init.d script to start user's daemons on system boot

init.d

kenneth@KWF3:/etc/init.d$ ls
apparmor       hwclock-save                pppd-dns        stop-bootlogd
apt-cacher-ng  irqbalance                  procps          stop-bootlogd-single
atd            killprocs                   rc              tftpd-hpa
atop           lm-sensors                  rc.local        udev
bootlogd       mdadm                       rcS             udev-finish
console-setup  module-init-tools           README          udevmonitor
cron           networking                  reboot          udevtrigger
dbus           network-interface           rsync           ufw
dmesg          network-interface-security  rsyslog         umountfs
dns-clean      nmbd                        screen-cleanup  umountnfs.sh
failsafe-x     ondemand                    sendsigs        umountroot
fancontrol     plymouth                    single          urandom
grub-common    plymouth-log                skeleton        userstart
halt           plymouth-splash             smbd            vsftpd
hostname       plymouth-stop               squid3          x11-common
hwclock        postfix                     ssh

rc0.d

kenneth@KWF3:/etc/rc0.d$ ls
K20apt-cacher-ng  K20userstart  README       S31umountnfs.sh  S60umountroot
K20atop           K25mdadm      S20sendsigs  S35networking    S90halt
K20postfix        K30squid3     S30urandom   S40umountfs

rc2.d

kenneth@KWF3:/etc/rc2.d$ ls
README            S20fancontrol  S25mdadm   S70dns-clean    S99ondemand
S20apt-cacher-ng  S20postfix     S30squid3  S70pppd-dns     S99rc.local
S20atop           S20userstart   S50rsync   S99grub-common

userstart.sh

#! /bin/sh
### BEGIN INIT INFO
# Provides:          UserStart
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Starts user daemons from ~/cron/startup.sh
# Description:       Users are able to start any personal daemons they
#                    like by adding them to ~/cron/startup.sh
#                    
### END INIT INFO

# Author: Kenneth Finnegan <kennethfinnegan2007@gmail.com>
#

PATH=/sbin:/usr/sbin:/bin:/usr/bin
DESC="Run every user's ~/cron/startup.sh script"
NAME=userstart
SCRIPTNAME=/etc/init.d/$NAME

# Function that starts the daemon/service
#
do_start()
{
	# Return
	#   0 if daemon has been started
	#   1 if daemon was already running
	#   2 if daemon could not be started

	cat /etc/passwd |
	while read PASSWDLINE; do
		TARGETUSER="`echo $PASSWDLINE | awk -F ':' '{print $1}' `"
		TUSERHOME="`echo $PASSWDLINE | awk -F ':' '{print $6}' `"

		STARTSCRIPT="$TUSERHOME/cron/startup.sh"
		if [ -x $STARTSCRIPT ]; then
			cd $TUSERHOME
			su -l -c $STARTSCRIPT $TARGETUSER &
		fi
	done

	return 0
}

#
# Function that stops the daemon/service
#
do_stop()
{
	# An obvious extension would be to call ~/cron/shutdown.sh here...

	# Return
	#   0 if daemon has been stopped
	#   1 if daemon was already stopped
	#   2 if daemon could not be stopped
	#   other if a failure occurred
	return 0
}

#
# Function that sends a SIGHUP to the daemon/service
#
do_reload() {
	#
	# If the daemon can reload its configuration without
	# restarting (for example, when it is sent a SIGHUP),
	# then implement that here.
	#
	return 0
}

case "$1" in
  start)
	[ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC" "$NAME"
	do_start
	case "$?" in
		0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
		2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
	esac
	;;
  stop)
	[ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME"
	do_stop
	case "$?" in
		0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
		2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
	esac
	;;
  status)
       ;;
  #reload|force-reload)
	#
	# If do_reload() is not implemented then leave this commented out
	# and leave 'force-reload' as an alias for 'restart'.
	#
	#log_daemon_msg "Reloading $DESC" "$NAME"
	#do_reload
	#log_end_msg $?
	#;;
  restart|force-reload)
	#
	# If the "reload" option is implemented then remove the
	# 'force-reload' alias
	#
	do_stop
	case "$?" in
	  0|1)
		do_start
		case "$?" in
			0) log_end_msg 0 ;;
			1) log_end_msg 1 ;; # Old process is still running
			*) log_end_msg 1 ;; # Failed to start
		esac
		;;
	  *)
	  	# Failed to stop
		log_end_msg 1
		;;
	esac
	;;
  *)
	#echo "Usage: $SCRIPTNAME {start|stop|restart|reload|force-reload}" >&2
	echo "Usage: $SCRIPTNAME {start|stop|status|restart|force-reload}" >&2
	exit 3
	;;
esac

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