[monitoring-plugins] avoid mounting when searching for matching mount ...

[Stefan Taferner]

 Module: monitoring-plugins
 Branch: master
 Commit: 0dd11100aa92bab172293ec9615a8a56b0e35ee6
 Author: Stefan Taferner <stefan.taferner at porscheinformatik.com>
   Date: Wed May 10 19:28:05 2023 +0200
    URL: https://www.monitoring-plugins.org/repositories/monitoring-plugins/commit/?id=0dd1110

avoid mounting when searching for matching mount points

---

 lib/utils_disk.c | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/lib/utils_disk.c b/lib/utils_disk.c
index 468769b..582d3ea 100644
--- a/lib/utils_disk.c
+++ b/lib/utils_disk.c
@@ -147,24 +147,25 @@ np_set_best_match(struct parameter_list *desired, struct mount_entry *mount_list
 
       /* set best match if path name exactly matches a mounted device name */
       for (me = mount_list; me; me = me->me_next) {
-	if (get_fs_usage(me->me_mountdir, me->me_devname, &fsp) < 0)
-	  continue; /* skip if permissions do not suffice for accessing device */
-        if (strcmp(me->me_devname, d->name)==0)
-          best_match = me;
+        if (strcmp(me->me_devname, d->name)==0) {
+          if (get_fs_usage(me->me_mountdir, me->me_devname, &fsp) >= 0) {
+            best_match = me;
+          }
+        }
       }
 
       /* set best match by directory name if no match was found by devname */
       if (! best_match) {
         for (me = mount_list; me; me = me->me_next) {
-	  if (get_fs_usage(me->me_mountdir, me->me_devname, &fsp) < 0)
-	    continue; /* skip if permissions do not suffice for accessing device */
           size_t len = strlen (me->me_mountdir);
           if ((exact == FALSE && (best_match_len <= len && len <= name_len &&
              (len == 1 || strncmp (me->me_mountdir, d->name, len) == 0)))
              || (exact == TRUE && strcmp(me->me_mountdir, d->name)==0))
           {
-            best_match = me;
-            best_match_len = len;
+            if (get_fs_usage(me->me_mountdir, me->me_devname, &fsp) >= 0) {
+              best_match = me;
+              best_match_len = len;
+            }
           }
         }
       }