[glib] gunixmounts: Fix /proc/self/mountinfo monitoring

[Ondrej Holy <oholy src gnome org>]

commit bd9e266e116cd39bb5c674eeb74eb55449793e7f
Author: Ondrej Holy <oholy redhat com>
Date:   Tue Sep 27 10:32:04 2016 +0200

    gunixmounts: Fix /proc/self/mountinfo monitoring
    
    /proc/self/mountinfo is used to monitor changes of mounts with libmount.
    However, GFileMonitor is used currently to monitor this file, which
    doesn't work and consequently "changed" signal is never emitted. Special
    monitoring needs to be used instead, same as it is used for /proc/mounts.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=662946

 gio/gunixmounts.c |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/gio/gunixmounts.c b/gio/gunixmounts.c
index f87ba5d..b5e066f 100644
--- a/gio/gunixmounts.c
+++ b/gio/gunixmounts.c
@@ -1637,17 +1637,17 @@ mount_monitor_start (void)
       const gchar *mtab_path;
 
       mtab_path = get_mtab_monitor_file ();
-      /* /proc/mounts monitoring is special - can't just use GFileMonitor.
+      /* Monitoring files in /proc/ is special - can't just use GFileMonitor.
        * See 'man proc' for more details.
        */
-      if (g_strcmp0 (mtab_path, "/proc/mounts") == 0)
+      if (g_str_has_prefix (mtab_path, "/proc/"))
         {
           GIOChannel *proc_mounts_channel;
           GError *error = NULL;
-          proc_mounts_channel = g_io_channel_new_file ("/proc/mounts", "r", &error);
+          proc_mounts_channel = g_io_channel_new_file (mtab_path, "r", &error);
           if (proc_mounts_channel == NULL)
             {
-              g_warning ("Error creating IO channel for /proc/mounts: %s (%s, %d)",
+              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);
             }