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glib/gio/gfile.c
Murray Cumming 0108d39d02 Fixed some minor typos in the documentation. 
2008-01-18  Murray Cumming  <murrayc@murrayc.com>

* gappinfo.c:
* gcancellable.c:
* gfile.c: Fixed some minor typos in the 
documentation. 

svn path=/trunk/; revision=6331
2008-01-18 09:41:09 +00:00

5080 lines
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/* GIO - GLib Input, Output and Streaming Library
*
* Copyright (C) 2006-2007 Red Hat, Inc.
*
* 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 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, write to the
* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*
* Author: Alexander Larsson <alexl@redhat.com>
*/
#include <config.h>
#include <string.h>
#include <sys/types.h>
#ifdef HAVE_PWD_H
#include <pwd.h>
#endif
#include "gfile.h"
#include "gvfs.h"
#include "gioscheduler.h"
#include <glocalfile.h>
#include "gsimpleasyncresult.h"
#include "gfileattribute-priv.h"
#include "gpollfilemonitor.h"
#include "glibintl.h"
#include "gioalias.h"
/**
* SECTION:gfile
* @short_description: File and Directory Handling
* @include: gio.h
* @see_also: #GFileInfo, #GFileEnumerator
*
* #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 a handle to a file. All
* file I/O is implemented as streaming operations (see #GInputStream and
* #GOutputStream).
*
* To construct a #GFile, you can use:
* g_file_new_for_path() if you have a path.
* g_file_new_for_uri() if you have a URI.
* g_file_new_for_commandline_arg() for a command line argument.
*
* You can move through the file system with #GFile handles with
* g_file_get_parent() to get a handle to the parent directory.
* g_file_get_child() to get a handle to a child within a directory.
* g_file_resolve_relative_path() to resolve a relative path between
* two #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 #GAsyncReadyCallback which is then used to finalize
* the operation, producing a GAsyncResult which is then passed to the
* function's matching _finish()
* operation.
*
* Some #GFile operations do not have synchronous analogs, as they may
* take a very long time to finish, and blocking may leave an application
* unusable. Notable cases include:
* g_file_mount_mountable() to mount a mountable file.
* g_file_unmount_mountable() to unmount a mountable file.
* g_file_eject_mountable() to eject a mountable file.
*
* <para id="gfile-etag"><indexterm><primary>entity tag</primary></indexterm>
* 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
* <ulink url="http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html">specification</ulink>
* for HTTP Etag headers, which are a very similar concept.
* </para>
**/
static void g_file_base_init (gpointer g_class);
static void g_file_class_init (gpointer g_class,
gpointer class_data);
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_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 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);
GType
g_file_get_type (void)
{
static GType file_type = 0;
if (! file_type)
{
static const GTypeInfo file_info =
{
sizeof (GFileIface), /* class_size */
g_file_base_init, /* base_init */
NULL, /* base_finalize */
g_file_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
0,
0, /* n_preallocs */
NULL
};
file_type =
g_type_register_static (G_TYPE_INTERFACE, I_("GFile"),
&file_info, 0);
g_type_interface_add_prerequisite (file_type, G_TYPE_OBJECT);
}
return file_type;
}
static void
g_file_class_init (gpointer g_class,
gpointer class_data)
{
GFileIface *iface = g_class;
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->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->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;
}
static void
g_file_base_init (gpointer g_class)
{
}
/**
* g_file_is_native:
* @file: input #GFile.
*
* Checks to see if a file is native to the platform.
*
* A native file s 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:
* <programlisting>
* URI = scheme ":" hier-part [ "?" query ] [ "#" fragment ]
* </programlisting>
* Common schemes include "file", "http", "ftp", etc.
*
* This call does no blocking i/o.
*
* Returns: a string containing the URI scheme for the given
* #GFile. 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:
* @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).
*
* This call does no blocking i/o.
*
* Returns: 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:
* @file: input #GFile.
*
* Gets the local pathname for #GFile, if one exists.
*
* This call does no blocking i/o.
*
* Returns: 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);
}
/**
* 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.
* 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
* string in a user interface, like in a location entry.
*
* For local files with names that can safely be converted
* to UTF8 the pathname is used, otherwise the IRI is used
* (a form of URI that allows UTF8 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.
*
* This call does no blocking i/o.
*
* Returns: #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:
* @file: #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 equality of two given #GFile<!-- -->s
*
* This call does no blocking i/o.
*
* Returns: %TRUE if @file1 and @file2 are equal.
* %FALSE if either is not a #GFile.
**/
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 (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: a #GFile structure to the parent of the given
* #GFile or %NULL if there is no parent.
**/
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_get_child:
* @file: input #GFile.
* @name: string containing the child's name.
*
* Gets a specific child of @file with name 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: a #GFile to a child specified by @name.
**/
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);
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: #GError.
*
* Gets the child of @file for a given @display_name (i.e. a UTF8
* 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: a #GFile to the specified child, or
* %NULL if the display name couldn't be converted.
**/
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_contains_file:
* @parent: input #GFile.
* @descendant: input #GFile.
*
* Checks whether @parent (recursively) contains the specified @descendant.
*
* This call does no blocking i/o.
*
* Returns: %TRUE if the @descendant's parent, grandparent, etc is @parent. %FALSE otherwise.
**/
gboolean
g_file_contains_file (GFile *parent,
GFile *descendant)
{
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (parent), FALSE);
g_return_val_if_fail (G_IS_FILE (descendant), FALSE);
if (G_TYPE_FROM_INSTANCE (parent) != G_TYPE_FROM_INSTANCE (descendant))
return FALSE;
iface = G_FILE_GET_IFACE (parent);
return (* iface->contains_file) (parent, descendant);
}
/**
* g_file_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: string with the relative path from @descendant
* to @parent, or %NULL if @descendant is not a descendant of @parent. 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: a given relative path string.
*
* Resolves a relative path for @file to an absolute path.
*
* This call does no blocking i/o.
*
* Returns: #GFile to the resolved path. %NULL if @relative_path
* is %NULL or if @file is invalid.
**/
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: 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 @attribute 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. @attribute should
* be a comma-separated list of attribute 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.
*
* 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_FILE_ERROR_NOTDIR error will be returned.
* Other errors are possible too.
*
* Returns: A #GFileEnumerator if successful, %NULL on error.
**/
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 (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 <link linkend="io-priority">I/O priority</link>
* of the request.
