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udiskslinuxfilesystem.c
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udiskslinuxfilesystem.c
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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*-
*
* Copyright (C) 2007-2010 David Zeuthen <zeuthen@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include "config.h"
#include <glib/gi18n-lib.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <pwd.h>
#include <grp.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <mntent.h>
#include <sys/sysmacros.h>
#ifdef HAVE_ACL
#include <sys/acl.h>
#endif
#include <errno.h>
#include <blockdev/fs.h>
#include <blockdev/utils.h>
#include <libmount/libmount.h>
#include <glib/gstdio.h>
#include "udiskslogging.h"
#include "udiskslinuxfilesystem.h"
#include "udiskslinuxfilesystemhelpers.h"
#include "udiskslinuxblockobject.h"
#include "udiskslinuxblock.h"
#include "udiskslinuxfsinfo.h"
#include "udisksdaemon.h"
#include "udisksstate.h"
#include "udisksdaemonutil.h"
#include "udisksmountmonitor.h"
#include "udisksmount.h"
#include "udiskslinuxdevice.h"
#include "udiskssimplejob.h"
#include "udiskslinuxdriveata.h"
#include "udiskslinuxmountoptions.h"
/**
* SECTION:udiskslinuxfilesystem
* @title: UDisksLinuxFilesystem
* @short_description: Linux implementation of #UDisksFilesystem
*
* This type provides an implementation of the #UDisksFilesystem
* interface on Linux.
*/
typedef struct _UDisksLinuxFilesystemClass UDisksLinuxFilesystemClass;
/**
* UDisksLinuxFilesystem:
*
* The #UDisksLinuxFilesystem structure contains only private data and should
* only be accessed using the provided API.
*/
struct _UDisksLinuxFilesystem
{
UDisksFilesystemSkeleton parent_instance;
GMutex lock;
};
struct _UDisksLinuxFilesystemClass
{
UDisksFilesystemSkeletonClass parent_class;
};
static void filesystem_iface_init (UDisksFilesystemIface *iface);
G_DEFINE_TYPE_WITH_CODE (UDisksLinuxFilesystem, udisks_linux_filesystem, UDISKS_TYPE_FILESYSTEM_SKELETON,
G_IMPLEMENT_INTERFACE (UDISKS_TYPE_FILESYSTEM, filesystem_iface_init));
#ifdef HAVE_FHS_MEDIA
#define MOUNT_BASE "/media"
#define MOUNT_BASE_PERSISTENT TRUE
#else
#define MOUNT_BASE "/run/media"
#define MOUNT_BASE_PERSISTENT FALSE
#endif
/* ---------------------------------------------------------------------------------------------------- */
static void
udisks_linux_filesystem_finalize (GObject *object)
{
UDisksLinuxFilesystem *filesystem = UDISKS_LINUX_FILESYSTEM (object);
g_mutex_clear (&(filesystem->lock));
if (G_OBJECT_CLASS (udisks_linux_filesystem_parent_class)->finalize != NULL)
G_OBJECT_CLASS (udisks_linux_filesystem_parent_class)->finalize (object);
}
static void
udisks_linux_filesystem_init (UDisksLinuxFilesystem *filesystem)
{
g_mutex_init (&filesystem->lock);
g_dbus_interface_skeleton_set_flags (G_DBUS_INTERFACE_SKELETON (filesystem),
G_DBUS_INTERFACE_SKELETON_FLAGS_HANDLE_METHOD_INVOCATIONS_IN_THREAD);
}
static void
udisks_linux_filesystem_class_init (UDisksLinuxFilesystemClass *klass)
{
GObjectClass *gobject_class;
gobject_class = G_OBJECT_CLASS (klass);
gobject_class->finalize = udisks_linux_filesystem_finalize;
}
/**
* udisks_linux_filesystem_new:
*
* Creates a new #UDisksLinuxFilesystem instance.
*
* Returns: A new #UDisksLinuxFilesystem. Free with g_object_unref().
