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glib/gio/gunixmounts.c
Christian Hergert 18a33f72db introspection: use (nullable) or (optional) instead of (allow-none) 
If we have an input parameter (or return value) we need to use (nullable).
However, if it is an (inout) or (out) parameter, (optional) is sufficient.

It looks like (nullable) could be used for everything according to the
Annotation documentation, but (optional) is more specific.
2016-11-22 14:14:37 -08:00

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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/* GIO - GLib Input, Output and Streaming Library
*
* Copyright (C) 2006-2007 Red Hat, Inc.
*
* 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, see <http://www.gnu.org/licenses/>.
*
* Author: Alexander Larsson <alexl@redhat.com>
*/
/* Prologue {{{1 */
#include "config.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#ifndef HAVE_SYSCTLBYNAME
#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#endif
#ifdef HAVE_POLL
#include <poll.h>
#endif
#include <stdio.h>
#include <unistd.h>
#include <sys/time.h>
#include <errno.h>
#include <string.h>
#include <signal.h>
#include <gstdio.h>
#include <dirent.h>
#if HAVE_SYS_STATFS_H
#include <sys/statfs.h>
#endif
#if HAVE_SYS_STATVFS_H
#include <sys/statvfs.h>
#endif
#if HAVE_SYS_VFS_H
#include <sys/vfs.h>
#elif HAVE_SYS_MOUNT_H
#if HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#include <sys/mount.h>
#endif
#ifndef O_BINARY
#define O_BINARY 0
#endif
#include "gunixmounts.h"
#include "glocalfileprivate.h"
#include "gfile.h"
#include "gfilemonitor.h"
#include "glibintl.h"
#include "gthemedicon.h"
#include "gcontextspecificgroup.h"
#ifdef HAVE_MNTENT_H
static const char *_resolve_dev_root (void);
#endif
/**
* SECTION:gunixmounts
* @include: gio/gunixmounts.h
* @short_description: UNIX mounts
*
* Routines for managing mounted UNIX mount points and paths.
*
* Note that `<gio/gunixmounts.h>` belongs to the UNIX-specific GIO
* interfaces, thus you have to use the `gio-unix-2.0.pc` pkg-config
* file when using it.
*/
/**
* GUnixMountType:
* @G_UNIX_MOUNT_TYPE_UNKNOWN: Unknown UNIX mount type.
* @G_UNIX_MOUNT_TYPE_FLOPPY: Floppy disk UNIX mount type.
* @G_UNIX_MOUNT_TYPE_CDROM: CDROM UNIX mount type.
* @G_UNIX_MOUNT_TYPE_NFS: Network File System (NFS) UNIX mount type.
* @G_UNIX_MOUNT_TYPE_ZIP: ZIP UNIX mount type.
* @G_UNIX_MOUNT_TYPE_JAZ: JAZZ UNIX mount type.
* @G_UNIX_MOUNT_TYPE_MEMSTICK: Memory Stick UNIX mount type.
* @G_UNIX_MOUNT_TYPE_CF: Compact Flash UNIX mount type.
* @G_UNIX_MOUNT_TYPE_SM: Smart Media UNIX mount type.
* @G_UNIX_MOUNT_TYPE_SDMMC: SD/MMC UNIX mount type.
* @G_UNIX_MOUNT_TYPE_IPOD: iPod UNIX mount type.
* @G_UNIX_MOUNT_TYPE_CAMERA: Digital camera UNIX mount type.
* @G_UNIX_MOUNT_TYPE_HD: Hard drive UNIX mount type.
*
* Types of UNIX mounts.
**/
typedef enum {
G_UNIX_MOUNT_TYPE_UNKNOWN,
G_UNIX_MOUNT_TYPE_FLOPPY,
G_UNIX_MOUNT_TYPE_CDROM,
G_UNIX_MOUNT_TYPE_NFS,
G_UNIX_MOUNT_TYPE_ZIP,
G_UNIX_MOUNT_TYPE_JAZ,
G_UNIX_MOUNT_TYPE_MEMSTICK,
G_UNIX_MOUNT_TYPE_CF,
G_UNIX_MOUNT_TYPE_SM,
G_UNIX_MOUNT_TYPE_SDMMC,
G_UNIX_MOUNT_TYPE_IPOD,
G_UNIX_MOUNT_TYPE_CAMERA,
G_UNIX_MOUNT_TYPE_HD
} GUnixMountType;
struct _GUnixMountEntry {
char *mount_path;
char *device_path;
char *filesystem_type;
gboolean is_read_only;
gboolean is_system_internal;
};
struct _GUnixMountPoint {
char *mount_path;
char *device_path;
char *filesystem_type;
char *options;
gboolean is_read_only;
gboolean is_user_mountable;
gboolean is_loopback;
};
static GList *_g_get_unix_mounts (void);
static GList *_g_get_unix_mount_points (void);
static guint64 mount_poller_time = 0;
#ifdef HAVE_SYS_MNTTAB_H
#define MNTOPT_RO "ro"
#endif
#ifdef HAVE_MNTENT_H
#include <mntent.h>
#ifdef HAVE_LIBMOUNT
#include <libmount/libmount.h>
#endif
#elif defined (HAVE_SYS_MNTTAB_H)
#include <sys/mnttab.h>
#endif
#ifdef HAVE_SYS_VFSTAB_H
#include <sys/vfstab.h>
#endif
#if defined(HAVE_SYS_MNTCTL_H) && defined(HAVE_SYS_VMOUNT_H) && defined(HAVE_SYS_VFS_H)
#include <sys/mntctl.h>
#include <sys/vfs.h>
#include <sys/vmount.h>
#include <fshelp.h>
#endif
#if (defined(HAVE_GETVFSSTAT) || defined(HAVE_GETFSSTAT)) && defined(HAVE_FSTAB_H) && defined(HAVE_SYS_MOUNT_H)
#include <sys/param.h>
#include <sys/ucred.h>
#include <sys/mount.h>
#include <fstab.h>
#ifdef HAVE_SYS_SYSCTL_H
#include <sys/sysctl.h>
#endif
#endif
#ifndef HAVE_SETMNTENT
#define setmntent(f,m) fopen(f,m)
#endif
#ifndef HAVE_ENDMNTENT
#define endmntent(f) fclose(f)
#endif
static gboolean
is_in (const char *value, const char *set[])
{
int i;
for (i = 0; set[i] != NULL; i++)
{
if (strcmp (set[i], value) == 0)
return TRUE;
}
return FALSE;
}
/**
* g_unix_is_mount_path_system_internal:
* @mount_path: (type filename): a mount path, e.g. `/media/disk` or `/usr`
*
* Determines if @mount_path is considered an implementation of the
* OS. This is primarily used for hiding mountable and mounted volumes
* that only are used in the OS and has little to no relevance to the
* casual user.
*
* Returns: %TRUE if @mount_path is considered an implementation detail
* of the OS.
**/
gboolean
g_unix_is_mount_path_system_internal (const char *mount_path)
{
const char *ignore_mountpoints[] = {
/* Includes all FHS 2.3 toplevel dirs and other specialized
* directories that we want to hide from the user.