* @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
*
* 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: a #GFileEnumerator or %NULL if an error occurred.
**/
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_IS_SIMPLE_ASYNC_RESULT (res))
{
GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (res);
if (g_simple_async_result_propagate_error (simple, 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: 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 existance
* and then execute something based on the outcome of that, because the
* file might have been created or removed inbetween 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, create 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 an G_IO_ERROR_EXISTS error.
*
* However, in many cases an existance 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
* and 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;
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_info:
* @file: input #GFile.
* @attributes: an attribute query string.
* @flags: a set of #GFileQueryInfoFlags.
* @cancellable: optional #GCancellable object, %NULL to ignore.
* @error: a #GError.
*
* Gets the requested information about specified @file. The result
* is a #GFileInfo objects that contains key-value attributes (like type or size
* for the file.
*
* The @attribute 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. @attribute should
* be a comma-separated list of attribute 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 points 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: a #GFileInfo for the given @file, or %NULL on error.
**/
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 (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 <link linkend="io-priority">I/O priority</link>
* of the request.
* @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
*
* Asynchronously gets the requested information about specified @file. The result
* is a #GFileInfo objects 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: #GFileInfo for given @file or %NULL on error.
**/
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_IS_SIMPLE_ASYNC_RESULT (res))
{
GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (res);
if (g_simple_async_result_propagate_error (simple, 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: 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 @attribute 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. @attribute should
* be a comma-separated list of attribute or attribute wildcards. The wildcard "*"
* means all attributes, and a wildcard like "fs:*" means all attributes in the fs
* namespace. The standard namespace for filesystem attributes is "fs".
* 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: a #GFileInfo or %NULL if there was an error.
**/
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 (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_find_enclosing_mount:
* @file: input #GFile.
* @cancellable: optional #GCancellable object, %NULL to ignore.
* @error: a #GError.
*
* Gets a #GMount for the #GFile.
*
* If the #GFileIface for @file does not have a mount (e.g. possibly a
* remote share), @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: a #GMount where the @file is located or %NULL on error.
**/
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 (error, G_IO_ERROR,
G_IO_ERROR_NOT_FOUND,
_("Containing mount does not exist"));
return NULL;
}
return (* iface->find_enclosing_mount) (file, cancellable, error);
}
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);
}
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_IS_SIMPLE_ASYNC_RESULT (res))
{
GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (res);
if (g_simple_async_result_propagate_error (simple, error))
return NULL;
}
iface = G_FILE_GET_IFACE (file);
return (* iface->find_enclosing_mount_finish) (file, res, error);
}
/**
* g_file_read:
* @file: #GFile to read.
* @cancellable: 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: #GFileInputStream or %NULL on error.
**/
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 (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: 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: a #GFileOutputStream.
**/
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 (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: 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 exists.
*
* 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 with this name already exists the G_IO_ERROR_EXISTS error
* will be returned. If the file is a directory the G_IO_ERROR_IS_DIRECTORY
* 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: a #GFileOutputStream for the newly created file, or
* %NULL on error.
**/
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 (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: an optional <link linkend="gfile-etag">entity tag</link> for the
* current #GFile, or #NULL to ignore.
* @make_backup: %TRUE if a backup should be created.
* @flags: a set of #GFileCreateFlags.
* @cancellable: 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.
*
* 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, 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: a #GFileOutputStream or %NULL on error.
**/
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 (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_read_async:
* @file: input #GFile.
* @io_priority: the <link linkend="io-priority">I/O priority</link>
* of the request.
* @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
*
* 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: a #GFileInputStream or %NULL on error.
**/
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_IS_SIMPLE_ASYNC_RESULT (res))
{
GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (res);
if (g_simple_async_result_propagate_error (simple, 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 <link linkend="io-priority">I/O priority</link>
* of the request.
* @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
*
* 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: a valid #GFileOutputStream or %NULL on error.
**/
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_IS_SIMPLE_ASYNC_RESULT (res))
{
GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (res);
if (g_simple_async_result_propagate_error (simple, 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 <link linkend="io-priority">I/O priority</link>
* of the request.
* @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
*
* Asynchronously creates a new file and returns an output stream for writing to it.
* The file must not already exists.
*
* 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: a #GFileOutputStream or %NULL on error.
**/
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_IS_SIMPLE_ASYNC_RESULT (res))
{
GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (res);
if (g_simple_async_result_propagate_error (simple, error))
return NULL;
}
iface = G_FILE_GET_IFACE (file);
return (* iface->create_finish) (file, res, error);
}
/**
* g_file_replace_async:
* @file: input #GFile.
* @etag: an <link linkend="gfile-etag">entity tag</link> 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 <link linkend="io-priority">I/O priority</link>
* of the request.
* @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
*
* 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: a #GFileOutputStream, or %NULL on error.
**/
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_IS_SIMPLE_ASYNC_RESULT (res))
{
GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (res);
if (g_simple_async_result_propagate_error (simple, error))
return NULL;
}
iface = G_FILE_GET_IFACE (file);
return (* iface->replace_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_error_free (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 (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 GInputStream *
open_source_for_copy (GFile *source,
GFile *destination,
GFileCopyFlags flags,
GCancellable *cancellable,
GError **error)
{
GError *my_error;
GInputStream *in;
GFileInfo *info;
GFileType file_type;
my_error = NULL;
in = (GInputStream *)g_file_read (source, cancellable, &my_error);
if (in != NULL)
return in;
/* 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)
{
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 (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 (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)
*/
if (my_error->domain != G_IO_ERROR && my_error->code != G_IO_ERROR_NOT_FOUND)
{
g_propagate_error (error, my_error);
return NULL;
}
g_error_free (my_error);
}
g_set_error (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 as_move)
{
if (as_move)
return info->flags & G_FILE_ATTRIBUTE_INFO_COPY_WHEN_MOVED;
return info->flags & G_FILE_ATTRIBUTE_INFO_COPY_WITH_FILE;
}
static char *
build_attribute_list_for_copy (GFileAttributeInfoList *attributes,
GFileAttributeInfoList *namespaces,
gboolean as_move)
{
GString *s;
gboolean first;
int i;
first = TRUE;
s = g_string_new ("");
if (attributes)
{
for (i = 0; i < attributes->n_infos; i++)
{
if (should_copy (&attributes->infos[i], as_move))
{
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], as_move))
{
if (first)
first = FALSE;
else
g_string_append_c (s, ',');
g_string_append (s, namespaces->infos[i].name);
g_string_append (s, ":*");
}
}
}
return g_string_free (s, FALSE);
}
/**
* g_file_copy_attributes:
* @source: a #GFile with attributes.