*/
UDisksFilesystem *
udisks_linux_filesystem_new (void)
{
return UDISKS_FILESYSTEM (g_object_new (UDISKS_TYPE_LINUX_FILESYSTEM,
NULL));
}
/* ---------------------------------------------------------------------------------------------------- */
static guint64
get_filesystem_size (UDisksLinuxBlockObject *object)
{
guint64 size = 0;
UDisksLinuxDevice *device;
gchar *dev;
const gchar *type;
GError *error = NULL;
device = udisks_linux_block_object_get_device (object);
dev = udisks_linux_block_object_get_device_file (object);
type = g_udev_device_get_property (device->udev_device, "ID_FS_TYPE");
if (g_strcmp0 (type, "ext2") == 0)
{
BDFSExt2Info *info = bd_fs_ext2_get_info (dev, &error);
if (info)
{
size = info->block_size * info->block_count;
bd_fs_ext2_info_free (info);
}
}
else if (g_strcmp0 (type, "ext3") == 0)
{
BDFSExt3Info *info = bd_fs_ext3_get_info (dev, &error);
if (info)
{
size = info->block_size * info->block_count;
bd_fs_ext3_info_free (info);
}
}
else if (g_strcmp0 (type, "ext4") == 0)
{
BDFSExt4Info *info = bd_fs_ext4_get_info (dev, &error);
if (info)
{
size = info->block_size * info->block_count;
bd_fs_ext4_info_free (info);
}
}
else if (g_strcmp0 (type, "xfs") == 0)
{
BDFSXfsInfo *info = bd_fs_xfs_get_info (dev, &error);
if (info)
{
size = info->block_size * info->block_count;
bd_fs_xfs_info_free (info);
}
}
g_free (dev);
g_object_unref (device);
g_clear_error (&error);
return size;
}
static UDisksDriveAta *
get_drive_ata (UDisksLinuxBlockObject *object)
{
UDisksObject *drive_object = NULL;
UDisksDriveAta *ata = NULL;
UDisksBlock *block;
block = udisks_object_peek_block (UDISKS_OBJECT (object));
if (block == NULL)
return NULL;
drive_object = udisks_daemon_find_object (udisks_linux_block_object_get_daemon (object), udisks_block_get_drive (block));
if (drive_object == NULL)
return NULL;
ata = udisks_object_get_drive_ata (drive_object);
g_object_unref (drive_object);
return ata;
}
/**
* udisks_linux_filesystem_update:
* @filesystem: A #UDisksLinuxFilesystem.
* @object: The enclosing #UDisksLinuxBlockObject instance.
*
* Updates the interface.
*/
void
udisks_linux_filesystem_update (UDisksLinuxFilesystem *filesystem,
UDisksLinuxBlockObject *object)
{
UDisksMountMonitor *mount_monitor;
UDisksLinuxDevice *device;
UDisksDriveAta *ata = NULL;
GPtrArray *p;
GList *mounts;
GList *l;
gboolean skip_fs_size = FALSE;
guchar pm_state;
mount_monitor = udisks_daemon_get_mount_monitor (udisks_linux_block_object_get_daemon (object));
device = udisks_linux_block_object_get_device (object);
p = g_ptr_array_new ();
mounts = udisks_mount_monitor_get_mounts_for_dev (mount_monitor, g_udev_device_get_device_number (device->udev_device));
/* we are guaranteed that the list is sorted so if there are
* multiple mounts we'll always get the same order
*/
for (l = mounts; l != NULL; l = l->next)
{
UDisksMount *mount = UDISKS_MOUNT (l->data);
if (udisks_mount_get_mount_type (mount) == UDISKS_MOUNT_TYPE_FILESYSTEM)
g_ptr_array_add (p, (gpointer) udisks_mount_get_mount_path (mount));
}
g_ptr_array_add (p, NULL);
udisks_filesystem_set_mount_points (UDISKS_FILESYSTEM (filesystem),
(const gchar *const *) p->pdata);
g_ptr_array_free (p, TRUE);
g_list_free_full (mounts, g_object_unref);
/* if the drive is ATA and is sleeping, skip filesystem size check to prevent
* drive waking up - nothing has changed anyway since it's been sleeping...