*/
"/", /* we already have "Filesystem root" in Nautilus */
"/bin",
"/boot",
"/compat/linux/proc",
"/compat/linux/sys",
"/dev",
"/etc",
"/home",
"/lib",
"/lib64",
"/libexec",
"/live/cow",
"/live/image",
"/media",
"/mnt",
"/opt",
"/rescue",
"/root",
"/sbin",
"/srv",
"/tmp",
"/usr",
"/usr/X11R6",
"/usr/local",
"/usr/obj",
"/usr/ports",
"/usr/src",
"/usr/xobj",
"/var",
"/var/crash",
"/var/local",
"/var/log",
"/var/log/audit", /* https://bugzilla.redhat.com/show_bug.cgi?id=333041 */
"/var/mail",
"/var/run",
"/var/tmp", /* https://bugzilla.redhat.com/show_bug.cgi?id=335241 */
"/proc",
"/sbin",
"/net",
"/sys",
NULL
};
if (is_in (mount_path, ignore_mountpoints))
return TRUE;
if (g_str_has_prefix (mount_path, "/dev/") ||
g_str_has_prefix (mount_path, "/proc/") ||
g_str_has_prefix (mount_path, "/sys/"))
return TRUE;
if (g_str_has_suffix (mount_path, "/.gvfs"))
return TRUE;
return FALSE;
}
static gboolean
guess_system_internal (const char *mountpoint,
const char *fs,
const char *device)
{
const char *ignore_fs[] = {
"auto",
"autofs",
"devfs",
"devpts",
"ecryptfs",
"fdescfs",
"kernfs",
"linprocfs",
"mfs",
"nullfs",
"proc",
"procfs",
"ptyfs",
"rootfs",
"selinuxfs",
"sysfs",
"tmpfs",
"usbfs",
"nfsd",
"rpc_pipefs",
"zfs",
NULL
};
const char *ignore_devices[] = {
"none",
"sunrpc",
"devpts",
"nfsd",
"/dev/loop",
"/dev/vn",
NULL
};
if (is_in (fs, ignore_fs))
return TRUE;
if (is_in (device, ignore_devices))
return TRUE;
if (g_unix_is_mount_path_system_internal (mountpoint))
return TRUE;
return FALSE;
}
/* GUnixMounts (ie: mtab) implementations {{{1 */
static GUnixMountEntry *
create_unix_mount_entry (const char *device_path,
const char *mount_path,
const char *filesystem_type,
gboolean is_read_only)
{
GUnixMountEntry *mount_entry = NULL;
mount_entry = g_new0 (GUnixMountEntry, 1);
mount_entry->device_path = g_strdup (device_path);
mount_entry->mount_path = g_strdup (mount_path);
mount_entry->filesystem_type = g_strdup (filesystem_type);
mount_entry->is_read_only = is_read_only;
mount_entry->is_system_internal =
guess_system_internal (mount_entry->mount_path,
mount_entry->filesystem_type,
mount_entry->device_path);
return mount_entry;
}
static GUnixMountPoint *
create_unix_mount_point (const char *device_path,
const char *mount_path,
const char *filesystem_type,
const char *options,
gboolean is_read_only,
gboolean is_user_mountable,
gboolean is_loopback)
{
GUnixMountPoint *mount_point = NULL;
mount_point = g_new0 (GUnixMountPoint, 1);
mount_point->device_path = g_strdup (device_path);
mount_point->mount_path = g_strdup (mount_path);
mount_point->filesystem_type = g_strdup (filesystem_type);
mount_point->options = g_strdup (options);
mount_point->is_read_only = is_read_only;
mount_point->is_user_mountable = is_user_mountable;
mount_point->is_loopback = is_loopback;
return mount_point;
}
/* mntent.h (Linux, GNU, NSS) {{{2 */
#ifdef HAVE_MNTENT_H
#ifdef HAVE_LIBMOUNT
/* For documentation on /proc/self/mountinfo see
* http://www.kernel.org/doc/Documentation/filesystems/proc.txt
*/
#define PROC_MOUNTINFO_PATH "/proc/self/mountinfo"
static GList *
_g_get_unix_mounts (void)
{
struct libmnt_table *table = NULL;
struct libmnt_context *ctxt = NULL;
struct libmnt_iter* iter = NULL;
struct libmnt_fs *fs = NULL;
GUnixMountEntry *mount_entry = NULL;
GList *return_list = NULL;
ctxt = mnt_new_context ();
mnt_context_get_mtab (ctxt, &table);
if (!table)
goto out;
iter = mnt_new_iter (MNT_ITER_FORWARD);
while (mnt_table_next_fs (table, iter, &fs) == 0)
{
const char *device_path = NULL;
char *mount_options = NULL;
unsigned long mount_flags = 0;
gboolean is_read_only = FALSE;
if (!mnt_table_is_fs_mounted (table, fs))
continue;
device_path = mnt_fs_get_source (fs);
if (g_strcmp0 (device_path, "/dev/root") == 0)
device_path = _resolve_dev_root ();
mount_options = mnt_fs_strdup_options (fs);
if (mount_options)
{
mnt_optstr_get_flags (mount_options, &mount_flags, mnt_get_builtin_optmap (MNT_LINUX_MAP));
g_free (mount_options);
}
is_read_only = (mount_flags & MS_RDONLY) ? TRUE : FALSE;
mount_entry = create_unix_mount_entry (device_path,
mnt_fs_get_target (fs),
mnt_fs_get_fstype (fs),
is_read_only);
return_list = g_list_prepend (return_list, mount_entry);
}
mnt_free_iter (iter);
out:
mnt_free_context (ctxt);
return g_list_reverse (return_list);
}
#else
static char *
get_mtab_read_file (void)
{
#ifdef _PATH_MOUNTED
# ifdef __linux__
return "/proc/mounts";
# else
return _PATH_MOUNTED;
# endif
#else
return "/etc/mtab";
#endif
}
#ifndef HAVE_GETMNTENT_R
G_LOCK_DEFINE_STATIC(getmntent);
#endif
static GList *
_g_get_unix_mounts (void)
{
#ifdef HAVE_GETMNTENT_R
struct mntent ent;
char buf[1024];
#endif
struct mntent *mntent;
FILE *file;
char *read_file;
GUnixMountEntry *mount_entry;
GHashTable *mounts_hash;
GList *return_list;
read_file = get_mtab_read_file ();
file = setmntent (read_file, "r");
if (file == NULL)
return NULL;
return_list = NULL;
mounts_hash = g_hash_table_new (g_str_hash, g_str_equal);
#ifdef HAVE_GETMNTENT_R
while ((mntent = getmntent_r (file, &ent, buf, sizeof (buf))) != NULL)
#else
G_LOCK (getmntent);
while ((mntent = getmntent (file)) != NULL)
#endif
{
const char *device_path = NULL;
gboolean is_read_only = FALSE;
/* ignore any mnt_fsname that is repeated and begins with a '/'
*
* We do this to avoid being fooled by --bind mounts, since
* these have the same device as the location they bind to.
* It's not an ideal solution to the problem, but it's likely that
* the most important mountpoint is first and the --bind ones after
* that aren't as important. So it should work.
*
* The '/' is to handle procfs, tmpfs and other no device mounts.
*/
if (mntent->mnt_fsname != NULL &&
mntent->mnt_fsname[0] == '/' &&
g_hash_table_lookup (mounts_hash, mntent->mnt_fsname))
continue;
if (g_strcmp0 (mntent->mnt_fsname, "/dev/root") == 0)
device_path = _resolve_dev_root ();
else
device_path = mntent->mnt_fsname;
#if defined (HAVE_HASMNTOPT)
if (hasmntopt (mntent, MNTOPT_RO) != NULL)
is_read_only = TRUE;
#endif
mount_entry = create_unix_mount_entry (device_path,
mntent->mnt_dir,
mntent->mnt_type,
is_read_only);
g_hash_table_insert (mounts_hash,
mount_entry->device_path,
mount_entry->device_path);
return_list = g_list_prepend (return_list, mount_entry);
}
g_hash_table_destroy (mounts_hash);
endmntent (file);
#ifndef HAVE_GETMNTENT_R
G_UNLOCK (getmntent);
#endif
return g_list_reverse (return_list);
}
#endif /* HAVE_LIBMOUNT */
static char *
get_mtab_monitor_file (void)
{
static char *mountinfo_path = NULL;
#ifdef HAVE_LIBMOUNT
struct stat buf;
#endif
if (mountinfo_path != NULL)
return mountinfo_path;
#ifdef HAVE_LIBMOUNT
/* If using libmount we'll have the logic in place to read mountinfo */
if (stat (PROC_MOUNTINFO_PATH, &buf) == 0)
{
mountinfo_path = PROC_MOUNTINFO_PATH;
return mountinfo_path;
}
#endif
#ifdef _PATH_MOUNTED
# ifdef __linux__
mountinfo_path = "/proc/mounts";
# else
mountinfo_path = _PATH_MOUNTED;
# endif
#else
mountinfo_path = "/etc/mtab";
#endif
return mountinfo_path;
}
/* mnttab.h {{{2 */
#elif defined (HAVE_SYS_MNTTAB_H)
G_LOCK_DEFINE_STATIC(getmntent);
static char *
get_mtab_read_file (void)
{
#ifdef _PATH_MOUNTED
return _PATH_MOUNTED;
#else
return "/etc/mnttab";
#endif
}
static char *
get_mtab_monitor_file (void)
{
return get_mtab_read_file ();
}
static GList *
_g_get_unix_mounts (void)
{
struct mnttab mntent;
FILE *file;
char *read_file;
GUnixMountEntry *mount_entry;
GList *return_list;
read_file = get_mtab_read_file ();
file = setmntent (read_file, "r");
if (file == NULL)
return NULL;
return_list = NULL;
G_LOCK (getmntent);
while (! getmntent (file, &mntent))
{
gboolean is_read_only = FALSE;
#if defined (HAVE_HASMNTOPT)
if (hasmntopt (&mntent, MNTOPT_RO) != NULL)
is_read_only = TRUE;
#endif
mount_entry = create_unix_mount_entry (mntent.mnt_special,
mntent.mnt_mountp,
mntent.mnt_fstype,
is_read_only);
return_list = g_list_prepend (return_list, mount_entry);
}