* @destination: a #GFile to copy attributes to.
* @flags: a set of #GFileCopyFlags.
* @cancellable: 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. mtime). However
* if #G_FILE_COPY_ALL_METADATA is specified in @flags, then
* all the metadata that is possible to copy is copied.
*
* 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)
{
GFileAttributeInfoList *attributes, *namespaces;
char *attrs_to_read;
gboolean res;
GFileInfo *info;
gboolean as_move;
gboolean source_nofollow_symlinks;
as_move = flags & G_FILE_COPY_ALL_METADATA;
source_nofollow_symlinks = flags & G_FILE_COPY_NOFOLLOW_SYMLINKS;
/* Ignore errors here, if the target supports no attributes there is nothing to copy */
attributes = g_file_query_settable_attributes (destination, cancellable, NULL);
namespaces = g_file_query_writable_namespaces (destination, cancellable, NULL);
if (attributes == NULL && namespaces == NULL)
return TRUE;
attrs_to_read = build_attribute_list_for_copy (attributes, namespaces, as_move);
/* 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, 0,
cancellable,
error);
g_object_unref (info);
}
g_file_attribute_info_list_unref (attributes);
g_file_attribute_info_list_unref (namespaces);
return res;
}
/* Closes the streams */
static gboolean
copy_stream_with_progress (GInputStream *in,
GOutputStream *out,
GCancellable *cancellable,
GFileProgressCallback progress_callback,
gpointer progress_callback_data,
GError **error)
{
gssize n_read, n_written;
goffset current_size;
char buffer[8192], *p;
gboolean res;
goffset total_size;
GFileInfo *info;
total_size = 0;
info = g_file_input_stream_query_info (G_FILE_INPUT_STREAM (in),
G_FILE_ATTRIBUTE_STANDARD_SIZE,
cancellable, NULL);
if (info)
{
total_size = g_file_info_get_size (info);
g_object_unref (info);
}
current_size = 0;
res = TRUE;
while (TRUE)
{
n_read = g_input_stream_read (in, buffer, sizeof (buffer), cancellable, error);
if (n_read == -1)
{
res = FALSE;
break;
}
if (n_read == 0)
break;
current_size += n_read;
p = buffer;
while (n_read > 0)
{
n_written = g_output_stream_write (out, p, n_read, cancellable, error);
if (n_written == -1)
{
res = FALSE;
break;
}
p += n_written;
n_read -= n_written;
}
if (!res)
break;
if (progress_callback)
progress_callback (current_size, total_size, progress_callback_data);
}
if (!res)
error = NULL; /* Ignore further errors */
/* Make sure we send full copied size */
if (progress_callback)
progress_callback (current_size, total_size, progress_callback_data);
/* Don't care about errors in source here */
g_input_stream_close (in, cancellable, NULL);
/* But write errors on close are bad! */
if (!g_output_stream_close (out, cancellable, error))
res = FALSE;
g_object_unref (in);
g_object_unref (out);
return res;
}
static gboolean
file_copy_fallback (GFile *source,
GFile *destination,
GFileCopyFlags flags,
GCancellable *cancellable,
GFileProgressCallback progress_callback,
gpointer progress_callback_data,
GError **error)
{
GInputStream *in;
GOutputStream *out;
GFileInfo *info;
const char *target;
/* Maybe copy the symlink? */
if (flags & G_FILE_COPY_NOFOLLOW_SYMLINKS)
{
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 == NULL)
return FALSE;
if (g_file_info_get_file_type (info) == G_FILE_TYPE_SYMBOLIC_LINK &&
(target = g_file_info_get_symlink_target (info)) != NULL)
{
if (!copy_symlink (destination, flags, cancellable, target, error))
{
g_object_unref (info);
return FALSE;
}
g_object_unref (info);
goto copied_file;
}
g_object_unref (info);
}
in = open_source_for_copy (source, destination, flags, cancellable, error);
if (in == NULL)
return FALSE;
if (flags & G_FILE_COPY_OVERWRITE)
{
out = (GOutputStream *)g_file_replace (destination,
NULL, 0,
flags & G_FILE_COPY_BACKUP,
cancellable, error);
}
else
{
out = (GOutputStream *)g_file_create (destination, 0, cancellable, error);
}
if (out == NULL)
{
g_object_unref (in);
return FALSE;
}
if (!copy_stream_with_progress (in, out, cancellable,
progress_callback, progress_callback_data,
error))
return FALSE;
copied_file:
/* Ignore errors here. Failure to copy metadata is not a hard error */
g_file_copy_attributes (source, destination,
flags, cancellable, NULL);
return TRUE;
}
/**
* g_file_copy:
* @source: input #GFile.
* @destination: destination #GFile
* @flags: set of #GFileCopyFlags
* @cancellable: optional #GCancellable object, %NULL to ignore.
* @progress_callback: function to callback with progress information
* @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 @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;
}
}
/* 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;
}
}
}
return file_copy_fallback (source, destination, flags, cancellable,
progress_callback, progress_callback_data,
error);
}
/**
* g_file_move:
* @source: #GFile pointing to the source location.
* @destination: #GFile pointing to the destination location.
* @flags: set of #GFileCopyFlags.
* @cancellable: optional #GCancellable object, %NULL to ignore.
* @progress_callback: #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 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 @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;
}
}
/* 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;
}
}
}
if (flags & G_FILE_COPY_NO_FALLBACK_FOR_MOVE)
{
g_set_error (error, G_IO_ERROR,
G_IO_ERROR_NOT_SUPPORTED,
_("Operation not supported"));
return FALSE;
}
flags |= G_FILE_COPY_ALL_METADATA;
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_make_directory
* @file: input #GFile.
* @cancellable: optional #GCancellable object, %NULL to ignore.
* @error: a #GError, or %NULL
*
* Creates a directory.
*
* 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 (error, G_IO_ERROR,
G_IO_ERROR_NOT_SUPPORTED,
_("Operation not supported"));
return FALSE;
}
return (* iface->make_directory) (file, cancellable, error);
}
/**
* g_file_make_symbolic_link:
* @file: input #GFile.
* @symlink_value: a string with the value of the new symlink.
* @cancellable: optional #GCancellable object, %NULL to ignore.
* @error: a #GError.