*/
ata = get_drive_ata (object);
if (ata != NULL)
{
if (udisks_linux_drive_ata_get_pm_state (UDISKS_LINUX_DRIVE_ATA (ata), NULL, &pm_state))
skip_fs_size = ! UDISKS_LINUX_DRIVE_ATA_IS_AWAKE (pm_state);
}
g_clear_object (&ata);
if (! skip_fs_size)
udisks_filesystem_set_size (UDISKS_FILESYSTEM (filesystem), get_filesystem_size (object));
g_dbus_interface_skeleton_flush (G_DBUS_INTERFACE_SKELETON (filesystem));
g_object_unref (device);
}
/* ---------------------------------------------------------------------------------------------------- */
static const gchar *well_known_filesystems[] =
{
"btrfs",
"ext2",
"ext3",
"ext4",
"udf",
"iso9660",
"xfs",
"jfs",
"nilfs",
"reiserfs",
"reiser4",
"msdos",
"umsdos",
"vfat",
"exfat",
"ntfs",
NULL,
};
static gboolean
is_in_filesystem_file (const gchar *filesystems_file,
const gchar *fstype)
{
gchar *filesystems = NULL;
GError *error = NULL;
gboolean ret = FALSE;
gchar **lines = NULL;
guint n;
if (!g_file_get_contents (filesystems_file,
&filesystems,
NULL, /* gsize *out_length */
&error))
{
udisks_warning ("Error reading %s: %s (%s %d)",
filesystems_file,
error->message,
g_quark_to_string (error->domain),
error->code);
g_clear_error (&error);
goto out;
}
lines = g_strsplit (filesystems, "\n", -1);
for (n = 0; lines != NULL && lines[n] != NULL && !ret; n++)
{
gchar **tokens;
gint num_tokens;
g_strdelimit (lines[n], " \t", ' ');
g_strstrip (lines[n]);
tokens = g_strsplit (lines[n], " ", -1);
num_tokens = g_strv_length (tokens);
if (num_tokens == 1 && g_strcmp0 (tokens[0], fstype) == 0)
{
ret = TRUE;
}
g_strfreev (tokens);
}
out:
g_strfreev (lines);
g_free (filesystems);
return ret;
}
static gboolean
is_well_known_filesystem (const gchar *fstype)
{
gboolean ret = FALSE;
guint n;
for (n = 0; well_known_filesystems[n] != NULL; n++)
{
if (g_strcmp0 (well_known_filesystems[n], fstype) == 0)
{
ret = TRUE;
goto out;
}
}
out:
return ret;
}
/* this is not a very efficient implementation but it's very rarely
* called so no real point in optimizing it...
*/
static gboolean
is_allowed_filesystem (const gchar *fstype)
{
return is_well_known_filesystem (fstype) ||
is_in_filesystem_file ("/proc/filesystems", fstype) ||
is_in_filesystem_file ("/etc/filesystems", fstype);
}
/* ---------------------------------------------------------------------------------------------------- */
/*
* calculate_fs_type: <internal>
* @block: A #UDisksBlock.
* @given_options: The a{sv} #GVariant.
* @error: Return location for error or %NULL.
*
* Calculates the file system type to use.
*
* Returns: A valid UTF-8 string with the filesystem type (may be "auto") or %NULL if @error is set. Free with g_free().
*/
static gchar *
calculate_fs_type (UDisksBlock *block,
GVariant *given_options,
GError **error)
{
gchar *fs_type_to_use = NULL;
const gchar *probed_fs_type = NULL;
const gchar *requested_fs_type;
probed_fs_type = NULL;
if (block != NULL)
probed_fs_type = udisks_block_get_id_type (block);
if (g_variant_lookup (given_options,
"fstype",
"&s", &requested_fs_type) &&
strlen (requested_fs_type) > 0)
{
/* If the user requests the filesystem type, error out unless the
* filesystem type is
*
* - well-known [1]; or
* - in the /proc/filesystems file; or
* - in the /etc/filesystems file
*
* in that order. We do this because mount(8) on Linux allows
* loading any arbitrary kernel module (when invoked as root) by
* passing something appropriate to the -t option. So we have to
* validate whatever we pass...
*
* See https://bugs.freedesktop.org/show_bug.cgi?id=32232 for more
* details.
