#!/bin/bash
#
# off/respawn
#
# dentar@dentar.com
#
# this is FREE software.  hell, it's just a damn script.
#
# This program disables/enables entries in the inittab by replacing off with
# respawn or respawn with off and issuing init q
#
# This script is meant to be put in /sbin, chmodded to 700 root:root 
# and then linked to as follows:
#
# call the script /sbin/off or /sbin/disable
#
# link to it as /sbin/on, /sbin/enable, or /sbin/respawn
#
# if you wish to call it something else, be sure to change the item
# names in the case statement below as we are evaluating $0 to find out if we
# are to enable or disable.
#

VERSION=0.09

if echo $* | grep -q showlabel
then
	grep -e ":off:" -e ":respawn:" /etc/inittab \
		| grep -v "^\#"
	exit 0
fi

if echo $* | grep -q usage
then
	echo
	echo respawn/off v$VERSION
	echo
	echo
	echo respawn/off changes values in the /etc/inittab to respawn or off
	echo then issues an init q to start or stop that entry.
	echo
	echo this program will not work with inittab entries that have been
	echo commented out.
	echo
	echo off showlabel
	echo respawn showlabel
	echo
	echo "	shows the labels in the inittab file and their values"
	echo
	echo off usage
	echo respawn usage
	echo
	echo "	shows this screen"
	echo
	echo off label1 label2 label3...
	echo respawn label1 label2 label3...
	echo 
	exit 0
fi

for LABEL in $*
do
	if grep -q "^$LABEL:" /etc/inittab
	then
		case `basename $0` in
			enable|respawn|on)
				if grep "^$LABEL:" /etc/inittab | grep -q ":respawn:"
				then
					echo "Label $LABEL is already enabled."
				else
					cat /etc/inittab \
						| sed -e '/^'$LABEL':/s/:off:/:respawn:/' \
						> /etc/inittab.tmp
					cp /etc/inittab.tmp /etc/inittab
					init q
					echo $LABEL enabled.
				fi
				;;
			disable|off)
				if grep "^$LABEL:" /etc/inittab | grep -q ":off:"
				then
					echo "Label $LABEL is already disabled."
				else
					cat /etc/inittab \
						| sed -e '/^'$LABEL':/s/:respawn:/:off:/' \
						> /etc/inittab.tmp
					cp /etc/inittab.tmp /etc/inittab
					init q
					echo $LABEL disabled.
				fi
				;;
		esac
	else
		echo $LABEL not found.  $0 showlabels to see the available labels.
	fi
done