error handling

1 files changed, 6 insertions, 1 deletions

diff --git a/src/retain-snapshots b/src/retain-snapshots
index 9c44f05..c9d2cc6 100755
--- a/src/retain-snapshots
+++ b/src/retain-snapshots
@@ -35,7 +35,12 @@ main()
 is_readonly_subvolume()
 {
         [ -d "$1" ]
-        btrfs subvolume show -- "$1" | sed -En -e'/^\tFlags:.*\breadonly\b/{q0}' -e'${q1}'
+        if
+                ! 2>/dev/null btrfs subvolume show -- "$1" |
+                sed -En -e'/^\tFlags:.*\breadonly\b/{q0}' -e'${q1}'
+        then
+                return $?
+        fi
 }
 
 btrfs_subvolume_delete()