free);
g_task_set_priority (task, io_priority);
g_task_run_in_thread (task, measure_disk_usage_thread);
g_object_unref (task);
}
static gboolean
g_file_real_measure_disk_usage_finish (GFile *file,
GAsyncResult *result,
guint64 *disk_usage,
guint64 *num_dirs,
guint64 *num_files,
GError **error)
{
MeasureResult *measure_result;
g_return_val_if_fail (g_task_is_valid (result, file), FALSE);
measure_result = g_task_propagate_pointer (G_TASK (result), error);
if (measure_result == NULL)
return FALSE;
if (disk_usage)
*disk_usage = measure_result->disk_usage;
if (num_dirs)
*num_dirs = measure_result->num_dirs;
if (num_files)
*num_files = measure_result->num_files;
g_free (measure_result);
return TRUE;
}
/**
* g_file_measure_disk_usage:
* @file: a #GFile
* @flags: #GFileMeasureFlags
* @cancellable: (nullable): optional #GCancellable
* @progress_callback: (nullable) (scope call): a #GFileMeasureProgressCallback
* @progress_data: user_data for @progress_callback
* @disk_usage: (out) (optional): the number of bytes of disk space used
* @num_dirs: (out) (optional): the number of directories encountered
* @num_files: (out) (optional): the number of non-directories encountered
* @error: (nullable): %NULL, or a pointer to a %NULL #GError pointer
*
* Recursively measures the disk usage of @file.
*
* This is essentially an analog of the 'du' command, but it also
* reports the number of directories and non-directory files encountered
* (including things like symbolic links).
*
* By default, errors are only reported against the toplevel file
* itself. Errors found while recursing are silently ignored, unless
* %G_FILE_MEASURE_REPORT_ANY_ERROR is given in @flags.
*
* The returned size, @disk_usage, is in bytes and should be formatted
* with g_format_size() in order to get something reasonable for showing
* in a user interface.
*
* @progress_callback and @progress_data can be given to request
* periodic progress updates while scanning. See the documentation for
* #GFileMeasureProgressCallback for information about when and how the
* callback will be invoked.
*
* Returns: %TRUE if successful, with the out parameters set.
* %FALSE otherwise, with @error set.
*
* Since: 2.38
**/
gboolean
g_file_measure_disk_usage (GFile *file,
GFileMeasureFlags flags,
GCancellable *cancellable,
GFileMeasureProgressCallback progress_callback,
gpointer progress_data,
guint64 *disk_usage,
guint64 *num_dirs,
guint64 *num_files,
GError **error)
{
g_return_val_if_fail (G_IS_FILE (file), FALSE);
g_return_val_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable), FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
return G_FILE_GET_IFACE (file)->measure_disk_usage (file, flags, cancellable,
progress_callback, progress_data,
disk_usage, num_dirs, num_files,
error);
}
/**
* g_file_measure_disk_usage_async:
* @file: a #GFile
* @flags: #GFileMeasureFlags
* @io_priority: the [I/O priority](iface.AsyncResult.html#io-priority) of the request
* @cancellable: (nullable): optional #GCancellable
* @progress_callback: (nullable): a #GFileMeasureProgressCallback
* @progress_data: user_data for @progress_callback
* @callback: (nullable): a #GAsyncReadyCallback to call when complete
* @user_data: the data to pass to callback function
*
* Recursively measures the disk usage of @file.
*
* This is the asynchronous version of g_file_measure_disk_usage(). See
* there for more information.
*
* Since: 2.38
**/
void
g_file_measure_disk_usage_async (GFile *file,
GFileMeasureFlags flags,
gint io_priority,
GCancellable *cancellable,
GFileMeasureProgressCallback progress_callback,
gpointer progress_data,
GAsyncReadyCallback callback,
gpointer user_data)
{
g_return_if_fail (G_IS_FILE (file));
g_return_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable));
G_FILE_GET_IFACE (file)->measure_disk_usage_async (file, flags, io_priority, cancellable,
progress_callback, progress_data,
callback, user_data);
}
/**
* g_file_measure_disk_usage_finish:
* @file: a #GFile
* @result: the #GAsyncResult passed to your #GAsyncReadyCallback
* @disk_usage: (out) (optional): the number of bytes of disk space used
* @num_dirs: (out) (optional): the number of directories encountered
* @num_files: (out) (optional): the number of non-directories encountered
* @error: (nullable): %NULL, or a pointer to a %NULL #GError pointer
*
* Collects the results from an earlier call to
* g_file_measure_disk_usage_async(). See g_file_measure_disk_usage() for
* more information.