endmntent (file);
G_UNLOCK (getmntent);
return g_list_reverse (return_list);
}
/* mntctl.h (AIX) {{{2 */
#elif defined(HAVE_SYS_MNTCTL_H) && defined(HAVE_SYS_VMOUNT_H) && defined(HAVE_SYS_VFS_H)
static char *
get_mtab_monitor_file (void)
{
return NULL;
}
static GList *
_g_get_unix_mounts (void)
{
struct vfs_ent *fs_info;
struct vmount *vmount_info;
int vmount_number;
unsigned int vmount_size;
int current;
GList *return_list;
if (mntctl (MCTL_QUERY, sizeof (vmount_size), &vmount_size) != 0)
{
g_warning ("Unable to know the number of mounted volumes\n");
return NULL;
}
vmount_info = (struct vmount*)g_malloc (vmount_size);
vmount_number = mntctl (MCTL_QUERY, vmount_size, vmount_info);
if (vmount_info->vmt_revision != VMT_REVISION)
g_warning ("Bad vmount structure revision number, want %d, got %d\n", VMT_REVISION, vmount_info->vmt_revision);
if (vmount_number < 0)
{
g_warning ("Unable to recover mounted volumes information\n");
g_free (vmount_info);
return NULL;
}
return_list = NULL;
while (vmount_number > 0)
{
gboolean is_read_only = FALSE;
fs_info = getvfsbytype (vmount_info->vmt_gfstype);
/* is_removable = (vmount_info->vmt_flags & MNT_REMOVABLE) ? 1 : 0; */
is_read_only = (vmount_info->vmt_flags & MNT_READONLY) ? 1 : 0;
mount_entry = create_unix_mount_entry (vmt2dataptr (vmount_info, VMT_OBJECT),
vmt2dataptr (vmount_info, VMT_STUB),
fs_info == NULL ? "unknown" : fs_info->vfsent_name,
is_read_only);
return_list = g_list_prepend (return_list, mount_entry);
vmount_info = (struct vmount *)( (char*)vmount_info
+ vmount_info->vmt_length);
vmount_number--;
}
g_free (vmount_info);
return g_list_reverse (return_list);
}
/* sys/mount.h {{{2 */
#elif (defined(HAVE_GETVFSSTAT) || defined(HAVE_GETFSSTAT)) && defined(HAVE_FSTAB_H) && defined(HAVE_SYS_MOUNT_H)
static char *
get_mtab_monitor_file (void)
{
return NULL;
}
static GList *
_g_get_unix_mounts (void)
{
#if defined(USE_STATVFS)
struct statvfs *mntent = NULL;
#elif defined(USE_STATFS)
struct statfs *mntent = NULL;
#else
#error statfs juggling failed
#endif
size_t bufsize;
int num_mounts, i;
GUnixMountEntry *mount_entry;
GList *return_list;
/* Pass NOWAIT to avoid blocking trying to update NFS mounts. */
#if defined(USE_STATVFS) && defined(HAVE_GETVFSSTAT)
num_mounts = getvfsstat (NULL, 0, ST_NOWAIT);
#elif defined(USE_STATFS) && defined(HAVE_GETFSSTAT)
num_mounts = getfsstat (NULL, 0, MNT_NOWAIT);
#endif
if (num_mounts == -1)
return NULL;
bufsize = num_mounts * sizeof (*mntent);
mntent = g_malloc (bufsize);
#if defined(USE_STATVFS) && defined(HAVE_GETVFSSTAT)
num_mounts = getvfsstat (mntent, bufsize, ST_NOWAIT);
#elif defined(USE_STATFS) && defined(HAVE_GETFSSTAT)
num_mounts = getfsstat (mntent, bufsize, MNT_NOWAIT);
#endif
if (num_mounts == -1)
return NULL;
return_list = NULL;
for (i = 0; i < num_mounts; i++)
{
gboolean is_read_only = FALSE;
#if defined(USE_STATVFS)
if (mntent[i].f_flag & ST_RDONLY)
#elif defined(USE_STATFS)
if (mntent[i].f_flags & MNT_RDONLY)
#else
#error statfs juggling failed
#endif
is_read_only = TRUE;
mount_entry = create_unix_mount_entry (mntent[i].f_mntfromname,
mntent[i].f_mntonname,
mntent[i].f_fstypename,
is_read_only);
return_list = g_list_prepend (return_list, mount_entry);
}
g_free (mntent);
return g_list_reverse (return_list);
}
/* Interix {{{2 */
#elif defined(__INTERIX)
static char *
get_mtab_monitor_file (void)
{
return NULL;
}
static GList *
_g_get_unix_mounts (void)
{
DIR *dirp;
GList* return_list = NULL;
char filename[9 + NAME_MAX];
dirp = opendir ("/dev/fs");
if (!dirp)
{
g_warning ("unable to read /dev/fs!");
return NULL;
}
while (1)
{
struct statvfs statbuf;
struct dirent entry;
struct dirent* result;
if (readdir_r (dirp, &entry, &result) || result == NULL)
break;
strcpy (filename, "/dev/fs/");
strcat (filename, entry.d_name);
if (statvfs (filename, &statbuf) == 0)
{
GUnixMountEntry* mount_entry = g_new0(GUnixMountEntry, 1);
mount_entry->mount_path = g_strdup (statbuf.f_mntonname);
mount_entry->device_path = g_strdup (statbuf.f_mntfromname);
mount_entry->filesystem_type = g_strdup (statbuf.f_fstypename);
if (statbuf.f_flag & ST_RDONLY)
mount_entry->is_read_only = TRUE;
return_list = g_list_prepend(return_list, mount_entry);
}
}
return_list = g_list_reverse (return_list);
closedir (dirp);
return return_list;
}
/* Common code {{{2 */
#else
#error No _g_get_unix_mounts() implementation for system
#endif
/* GUnixMountPoints (ie: fstab) implementations {{{1 */
/* _g_get_unix_mount_points():
* read the fstab.
* don't return swap and ignore mounts.
*/
static char *
get_fstab_file (void)
{
#ifdef HAVE_LIBMOUNT
return (char *) mnt_get_fstab_path ();
#else
#if defined(HAVE_SYS_MNTCTL_H) && defined(HAVE_SYS_VMOUNT_H) && defined(HAVE_SYS_VFS_H)
/* AIX */
return "/etc/filesystems";
#elif defined(_PATH_MNTTAB)
return _PATH_MNTTAB;
#elif defined(VFSTAB)
return VFSTAB;
#else
return "/etc/fstab";
#endif
#endif
}
/* mntent.h (Linux, GNU, NSS) {{{2 */
#ifdef HAVE_MNTENT_H
#ifdef HAVE_LIBMOUNT
static GList *
_g_get_unix_mount_points (void)
{
struct libmnt_table *table = NULL;
struct libmnt_context *ctxt = NULL;
struct libmnt_iter* iter = NULL;
struct libmnt_fs *fs = NULL;
GUnixMountPoint *mount_point = NULL;
GList *return_list = NULL;
ctxt = mnt_new_context ();
mnt_context_get_fstab (ctxt, &table);
if (!table)
goto out;
iter = mnt_new_iter (MNT_ITER_FORWARD);
while (mnt_table_next_fs (table, iter, &fs) == 0)
{
const char *device_path = NULL;
const char *mount_path = NULL;
const char *mount_fstype = NULL;
char *mount_options = NULL;
gboolean is_read_only = FALSE;
gboolean is_user_mountable = FALSE;
gboolean is_loopback = FALSE;
mount_path = mnt_fs_get_target (fs);
if ((strcmp (mount_path, "ignore") == 0) ||
(strcmp (mount_path, "swap") == 0) ||
(strcmp (mount_path, "none") == 0))
continue;
mount_fstype = mnt_fs_get_fstype (fs);
mount_options = mnt_fs_strdup_options (fs);
if (mount_options)
{
unsigned long mount_flags = 0;
unsigned long userspace_flags = 0;
mnt_optstr_get_flags (mount_options, &mount_flags, mnt_get_builtin_optmap (MNT_LINUX_MAP));
mnt_optstr_get_flags (mount_options, &userspace_flags, mnt_get_builtin_optmap (MNT_USERSPACE_MAP));
/* We ignore bind fstab entries, as we ignore bind mounts anyway */
if (mount_flags & MS_BIND)
{
g_free (mount_options);
continue;
}
is_read_only = (mount_flags & MS_RDONLY) != 0;
is_loopback = (userspace_flags & MNT_MS_LOOP) != 0;
if ((mount_fstype != NULL && g_strcmp0 ("supermount", mount_fstype) == 0) ||
((userspace_flags & MNT_MS_USER) &&
(g_strstr_len (mount_options, -1, "user_xattr") == NULL)) ||
(g_strstr_len (mount_options, -1, "pamconsole") == NULL) ||
(userspace_flags & MNT_MS_USERS) ||
(userspace_flags & MNT_MS_OWNER))
{
is_user_mountable = TRUE;
}
}
device_path = mnt_fs_get_source (fs);
if (g_strcmp0 (device_path, "/dev/root") == 0)
device_path = _resolve_dev_root ();
mount_point = create_unix_mount_point (device_path,
mount_path,
mount_fstype,
mount_options,
is_read_only,
is_user_mountable,
is_loopback);
if (mount_options)
g_free (mount_options);
return_list = g_list_prepend (return_list, mount_point);
}
mnt_free_iter (iter);
out:
mnt_free_context (ctxt);
return g_list_reverse (return_list);
}
#else
static GList *
_g_get_unix_mount_points (void)
{
#ifdef HAVE_GETMNTENT_R
struct mntent ent;
char buf[1024];
#endif
struct mntent *mntent;
FILE *file;
char *read_file;
GUnixMountPoint *mount_point;
GList *return_list;
read_file = get_fstab_file ();
file = setmntent (read_file, "r");
if (file == NULL)
return NULL;
return_list = NULL;
#ifdef HAVE_GETMNTENT_R
while ((mntent = getmntent_r (file, &ent, buf, sizeof (buf))) != NULL)
#else
G_LOCK (getmntent);
while ((mntent = getmntent (file)) != NULL)
#endif
{
const char *device_path = NULL;
gboolean is_read_only = FALSE;
gboolean is_user_mountable = FALSE;
gboolean is_loopback = FALSE;
if ((strcmp (mntent->mnt_dir, "ignore") == 0) ||
(strcmp (mntent->mnt_dir, "swap") == 0) ||
