Don't call /bin/[u]mount if /etc/mtab is a symlink

1 files changed, 17 insertions, 0 deletions

diff --git a/lib/mount_util.c b/lib/mount_util.c
index dccecdf..55b5f4e 100644
--- a/lib/mount_util.c
+++ b/lib/mount_util.c
@@ -14,15 +14,29 @@
 #include <dirent.h>
 #include <errno.h>
 #include <limits.h>
+#include <mntent.h>
 #include <sys/stat.h>
 #include <sys/wait.h>
 
+static int mtab_is_symlink(void)
+{
+    struct stat stbuf;
+
+    if (lstat(_PATH_MOUNTED, &stbuf) != -1 && S_ISLNK(stbuf.st_mode))
+        return 1;
+    else
+        return 0;
+}
+
 int fuse_mnt_add_mount(const char *progname, const char *fsname,
                        const char *mnt, const char *type, const char *opts)
 {
     int res;
     int status;
 
+    if (mtab_is_symlink())
+        return 0;
+
     res = fork();
     if (res == -1) {
         fprintf(stderr, "%s: fork: %s\n", progname, strerror(errno));
@@ -72,6 +86,9 @@ int fuse_mnt_umount(const char *progname, const char *mnt, int lazy)
     int res;
     int status;
 
+    if (mtab_is_symlink())
+        return 0;
+
     res = fork();
     if (res == -1) {
         fprintf(stderr, "%s: fork: %s\n", progname, strerror(errno));