*
* Creates a symbolic link.
*
* 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 (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 (error, G_IO_ERROR,
G_IO_ERROR_NOT_SUPPORTED,
_("Operation not supported"));
return FALSE;
}
return (* iface->make_symbolic_link) (file, symlink_value, cancellable, error);
}
/**
* g_file_delete:
* @file: input #GFile.
* @cancellable: optional #GCancellable object, %NULL to ignore.
* @error: a #GError, or %NULL
*
* Deletes a 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: %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 (error, G_IO_ERROR,
G_IO_ERROR_NOT_SUPPORTED,
_("Operation not supported"));
return FALSE;
}
return (* iface->delete_file) (file, cancellable, error);
}
/**
* g_file_trash:
* @file: #GFile to send to trash.
* @cancellable: 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.
*
*
* 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 (error,
G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
_("Trash not supported"));
return FALSE;
}
return (* iface->trash) (file, cancellable, error);
}
/**
* g_file_set_display_name:
* @file: input #GFile.
* @display_name: a string.
* @cancellable: optional #GCancellable object, %NULL to ignore.
* @error: a #GError, or %NULL
*
* Renames @file to the specified display name.
*
* The display name is converted from UTF8 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: a #GFile specifying what @file was renamed to, or %NULL if there was an error.
**/
GFile *
g_file_set_display_name (GFile *file,
const char *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 <link linkend="io-priority">I/O priority</link>
* of the request.
* @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
*
* Asynchronously sets the display name for a given #GFile.
*
* For more details, see g_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 char *display_name,
int 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: a #GFile or %NULL on error.
**/
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_IS_SIMPLE_ASYNC_RESULT (res))
{
GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (res);
if (g_simple_async_result_propagate_error (simple, 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: 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: 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: 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: 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)
{
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_set_attribute:
* @file: input #GFile.
* @attribute: a string containing the attribute's name.
* @type: The type of the attribute
* @value_p: a pointer to the value (or the pointer itself if the type is a pointer type)
* @flags: a set of #GFileQueryInfoFlags.
* @cancellable: optional #GCancellable object, %NULL to ignore.
* @error: a #GError, or %NULL
*
* Sets an attribute in the file with attribute name @attribute to @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 if the attribute was set, %FALSE otherwise.
**/
gboolean
g_file_set_attribute (GFile *file,
const char *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 (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: 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: %TRUE if there was any error, %FALSE 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 <link linkend="io-priority">I/O priority</link>
* of the request.
* @cancellable: optional #GCancellable object, %NULL to ignore.
* @callback: a #GAsyncReadyCallback.
* @user_data: a #gpointer.
*
* 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: 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: 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: 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 char *attribute,
const char *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: 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 char *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: 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 char *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: 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 char *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: 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 char *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.
* @mount_operation: a #GMountOperation, or %NULL to avoid user interaction.
* @cancellable: optional #GCancellable object, %NULL to ignore.
* @callback: a #GAsyncReadyCallback to call when the request is satisfied, or %NULL.
* @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,
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_simple_async_report_error_in_idle (G_OBJECT (file),
callback,
user_data,
G_IO_ERROR,
G_IO_ERROR_NOT_SUPPORTED,
_("Operation not supported"));
(* iface->mount_mountable) (file,
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: a #GFile or %NULL on error.
**/
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_IS_SIMPLE_ASYNC_RESULT (result))
{
GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (result);
if (g_simple_async_result_propagate_error (simple, error))
return NULL;
}
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: optional #GCancellable object, %NULL to ignore.
* @callback: a #GAsyncReadyCallback to call when the request is satisfied, or %NULL.
* @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.
**/
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_simple_async_report_error_in_idle (G_OBJECT (file),
callback,
user_data,
G_IO_ERROR,
G_IO_ERROR_NOT_SUPPORTED,
_("Operation not supported"));
(* 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.
**/
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_IS_SIMPLE_ASYNC_RESULT (result))
{
GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (result);
if (g_simple_async_result_propagate_error (simple, error))
return FALSE;
}
iface = G_FILE_GET_IFACE (file);
return (* iface->unmount_mountable_finish) (file, result, error);
}
/**
* g_file_eject_mountable:
* @file: input #GFile.
* @flags: flags affecting the operation
* @cancellable: optional #GCancellable object, %NULL to ignore.
* @callback: a #GAsyncReadyCallback to call when the request is satisfied, or %NULL.
* @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.
**/
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_simple_async_report_error_in_idle (G_OBJECT (file),
callback,
user_data,
G_IO_ERROR,
G_IO_ERROR_NOT_SUPPORTED,
_("Operation not supported"));
(* 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.
**/
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_IS_SIMPLE_ASYNC_RESULT (result))
{
GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (result);
if (g_simple_async_result_propagate_error (simple, error))
return FALSE;
}
iface = G_FILE_GET_IFACE (file);
return (* iface->eject_mountable_finish) (file, result, error);
}
/**
* g_file_monitor_directory:
* @file: input #GFile.
* @flags: a set of #GFileMonitorFlags.
* @cancellable: 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.
*
* Returns: a #GFileMonitor for the given @file,
* or %NULL on error.
**/
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);
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 (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: 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.
*
* Returns: a #GFileMonitor for the given @file.
