fstab-util: don't eat up errors in fstab_is_mount_point()

That way the caller can decide what to do with failures, whether to consider
them or ignore them.

1 files changed, 9 insertions, 4 deletions

diff --git a/src/shared/fstab-util.c b/src/shared/fstab-util.c
index c3106f1ae9..5675b0beac 100644
--- a/src/shared/fstab-util.c
+++ b/src/shared/fstab-util.c
@@ -34,18 +34,23 @@
 #include "strv.h"
 #include "util.h"
 
-bool fstab_is_mount_point(const char *mount) {
+int fstab_is_mount_point(const char *mount) {
         _cleanup_endmntent_ FILE *f = NULL;
         struct mntent *m;
 
         f = setmntent("/etc/fstab", "re");
         if (!f)
-                return false;
+                return errno == ENOENT ? false : -errno;
+
+        for (;;) {
+                errno = 0;
+                m = getmntent(f);
+                if (!m)
+                        return errno != 0 ? -errno : false;
 
-        while ((m = getmntent(f)))
                 if (path_equal(m->mnt_dir, mount))
                         return true;
-
+        }
         return false;
 }