*
* [1] : since /etc/filesystems may be horribly out of date and
* not contain e.g. ext4
*/
if (g_strcmp0 (requested_fs_type, "auto") != 0)
{
if (!is_allowed_filesystem (requested_fs_type))
{
g_set_error (error,
UDISKS_ERROR,
UDISKS_ERROR_OPTION_NOT_PERMITTED,
"Requested filesystem type `%s' is neither well-known nor "
"in /proc/filesystems nor in /etc/filesystems",
requested_fs_type);
goto out;
}
}
/* TODO: maybe check that it's compatible with probed_fs_type */
fs_type_to_use = g_strdup (requested_fs_type);
}
else
{
if (probed_fs_type != NULL && strlen (probed_fs_type) > 0)
fs_type_to_use = g_strdup (probed_fs_type);
else
fs_type_to_use = g_strdup ("auto");
}
out:
g_assert (fs_type_to_use == NULL || g_utf8_validate (fs_type_to_use, -1, NULL));
return fs_type_to_use;
}
/* ---------------------------------------------------------------------------------------------------- */
static gchar *
ensure_utf8 (const gchar *s)
{
const gchar *end;
gchar *ret;
if (!g_utf8_validate (s, -1, &end))
{
gchar *tmp;
gint pos;
/* TODO: could possibly return a nicer UTF-8 string */
pos = (gint) (end - s);
tmp = g_strndup (s, end - s);
ret = g_strdup_printf ("%s (Invalid UTF-8 at byte %d)", tmp, pos);
g_free (tmp);
}
else
{
ret = g_strdup (s);
}
return ret;
}
/* ---------------------------------------------------------------------------------------------------- */
#ifdef HAVE_ACL
static gboolean
add_acl (const gchar *path,
uid_t uid,
GError **error)
{
gboolean ret = FALSE;
acl_t acl = NULL;
acl_entry_t entry;
acl_permset_t permset;
acl = acl_get_file(path, ACL_TYPE_ACCESS);
if (acl == NULL ||
acl_create_entry (&acl, &entry) == -1 ||
acl_set_tag_type (entry, ACL_USER) == -1 ||
acl_set_qualifier (entry, &uid) == -1 ||
acl_get_permset (entry, &permset) == -1 ||
acl_add_perm (permset, ACL_READ|ACL_EXECUTE) == -1 ||
acl_calc_mask (&acl) == -1 ||
acl_set_file (path, ACL_TYPE_ACCESS, acl) == -1)
{
udisks_warning(
"Adding read ACL for uid %d to `%s' failed: %m",
(gint) uid, path);
chown(path, uid, -1);
}
ret = TRUE;
if (acl != NULL)
acl_free (acl);
return ret;
}
#endif
/*
* calculate_mount_point: <internal>
* @daemon: A #UDisksDaemon.
* @block: A #UDisksBlock.
* @uid: user id of the calling user
* @gid: group id of the calling user
* @user_name: user name of the calling user
* @fs_type: The file system type to mount with
* @persistent: if the mount point is persistent (survives reboot) or not
* @error: Return location for error or %NULL.
*
* Calculates the mount point to use.
*
* Returns: A UTF-8 string with the mount point to use or %NULL if @error is set. Free with g_free().
*/
static gchar *
calculate_mount_point (UDisksDaemon *daemon,
UDisksBlock *block,
uid_t uid,
gid_t gid,
const gchar *user_name,
const gchar *fs_type,
gboolean *persistent,
GError **error)
{
UDisksLinuxBlockObject *object = NULL;
gboolean fs_shared = FALSE;
const gchar *label = NULL;
const gchar *uuid = NULL;
gchar *escaped_user_name = NULL;
gchar *mount_dir = NULL;
gchar *mount_point = NULL;
gchar *orig_mount_point;
GString *str;
gchar *s;
guint n;
label = NULL;
uuid = NULL;
if (block != NULL)
{
label = udisks_block_get_id_label (block);
uuid = udisks_block_get_id_uuid (block);
}
object = udisks_daemon_util_dup_object (block, NULL);
if (object != NULL)
{
UDisksLinuxDevice *device = udisks_linux_block_object_get_device (object);
if (device != NULL)
{
if (device->udev_device != NULL)
{
/* TODO: maybe introduce Block:HintFilesystemShared instead of pulling it directly from the udev device */
fs_shared = g_udev_device_get_property_as_boolean (device->udev_device, "UDISKS_FILESYSTEM_SHARED");
}
g_object_unref (device);
}
}
/* If we know the user-name and it doesn't have any '/' character in
* it, mount in MOUNT_BASE/$USER
*/
if (!fs_shared && (user_name != NULL && strstr (user_name, "/") == NULL))