(strcmp (mntent->mnt_dir, "none") == 0))
continue;
#ifdef HAVE_HASMNTOPT
/* We ignore bind fstab entries, as we ignore bind mounts anyway */
if (hasmntopt (mntent, "bind"))
continue;
#endif
if (strcmp (mntent->mnt_fsname, "/dev/root") == 0)
device_path = _resolve_dev_root ();
else
device_path = mntent->mnt_fsname;
#ifdef HAVE_HASMNTOPT
if (hasmntopt (mntent, MNTOPT_RO) != NULL)
is_read_only = TRUE;
if (hasmntopt (mntent, "loop") != NULL)
is_loopback = TRUE;
#endif
if ((mntent->mnt_type != NULL && strcmp ("supermount", mntent->mnt_type) == 0)
#ifdef HAVE_HASMNTOPT
|| (hasmntopt (mntent, "user") != NULL
&& hasmntopt (mntent, "user") != hasmntopt (mntent, "user_xattr"))
|| hasmntopt (mntent, "pamconsole") != NULL
|| hasmntopt (mntent, "users") != NULL
|| hasmntopt (mntent, "owner") != NULL
#endif
)
is_user_mountable = TRUE;
mount_point = create_unix_mount_point (device_path,
mntent->mnt_dir,
mntent->mnt_type,
mntent->mnt_opts,
is_read_only,
is_user_mountable,
is_loopback);
return_list = g_list_prepend (return_list, mount_point);
}
endmntent (file);
#ifndef HAVE_GETMNTENT_R
G_UNLOCK (getmntent);
#endif
return g_list_reverse (return_list);
}
#endif /* HAVE_LIBMOUNT */
/* mnttab.h {{{2 */
#elif defined (HAVE_SYS_MNTTAB_H)
static GList *
_g_get_unix_mount_points (void)
{
struct mnttab mntent;
FILE *file;
char *read_file;
GUnixMountPoint *mount_point;
GList *return_list;
read_file = get_fstab_file ();
file = setmntent (read_file, "r");
if (file == NULL)
return NULL;
return_list = NULL;
G_LOCK (getmntent);
while (! getmntent (file, &mntent))
{
gboolean is_read_only = FALSE;
gboolean is_user_mountable = FALSE;
gboolean is_loopback = FALSE;
if ((strcmp (mntent.mnt_mountp, "ignore") == 0) ||
(strcmp (mntent.mnt_mountp, "swap") == 0) ||
(strcmp (mntent.mnt_mountp, "none") == 0))
continue;
#ifdef HAVE_HASMNTOPT
if (hasmntopt (&mntent, MNTOPT_RO) != NULL)
is_read_only = TRUE;
if (hasmntopt (&mntent, "lofs") != NULL)
is_loopback = TRUE;
#endif
if ((mntent.mnt_fstype != NULL)
#ifdef HAVE_HASMNTOPT
|| (hasmntopt (&mntent, "user") != NULL
&& hasmntopt (&mntent, "user") != hasmntopt (&mntent, "user_xattr"))
|| hasmntopt (&mntent, "pamconsole") != NULL
|| hasmntopt (&mntent, "users") != NULL
|| hasmntopt (&mntent, "owner") != NULL
#endif
)
is_user_mountable = TRUE;
mount_point = create_unix_mount_point (mntent.mnt_special,
mntent.mnt_mountp,
mntent.mnt_fstype,
mntent.mnt_mntopts,
is_read_only,
is_user_mountable,
is_loopback);
return_list = g_list_prepend (return_list, mount_point);
}
endmntent (file);
G_UNLOCK (getmntent);
return g_list_reverse (return_list);
}
/* mntctl.h (AIX) {{{2 */
#elif defined(HAVE_SYS_MNTCTL_H) && defined(HAVE_SYS_VMOUNT_H) && defined(HAVE_SYS_VFS_H)
/* functions to parse /etc/filesystems on aix */
/* read character, ignoring comments (begin with '*', end with '\n' */
static int
aix_fs_getc (FILE *fd)
{
int c;
while ((c = getc (fd)) == '*')
{
while (((c = getc (fd)) != '\n') && (c != EOF))
;
}
}
/* eat all continuous spaces in a file */
static int
aix_fs_ignorespace (FILE *fd)
{
int c;
while ((c = aix_fs_getc (fd)) != EOF)
{
if (!g_ascii_isspace (c))
{
ungetc (c,fd);
return c;
}
}
return EOF;
}
/* read one word from file */
static int
aix_fs_getword (FILE *fd,
char *word)
{
int c;
aix_fs_ignorespace (fd);
while (((c = aix_fs_getc (fd)) != EOF) && !g_ascii_isspace (c))
{
if (c == '"')
{
while (((c = aix_fs_getc (fd)) != EOF) && (c != '"'))
*word++ = c;
else
*word++ = c;
}
}
*word = 0;
return c;
}
typedef struct {
char mnt_mount[PATH_MAX];
char mnt_special[PATH_MAX];
char mnt_fstype[16];
char mnt_options[128];
} AixMountTableEntry;
/* read mount points properties */
static int
aix_fs_get (FILE *fd,
AixMountTableEntry *prop)
{
static char word[PATH_MAX] = { 0 };
char value[PATH_MAX];
/* read stanza */
if (word[0] == 0)
{
if (aix_fs_getword (fd, word) == EOF)
return EOF;
}
word[strlen(word) - 1] = 0;
strcpy (prop->mnt_mount, word);
/* read attributes and value */
while (aix_fs_getword (fd, word) != EOF)
{
/* test if is attribute or new stanza */
if (word[strlen(word) - 1] == ':')
return 0;
/* read "=" */
aix_fs_getword (fd, value);
/* read value */
aix_fs_getword (fd, value);
if (strcmp (word, "dev") == 0)
strcpy (prop->mnt_special, value);
else if (strcmp (word, "vfs") == 0)
strcpy (prop->mnt_fstype, value);
else if (strcmp (word, "options") == 0)
strcpy(prop->mnt_options, value);
}
return 0;
}
static GList *
_g_get_unix_mount_points (void)
{
struct mntent *mntent;
FILE *file;
char *read_file;
GUnixMountPoint *mount_point;
AixMountTableEntry mntent;
GList *return_list;
read_file = get_fstab_file ();
file = setmntent (read_file, "r");
if (file == NULL)
return NULL;
return_list = NULL;
while (!aix_fs_get (file, &mntent))
{
if (strcmp ("cdrfs", mntent.mnt_fstype) == 0)
{
mount_point = create_unix_mount_point (mntent.mnt_special,
mntent.mnt_mount,
mntent.mnt_fstype,
mntent.mnt_options,
TRUE,
TRUE,
FALSE);
return_list = g_list_prepend (return_list, mount_point);
}
}
endmntent (file);
return g_list_reverse (return_list);
}
#elif (defined(HAVE_GETVFSSTAT) || defined(HAVE_GETFSSTAT)) && defined(HAVE_FSTAB_H) && defined(HAVE_SYS_MOUNT_H)
static GList *
_g_get_unix_mount_points (void)
{
struct fstab *fstab = NULL;
GUnixMountPoint *mount_point;
GList *return_list;
#ifdef HAVE_SYS_SYSCTL_H
int usermnt = 0;
size_t len = sizeof(usermnt);
struct stat sb;
#endif
if (!setfsent ())
return NULL;
return_list = NULL;
#ifdef HAVE_SYS_SYSCTL_H
#if defined(HAVE_SYSCTLBYNAME)
sysctlbyname ("vfs.usermount", &usermnt, &len, NULL, 0);
#elif defined(CTL_VFS) && defined(VFS_USERMOUNT)
{
int mib[2];
mib[0] = CTL_VFS;
mib[1] = VFS_USERMOUNT;
sysctl (mib, 2, &usermnt, &len, NULL, 0);
}
#elif defined(CTL_KERN) && defined(KERN_USERMOUNT)
{
int mib[2];
mib[0] = CTL_KERN;
mib[1] = KERN_USERMOUNT;
sysctl (mib, 2, &usermnt, &len, NULL, 0);
}
#endif
#endif
while ((fstab = getfsent ()) != NULL)
{
gboolean is_read_only = FALSE;
gboolean is_user_mountable = FALSE;
if (strcmp (fstab->fs_vfstype, "swap") == 0)
continue;
if (strcmp (fstab->fs_type, "ro") == 0)
is_read_only = TRUE;
#ifdef HAVE_SYS_SYSCTL_H
if (usermnt != 0)
{
uid_t uid = getuid ();
if (stat (fstab->fs_file, &sb) == 0)
{
if (uid == 0 || sb.st_uid == uid)
is_user_mountable = TRUE;
}
}
#endif
mount_point = create_unix_mount_point (fstab->fs_spec,
fstab->fs_file,
fstab->fs_vfstype,
fstab->fs_mntops,
is_read_only,
is_user_mountable,
FALSE);
return_list = g_list_prepend (return_list, mount_point);
}
endfsent ();
return g_list_reverse (return_list);
}
/* Interix {{{2 */
#elif defined(__INTERIX)
static GList *
_g_get_unix_mount_points (void)
{
return _g_get_unix_mounts ();
}
/* Common code {{{2 */
#else
#error No g_get_mount_table() implementation for system
#endif
static guint64
get_mounts_timestamp (void)
{
const char *monitor_file;
struct stat buf;
monitor_file = get_mtab_monitor_file ();
if (monitor_file)
{
if (stat (monitor_file, &buf) == 0)
return (guint64)buf.st_mtime;
}
else
{
return mount_poller_time;
}
return 0;
}
static guint64
get_mount_points_timestamp (void)
{
const char *monitor_file;
struct stat buf;
monitor_file = get_fstab_file ();
if (monitor_file)
{
if (stat (monitor_file, &buf) == 0)
return (guint64)buf.st_mtime;
}
return 0;
}
/**
* g_unix_mounts_get: (skip)
* @time_read: (out) (optional): guint64 to contain a timestamp, or %NULL
*
* Gets a #GList of #GUnixMountEntry containing the unix mounts.
* If @time_read is set, it will be filled with the mount
* timestamp, allowing for checking if the mounts have changed
* with g_unix_mounts_changed_since().
*
* Returns: (element-type GUnixMountEntry) (transfer full):
* a #GList of the UNIX mounts.
**/
GList *
g_unix_mounts_get (guint64 *time_read)
{
if (time_read)
*time_read = get_mounts_timestamp ();
return _g_get_unix_mounts ();
}
/**
* g_unix_mount_at: (skip)
* @mount_path: path for a possible unix mount.
* @time_read: (out) (optional): guint64 to contain a timestamp.
