Add and use showhelp function.

1 files changed, 13 insertions, 3 deletions

diff --git a/localcowbuilder-update b/localcowbuilder-update
index 6831473..b3cedcb 100755
--- a/localcowbuilder-update
+++ b/localcowbuilder-update
@@ -1,9 +1,19 @@
 #!/bin/sh
 
+set -e
+
+PRG=$(basename "$0")
+
+function showhelp() {
+	cat <<EOF
+Usage:   $(basename $0) POOL
+
+Example: $(basename $0) sarge_with_hacks
+EOF
+}
+
 if [ $# -eq 0 ]; then
-	echo "Usage:   $(basename $0) POOL"
-	echo ""
-	echo "Example: $(basename $0) sarge_with_hacks"
+	showhelp
 	exit 1
 fi