{
mount_dir = g_strdup_printf (MOUNT_BASE "/%s", user_name);
*persistent = MOUNT_BASE_PERSISTENT;
if (!g_file_test (mount_dir, G_FILE_TEST_EXISTS))
{
/* First ensure that MOUNT_BASE exists */
if (g_mkdir (MOUNT_BASE, 0755) != 0 && errno != EEXIST)
{
g_set_error (error,
UDISKS_ERROR,
UDISKS_ERROR_FAILED,
"Error creating directory " MOUNT_BASE ": %m");
goto out;
}
/* Then create the per-user MOUNT_BASE/$USER */
#ifdef HAVE_ACL
if (g_mkdir (mount_dir, 0700) != 0 && errno != EEXIST)
#else
if (g_mkdir (mount_dir, 0750) != 0 && errno != EEXIST)
#endif
{
g_set_error (error,
UDISKS_ERROR,
UDISKS_ERROR_FAILED,
"Error creating directory `%s': %m",
mount_dir);
goto out;
}
/* Finally, add the read+execute ACL for $USER */
#ifdef HAVE_ACL
if (!add_acl (mount_dir, uid, error))
{
#else
if (chown (mount_dir, -1, gid) == -1)
{
g_set_error (error, G_IO_ERROR,
g_io_error_from_errno (errno),
"Failed to change gid to %d for %s: %m",
(gint) gid, mount_dir);
#endif
if (rmdir (mount_dir) != 0)
udisks_warning ("Error calling rmdir() on %s: %m", mount_dir);
goto out;
}
}
}
/* otherwise fall back to mounting in /media */
if (mount_dir == NULL)
{
mount_dir = g_strdup ("/media");
*persistent = TRUE;
}
/* NOTE: UTF-8 has the nice property that valid UTF-8 strings only contains
* the byte 0x2F if it's for the '/' character (U+002F SOLIDUS).
*
* See http://en.wikipedia.org/wiki/UTF-8 for details.
*/
if (label != NULL && strlen (label) > 0)
{
str = g_string_new (NULL);
g_string_append_printf (str, "%s/", mount_dir);
s = ensure_utf8 (label);
for (n = 0; s[n] != '\0'; n++)
{
gint c = s[n];
if (c == '/')
g_string_append_c (str, '_');
else
g_string_append_c (str, c);
}
mount_point = g_string_free (str, FALSE);
g_free (s);
}
else if (uuid != NULL && strlen (uuid) > 0)
{
str = g_string_new (NULL);
g_string_append_printf (str, "%s/", mount_dir);
s = ensure_utf8 (uuid);
for (n = 0; s[n] != '\0'; n++)
{
gint c = s[n];
if (c == '/')
g_string_append_c (str, '_');
else
g_string_append_c (str, c);
}
mount_point = g_string_free (str, FALSE);
g_free (s);
}
else
{
mount_point = g_strdup_printf ("%s/disk", mount_dir);
}
/* ... then uniqify the mount point */
orig_mount_point = g_strdup (mount_point);
n = 1;
while (TRUE)
{
if (!g_file_test (mount_point, G_FILE_TEST_EXISTS))
{
break;
}
else
{
g_free (mount_point);
mount_point = g_strdup_printf ("%s%u", orig_mount_point, n++);
}
}
g_free (orig_mount_point);
out:
g_free (mount_dir);
g_clear_object (&object);
g_free (escaped_user_name);
return mount_point;
}
/* ---------------------------------------------------------------------------------------------------- */
static gboolean
has_option (const gchar *options,
const gchar *option)
{
gboolean ret = FALSE;
gchar **tokens;
guint n;
tokens = g_strsplit (options, ",", -1);
for (n = 0; tokens != NULL && tokens[n] != NULL; n++)
{
if (g_strcmp0 (tokens[n], option) == 0)
{
ret = TRUE;
goto out;
}
}
out:
g_strfreev (tokens);
return ret;
}
/* returns TRUE if, and only if, device is referenced in e.g. /etc/fstab
*/
static gboolean
is_system_managed (UDisksDaemon *daemon,
UDisksBlock *block,
gchar **out_mount_point,
gchar **out_mount_options)
{
UDisksMountMonitor *mount_monitor = udisks_daemon_get_mount_monitor (daemon);
gboolean ret = FALSE;
struct libmnt_table *table;
struct libmnt_iter* iter;
struct libmnt_fs *fs = NULL;
table = mnt_new_table ();
if (mnt_table_parse_fstab (table, NULL) < 0)
{
mnt_free_table (table);
return FALSE;
}
iter = mnt_new_iter (MNT_ITER_FORWARD);
while (mnt_table_next_fs (table, iter, &fs) == 0)
{
if (udisks_linux_block_matches_id (UDISKS_LINUX_BLOCK (block), mnt_fs_get_source (fs)))
{
/* If this block device is found in fstab, but something else is already
* mounted on that mount point, ignore the fstab entry.
