Allow gateway to be specified, or calculate it with ipcalc

diff --git a/vinst b/vinst
index 9a8eb90769e8dc72a1286b87d9a3248313b8b1f4..66b70aa087442fa7e2ee48c5f112e964f77bcdb7 100755 (executable)
--- a/vinst
+++ b/vinst
@@ -35,6 +35,14 @@ while [ -n "$1" ]; do
       esac
       IPADDRESS="$1"
       ;;
+    (-g|--gateway)
+      shift
+      if [ -z "$1" ]; then
+        echo >&2 'E: --gateway/-g needs IP address'
+        exit 1
+      fi
+      GATEWAY="$1"
+      ;;
     (-r|--ram)
       shift
       if [ -z "$1" ]; then
@@ -70,7 +78,7 @@ hostname=${HOSTNAME%%.*} \
 domain=${HOSTNAME#*.}"
 
 if [ -n "$IPADDRESS" ]; then
-  if [ -z "$GATEWAY" ]; then
+  if [ -z "$GATEWAY" ] && [ -x $(command -v ipcalc) ]; then
     # default to the first IP in the network
     GATEWAY=$(ipcalc $IPADDRESS | grep HostMin | awk '{print $2}')
   fi