test

vhclient/rootfs/usr/bin/vh_editini

@@ -3,4 +3,10 @@
 file="/config/vhclient.ini"
 touch $file
 
-awk -f /usr/bin/vh_editini.awk -v section=$1 -v key=$2 -v value=$3 $file
+if [ -z "${3:-}" ]; then
+  v = ''
+else
+  v = $3
+fi
+
+awk -f /usr/bin/vh_editini.awk -v section=$1 -v key=$2 -v value=$v $file

vhclient/rootfs/usr/bin/vh_editini.awk

@@ -10,7 +10,7 @@ $0 ~ "^" key "=" {
   if (found_section) {
     found_key = 1;
     edited_row = 1;
-    if (value) {
+    if (value || value == 0) {
       print key "=" value;
     }
   }
@@ -19,8 +19,7 @@ $0 ~ "^" key "=" {
 $0 ~ "^\\[" {
   if (found_section && !found_key) {
     found_key = 1;
-    edited_row = 1;
-    if (value) {
+    if (value || value == 0) {
       print key "=" value;
     }
   }