*/
UDisksMount *mount = udisks_mount_monitor_get_mount_for_path (mount_monitor, mnt_fs_get_target (fs));
if (mount == NULL || udisks_block_get_device_number (block) == udisks_mount_get_dev (mount))
{
ret = TRUE;
if (out_mount_point != NULL)
*out_mount_point = g_strdup (mnt_fs_get_target (fs));
if (out_mount_options != NULL)
*out_mount_options = mnt_fs_strdup_options (fs);
}
g_clear_object (&mount);
if (ret)
break;
}
}
mnt_free_iter (iter);
mnt_free_table (table);
return ret;
}
/* ---------------------------------------------------------------------------------------------------- */
/* runs in thread dedicated to handling @invocation */
static gboolean
handle_mount (UDisksFilesystem *filesystem,
GDBusMethodInvocation *invocation,
GVariant *options)
{
UDisksObject *object = NULL;
UDisksBlock *block;
UDisksDaemon *daemon;
UDisksState *state = NULL;
uid_t caller_uid;
gid_t caller_gid;
const gchar * const *existing_mount_points;
const gchar *probed_fs_usage;
gchar *fs_type_to_use = NULL;
gchar *mount_options_to_use = NULL;
gchar *mount_point_to_use = NULL;
gboolean mpoint_persistent = TRUE;
gchar *fstab_mount_options = NULL;
gchar *caller_user_name = NULL;
GError *error = NULL;
const gchar *action_id = NULL;
const gchar *message = NULL;
gboolean system_managed = FALSE;
gboolean success = FALSE;
gchar *device = NULL;
UDisksBaseJob *job = NULL;
/* only allow a single call at a time */
g_mutex_lock (&UDISKS_LINUX_FILESYSTEM (filesystem)->lock);
object = udisks_daemon_util_dup_object (filesystem, &error);
if (object == NULL)
{
g_dbus_method_invocation_take_error (invocation, error);
goto out;
}
block = udisks_object_peek_block (object);
daemon = udisks_linux_block_object_get_daemon (UDISKS_LINUX_BLOCK_OBJECT (object));
state = udisks_daemon_get_state (daemon);
device = udisks_block_dup_device (block);
/* perform state cleanup to avoid duplicate entries for this block device */
udisks_linux_block_object_lock_for_cleanup (UDISKS_LINUX_BLOCK_OBJECT (object));
udisks_state_check_block (state, udisks_linux_block_object_get_device_number (UDISKS_LINUX_BLOCK_OBJECT (object)));
/* check if mount point is managed by e.g. /etc/fstab or similar */
if (is_system_managed (daemon, block, &mount_point_to_use, &fstab_mount_options))
{
system_managed = TRUE;
}
/* First, fail if the device is already mounted */
existing_mount_points = udisks_filesystem_get_mount_points (filesystem);
if (existing_mount_points != NULL && g_strv_length ((gchar **) existing_mount_points) > 0)
{
GString *str;
guint n;
str = g_string_new (NULL);
for (n = 0; existing_mount_points[n] != NULL; n++)
{
if (n > 0)
g_string_append (str, ", ");
g_string_append_printf (str, "`%s'", existing_mount_points[n]);
}
g_dbus_method_invocation_return_error (invocation,
UDISKS_ERROR,
UDISKS_ERROR_ALREADY_MOUNTED,
"Device %s is already mounted at %s.\n",
device,
str->str);
g_string_free (str, TRUE);
goto out;
}
if (!udisks_daemon_util_get_caller_uid_sync (daemon,
invocation,
NULL /* GCancellable */,
&caller_uid,
&error))
{
g_dbus_method_invocation_return_gerror (invocation, error);
g_clear_error (&error);
goto out;
}
if (!udisks_daemon_util_get_user_info (caller_uid, &caller_gid, &caller_user_name, &error))
{
g_dbus_method_invocation_return_gerror (invocation, error);
g_clear_error (&error);
goto out;
}
if (system_managed)
{
gboolean mount_fstab_as_root = FALSE;
if (!has_option (fstab_mount_options, "x-udisks-auth") &&
!has_option (fstab_mount_options, "user") &&
!has_option (fstab_mount_options, "users"))
{
action_id = "org.freedesktop.udisks2.filesystem-mount";
/* Translators: Shown in authentication dialog when the user
* requests mounting a filesystem.