*
* Returns: %TRUE if successful, with the out parameters set.
* %FALSE otherwise, with @error set.
*
* Since: 2.38
**/
gboolean
g_file_measure_disk_usage_finish (GFile *file,
GAsyncResult *result,
guint64 *disk_usage,
guint64 *num_dirs,
guint64 *num_files,
GError **error)
{
g_return_val_if_fail (G_IS_FILE (file), FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
return G_FILE_GET_IFACE (file)->measure_disk_usage_finish (file, result, disk_usage, num_dirs, num_files, error);
}
/**
* g_file_start_mountable:
* @file: input #GFile
* @flags: flags affecting the operation
* @start_operation: (nullable): a #GMountOperation, or %NULL to avoid user interaction
* @cancellable: (nullable): optional #GCancellable object, %NULL to ignore
* @callback: (nullable): a #GAsyncReadyCallback to call when the request is satisfied, or %NULL
* @user_data: the data to pass to callback function
*
* Starts a file of type %G_FILE_TYPE_MOUNTABLE.
* Using @start_operation, you can request callbacks when, for instance,
* passwords are needed during authentication.
*
* If @cancellable is not %NULL, then the operation can be cancelled by
* triggering the cancellable object from another thread. If the operation
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
*
* When the operation is finished, @callback will be called.
* You can then call g_file_mount_mountable_finish() to get
* the result of the operation.
*
* Since: 2.22
*/
void
g_file_start_mountable (GFile *file,
GDriveStartFlags flags,
GMountOperation *start_operation,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GFileIface *iface;
g_return_if_fail (G_IS_FILE (file));
iface = G_FILE_GET_IFACE (file);
if (iface->start_mountable == NULL)
{
g_task_report_new_error (file, callback, user_data,
g_file_start_mountable,
G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
_("Operation not supported"));
return;
}
(* iface->start_mountable) (file,
flags,
start_operation,
cancellable,
callback,
user_data);
}
/**
* g_file_start_mountable_finish:
* @file: input #GFile
* @result: a #GAsyncResult
* @error: a #GError, or %NULL
*
* Finishes a start operation. See g_file_start_mountable() for details.
*
* Finish an asynchronous start operation that was started
* with g_file_start_mountable().
*
* Returns: %TRUE if the operation finished successfully. %FALSE
* otherwise.
*
* Since: 2.22
*/
gboolean
g_file_start_mountable_finish (GFile *file,
GAsyncResult *result,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), FALSE);
g_return_val_if_fail (G_IS_ASYNC_RESULT (result), FALSE);
if (g_async_result_legacy_propagate_error (result, error))
return FALSE;
else if (g_async_result_is_tagged (result, g_file_start_mountable))
return g_task_propagate_boolean (G_TASK (result), error);
iface = G_FILE_GET_IFACE (file);
return (* iface->start_mountable_finish) (file, result, error);
}
/**
* g_file_stop_mountable:
* @file: input #GFile
* @flags: flags affecting the operation
* @mount_operation: (nullable): a #GMountOperation,
* or %NULL to avoid user interaction.
* @cancellable: (nullable): optional #GCancellable object,
* %NULL to ignore
* @callback: (nullable): a #GAsyncReadyCallback to call
* when the request is satisfied, or %NULL
* @user_data: the data to pass to callback function
*
* Stops a file of type %G_FILE_TYPE_MOUNTABLE.
*
* If @cancellable is not %NULL, then the operation can be cancelled by
* triggering the cancellable object from another thread. If the operation
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
*
* When the operation is finished, @callback will be called.
* You can then call g_file_stop_mountable_finish() to get
* the result of the operation.
*
* Since: 2.22
*/
void
g_file_stop_mountable (GFile *file,
GMountUnmountFlags flags,
GMountOperation *mount_operation,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GFileIface *iface;
g_return_if_fail (G_IS_FILE (file));
iface = G_FILE_GET_IFACE (file);
if (iface->stop_mountable == NULL)
{
g_task_report_new_error (file, callback, user_data,
g_file_stop_mountable,
G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
_("Operation not supported"));
return;
}
(* iface->stop_mountable) (file,
flags,
mount_operation,
cancellable,
callback,
user_data);
}
/**
* g_file_stop_mountable_finish:
* @file: input #GFile
* @result: a #GAsyncResult
* @error: a #GError, or %NULL
*
* Finishes a stop operation, see g_file_stop_mountable() for details.
