From: Alexander Barton <alex@barton.de>
Date: Mon, 1 Sep 2014 22:28:30 +0000 (+0200)
Subject: Add command line parser and --help option
X-Git-Url: https://arthur.barton.de/gitweb/?p=trigger-rcmd.git;a=commitdiff_plain;h=a428c0a085067cb20c9ba6d96ff16b1f54efd442

Add command line parser and --help option
---

diff --git a/scripts/trigger-rcmd b/scripts/trigger-rcmd
index 89f61f1..7db861f 100755
--- a/scripts/trigger-rcmd
+++ b/scripts/trigger-rcmd
@@ -15,6 +15,11 @@ RCMD_D="/usr/local/etc/rcmd.d"
 
 PATH="$PATH:/usr/local/sbin:/usr/sbin"
 
+do_help() {
+	echo "Usage: $0 <rcmd> [<rcmd> [...]]" >&2
+	exit 2
+}
+
 do_rcmd() {
 	SYSTEM="localhost"
 	IFACE="eth0"
@@ -87,10 +92,17 @@ do_rcmd() {
 	[ $r -eq 0 ] && return 0 || return 1
 }
 
-if [ $# -lt 1 ]; then
-	echo "Usage: $0 <rcmd> [<rcms> [...]]" >&2
-	exit 2
-fi
+while [ $# -gt 0 ]; do
+	case "$1" in
+	  --help|-*)
+		do_help; ;;
+	  *)
+		break
+	esac
+	shift
+done
+
+[ $# -gt 0 ] || do_help
 
 result=0
 while [ $# -gt 0 ]; do