backup: fail with 11 when not reachable by any ip version

1 files changed, 4 insertions, 0 deletions

diff --git a/backup.in b/backup.in
index 6e08d9e..cda64f8 100755
--- a/backup.in
+++ b/backup.in
@@ -136,6 +136,10 @@ elif [ "$#" -eq 4 ]; then
       | uniq -d \
       | tail -n1
   )
+  if [ -z ${ipVer} ]; then
+    >&2 echo 'not reachable'
+    exit 11
+  fi
   if [ ${ipVer} -eq 4 ]; then
     localAddress='127.0.0.1'
   elif [ ${ipVer} -eq 6 ]; then