Handle default value for get_iface_from_mac

2019-05-18 10:42:13 +02:00 · 2019-05-18 10:42:13 +02:00 · 902da9f837
commit 902da9f837
parent da162d7615
1 changed files with 3 additions and 1 deletions
--- a/init/functions
+++ b/init/functions
@ -131,7 +131,9 @@ umount_retry() {
 get_iface_from_mac() {
    local mac="$1"
    local iface
-    iface="$(ip -o link | grep -i "$mac" | awk '{print $2}' | cut -d ':' -f1)"
+    if [ "x$mac" != "x" ]; then
+        iface="$(ip -o link | grep -i "$mac" | awk '{print $2}' | cut -d ':' -f1)"
+    fi
    echo "$iface"
 }