[glib] Use libmount to find the path of the fstab file

[Mario Sanchez Prada <msanchez src gnome org>]

commit 8d5cf2df102117607f65714a9c49a579ebedaa9b
Author: Mario Sanchez Prada <mario endlessm com>
Date:   Tue Jul 19 11:51:55 2016 +0100

    Use libmount to find the path of the fstab file
    
    https://bugzilla.gnome.org/show_bug.cgi?id=522053

 gio/gunixmounts.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)
---
diff --git a/gio/gunixmounts.c b/gio/gunixmounts.c
index 1e0d6c5..fc53ed5 100644
--- a/gio/gunixmounts.c
+++ b/gio/gunixmounts.c
@@ -150,6 +150,9 @@ static guint64 mount_poller_time = 0;
 
 #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
@@ -728,6 +731,9 @@ _g_get_unix_mounts (void)
 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";
@@ -738,6 +744,7 @@ get_fstab_file (void)
 #else
   return "/etc/fstab";
 #endif
+#endif
 }
 
 /* mntent.h (Linux, GNU, NSS) {{{2 */