*
* Do not translate $(drive), it's a placeholder and
* will be replaced by the name of the drive/device in question
*/
message = N_("Authentication is required to mount $(drive)");
if (!udisks_daemon_util_setup_by_user (daemon, object, caller_uid))
{
if (udisks_block_get_hint_system (block))
{
action_id = "org.freedesktop.udisks2.filesystem-mount-system";
}
else if (!udisks_daemon_util_on_user_seat (daemon, object, caller_uid))
{
action_id = "org.freedesktop.udisks2.filesystem-mount-other-seat";
}
}
if (!udisks_daemon_util_check_authorization_sync (daemon,
object,
action_id,
options,
message,
invocation))
goto out;
mount_fstab_as_root = TRUE;
}
if (!g_file_test (mount_point_to_use, G_FILE_TEST_IS_DIR))
{
if (g_mkdir_with_parents (mount_point_to_use, 0755) != 0)
{
g_dbus_method_invocation_return_error (invocation,
UDISKS_ERROR,
UDISKS_ERROR_FAILED,
"Error creating directory `%s' to be used for mounting %s: %m",
mount_point_to_use,
device);
goto out;
}
}
mount_fstab_again:
job = udisks_daemon_launch_simple_job (daemon,
UDISKS_OBJECT (object),
"filesystem-mount",
mount_fstab_as_root ? 0 : caller_uid,
NULL /* cancellable */);
/* XXX: using run_as_uid for root doesn't work even if the caller is already root */
if (!mount_fstab_as_root && caller_uid != 0)
{
BDExtraArg uid_arg = {g_strdup ("run_as_uid"), g_strdup_printf("%d", caller_uid)};
BDExtraArg gid_arg = {g_strdup ("run_as_gid"), g_strdup_printf("%d", caller_gid)};
const BDExtraArg *extra_args[3] = {&uid_arg, &gid_arg, NULL};
success = bd_fs_mount (NULL, mount_point_to_use, NULL, NULL, extra_args, &error);
g_free (uid_arg.opt);
g_free (uid_arg.val);
g_free (gid_arg.opt);
g_free (gid_arg.val);
}
else
{
success = bd_fs_mount (NULL, mount_point_to_use, NULL, NULL, NULL, &error);
}
if (!success)
udisks_simple_job_complete (UDISKS_SIMPLE_JOB (job), FALSE, error->message);
else
udisks_simple_job_complete (UDISKS_SIMPLE_JOB (job), TRUE, NULL);
if (!success)
{
if (!mount_fstab_as_root && g_error_matches (error, BD_FS_ERROR, BD_FS_ERROR_AUTH))
{
g_clear_error (&error);
if (!udisks_daemon_util_check_authorization_sync (daemon,
object,
"org.freedesktop.udisks2.filesystem-fstab",
options,
/* Translators: Shown in authentication dialog when the
* user requests mounting a filesystem that is in
* /etc/fstab file with the x-udisks-auth option.
*
* Do not translate $(drive), it's a
* placeholder and will be replaced by the name of
* the drive/device in question
*
* Do not translate /etc/fstab
*/
N_("Authentication is required to mount $(drive) referenced in the /etc/fstab file"),
invocation))
goto out;
mount_fstab_as_root = TRUE;
goto mount_fstab_again;
}
g_dbus_method_invocation_return_error (invocation,
UDISKS_ERROR,
UDISKS_ERROR_FAILED,
"Error mounting system-managed device %s: %s",
device,
error->message);
g_clear_error (&error);
goto out;
}
udisks_notice ("Mounted %s (system) at %s on behalf of uid %u",
device,
mount_point_to_use,