Shammer's Philosophy

My private adversaria

Common Lisp UDP Server 自動起動スクリプト Ver.20121225

自動起動スクリプトの作成 - Shammerismで書いた自動起動スクリプト自作の/etc/init.d/XXXで起動したらbackgroundで動作しない - Shammerismで修正したが、さらにこのスクリプトを修正。pid ファイルの生成がうまく行っていなかったのと、停止時処理を適切なものに修正。もともとQUITという文字を受信すると停止するようになっているので、do_stop をそのように変更してみた。

#! /bin/sh
### BEGIN INIT INFO
# Provides:          ccludp
# Required-Start:    $remote_fs $syslog
# Required-Stop:     $remote_fs $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Clozure Common Lisp UDP Echo Server
# Description:       Clozure Common Lisp UDP Echo Server
### END INIT INFO

# Author: Name Family <auther@examples.com>

# Do NOT "set -e"

# PATH should only include /usr/* if it runs after the mountnfs.sh script
PATH=/sbin:/usr/sbin:/bin:/usr/bin
DESC="Lisp UDP Server"
NAME=ccludp
DAEMON=/usr/sbin/$NAME
#DAEMON_ARGS="--options args"
PIDFILE=/var/run/$NAME.pid
SCRIPTNAME=/etc/init.d/$NAME

# Exit if the package is not installed
[ -x "$DAEMON" ] || exit 0

# Read configuration variable file if it is present
[ -r /etc/default/$NAME ] && . /etc/default/$NAME

# Load the VERBOSE setting and other rcS variables
. /lib/init/vars.sh

# Define LSB log_* functions.
# Depend on lsb-base (>= 3.2-14) to ensure that this file is present
# and status_of_proc is working.
. /lib/lsb/init-functions

#
# Function that starts the daemon/service
#
do_start()
{
	start-stop-daemon --start --quiet --background --make-pidfile --pidfile $PIDFILE --exec $DAEMON || return 2
}

#
# Function that stops the daemon/service
#
do_stop()
{
    echo "QUIT" | nc -u -q0 1.1.1.141 7001
    RETVAL="$?"
    rm -f $PIDFILE
    return "$RETVAL"
}

#
# 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.
	#
	start-stop-daemon --stop --signal 1 --quiet --pidfile $PIDFILE --name $NAME
	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) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
	esac
	;;
  status)
	status_of_proc "$DAEMON" "$NAME" && exit 0 || exit $?
	;;
  #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
	#
	log_daemon_msg "Restarting $DESC" "$NAME"
	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

:

理由はわからないが、do_startの中でpgrepとかで該当プロセスを探すと正しいPIDでPIDファイルを生成してくれなかったが、--make-pidfileを使用することで対応。なぜデフォルトのスケルトンでは--make-pidfileが入っていないのだろうか。。。