*
* Finish an asynchronous stop operation that was started
* with g_file_stop_mountable().
*
* Returns: %TRUE if the operation finished successfully.
* %FALSE otherwise.
*
* Since: 2.22
*/
gboolean
g_file_stop_mountable_finish (GFile *file,
GAsyncResult *result,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), FALSE);
g_return_val_if_fail (G_IS_ASYNC_RESULT (result), FALSE);
if (g_async_result_legacy_propagate_error (result, error))
return FALSE;
else if (g_async_result_is_tagged (result, g_file_stop_mountable))
return g_task_propagate_boolean (G_TASK (result), error);
iface = G_FILE_GET_IFACE (file);
return (* iface->stop_mountable_finish) (file, result, error);
}
/**
* g_file_poll_mountable:
* @file: input #GFile
* @cancellable: optional #GCancellable object, %NULL to ignore
* @callback: (nullable): a #GAsyncReadyCallback to call
* when the request is satisfied, or %NULL
* @user_data: the data to pass to callback function
*
* Polls a file of type %G_FILE_TYPE_MOUNTABLE.
*
* If @cancellable is not %NULL, then the operation can be cancelled by
* triggering the cancellable object from another thread. If the operation
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
*
* When the operation is finished, @callback will be called.
* You can then call g_file_mount_mountable_finish() to get
* the result of the operation.
*
* Since: 2.22
*/
void
g_file_poll_mountable (GFile *file,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GFileIface *iface;
g_return_if_fail (G_IS_FILE (file));
iface = G_FILE_GET_IFACE (file);
if (iface->poll_mountable == NULL)
{
g_task_report_new_error (file, callback, user_data,
g_file_poll_mountable,
G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
_("Operation not supported"));
return;
}
(* iface->poll_mountable) (file,
cancellable,
callback,
user_data);
}
/**
* g_file_poll_mountable_finish:
* @file: input #GFile
* @result: a #GAsyncResult
* @error: a #GError, or %NULL
*
* Finishes a poll operation. See g_file_poll_mountable() for details.
*
* Finish an asynchronous poll operation that was polled
* with g_file_poll_mountable().
*
* Returns: %TRUE if the operation finished successfully. %FALSE
* otherwise.
*
* Since: 2.22
*/
gboolean
g_file_poll_mountable_finish (GFile *file,
GAsyncResult *result,
GError **error)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), FALSE);
g_return_val_if_fail (G_IS_ASYNC_RESULT (result), FALSE);
if (g_async_result_legacy_propagate_error (result, error))
return FALSE;
else if (g_async_result_is_tagged (result, g_file_poll_mountable))
return g_task_propagate_boolean (G_TASK (result), error);
iface = G_FILE_GET_IFACE (file);
return (* iface->poll_mountable_finish) (file, result, error);
}
/**
* g_file_supports_thread_contexts:
* @file: a #GFile
*
* Checks if @file supports
* [thread-default contexts][g-main-context-push-thread-default-context].
* If this returns %FALSE, you cannot perform asynchronous operations on
* @file in a thread that has a thread-default context.
*
* Returns: Whether or not @file supports thread-default contexts.
*
* Since: 2.22
*/
gboolean
g_file_supports_thread_contexts (GFile *file)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), FALSE);
iface = G_FILE_GET_IFACE (file);
return iface->supports_thread_contexts;
}
/**
* g_file_load_bytes:
* @file: a #GFile
* @cancellable: (nullable): a #GCancellable or %NULL
* @etag_out: (out) (nullable) (optional): a location to place the current
* entity tag for the file, or %NULL if the entity tag is not needed
* @error: a location for a #GError or %NULL
*
* Loads the contents of @file and returns it as #GBytes.
*
* If @file is a resource:// based URI, the resulting bytes will reference the
* embedded resource instead of a copy. Otherwise, this is equivalent to calling
* g_file_load_contents() and g_bytes_new_take().
*
* For resources, @etag_out will be set to %NULL.
*
* The data contained in the resulting #GBytes is always zero-terminated, but
* this is not included in the #GBytes length. The resulting #GBytes should be
* freed with g_bytes_unref() when no longer in use.
