route-update.sh: support comments in gateway and table files

router/route-update.sh

@@ -68,29 +68,29 @@ read_group_config()
     gw="" ; table="" ; route_via=""
 
     if [ -f "$dir/gateway" ] ; then
-        read -r gw < "$dir/gateway"
+        gw=$(grep -v '^#' "$dir/gateway" | grep -m1 .)
     else
         echo "[$(basename "$dir")] No gateway file, skipping" >&2
         return 1
     fi
 
     if [ -f "$dir/table" ] ; then
-        read -r table < "$dir/table"
+        table=$(grep -v '^#' "$dir/table" | grep -m1 .)
     else
         echo "[$(basename "$dir")] No table file, skipping" >&2
         return 1
     fi
 
     # Build route suffix: single vs multipath
-    local gw_count=$(grep -c . "$dir/gateway")
+    local gw_count=$(grep -v '^#' "$dir/gateway" | grep -c .)
     if [ "$gw_count" -le 1 ] ; then
         route_via="via $gw table $table"
     else
         route_via="table $table"
-        while read -r g ; do
-            [ -n "$g" ] || continue
+        local g
+        for g in $(grep -v '^#' "$dir/gateway" | grep .) ; do
             route_via="$route_via nexthop via $g weight 1"
-        done < "$dir/gateway"
+        done
     fi
 }