**/
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;
}
/********************************************
* Default implementation of async ops *
********************************************/
typedef struct {
char *attributes;
GFileQueryInfoFlags flags;
GFileInfo *info;
} QueryInfoAsyncData;
static void
query_info_data_free (QueryInfoAsyncData *data)
{
if (data->info)
g_object_unref (data->info);
g_free (data->attributes);
g_free (data);
}
static void
query_info_async_thread (GSimpleAsyncResult *res,
GObject *object,
GCancellable *cancellable)
{
GError *error = NULL;
QueryInfoAsyncData *data;
GFileInfo *info;
data = g_simple_async_result_get_op_res_gpointer (res);
info = g_file_query_info (G_FILE (object), data->attributes, data->flags, cancellable, &error);
if (info == NULL)
{
g_simple_async_result_set_from_error (res, error);
g_error_free (error);
}
else
data->info = info;
}
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)
{
GSimpleAsyncResult *res;
QueryInfoAsyncData *data;
data = g_new0 (QueryInfoAsyncData, 1);
data->attributes = g_strdup (attributes);
data->flags = flags;
res = g_simple_async_result_new (G_OBJECT (file), callback, user_data, g_file_real_query_info_async);
g_simple_async_result_set_op_res_gpointer (res, data, (GDestroyNotify)query_info_data_free);
g_simple_async_result_run_in_thread (res, query_info_async_thread, io_priority, cancellable);
g_object_unref (res);
}
static GFileInfo *
g_file_real_query_info_finish (GFile *file,
GAsyncResult *res,
GError **error)
{
GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (res);
QueryInfoAsyncData *data;
g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_file_real_query_info_async);
data = g_simple_async_result_get_op_res_gpointer (simple);
if (data->info)
return g_object_ref (data->info);
return NULL;
}
typedef struct {
char *attributes;
GFileQueryInfoFlags flags;
GFileEnumerator *enumerator;
} EnumerateChildrenAsyncData;
static void
enumerate_children_data_free (EnumerateChildrenAsyncData *data)
{
if (data->enumerator)
g_object_unref (data->enumerator);
g_free (data->attributes);
g_free (data);
}
static void
enumerate_children_async_thread (GSimpleAsyncResult *res,
GObject *object,
GCancellable *cancellable)
{
GError *error = NULL;
EnumerateChildrenAsyncData *data;
GFileEnumerator *enumerator;
data = g_simple_async_result_get_op_res_gpointer (res);
enumerator = g_file_enumerate_children (G_FILE (object), data->attributes, data->flags, cancellable, &error);
if (enumerator == NULL)
{
g_simple_async_result_set_from_error (res, error);
g_error_free (error);
}
else
data->enumerator = enumerator;
}
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)
{
GSimpleAsyncResult *res;
EnumerateChildrenAsyncData *data;
data = g_new0 (EnumerateChildrenAsyncData, 1);
data->attributes = g_strdup (attributes);
data->flags = flags;
res = g_simple_async_result_new (G_OBJECT (file), callback, user_data, g_file_real_enumerate_children_async);
g_simple_async_result_set_op_res_gpointer (res, data, (GDestroyNotify)enumerate_children_data_free);
g_simple_async_result_run_in_thread (res, enumerate_children_async_thread, io_priority, cancellable);
g_object_unref (res);
}
static GFileEnumerator *
g_file_real_enumerate_children_finish (GFile *file,
GAsyncResult *res,
GError **error)
{
GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (res);
EnumerateChildrenAsyncData *data;
g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_file_real_enumerate_children_async);
data = g_simple_async_result_get_op_res_gpointer (simple);
if (data->enumerator)
return g_object_ref (data->enumerator);
return NULL;
}
static void
open_read_async_thread (GSimpleAsyncResult *res,
GObject *object,
GCancellable *cancellable)
{
GFileIface *iface;
GFileInputStream *stream;
GError *error = NULL;
iface = G_FILE_GET_IFACE (object);
stream = iface->read_fn (G_FILE (object), cancellable, &error);
if (stream == NULL)
{
g_simple_async_result_set_from_error (res, error);
g_error_free (error);
}
else
g_simple_async_result_set_op_res_gpointer (res, stream, g_object_unref);
}
static void
g_file_real_read_async (GFile *file,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GSimpleAsyncResult *res;
res = g_simple_async_result_new (G_OBJECT (file), callback, user_data, g_file_real_read_async);
g_simple_async_result_run_in_thread (res, open_read_async_thread, io_priority, cancellable);
g_object_unref (res);
}
static GFileInputStream *
g_file_real_read_finish (GFile *file,
GAsyncResult *res,
GError **error)
{
GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (res);
gpointer op;
g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_file_real_read_async);
op = g_simple_async_result_get_op_res_gpointer (simple);
if (op)
return g_object_ref (op);
return NULL;
}
static void
append_to_async_thread (GSimpleAsyncResult *res,
GObject *object,
GCancellable *cancellable)
{
GFileIface *iface;
GFileCreateFlags *data;
GFileOutputStream *stream;
GError *error = NULL;
iface = G_FILE_GET_IFACE (object);
data = g_simple_async_result_get_op_res_gpointer (res);
stream = iface->append_to (G_FILE (object), *data, cancellable, &error);
if (stream == NULL)
{
g_simple_async_result_set_from_error (res, error);
g_error_free (error);
}
else
g_simple_async_result_set_op_res_gpointer (res, stream, g_object_unref);
}
static void
g_file_real_append_to_async (GFile *file,
GFileCreateFlags flags,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GFileCreateFlags *data;
GSimpleAsyncResult *res;
data = g_new0 (GFileCreateFlags, 1);
*data = flags;
res = g_simple_async_result_new (G_OBJECT (file), callback, user_data, g_file_real_append_to_async);
g_simple_async_result_set_op_res_gpointer (res, data, (GDestroyNotify)g_free);
g_simple_async_result_run_in_thread (res, append_to_async_thread, io_priority, cancellable);
g_object_unref (res);
}
static GFileOutputStream *
g_file_real_append_to_finish (GFile *file,
GAsyncResult *res,
GError **error)
{
GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (res);
gpointer op;
g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_file_real_append_to_async);
op = g_simple_async_result_get_op_res_gpointer (simple);
if (op)
return g_object_ref (op);
return NULL;
}
static void
create_async_thread (GSimpleAsyncResult *res,
GObject *object,
GCancellable *cancellable)
{
GFileIface *iface;
GFileCreateFlags *data;
GFileOutputStream *stream;
GError *error = NULL;
iface = G_FILE_GET_IFACE (object);
data = g_simple_async_result_get_op_res_gpointer (res);
stream = iface->create (G_FILE (object), *data, cancellable, &error);
if (stream == NULL)
{
g_simple_async_result_set_from_error (res, error);
g_error_free (error);
}
else
g_simple_async_result_set_op_res_gpointer (res, stream, g_object_unref);
}
static void
g_file_real_create_async (GFile *file,
GFileCreateFlags flags,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GFileCreateFlags *data;
GSimpleAsyncResult *res;
data = g_new0 (GFileCreateFlags, 1);