*
* Gets a #GUnixMountEntry for a given mount path. If @time_read
* is set, it will be filled with a unix timestamp for checking
* if the mounts have changed since with g_unix_mounts_changed_since().
*
* Returns: (transfer full): a #GUnixMountEntry.
**/
GUnixMountEntry *
g_unix_mount_at (const char *mount_path,
guint64 *time_read)
{
GList *mounts, *l;
GUnixMountEntry *mount_entry, *found;
mounts = g_unix_mounts_get (time_read);
found = NULL;
for (l = mounts; l != NULL; l = l->next)
{
mount_entry = l->data;
if (!found && strcmp (mount_path, mount_entry->mount_path) == 0)
found = mount_entry;
else
g_unix_mount_free (mount_entry);
}
g_list_free (mounts);
return found;
}
/**
* g_unix_mount_for: (skip)
* @file_path: file path on some unix mount.
* @time_read: (out) (optional): guint64 to contain a timestamp.
*
* Gets a #GUnixMountEntry for a given file path. If @time_read
* is set, it will be filled with a unix timestamp for checking
* if the mounts have changed since with g_unix_mounts_changed_since().
*
* Returns: (transfer full): a #GUnixMountEntry.
*
* Since: 2.52
**/
GUnixMountEntry *
g_unix_mount_for (const char *file_path,
guint64 *time_read)
{
GUnixMountEntry *entry;
g_return_val_if_fail (file_path != NULL, NULL);
entry = g_unix_mount_at (file_path, time_read);
if (entry == NULL)
{
char *topdir;
topdir = _g_local_file_find_topdir_for (file_path);
if (topdir != NULL)
{
entry = g_unix_mount_at (topdir, time_read);
g_free (topdir);
}
}
return entry;
}
/**
* g_unix_mount_points_get: (skip)
* @time_read: (out) (optional): guint64 to contain a timestamp.
*
* Gets a #GList of #GUnixMountPoint containing the unix mount points.
* If @time_read is set, it will be filled with the mount timestamp,
* allowing for checking if the mounts have changed with
* g_unix_mount_points_changed_since().
*
* Returns: (element-type GUnixMountPoint) (transfer full):
* a #GList of the UNIX mountpoints.
**/
GList *
g_unix_mount_points_get (guint64 *time_read)
{
if (time_read)
*time_read = get_mount_points_timestamp ();
return _g_get_unix_mount_points ();
}
/**
* g_unix_mounts_changed_since:
* @time: guint64 to contain a timestamp.
*
* Checks if the unix mounts have changed since a given unix time.
*
* Returns: %TRUE if the mounts have changed since @time.
**/
gboolean
g_unix_mounts_changed_since (guint64 time)
{
return get_mounts_timestamp () != time;
}
/**
* g_unix_mount_points_changed_since:
* @time: guint64 to contain a timestamp.
*
* Checks if the unix mount points have changed since a given unix time.
*
* Returns: %TRUE if the mount points have changed since @time.
**/
gboolean
g_unix_mount_points_changed_since (guint64 time)
{
return get_mount_points_timestamp () != time;
}
/* GUnixMountMonitor {{{1 */
enum {
MOUNTS_CHANGED,
MOUNTPOINTS_CHANGED,
LAST_SIGNAL
};
static guint signals[LAST_SIGNAL];
struct _GUnixMountMonitor {
GObject parent;
GMainContext *context;
};
struct _GUnixMountMonitorClass {
GObjectClass parent_class;
};
G_DEFINE_TYPE (GUnixMountMonitor, g_unix_mount_monitor, G_TYPE_OBJECT);
static GContextSpecificGroup mount_monitor_group;
static GFileMonitor *fstab_monitor;
static GFileMonitor *mtab_monitor;
static GSource *proc_mounts_watch_source;
static GList *mount_poller_mounts;
static void
fstab_file_changed (GFileMonitor *monitor,
GFile *file,
GFile *other_file,
GFileMonitorEvent event_type,
gpointer user_data)
{
if (event_type != G_FILE_MONITOR_EVENT_CHANGED &&
event_type != G_FILE_MONITOR_EVENT_CREATED &&
event_type != G_FILE_MONITOR_EVENT_DELETED)
return;
g_context_specific_group_emit (&mount_monitor_group, signals[MOUNTPOINTS_CHANGED]);
}
static void
mtab_file_changed (GFileMonitor *monitor,
GFile *file,
GFile *other_file,
GFileMonitorEvent event_type,
gpointer user_data)
{
if (event_type != G_FILE_MONITOR_EVENT_CHANGED &&
event_type != G_FILE_MONITOR_EVENT_CREATED &&
event_type != G_FILE_MONITOR_EVENT_DELETED)
return;
g_context_specific_group_emit (&mount_monitor_group, signals[MOUNTS_CHANGED]);
}
static gboolean
proc_mounts_changed (GIOChannel *channel,
GIOCondition cond,
gpointer user_data)
{
if (cond & G_IO_ERR)
g_context_specific_group_emit (&mount_monitor_group, signals[MOUNTS_CHANGED]);
return TRUE;
}
static gboolean
mount_change_poller (gpointer user_data)
{
GList *current_mounts, *new_it, *old_it;
gboolean has_changed = FALSE;
current_mounts = _g_get_unix_mounts ();
for ( new_it = current_mounts, old_it = mount_poller_mounts;
new_it != NULL && old_it != NULL;
new_it = g_list_next (new_it), old_it = g_list_next (old_it) )
{
if (g_unix_mount_compare (new_it->data, old_it->data) != 0)
{
has_changed = TRUE;
break;
}
}
if (!(new_it == NULL && old_it == NULL))
has_changed = TRUE;
g_list_free_full (mount_poller_mounts, (GDestroyNotify) g_unix_mount_free);
mount_poller_mounts = current_mounts;
if (has_changed)
{
mount_poller_time = (guint64) g_get_monotonic_time ();
g_context_specific_group_emit (&mount_monitor_group, signals[MOUNTPOINTS_CHANGED]);
}
return TRUE;
}
static void
mount_monitor_stop (void)
{
if (fstab_monitor)
{
g_file_monitor_cancel (fstab_monitor);
g_object_unref (fstab_monitor);
}
if (proc_mounts_watch_source != NULL)
g_source_destroy (proc_mounts_watch_source);
if (mtab_monitor)
{
g_file_monitor_cancel (mtab_monitor);
g_object_unref (mtab_monitor);
}
g_list_free_full (mount_poller_mounts, (GDestroyNotify) g_unix_mount_free);
}
static void
mount_monitor_start (void)
{
GFile *file;
if (get_fstab_file () != NULL)
{
file = g_file_new_for_path (get_fstab_file ());
fstab_monitor = g_file_monitor_file (file, 0, NULL, NULL);
g_object_unref (file);
g_signal_connect (fstab_monitor, "changed", (GCallback)fstab_file_changed, NULL);
}
if (get_mtab_monitor_file () != NULL)
{
const gchar *mtab_path;
mtab_path = get_mtab_monitor_file ();
/* Monitoring files in /proc/ is special - can't just use GFileMonitor.
* See 'man proc' for more details.
*/
if (g_str_has_prefix (mtab_path, "/proc/"))
{
GIOChannel *proc_mounts_channel;
GError *error = NULL;
proc_mounts_channel = g_io_channel_new_file (mtab_path, "r", &error);
if (proc_mounts_channel == NULL)
{
g_warning ("Error creating IO channel for %s: %s (%s, %d)", mtab_path,
error->message, g_quark_to_string (error->domain), error->code);
g_error_free (error);
}
else
{
proc_mounts_watch_source = g_io_create_watch (proc_mounts_channel, G_IO_ERR);
g_source_set_callback (proc_mounts_watch_source,
(GSourceFunc) proc_mounts_changed,
NULL, NULL);
g_source_attach (proc_mounts_watch_source,
g_main_context_get_thread_default ());
g_source_unref (proc_mounts_watch_source);
g_io_channel_unref (proc_mounts_channel);
}
}
else
{
file = g_file_new_for_path (mtab_path);
mtab_monitor = g_file_monitor_file (file, 0, NULL, NULL);
g_object_unref (file);
g_signal_connect (mtab_monitor, "changed", (GCallback)mtab_file_changed, NULL);
}
}
else
{
proc_mounts_watch_source = g_timeout_source_new_seconds (3);
mount_poller_mounts = _g_get_unix_mounts ();
mount_poller_time = (guint64)g_get_monotonic_time ();
g_source_set_callback (proc_mounts_watch_source,
mount_change_poller,
NULL, NULL);
g_source_attach (proc_mounts_watch_source,
g_main_context_get_thread_default ());
g_source_unref (proc_mounts_watch_source);
}
}
static void
g_unix_mount_monitor_finalize (GObject *object)
{
GUnixMountMonitor *monitor;
monitor = G_UNIX_MOUNT_MONITOR (object);
g_context_specific_group_remove (&mount_monitor_group, monitor->context, monitor, mount_monitor_stop);
G_OBJECT_CLASS (g_unix_mount_monitor_parent_class)->finalize (object);
}
static void
g_unix_mount_monitor_class_init (GUnixMountMonitorClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
gobject_class->finalize = g_unix_mount_monitor_finalize;
/**
* GUnixMountMonitor::mounts-changed:
* @monitor: the object on which the signal is emitted
*
* Emitted when the unix mounts have changed.
*/
signals[MOUNTS_CHANGED] =
g_signal_new (I_("mounts-changed"),
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
0,
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
/**
* GUnixMountMonitor::mountpoints-changed:
* @monitor: the object on which the signal is emitted
*
* Emitted when the unix mount points have changed.
