#!/bin/sh
#
# Copyright (C) 2001-2018 Graeme Walker <graeme_walker@users.sourceforge.net>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
# ===
#
# emailrelay
#
# A shell-script wrapper for E-MailRelay for use in the SysV-init system.
#
# usage: emailrelay { start | stop | restart | force-reload | status }
#
# See also: install_initd, remove_initd
#
### BEGIN INIT INFO
# Provides:            emailrelay
# Required-Start:      $local_fs $network $syslog
# Required-Stop:       $local_fs $network $syslog
# Default-Start:       2 3 4 5
# Default-Stop:        0 1 6
# Short-Description:   E-MailRelay store-and-forward MTA.
### END INIT INFO
##

PATH=/sbin:/bin:/usr/sbin:/usr/bin
NAME=emailrelay
DESC=$NAME
CONFIG=__SYSCONF_DIR__/emailrelay.conf
RUNDIR=/var/run/$NAME
PIDFILE=$RUNDIR/$NAME.pid
GROUP=daemon
DAEMON=__SBIN_DIR__/$NAME
SUBMIT=__SBIN_DIR__/$NAME-submit

test -f /etc/default/$NAME && . /etc/default/$NAME
test -f /etc/rc.conf.d/$NAME && . /etc/rc.conf.d/$NAME
test -f /etc/default/rcS && . /etc/default/rcS

log_success_msg() {
	echo "$@"
}
log_failure_msg() {
	echo "$@"
}
log_warning_msg() {
	echo "$@"
}
start_daemon() {
	if test "`cat \"$2\" 2>/dev/null`" -gt 0 2>/dev/null && kill -0 "`cat \"$2\"`"
	then
		: # running already
	else
		shift ; shift ; shift
		"$@"
	fi
}
killproc() {
	shift
	kill `cat "$1" 2>/dev/null` 2>/dev/null
}
pidofproc() {
	shift
	kill -0 `cat "$1" 2>/dev/null` 2>/dev/null
}
log_daemon_msg() {
	log_success_msg "$@"
}
log_progress_msg() {
	:;
}
log_end_msg() {
	if test "$1" -eq 0 ; then log_success_msg "...ok" ; else log_failure_msg "...failed!" ; fi
}

setup_config()
{
	if test ! -f "$CONFIG" -a -f "$CONFIG.template"
	then
		cp -p "$CONFIG.template" "$CONFIG"
	fi
}

setup_rundir()
{
	if test ! -d "$1"
	then
		mkdir -p "$1" && chgrp "$GROUP" "$1" && chmod 770 "$1"
	fi
}

spooldir()
{
	cat "$CONFIG" | tr '\t' ' ' | sed 's/  */ /g' | grep '^spool-dir [^ ]' | tail -1 | cut -d' ' -f 2
}

setup_spooldir()
{
	if test "$1" != ""
	then
		if test ! -d "$1"
		then
			mkdir -p "$1" && chgrp "$GROUP" "$1" && chmod 775 "$1" && chmod g+s "$1"
		fi
	fi
}

# do some setup steps -- these should have been done by
# make-install or by the packaging scripts, but the /etc/default
# file could have been changed or something -- do this before
# the potential init-functions redirect to systemd
if test "$1" = "start"
then
	setup_config
	setup_rundir "`dirname \"$PIDFILE\"`" 2>/dev/null
	setup_spooldir "`spooldir`" 2>/dev/null
fi

test -f /lib/lsb/init-functions && . /lib/lsb/init-functions

case "$1" in

	restart|force-reload)
		$0 stop
		$0 start
	;;

	*start)
		log_daemon_msg "Starting $DESC"
		log_progress_msg "$NAME"
		start_daemon -p "$PIDFILE" -- "$DAEMON" --syslog --pid-file "$PIDFILE" "$CONFIG"
		log_end_msg $?
		;;

	stop)
		log_daemon_msg "Stopping $DESC"
		log_progress_msg "$NAME"
		killproc -p "$PIDFILE" "$DAEMON"
		log_end_msg $?
		;;

	try-restart|reload|force-reload)
		echo `basename $0`: $1 not implemented >&2
		exit 3
		;;

	status)
		if pidofproc -p "$PIDFILE" "$DAEMON" >/dev/null
		then
			log_success_msg "$NAME is running"
			true
		else
			log_failure_msg "$NAME is not running"
			false
		fi
		;;

	setup)
		setup_rundir "`dirname \"$PIDFILE\"`"
		setup_spooldir "`spooldir`"

		chmod 550 "$DAEMON"
		chgrp "$GROUP" "$DAEMON"
		chmod g+s "$DAEMON"

		chmod 555 "$SUBMIT"
		chgrp "$GROUP" "$SUBMIT"
		chmod g+s "$SUBMIT"
		;;

	*)
		echo usage: `basename $0` "{start|stop|restart|status}" >&2
		exit 2
		;;

esac