Only accept numbers from .publish.ttl files

1 files changed, 8 insertions, 1 deletions

diff --git a/publish-purge b/publish-purge
index ea65755..0be0fd7 100755
--- a/publish-purge
+++ b/publish-purge
@@ -57,7 +57,14 @@ cleanit()
     d=$(readlink -f -- "$d")
 
     if [ -e "$d/.publish.ttl" ]; then
-       ttl="$(cat "$d/.publish.ttl")"
+        local newttl
+        newttl="$(cat "$d/.publish.ttl")"
+        if [ "$newttl" -eq "$newttl" ] 2>/dev/null; then
+            # if it is a number
+            ttl="$newttl"
+        else
+            [ "$optVerbose" -ge "1" ] && echo "Ignoring invalid TTL setting '$newttl' in $d"
+        fi
     fi
 
     if test_if_ancient "$d" "$ttl"; then