*/
signals[MOUNTPOINTS_CHANGED] =
g_signal_new (I_("mountpoints-changed"),
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
0,
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
}
static void
g_unix_mount_monitor_init (GUnixMountMonitor *monitor)
{
}
/**
* g_unix_mount_monitor_set_rate_limit:
* @mount_monitor: a #GUnixMountMonitor
* @limit_msec: a integer with the limit in milliseconds to
* poll for changes.
*
* This function does nothing.
*
* Before 2.44, this was a partially-effective way of controlling the
* rate at which events would be reported under some uncommon
* circumstances. Since @mount_monitor is a singleton, it also meant
* that calling this function would have side effects for other users of
* the monitor.
*
* Since: 2.18
*
* Deprecated:2.44:This function does nothing. Don't call it.
*/
void
g_unix_mount_monitor_set_rate_limit (GUnixMountMonitor *mount_monitor,
gint limit_msec)
{
}
/**
* g_unix_mount_monitor_get:
*
* Gets the #GUnixMountMonitor for the current thread-default main
* context.
*
* The mount monitor can be used to monitor for changes to the list of
* mounted filesystems as well as the list of mount points (ie: fstab
* entries).
*
* You must only call g_object_unref() on the return value from under
* the same main context as you called this function.
*
* Returns: (transfer full): the #GUnixMountMonitor.
*
* Since: 2.44
**/
GUnixMountMonitor *
g_unix_mount_monitor_get (void)
{
return g_context_specific_group_get (&mount_monitor_group,
G_TYPE_UNIX_MOUNT_MONITOR,
G_STRUCT_OFFSET(GUnixMountMonitor, context),
mount_monitor_start);
}
/**
* g_unix_mount_monitor_new:
*
* Deprecated alias for g_unix_mount_monitor_get().
*
* This function was never a true constructor, which is why it was
* renamed.
*
* Returns: a #GUnixMountMonitor.
*
* Deprecated:2.44:Use g_unix_mount_monitor_get() instead.
*/
GUnixMountMonitor *
g_unix_mount_monitor_new (void)
{
return g_unix_mount_monitor_get ();
}
/* GUnixMount {{{1 */
/**
* g_unix_mount_free:
* @mount_entry: a #GUnixMountEntry.
*
* Frees a unix mount.
*/
void
g_unix_mount_free (GUnixMountEntry *mount_entry)
{
g_return_if_fail (mount_entry != NULL);
g_free (mount_entry->mount_path);
g_free (mount_entry->device_path);
g_free (mount_entry->filesystem_type);
g_free (mount_entry);
}
/**
* g_unix_mount_point_free:
* @mount_point: unix mount point to free.
*
* Frees a unix mount point.
*/
void
g_unix_mount_point_free (GUnixMountPoint *mount_point)
{
g_return_if_fail (mount_point != NULL);
g_free (mount_point->mount_path);
g_free (mount_point->device_path);
g_free (mount_point->filesystem_type);
g_free (mount_point->options);
g_free (mount_point);
}
/**
* g_unix_mount_compare:
* @mount1: first #GUnixMountEntry to compare.
* @mount2: second #GUnixMountEntry to compare.
*
* Compares two unix mounts.
*
* Returns: 1, 0 or -1 if @mount1 is greater than, equal to,
* or less than @mount2, respectively.
*/
gint
g_unix_mount_compare (GUnixMountEntry *mount1,
GUnixMountEntry *mount2)
{
int res;
g_return_val_if_fail (mount1 != NULL && mount2 != NULL, 0);
res = g_strcmp0 (mount1->mount_path, mount2->mount_path);
if (res != 0)
return res;
res = g_strcmp0 (mount1->device_path, mount2->device_path);
if (res != 0)
return res;
res = g_strcmp0 (mount1->filesystem_type, mount2->filesystem_type);
if (res != 0)
return res;
res = mount1->is_read_only - mount2->is_read_only;
if (res != 0)
return res;
return 0;
}
/**
* g_unix_mount_get_mount_path:
* @mount_entry: input #GUnixMountEntry to get the mount path for.
*
* Gets the mount path for a unix mount.
*
* Returns: (type filename): the mount path for @mount_entry.
*/
const gchar *
g_unix_mount_get_mount_path (GUnixMountEntry *mount_entry)
{
g_return_val_if_fail (mount_entry != NULL, NULL);
return mount_entry->mount_path;
}
/**
* g_unix_mount_get_device_path:
* @mount_entry: a #GUnixMount.
*
* Gets the device path for a unix mount.
*
* Returns: (type filename): a string containing the device path.
*/
const gchar *
g_unix_mount_get_device_path (GUnixMountEntry *mount_entry)
{
g_return_val_if_fail (mount_entry != NULL, NULL);
return mount_entry->device_path;
}
/**
* g_unix_mount_get_fs_type:
* @mount_entry: a #GUnixMount.
*
* Gets the filesystem type for the unix mount.
*
* Returns: a string containing the file system type.
*/
const gchar *
g_unix_mount_get_fs_type (GUnixMountEntry *mount_entry)
{
g_return_val_if_fail (mount_entry != NULL, NULL);
return mount_entry->filesystem_type;
}
/**
* g_unix_mount_is_readonly:
* @mount_entry: a #GUnixMount.
*
* Checks if a unix mount is mounted read only.
*
* Returns: %TRUE if @mount_entry is read only.
*/
gboolean
g_unix_mount_is_readonly (GUnixMountEntry *mount_entry)
{
g_return_val_if_fail (mount_entry != NULL, FALSE);
return mount_entry->is_read_only;
}
/**
* g_unix_mount_is_system_internal:
* @mount_entry: a #GUnixMount.
*
* Checks if a unix mount is a system path.
*
* Returns: %TRUE if the unix mount is for a system path.
*/
gboolean
g_unix_mount_is_system_internal (GUnixMountEntry *mount_entry)
{
g_return_val_if_fail (mount_entry != NULL, FALSE);
return mount_entry->is_system_internal;
}
/* GUnixMountPoint {{{1 */
/**
* g_unix_mount_point_compare:
* @mount1: a #GUnixMount.
* @mount2: a #GUnixMount.
*
* Compares two unix mount points.
*
* Returns: 1, 0 or -1 if @mount1 is greater than, equal to,
* or less than @mount2, respectively.
*/
gint
g_unix_mount_point_compare (GUnixMountPoint *mount1,
GUnixMountPoint *mount2)
{
int res;
g_return_val_if_fail (mount1 != NULL && mount2 != NULL, 0);
res = g_strcmp0 (mount1->mount_path, mount2->mount_path);
if (res != 0)
return res;
res = g_strcmp0 (mount1->device_path, mount2->device_path);
if (res != 0)
return res;
res = g_strcmp0 (mount1->filesystem_type, mount2->filesystem_type);
if (res != 0)
return res;
res = g_strcmp0 (mount1->options, mount2->options);
if (res != 0)
return res;
res = mount1->is_read_only - mount2->is_read_only;
if (res != 0)
return res;
res = mount1->is_user_mountable - mount2->is_user_mountable;
if (res != 0)
return res;
res = mount1->is_loopback - mount2->is_loopback;
if (res != 0)
return res;
return 0;
}
/**
* g_unix_mount_point_get_mount_path:
* @mount_point: a #GUnixMountPoint.
*
* Gets the mount path for a unix mount point.
*
* Returns: (type filename): a string containing the mount path.
*/
const gchar *
g_unix_mount_point_get_mount_path (GUnixMountPoint *mount_point)
{
g_return_val_if_fail (mount_point != NULL, NULL);
return mount_point->mount_path;
}
/**
* g_unix_mount_point_get_device_path:
* @mount_point: a #GUnixMountPoint.
*
* Gets the device path for a unix mount point.
*
* Returns: (type filename): a string containing the device path.
*/
const gchar *
g_unix_mount_point_get_device_path (GUnixMountPoint *mount_point)
{
g_return_val_if_fail (mount_point != NULL, NULL);
return mount_point->device_path;
}
/**
* g_unix_mount_point_get_fs_type:
* @mount_point: a #GUnixMountPoint.
*
* Gets the file system type for the mount point.
*
* Returns: a string containing the file system type.
*/
const gchar *
g_unix_mount_point_get_fs_type (GUnixMountPoint *mount_point)
{
g_return_val_if_fail (mount_point != NULL, NULL);
return mount_point->filesystem_type;
}
/**
* g_unix_mount_point_get_options:
* @mount_point: a #GUnixMountPoint.
*
* Gets the options for the mount point.
*
* Returns: a string containing the options.
*
* Since: 2.32
*/
const gchar *
g_unix_mount_point_get_options (GUnixMountPoint *mount_point)
{
g_return_val_if_fail (mount_point != NULL, NULL);
return mount_point->options;
}
/**
* g_unix_mount_point_is_readonly:
* @mount_point: a #GUnixMountPoint.
*
* Checks if a unix mount point is read only.
*
* Returns: %TRUE if a mount point is read only.
*/
gboolean
g_unix_mount_point_is_readonly (GUnixMountPoint *mount_point)
{
g_return_val_if_fail (mount_point != NULL, FALSE);
return mount_point->is_read_only;
}
/**
* g_unix_mount_point_is_user_mountable:
* @mount_point: a #GUnixMountPoint.
*
* Checks if a unix mount point is mountable by the user.
*
* Returns: %TRUE if the mount point is user mountable.
*/
gboolean
g_unix_mount_point_is_user_mountable (GUnixMountPoint *mount_point)
{
g_return_val_if_fail (mount_point != NULL, FALSE);
return mount_point->is_user_mountable;
}
/**
* g_unix_mount_point_is_loopback:
* @mount_point: a #GUnixMountPoint.
*
* Checks if a unix mount point is a loopback device.
