From 290ccc540b669bbede1bb4acc14220401e6cb49b Mon Sep 17 00:00:00 2001
From: Jamie McClelland <jm@mayfirst.org>
Date: Fri, 9 Oct 2009 12:05:12 -0400
Subject: adding usage and check for valid command.

---
 kvm-creator | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

(limited to 'kvm-creator')

diff --git a/kvm-creator b/kvm-creator
index 763b6b9..b726e9a 100755
--- a/kvm-creator
+++ b/kvm-creator
@@ -24,6 +24,12 @@ else
   MAC=00:00:00:00:00:00
 fi
 
+usage() {
+
+	die "USAGE: kvm-creator create|destroy|demo guestname [volumegroup [disksize [ram [tap [mac] ] ] ] ]"
+
+}
+
 die() {
 
   echo "$1"
@@ -47,7 +53,7 @@ validate() {
 
   # Make sure none of the pieces already exist.
   [ -z "$NAME" ] && die "Please pass the name of the virtual server to create"
-  [ -z "$VG" ] && die "Please pass the name of the volume group to use"
+  [ -z "$VG" ] && [ "$CMD" == "create" ] && die "Please pass the name of the volume group to use"
   getent passwd "$NAME" > /dev/null
   [ "$?" -eq "0" ] && die "The username '$NAME' already exists."
   getent group "$NAME" > /dev/null
@@ -108,4 +114,6 @@ demo() {
 
 }
 
+[ "$CMD" != "create" ] && [ "$CMD" != "destroy" ] && [ "$CMD" != "demo" ] && usage
+
 "$CMD"
-- 
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