*
* Returns: (transfer full): a #GBytes or %NULL and @error is set
*
* Since: 2.56
*/
GBytes *
g_file_load_bytes (GFile *file,
GCancellable *cancellable,
gchar **etag_out,
GError **error)
{
gchar *contents;
gsize len;
g_return_val_if_fail (G_IS_FILE (file), NULL);
g_return_val_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable), NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
if (etag_out != NULL)
*etag_out = NULL;
if (g_file_has_uri_scheme (file, "resource"))
{
GBytes *bytes;
gchar *uri, *unescaped;
uri = g_file_get_uri (file);
unescaped = g_uri_unescape_string (uri + strlen ("resource://"), NULL);
g_free (uri);
bytes = g_resources_lookup_data (unescaped, G_RESOURCE_LOOKUP_FLAGS_NONE, error);
g_free (unescaped);
return bytes;
}
/* contents is guaranteed to be \0 terminated */
if (g_file_load_contents (file, cancellable, &contents, &len, etag_out, error))
return g_bytes_new_take (g_steal_pointer (&contents), len);
return NULL;
}
static void
g_file_load_bytes_cb (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
GFile *file = G_FILE (object);
GTask *task = user_data;
GError *error = NULL;
gchar *etag = NULL;
gchar *contents = NULL;
gsize len = 0;
g_file_load_contents_finish (file, result, &contents, &len, &etag, &error);
g_task_set_task_data (task, g_steal_pointer (&etag), g_free);
if (error != NULL)
g_task_return_error (task, g_steal_pointer (&error));
else
g_task_return_pointer (task,
g_bytes_new_take (g_steal_pointer (&contents), len),
(GDestroyNotify)g_bytes_unref);
g_object_unref (task);
}
/**
* g_file_load_bytes_async:
* @file: a #GFile
* @cancellable: (nullable): a #GCancellable or %NULL
* @callback: (scope async) (closure user_data): a #GAsyncReadyCallback
* to call when the request is satisfied
* @user_data: the data to pass to callback function
*
* Asynchronously loads the contents of @file as #GBytes.
*
* If @file is a resource:// based URI, the resulting bytes will reference the
* embedded resource instead of a copy. Otherwise, this is equivalent to calling
* g_file_load_contents_async() and g_bytes_new_take().
*
* @callback should call g_file_load_bytes_finish() to get the result of this
* asynchronous operation.
*
* See g_file_load_bytes() for more information.
*
* Since: 2.56
*/
void
g_file_load_bytes_async (GFile *file,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GError *error = NULL;
GBytes *bytes;
GTask *task;
g_return_if_fail (G_IS_FILE (file));
g_return_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable));
task = g_task_new (file, cancellable, callback, user_data);
g_task_set_source_tag (task, g_file_load_bytes_async);
if (!g_file_has_uri_scheme (file, "resource"))
{
g_file_load_contents_async (file,
cancellable,
g_file_load_bytes_cb,
g_steal_pointer (&task));
return;
}
bytes = g_file_load_bytes (file, cancellable, NULL, &error);
if (bytes == NULL)
g_task_return_error (task, g_steal_pointer (&error));
else
g_task_return_pointer (task,
g_steal_pointer (&bytes),
(GDestroyNotify)g_bytes_unref);
g_object_unref (task);
}
/**
* g_file_load_bytes_finish:
* @file: a #GFile
* @result: a #GAsyncResult provided to the callback
* @etag_out: (out) (nullable) (optional): a location to place the current
* entity tag for the file, or %NULL if the entity tag is not needed
* @error: a location for a #GError, or %NULL
*
* Completes an asynchronous request to g_file_load_bytes_async().
*
* For resources, @etag_out will be set to %NULL.
*
* The data contained in the resulting #GBytes is always zero-terminated, but
* this is not included in the #GBytes length. The resulting #GBytes should be
* freed with g_bytes_unref() when no longer in use.
*
* See g_file_load_bytes() for more information.
*
* Returns: (transfer full): a #GBytes or %NULL and @error is set
*
* Since: 2.56
*/
GBytes *
g_file_load_bytes_finish (GFile *file,
GAsyncResult *result,
gchar **etag_out,
GError **error)
{
GBytes *bytes;
g_return_val_if_fail (G_IS_FILE (file), NULL);
g_return_val_if_fail (G_IS_TASK (result), NULL);
g_return_val_if_fail (g_task_is_valid (G_TASK (result), file), NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
bytes = g_task_propagate_pointer (G_TASK (result), error);
if (etag_out != NULL)
*etag_out = g_strdup (g_task_get_task_data (G_TASK (result)));
return bytes;
}
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