*data = flags;
res = g_simple_async_result_new (G_OBJECT (file), callback, user_data, g_file_real_create_async);
g_simple_async_result_set_op_res_gpointer (res, data, (GDestroyNotify)g_free);
g_simple_async_result_run_in_thread (res, create_async_thread, io_priority, cancellable);
g_object_unref (res);
}
static GFileOutputStream *
g_file_real_create_finish (GFile *file,
GAsyncResult *res,
GError **error)
{
GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (res);
gpointer op;
g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_file_real_create_async);
op = g_simple_async_result_get_op_res_gpointer (simple);
if (op)
return g_object_ref (op);
return NULL;
}
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 (GSimpleAsyncResult *res,
GObject *object,
GCancellable *cancellable)
{
GFileIface *iface;
GFileOutputStream *stream;
GError *error = NULL;
ReplaceAsyncData *data;
iface = G_FILE_GET_IFACE (object);
data = g_simple_async_result_get_op_res_gpointer (res);
stream = iface->replace (G_FILE (object),
data->etag,
data->make_backup,
data->flags,
cancellable,
&error);
if (stream == NULL)
{
g_simple_async_result_set_from_error (res, error);
g_error_free (error);
}
else
data->stream = stream;
}
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)
{
GSimpleAsyncResult *res;
ReplaceAsyncData *data;
data = g_new0 (ReplaceAsyncData, 1);
data->etag = g_strdup (etag);
data->make_backup = make_backup;
data->flags = flags;
res = g_simple_async_result_new (G_OBJECT (file), callback, user_data, g_file_real_replace_async);
g_simple_async_result_set_op_res_gpointer (res, data, (GDestroyNotify)replace_async_data_free);
g_simple_async_result_run_in_thread (res, replace_async_thread, io_priority, cancellable);
g_object_unref (res);
}
static GFileOutputStream *
g_file_real_replace_finish (GFile *file,
GAsyncResult *res,
GError **error)
{
GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (res);
ReplaceAsyncData *data;
g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_file_real_replace_async);
data = g_simple_async_result_get_op_res_gpointer (simple);
if (data->stream)
return g_object_ref (data->stream);
return NULL;
}
typedef struct {
char *name;
GFile *file;
} SetDisplayNameAsyncData;
static void
set_display_name_data_free (SetDisplayNameAsyncData *data)
{
g_free (data->name);
if (data->file)
g_object_unref (data->file);
g_free (data);
}
static void
set_display_name_async_thread (GSimpleAsyncResult *res,
GObject *object,
GCancellable *cancellable)
{
GError *error = NULL;
SetDisplayNameAsyncData *data;
GFile *file;
data = g_simple_async_result_get_op_res_gpointer (res);
file = g_file_set_display_name (G_FILE (object), data->name, cancellable, &error);
if (file == NULL)
{
g_simple_async_result_set_from_error (res, error);
g_error_free (error);
}
else
data->file = file;
}
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)
{
GSimpleAsyncResult *res;
SetDisplayNameAsyncData *data;
data = g_new0 (SetDisplayNameAsyncData, 1);
data->name = g_strdup (display_name);
res = g_simple_async_result_new (G_OBJECT (file), callback, user_data, g_file_real_set_display_name_async);
g_simple_async_result_set_op_res_gpointer (res, data, (GDestroyNotify)set_display_name_data_free);
g_simple_async_result_run_in_thread (res, set_display_name_async_thread, io_priority, cancellable);
g_object_unref (res);
}
static GFile *
g_file_real_set_display_name_finish (GFile *file,
GAsyncResult *res,
GError **error)
{
GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (res);
SetDisplayNameAsyncData *data;
g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_file_real_set_display_name_async);
data = g_simple_async_result_get_op_res_gpointer (simple);
if (data->file)
return g_object_ref (data->file);
return NULL;
}
typedef struct {
GFileQueryInfoFlags flags;
GFileInfo *info;
gboolean res;
GError *error;
} SetInfoAsyncData;
static void
set_info_data_free (SetInfoAsyncData *data)
{
if (data->info)
g_object_unref (data->info);
if (data->error)
g_error_free (data->error);
g_free (data);
}
static void
set_info_async_thread (GSimpleAsyncResult *res,
GObject *object,
GCancellable *cancellable)
{
SetInfoAsyncData *data;
data = g_simple_async_result_get_op_res_gpointer (res);
data->error = NULL;
data->res = g_file_set_attributes_from_info (G_FILE (object),
data->info,
data->flags,
cancellable,
&data->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)
{
GSimpleAsyncResult *res;
SetInfoAsyncData *data;
data = g_new0 (SetInfoAsyncData, 1);
data->info = g_file_info_dup (info);
data->flags = flags;
res = g_simple_async_result_new (G_OBJECT (file), callback, user_data, g_file_real_set_attributes_async);
g_simple_async_result_set_op_res_gpointer (res, data, (GDestroyNotify)set_info_data_free);
g_simple_async_result_run_in_thread (res, set_info_async_thread, io_priority, cancellable);
g_object_unref (res);
}
static gboolean
g_file_real_set_attributes_finish (GFile *file,
GAsyncResult *res,
GFileInfo **info,
GError **error)
{
GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (res);
SetInfoAsyncData *data;
g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_file_real_set_attributes_async);
data = g_simple_async_result_get_op_res_gpointer (simple);
if (info)
*info = g_object_ref (data->info);
if (error != NULL && data->error)
*error = g_error_copy (data->error);
return data->res;
}
static void
find_enclosing_mount_async_thread (GSimpleAsyncResult *res,
GObject *object,
GCancellable *cancellable)
{
GError *error = NULL;
GMount *mount;
mount = g_file_find_enclosing_mount (G_FILE (object), cancellable, &error);
if (mount == NULL)
{
g_simple_async_result_set_from_error (res, error);
g_error_free (error);
}
else
g_simple_async_result_set_op_res_gpointer (res, mount, (GDestroyNotify)g_object_unref);
}
static void
g_file_real_find_enclosing_mount_async (GFile *file,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GSimpleAsyncResult *res;
res = g_simple_async_result_new (G_OBJECT (file), callback, user_data, g_file_real_find_enclosing_mount_async);
g_simple_async_result_run_in_thread (res, find_enclosing_mount_async_thread, io_priority, cancellable);
g_object_unref (res);
}
static GMount *
g_file_real_find_enclosing_mount_finish (GFile *file,
GAsyncResult *res,
GError **error)
{
GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (res);
GMount *mount;
g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_file_real_find_enclosing_mount_async);
mount = g_simple_async_result_get_op_res_gpointer (simple);
return g_object_ref (mount);
}
/********************************************
* Default VFS operations *
********************************************/
/**
* g_file_new_for_path:
* @path: a string containing a relative or absolute path.
*
* 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: a new #GFile for the given @path.
**/
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 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: a #GFile for the given @uri.
