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gunixmounts: Allow root to display mounts under /run/media/$username

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Normally, the list of mounts is filtered to exclude mounts in
/run/media/$username where $username is not the current user. However,
root can access all the mounts under /run/media/, regardless of the
username — so there’s no point in filtering out those mounts.

In some cases, filtering them out is harmful. In the case of a system
service which uses GVolumeMonitor, for example, filtering them out means
the service cannot see automounted USB sticks belonging to user
sessions.

Signed-off-by: Philip Withnall <withnall@endlessm.com>

https://bugzilla.gnome.org/show_bug.cgi?id=793994
This commit is contained in:
Philip Withnall 2018-03-02 16:40:34 +00:00
parent 7c1f38b1c9
commit c672fcc0a8
1 changed files with 18 additions and 7 deletions
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25
gio/gunixmounts.c
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@ -2688,18 +2688,29 @@ g_unix_mount_guess_should_display (GUnixMountEntry *mount_entry)
mount_path = mount_entry->mount_path;
if (mount_path != NULL)
{
const gboolean running_as_root = (getuid () == 0);
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/$USER/ */
user_name = g_get_user_name ();
user_name_len = strlen (user_name);
if (strncmp (mount_path, "/run/media/", sizeof ("/run/media/") - 1) == 0 &&
strncmp (mount_path + sizeof ("/run/media/") - 1, user_name, user_name_len) == 0 &&
mount_path[sizeof ("/run/media/") - 1 + user_name_len] == '/')
is_in_runtime_dir = TRUE;
/* Check /run/media/$USER/. If running as root, display any mounts below
* /run/media/. */
if (running_as_root)
{
if (strncmp (mount_path, "/run/media/", strlen ("/run/media/")) == 0)
is_in_runtime_dir = TRUE;
}
else
{
user_name = g_get_user_name ();
user_name_len = strlen (user_name);
if (strncmp (mount_path, "/run/media/", strlen ("/run/media/")) == 0 &&
strncmp (mount_path + strlen ("/run/media/"), user_name, user_name_len) == 0 &&
mount_path[strlen ("/run/media/") + user_name_len] == '/')
is_in_runtime_dir = TRUE;
}
if (is_in_runtime_dir || g_str_has_prefix (mount_path, "/media/"))
{