autoshut.sh printhelp()

1 files changed, 20 insertions, 7 deletions

diff --git a/bin/autoshut.sh b/bin/autoshut.sh
index 8c677ee..8be2e56 100755
--- a/bin/autoshut.sh
+++ b/bin/autoshut.sh
@@ -2,18 +2,23 @@
 
 function idle {
 	prog="$1"
-	while pgrep "$prog" >/dev/null; do
+	while pgrep "$prog" >/dev/null 2>&1; do
 		sleep 3
 	done
 	shutdown -hP now
 }
 
-prog="irssi"
-daemon=false
+usage="Usage: $0 [-d] [-p PROCESS]"
+function printhelp {
+	echo "A small shellscript which shutdowns your computer when a specific process ends"
+	echo $usage
+	echo "-d		daemonize into the background"
+	echo "-p PROCESS	commit the process name for which we are waiting to finish"
+	exit
+}
 
-if [ $UID != 0 ]; then
-	read -p "We aren't root! Are you sure you have the proper permissions? If yes, press any key to continue or CTRL+C to abort. " null
-fi
+prog=""
+daemon=false
 
 while [ $# -gt 0 ]; do
 	if [ "$1" == "-p" ]; then
@@ -23,18 +28,26 @@ while [ $# -gt 0 ]; do
 	elif [ "$1" == "-d" ]; then
 		daemon=true
 		shift
+	elif [ "$1" == "-h" ] || [ "$1" == "--help" ]; then
+		printhelp
 	else
-		echo "Unsupported argument '$1'" 1>&2
+		echo "Unsupported argument '$1'. Try '-h' for more help." 1>&2
 		exit 1
 	fi
 done
 
 if [ -z "$prog" ] || [ "$prog" == "" ]; then
 	echo "I'm confused. Which programm shall I monitor? Tell me, master!" 1>&2
+	echo $usage
 	exit 1
 fi
 
+if [ $UID != 0 ]; then
+	read -p "We aren't root! Are you sure you have the proper permissions? If yes, press any key to continue or CTRL+C to abort. " null
+fi
+
 if [ $daemon == true ]; then
+	echo "Daemonizing..."
 	idle "$prog" >/dev/null 2>&1 &
 	disown
 else