**/
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_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: 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);
}
static gboolean
is_valid_scheme_character (char c)
{
return g_ascii_isalnum (c) || c == '+' || c == '-' || c == '.';
}
static gboolean
has_valid_scheme (const char *uri)
{
const char *p;
p = uri;
if (!is_valid_scheme_character (*p))
return FALSE;
do {
p++;
} while (is_valid_scheme_character (*p));
return *p == ':';
}
/**
* g_file_new_for_commandline_arg:
* @arg: 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.
*
* Returns: a new #GFile.
**/
GFile *
g_file_new_for_commandline_arg (const char *arg)
{
GFile *file;
char *filename;
char *current_dir;
g_return_val_if_fail (arg != NULL, NULL);
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);
current_dir = g_get_current_dir ();
filename = g_build_filename (current_dir, arg, NULL);
g_free (current_dir);
file = g_file_new_for_path (filename);
g_free (filename);
return file;
}
/**
* g_file_mount_enclosing_volume:
* @location: input #GFile.
* @mount_operation: a #GMountOperation or %NULL to avoid user interaction.
* @cancellable: optional #GCancellable object, %NULL to ignore.
* @callback: 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,
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_simple_async_report_error_in_idle (G_OBJECT (location),
callback, user_data,
G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
_("volume doesn't implement mount"));
return;
}
(* iface->mount_enclosing_volume) (location, 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_IS_SIMPLE_ASYNC_RESULT (result))
{
GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (result);
if (g_simple_async_result_propagate_error (simple, error))
return FALSE;
}
iface = G_FILE_GET_IFACE (location);
return (* iface->mount_enclosing_volume_finish) (location, result, error);
}
/********************************************
* Utility functions *
********************************************/
#define GET_CONTENT_BLOCK_SIZE 8192
/**
* g_file_load_contents:
* @file: input #GFile.
* @cancellable: optional #GCancellable object, %NULL to ignore.
* @contents: a location to place the contents of the file.
* @length: a location to place the length of the contents of the file.
* @etag_out: a location to place the current entity tag for the file.
* @error: a #GError, or %NULL
*
* Loads the content of the file into memory, returning the size of
* the data. The data is always zero terminated, but this is not
* included in the resultant @length.
*
* 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;
GByteArray *content;
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;
content = g_byte_array_new ();
pos = 0;
g_byte_array_set_size (content, pos + GET_CONTENT_BLOCK_SIZE + 1);
while ((res = g_input_stream_read (G_INPUT_STREAM (in),
content->data + pos,
GET_CONTENT_BLOCK_SIZE,
cancellable, error)) > 0)
{
pos += res;
g_byte_array_set_size (content, pos + GET_CONTENT_BLOCK_SIZE + 1);
}
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_strdup (g_file_info_get_etag (info));
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_byte_array_free (content, TRUE);
return FALSE;
}
if (length)
*length = pos;
/* Zero terminate (we got an extra byte allocated for this */
content->data[pos] = 0;
*contents = (char *)g_byte_array_free (content, FALSE);
return TRUE;
}
typedef struct {
GFile *file;
GError *error;
GCancellable *cancellable;
GFileReadMoreCallback read_more_callback;
GAsyncReadyCallback callback;
gpointer user_data;
GByteArray *content;
gsize pos;
char *etag;
} LoadContentsData;
static void
load_contents_data_free (LoadContentsData *data)
{
if (data->error)
g_error_free (data->error);
if (data->cancellable)
g_object_unref (data->cancellable);
if (data->content)
g_byte_array_free (data->content, TRUE);
g_free (data->etag);
g_object_unref (data->file);
g_free (data);
}
static void
load_contents_close_callback (GObject *obj,
GAsyncResult *close_res,
gpointer user_data)
{
GInputStream *stream = G_INPUT_STREAM (obj);
LoadContentsData *data = user_data;
GSimpleAsyncResult *res;
/* Ignore errors here, we're only reading anyway */
g_input_stream_close_finish (stream, close_res, NULL);
g_object_unref (stream);
res = g_simple_async_result_new (G_OBJECT (data->file),
data->callback,
data->user_data,
g_file_load_contents_async);
g_simple_async_result_set_op_res_gpointer (res, data, (GDestroyNotify)load_contents_data_free);
g_simple_async_result_complete (res);
g_object_unref (res);
}
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_strdup (g_file_info_get_etag (info));
g_object_unref (info);
}
g_input_stream_close_async (stream, 0,
data->cancellable,
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)
{
/* Error or EOF, close the file */
data->error = error;
g_input_stream_close_async (stream, 0,
data->cancellable,
load_contents_close_callback, data);
}
else if (read_size == 0)
{
g_file_input_stream_query_info_async (G_FILE_INPUT_STREAM (stream),
G_FILE_ATTRIBUTE_ETAG_VALUE,
0,
data->cancellable,
load_contents_fstat_callback,
data);
}
else if (read_size > 0)
{
data->pos += read_size;
g_byte_array_set_size (data->content,
data->pos + GET_CONTENT_BLOCK_SIZE);
if (data->read_more_callback &&
!data->read_more_callback ((char *)data->content->data, data->pos, data->user_data))
g_file_input_stream_query_info_async (G_FILE_INPUT_STREAM (stream),
G_FILE_ATTRIBUTE_ETAG_VALUE,
0,
data->cancellable,
load_contents_fstat_callback,
data);
else
g_input_stream_read_async (stream,
data->content->data + data->pos,
GET_CONTENT_BLOCK_SIZE,
0,
data->cancellable,
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;
GSimpleAsyncResult *res;
stream = g_file_read_finish (file, open_res, &error);
if (stream)
{
g_byte_array_set_size (data->content,
data->pos + GET_CONTENT_BLOCK_SIZE);
g_input_stream_read_async (G_INPUT_STREAM (stream),
data->content->data + data->pos,
GET_CONTENT_BLOCK_SIZE,
0,
data->cancellable,
load_contents_read_callback,
data);
}
else
{
res = g_simple_async_result_new_from_error (G_OBJECT (data->file),
data->callback,
data->user_data,
error);
g_simple_async_result_complete (res);
g_error_free (error);
load_contents_data_free (data);
g_object_unref (res);
}
}
/**
* g_file_load_partial_contents_async:
* @file: input #GFile.
* @cancellable: optional #GCancellable object, %NULL to ignore.
* @read_more_callback: a #GFileReadMoreCallback to receive partial data and to specify whether further data should be read.