*
* Returns: %TRUE if the mount point is a loopback. %FALSE otherwise.
*/
gboolean
g_unix_mount_point_is_loopback (GUnixMountPoint *mount_point)
{
g_return_val_if_fail (mount_point != NULL, FALSE);
return mount_point->is_loopback;
}
static GUnixMountType
guess_mount_type (const char *mount_path,
const char *device_path,
const char *filesystem_type)
{
GUnixMountType type;
char *basename;
type = G_UNIX_MOUNT_TYPE_UNKNOWN;
if ((strcmp (filesystem_type, "udf") == 0) ||
(strcmp (filesystem_type, "iso9660") == 0) ||
(strcmp (filesystem_type, "cd9660") == 0))
type = G_UNIX_MOUNT_TYPE_CDROM;
else if ((strcmp (filesystem_type, "nfs") == 0) ||
(strcmp (filesystem_type, "nfs4") == 0))
type = G_UNIX_MOUNT_TYPE_NFS;
else if (g_str_has_prefix (device_path, "/vol/dev/diskette/") ||
g_str_has_prefix (device_path, "/dev/fd") ||
g_str_has_prefix (device_path, "/dev/floppy"))
type = G_UNIX_MOUNT_TYPE_FLOPPY;
else if (g_str_has_prefix (device_path, "/dev/cdrom") ||
g_str_has_prefix (device_path, "/dev/acd") ||
g_str_has_prefix (device_path, "/dev/cd"))
type = G_UNIX_MOUNT_TYPE_CDROM;
else if (g_str_has_prefix (device_path, "/vol/"))
{
const char *name = mount_path + strlen ("/");
if (g_str_has_prefix (name, "cdrom"))
type = G_UNIX_MOUNT_TYPE_CDROM;
else if (g_str_has_prefix (name, "floppy") ||
g_str_has_prefix (device_path, "/vol/dev/diskette/"))
type = G_UNIX_MOUNT_TYPE_FLOPPY;
else if (g_str_has_prefix (name, "rmdisk"))
type = G_UNIX_MOUNT_TYPE_ZIP;
else if (g_str_has_prefix (name, "jaz"))
type = G_UNIX_MOUNT_TYPE_JAZ;
else if (g_str_has_prefix (name, "memstick"))
type = G_UNIX_MOUNT_TYPE_MEMSTICK;
}
else
{
basename = g_path_get_basename (mount_path);
if (g_str_has_prefix (basename, "cdr") ||
g_str_has_prefix (basename, "cdwriter") ||
g_str_has_prefix (basename, "burn") ||
g_str_has_prefix (basename, "dvdr"))
type = G_UNIX_MOUNT_TYPE_CDROM;
else if (g_str_has_prefix (basename, "floppy"))
type = G_UNIX_MOUNT_TYPE_FLOPPY;
else if (g_str_has_prefix (basename, "zip"))
type = G_UNIX_MOUNT_TYPE_ZIP;
else if (g_str_has_prefix (basename, "jaz"))
type = G_UNIX_MOUNT_TYPE_JAZ;
else if (g_str_has_prefix (basename, "camera"))
type = G_UNIX_MOUNT_TYPE_CAMERA;
else if (g_str_has_prefix (basename, "memstick") ||
g_str_has_prefix (basename, "memory_stick") ||
g_str_has_prefix (basename, "ram"))
type = G_UNIX_MOUNT_TYPE_MEMSTICK;
else if (g_str_has_prefix (basename, "compact_flash"))
type = G_UNIX_MOUNT_TYPE_CF;
else if (g_str_has_prefix (basename, "smart_media"))
type = G_UNIX_MOUNT_TYPE_SM;
else if (g_str_has_prefix (basename, "sd_mmc"))
type = G_UNIX_MOUNT_TYPE_SDMMC;
else if (g_str_has_prefix (basename, "ipod"))
type = G_UNIX_MOUNT_TYPE_IPOD;
g_free (basename);
}
if (type == G_UNIX_MOUNT_TYPE_UNKNOWN)
type = G_UNIX_MOUNT_TYPE_HD;
return type;
}
/**
* g_unix_mount_guess_type:
* @mount_entry: a #GUnixMount.
*
* Guesses the type of a unix mount. If the mount type cannot be
* determined, returns %G_UNIX_MOUNT_TYPE_UNKNOWN.
*
* Returns: a #GUnixMountType.
*/
static GUnixMountType
g_unix_mount_guess_type (GUnixMountEntry *mount_entry)
{
g_return_val_if_fail (mount_entry != NULL, G_UNIX_MOUNT_TYPE_UNKNOWN);
g_return_val_if_fail (mount_entry->mount_path != NULL, G_UNIX_MOUNT_TYPE_UNKNOWN);
g_return_val_if_fail (mount_entry->device_path != NULL, G_UNIX_MOUNT_TYPE_UNKNOWN);
g_return_val_if_fail (mount_entry->filesystem_type != NULL, G_UNIX_MOUNT_TYPE_UNKNOWN);
return guess_mount_type (mount_entry->mount_path,
mount_entry->device_path,
mount_entry->filesystem_type);
}
/**
* g_unix_mount_point_guess_type:
* @mount_point: a #GUnixMountPoint.
*
* Guesses the type of a unix mount point.
* If the mount type cannot be determined,
* returns %G_UNIX_MOUNT_TYPE_UNKNOWN.
*
* Returns: a #GUnixMountType.
*/
static GUnixMountType
g_unix_mount_point_guess_type (GUnixMountPoint *mount_point)
{
g_return_val_if_fail (mount_point != NULL, G_UNIX_MOUNT_TYPE_UNKNOWN);
g_return_val_if_fail (mount_point->mount_path != NULL, G_UNIX_MOUNT_TYPE_UNKNOWN);
g_return_val_if_fail (mount_point->device_path != NULL, G_UNIX_MOUNT_TYPE_UNKNOWN);
g_return_val_if_fail (mount_point->filesystem_type != NULL, G_UNIX_MOUNT_TYPE_UNKNOWN);
return guess_mount_type (mount_point->mount_path,
mount_point->device_path,
mount_point->filesystem_type);
}
static const char *
type_to_icon (GUnixMountType type, gboolean is_mount_point, gboolean use_symbolic)
{
const char *icon_name;
switch (type)
{
case G_UNIX_MOUNT_TYPE_HD:
if (is_mount_point)
icon_name = use_symbolic ? "drive-removable-media-symbolic" : "drive-removable-media";
else
icon_name = use_symbolic ? "drive-harddisk-symbolic" : "drive-harddisk";
break;
case G_UNIX_MOUNT_TYPE_FLOPPY:
case G_UNIX_MOUNT_TYPE_ZIP:
case G_UNIX_MOUNT_TYPE_JAZ:
if (is_mount_point)
icon_name = use_symbolic ? "drive-removable-media-symbolic" : "drive-removable-media";
else
icon_name = use_symbolic ? "media-removable-symbolic" : "media-floppy";
break;
case G_UNIX_MOUNT_TYPE_CDROM:
if (is_mount_point)
icon_name = use_symbolic ? "drive-optical-symbolic" : "drive-optical";
else
icon_name = use_symbolic ? "media-optical-symbolic" : "media-optical";
break;
case G_UNIX_MOUNT_TYPE_NFS:
icon_name = use_symbolic ? "folder-remote-symbolic" : "folder-remote";
break;
case G_UNIX_MOUNT_TYPE_MEMSTICK:
if (is_mount_point)
icon_name = use_symbolic ? "drive-removable-media-symbolic" : "drive-removable-media";
else
icon_name = use_symbolic ? "media-removable-symbolic" : "media-flash";
break;
case G_UNIX_MOUNT_TYPE_CAMERA:
if (is_mount_point)
icon_name = use_symbolic ? "drive-removable-media-symbolic" : "drive-removable-media";
else
icon_name = use_symbolic ? "camera-photo-symbolic" : "camera-photo";
break;
case G_UNIX_MOUNT_TYPE_IPOD:
if (is_mount_point)
icon_name = use_symbolic ? "drive-removable-media-symbolic" : "drive-removable-media";
else
icon_name = use_symbolic ? "multimedia-player-symbolic" : "multimedia-player";
break;
case G_UNIX_MOUNT_TYPE_UNKNOWN:
default:
if (is_mount_point)
icon_name = use_symbolic ? "drive-removable-media-symbolic" : "drive-removable-media";
else
icon_name = use_symbolic ? "drive-harddisk-symbolic" : "drive-harddisk";
break;
}
return icon_name;
}
/**
* g_unix_mount_guess_name:
* @mount_entry: a #GUnixMountEntry
*
* Guesses the name of a Unix mount.
* The result is a translated string.
*
* Returns: A newly allocated string that must
* be freed with g_free()
*/
gchar *
g_unix_mount_guess_name (GUnixMountEntry *mount_entry)
{
char *name;
if (strcmp (mount_entry->mount_path, "/") == 0)
name = g_strdup (_("Filesystem root"));
else
name = g_filename_display_basename (mount_entry->mount_path);
return name;
}
/**
* g_unix_mount_guess_icon:
* @mount_entry: a #GUnixMountEntry
*
* Guesses the icon of a Unix mount.
*
* Returns: (transfer full): a #GIcon
*/
GIcon *
g_unix_mount_guess_icon (GUnixMountEntry *mount_entry)
{
return g_themed_icon_new_with_default_fallbacks (type_to_icon (g_unix_mount_guess_type (mount_entry), FALSE, FALSE));
}
/**
* g_unix_mount_guess_symbolic_icon:
* @mount_entry: a #GUnixMountEntry
*
* Guesses the symbolic icon of a Unix mount.
*
* Returns: (transfer full): a #GIcon
*
* Since: 2.34
*/
GIcon *
g_unix_mount_guess_symbolic_icon (GUnixMountEntry *mount_entry)
{
return g_themed_icon_new_with_default_fallbacks (type_to_icon (g_unix_mount_guess_type (mount_entry), FALSE, TRUE));
}
/**
* g_unix_mount_point_guess_name:
* @mount_point: a #GUnixMountPoint
*
* Guesses the name of a Unix mount point.
* The result is a translated string.
*
* Returns: A newly allocated string that must
* be freed with g_free()
*/
gchar *
g_unix_mount_point_guess_name (GUnixMountPoint *mount_point)
{
char *name;
if (strcmp (mount_point->mount_path, "/") == 0)
name = g_strdup (_("Filesystem root"));
else
name = g_filename_display_basename (mount_point->mount_path);
return name;
}
/**
* g_unix_mount_point_guess_icon:
* @mount_point: a #GUnixMountPoint
*
* Guesses the icon of a Unix mount point.
*
* Returns: (transfer full): a #GIcon
*/
GIcon *
g_unix_mount_point_guess_icon (GUnixMountPoint *mount_point)
{
return g_themed_icon_new_with_default_fallbacks (type_to_icon (g_unix_mount_point_guess_type (mount_point), TRUE, FALSE));
}
/**
* g_unix_mount_point_guess_symbolic_icon:
* @mount_point: a #GUnixMountPoint
*
* Guesses the symbolic icon of a Unix mount point.
*
* Returns: (transfer full): a #GIcon
*
* Since: 2.34
*/
GIcon *
g_unix_mount_point_guess_symbolic_icon (GUnixMountPoint *mount_point)
{
return g_themed_icon_new_with_default_fallbacks (type_to_icon (g_unix_mount_point_guess_type (mount_point), TRUE, TRUE));
}
/**
* g_unix_mount_guess_can_eject:
* @mount_entry: a #GUnixMountEntry
*
* Guesses whether a Unix mount can be ejected.
*
* Returns: %TRUE if @mount_entry is deemed to be ejectable.
*/
gboolean
g_unix_mount_guess_can_eject (GUnixMountEntry *mount_entry)
{
GUnixMountType guessed_type;
guessed_type = g_unix_mount_guess_type (mount_entry);
if (guessed_type == G_UNIX_MOUNT_TYPE_IPOD ||
guessed_type == G_UNIX_MOUNT_TYPE_CDROM)
return TRUE;
return FALSE;
}
/**
* g_unix_mount_guess_should_display:
* @mount_entry: a #GUnixMountEntry
*
* Guesses whether a Unix mount should be displayed in the UI.
*
* Returns: %TRUE if @mount_entry is deemed to be displayable.
*/
gboolean
g_unix_mount_guess_should_display (GUnixMountEntry *mount_entry)
{
const char *mount_path;
const gchar *user_name;
gsize user_name_len;
/* Never display internal mountpoints */
if (g_unix_mount_is_system_internal (mount_entry))
return FALSE;
/* Only display things in /media (which are generally user mountable)
and home dir (fuse stuff) and /run/media/$USER */
mount_path = mount_entry->mount_path;
if (mount_path != NULL)
{
gboolean is_in_runtime_dir = FALSE;
/* Hide mounts within a dot path, suppose it was a purpose to hide this mount */
if (g_strstr_len (mount_path, -1, "/.") != NULL)
return FALSE;
/* Check /run/media/$USER/ */
user_name = g_get_user_name ();
user_name_len = strlen (user_name);
if (strncmp (mount_path, "/run/media/", sizeof ("/run/media/") - 1) == 0 &&
strncmp (mount_path + sizeof ("/run/media/") - 1, user_name, user_name_len) == 0 &&
mount_path[sizeof ("/run/media/") - 1 + user_name_len] == '/')
is_in_runtime_dir = TRUE;
if (is_in_runtime_dir || g_str_has_prefix (mount_path, "/media/"))
{
char *path;
/* Avoid displaying mounts that are not accessible to the user.
*
* See http://bugzilla.gnome.org/show_bug.cgi?id=526320 for why we
* want to avoid g_access() for mount points which can potentially
* block or fail stat()'ing, such as network mounts.
*/
path = g_path_get_dirname (mount_path);
if (g_str_has_prefix (path, "/media/"))
{
if (g_access (path, R_OK|X_OK) != 0)
{
g_free (path);
return FALSE;
}
}
g_free (path);
if (mount_entry->device_path && mount_entry->device_path[0] == '/')
{
struct stat st;
if (g_stat (mount_entry->device_path, &st) == 0 &&
S_ISBLK(st.st_mode) &&
g_access (mount_path, R_OK|X_OK) != 0)
return FALSE;
}
return TRUE;
}
if (g_str_has_prefix (mount_path, g_get_home_dir ()) &&
mount_path[strlen (g_get_home_dir())] == G_DIR_SEPARATOR)
return TRUE;
}
return FALSE;
}
/**
* g_unix_mount_point_guess_can_eject:
* @mount_point: a #GUnixMountPoint
*
* Guesses whether a Unix mount point can be ejected.
*
* Returns: %TRUE if @mount_point is deemed to be ejectable.
*/
gboolean
g_unix_mount_point_guess_can_eject (GUnixMountPoint *mount_point)
{
GUnixMountType guessed_type;
guessed_type = g_unix_mount_point_guess_type (mount_point);
if (guessed_type == G_UNIX_MOUNT_TYPE_IPOD ||
guessed_type == G_UNIX_MOUNT_TYPE_CDROM)
return TRUE;
return FALSE;
}
/* Utility functions {{{1 */
#ifdef HAVE_MNTENT_H
/* borrowed from gtk/gtkfilesystemunix.c in GTK+ on 02/23/2006 */
static void
_canonicalize_filename (gchar *filename)
{
gchar *p, *q;
gboolean last_was_slash = FALSE;
p = filename;
q = filename;
while (*p)
{
if (*p == G_DIR_SEPARATOR)
{
if (!last_was_slash)
*q++ = G_DIR_SEPARATOR;
last_was_slash = TRUE;
}
else
{
if (last_was_slash && *p == '.')
{
if (*(p + 1) == G_DIR_SEPARATOR ||
*(p + 1) == '\0')
{
if (*(p + 1) == '\0')
break;
p += 1;
}
else if (*(p + 1) == '.' &&
(*(p + 2) == G_DIR_SEPARATOR ||
*(p + 2) == '\0'))
{
if (q > filename + 1)
{
q--;
while (q > filename + 1 &&
*(q - 1) != G_DIR_SEPARATOR)
q--;
}
if (*(p + 2) == '\0')
break;
p += 2;
}
else
{
*q++ = *p;
last_was_slash = FALSE;
}
}
else
{
*q++ = *p;
last_was_slash = FALSE;
}
}
p++;
}
if (q > filename + 1 && *(q - 1) == G_DIR_SEPARATOR)
q--;
*q = '\0';
}
static char *
_resolve_symlink (const char *file)
{
GError *error;
char *dir;
char *link;
char *f;
char *f1;
f = g_strdup (file);
while (g_file_test (f, G_FILE_TEST_IS_SYMLINK))
{
link = g_file_read_link (f, &error);
if (link == NULL)
{
g_error_free (error);
g_free (f);
f = NULL;
goto out;
}
dir = g_path_get_dirname (f);
f1 = g_strdup_printf ("%s/%s", dir, link);
g_free (dir);
g_free (link);
g_free (f);
f = f1;
}
out:
if (f != NULL)
_canonicalize_filename (f);
return f;
}
static const char *
_resolve_dev_root (void)
{
static gboolean have_real_dev_root = FALSE;
static char real_dev_root[256];
struct stat statbuf;
/* see if it's cached already */
if (have_real_dev_root)
goto found;
/* otherwise we're going to find it right away.. */
have_real_dev_root = TRUE;
if (stat ("/dev/root", &statbuf) == 0)
{
if (! S_ISLNK (statbuf.st_mode))
{
dev_t root_dev = statbuf.st_dev;
FILE *f;
/* see if device with similar major:minor as /dev/root is mention
* in /etc/mtab (it usually is)
*/
f = fopen ("/etc/mtab", "r");
if (f != NULL)
{
struct mntent *entp;
#ifdef HAVE_GETMNTENT_R
struct mntent ent;
char buf[1024];
while ((entp = getmntent_r (f, &ent, buf, sizeof (buf))) != NULL)
{
#else
G_LOCK (getmntent);
while ((entp = getmntent (f)) != NULL)
{
#endif
if (stat (entp->mnt_fsname, &statbuf) == 0 &&
statbuf.st_dev == root_dev)
{
strncpy (real_dev_root, entp->mnt_fsname, sizeof (real_dev_root) - 1);
real_dev_root[sizeof (real_dev_root) - 1] = '\0';
fclose (f);
goto found;
}
}
endmntent (f);
#ifndef HAVE_GETMNTENT_R
G_UNLOCK (getmntent);
#endif
}
/* no, that didn't work.. next we could scan /dev ... but I digress.. */
}
else
{
char *resolved;
resolved = _resolve_symlink ("/dev/root");
if (resolved != NULL)
{
strncpy (real_dev_root, resolved, sizeof (real_dev_root) - 1);
real_dev_root[sizeof (real_dev_root) - 1] = '\0';
g_free (resolved);
goto found;
}
}
}
/* bah sucks.. */
strcpy (real_dev_root, "/dev/root");
found:
return real_dev_root;
}
#endif
/* Epilogue {{{1 */
/* vim:set foldmethod=marker: */
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