* @callback: 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);
if (cancellable)
data->cancellable = g_object_ref (cancellable);
data->read_more_callback = read_more_callback;
data->callback = callback;
data->user_data = user_data;
data->content = g_byte_array_new ();
data->file = g_object_ref (file);
g_file_read_async (file,
0,
cancellable,
load_contents_open_callback,
data);
}
/**
* g_file_load_partial_contents_finish:
* @file: input #GFile.
* @res: a #GAsyncResult.
* @contents: a location to place the contents of the file.
* @length: a location to place the length of the contents of the file.
* @etag_out: a location to place the current entity tag for the file.
* @error: a #GError, or %NULL
*
* Finishes an asynchronous partial load operation that was started
* with g_file_load_partial_contents_async().
*
* 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)
{
GSimpleAsyncResult *simple;
LoadContentsData *data;
g_return_val_if_fail (G_IS_FILE (file), FALSE);
g_return_val_if_fail (G_IS_SIMPLE_ASYNC_RESULT (res), FALSE);
g_return_val_if_fail (contents != NULL, FALSE);
simple = G_SIMPLE_ASYNC_RESULT (res);
if (g_simple_async_result_propagate_error (simple, error))
return FALSE;
g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_file_load_contents_async);
data = g_simple_async_result_get_op_res_gpointer (simple);
if (data->error)
{
g_propagate_error (error, data->error);
data->error = NULL;
*contents = NULL;
if (length)
*length = 0;
return FALSE;
}
if (length)
*length = data->pos;
if (etag_out)
{
*etag_out = data->etag;
data->etag = NULL;
}
/* Zero terminate */
g_byte_array_set_size (data->content, data->pos + 1);
data->content->data[data->pos] = 0;
*contents = (char *)g_byte_array_free (data->content, FALSE);
data->content = NULL;
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: a location to place the contents of the file.
* @length: a location to place the length of the contents of the file.
* @etag_out: a location to place the current entity tag for the file.
* @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. 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: a string containing the new contents for @file.
* @length: the length of @contents in bytes.
* @etag: the old <link linkend="gfile-etag">entity tag</link>
* for the document.
* @make_backup: %TRUE if a backup should be created.
* @flags: a set of #GFileCreateFlags.
* @new_etag: a location to a new <link linkend="gfile-etag">entity tag</link>
* for the document.
* @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.
*
* 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;
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);
/* error is set already */
return FALSE;
}
if (!g_output_stream_close (G_OUTPUT_STREAM (out), cancellable, error))
return FALSE;
if (new_etag)
*new_etag = g_file_output_stream_get_etag (out);
return TRUE;
}
typedef struct {
GFile *file;
GError *error;
GCancellable *cancellable;
GAsyncReadyCallback callback;
gpointer user_data;
const char *content;
gsize length;
gsize pos;
char *etag;
} ReplaceContentsData;
static void
replace_contents_data_free (ReplaceContentsData *data)
{
if (data->error)
g_error_free (data->error);
if (data->cancellable)
g_object_unref (data->cancellable);
g_object_unref (data->file);
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;
GSimpleAsyncResult *res;
/* Ignore errors here, we're only reading anyway */
g_output_stream_close_finish (stream, close_res, NULL);
g_object_unref (stream);
data->etag = g_file_output_stream_get_etag (G_FILE_OUTPUT_STREAM (stream));
res = g_simple_async_result_new (G_OBJECT (data->file),
data->callback,
data->user_data,
g_file_replace_contents_async);
g_simple_async_result_set_op_res_gpointer (res, data, (GDestroyNotify)replace_contents_data_free);
g_simple_async_result_complete (res);
g_object_unref (res);
}
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->error = error;
g_output_stream_close_async (stream, 0,
data->cancellable,
replace_contents_close_callback, data);
}
else if (write_size > 0)
{
data->pos += write_size;
if (data->pos >= data->length)
g_output_stream_close_async (stream, 0,
data->cancellable,
replace_contents_close_callback, data);
else
g_output_stream_write_async (stream,
data->content + data->pos,
data->length - data->pos,
0,
data->cancellable,
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;
GSimpleAsyncResult *res;
stream = g_file_replace_finish (file, open_res, &error);
if (stream)
{
g_output_stream_write_async (G_OUTPUT_STREAM (stream),
data->content + data->pos,
data->length - data->pos,
0,
data->cancellable,
replace_contents_write_callback,
data);
}
else
{
res = g_simple_async_result_new_from_error (G_OBJECT (data->file),
data->callback,
data->user_data,
error);
g_simple_async_result_complete (res);
g_error_free (error);
replace_contents_data_free (data);
g_object_unref (res);
}
}
/**
* g_file_replace_contents_async:
* @file: input #GFile.
* @contents: string of contents to replace the file with.
* @length: the length of @contents in bytes.
* @etag: a new <link linkend="gfile-etag">entity tag</link> for the @file.
* @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.
**/
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)
{
ReplaceContentsData *data;
g_return_if_fail (G_IS_FILE (file));
g_return_if_fail (contents != NULL);
data = g_new0 (ReplaceContentsData, 1);
if (cancellable)
data->cancellable = g_object_ref (cancellable);
data->callback = callback;
data->user_data = user_data;
data->content = contents;
data->length = length;
data->pos = 0;
data->file = g_object_ref (file);
g_file_replace_async (file,
etag,
make_backup,
flags,
0,
cancellable,
replace_contents_open_callback,
data);
}
/**
* g_file_replace_contents_finish:
* @file: input #GFile.
* @res: a #GAsyncResult.
* @new_etag: a location of a new <link linkend="gfile-etag">entity tag</link>
* for the document.
* @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)
{
GSimpleAsyncResult *simple;
ReplaceContentsData *data;
g_return_val_if_fail (G_IS_FILE (file), FALSE);
g_return_val_if_fail (G_IS_SIMPLE_ASYNC_RESULT (res), FALSE);
simple = G_SIMPLE_ASYNC_RESULT (res);
if (g_simple_async_result_propagate_error (simple, error))
return FALSE;
g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_file_replace_contents_async);
data = g_simple_async_result_get_op_res_gpointer (simple);
if (data->error)
{
g_propagate_error (error, data->error);
data->error = NULL;
return FALSE;
}
if (new_etag)
{
*new_etag = data->etag;
data->etag = NULL; /* Take ownership */
}
return TRUE;
}
#define __G_FILE_C__
#include "gioaliasdef.c"
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