#! /bin/sh
### BEGIN INIT INFO
# Provides:          saslauthd
# Required-Start:    $local_fs $remote_fs
# Required-Stop:     $local_fs $remote_fs
# Default-Start:     2 3 4 5
# Default-Stop:      S 0 1 6
# Short-Description: saslauthd startup script
# Description:       This script starts the saslauthd daemon. It is
#                    configured using the file /etc/default/saslauthd.
### END INIT INFO

# Author: Fabian Fagerholm <fabbe@debian.org>
#
# Based on previous work by Dima Barsky.

# Do NOT "set -e"

# PATH should only include /usr/* if it runs after the mountnfs.sh script
PATH=/usr/sbin:/usr/bin:/sbin:/bin
DESC="SASL Authentication Daemon"
NAME=saslauthd
DAEMON=/usr/sbin/$NAME
DAEMON_ARGS=""
SCRIPTNAME=/etc/init.d/$NAME
FALLBACK_RUN_DIR=/var/run/$NAME
EXIT_ERROR_CODE=1

# Exit if the daemon is not installed
test -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
[ -f /etc/default/rcS ] && . /etc/default/rcS

# Define LSB log_* functions.
# Depend on lsb-base (>= 3.0-6) to ensure that this file is present.
. /lib/lsb/init-functions

# Determine run directory and pid file location by looking for an -m option.
RUN_DIR=`echo "$OPTIONS" | xargs -n 1 echo | sed -n '/^-m$/{n;p}'`
if [ -z "$RUN_DIR" ]; then
	# No run directory defined in defaults file, use fallback
	RUN_DIR=$FALLBACK_RUN_DIR
fi
PIDFILE=$RUN_DIR/saslauthd.pid

# If the daemon is not enabled, give the user a warning and then exit,
# unless we are stopping the daemon
if [ "$START" != "yes" -a "$1" != "stop" ]; then
	log_warning_msg "To enable $NAME, edit /etc/default/$NAME and set START=yes"
	exit 0
fi

# If no mechanisms are defined, log this and exit
if [ -z "$MECHANISMS" ]; then
	log_failure_msg "No mechanisms defined in /etc/default/$NAME," \
			"not starting $NAME"
	exit $EXIT_ERROR_CODE
fi

# If there are mechanism options defined, prepare them for use with the -O flag
if [ -n "$MECH_OPTIONS" ]; then
	MECH_OPTIONS="-O $MECH_OPTIONS"
fi

# If there is a threads option defined, prepare it for use with the -n flag
if [ -n "$THREADS" ]; then
	THREAD_OPTIONS="-n $THREADS"
fi

# Construct argument string
DAEMON_ARGS="$DAEMON_ARGS -a $MECHANISMS $MECH_OPTIONS $OPTIONS $THREAD_OPTIONS"

#
# Function that creates a directory with the specified
# ownership and permissions
#
createdir()
{
# $1 = user
# $2 = group
# $3 = permissions (octal)
# $4 = path to directory
	# In the future, use -P/-Z to have SE Linux enhancement.
	install -d --group="$2" --mode="$3" --owner="$1" "$4"
}

#
# 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

	if dpkg-statoverride --list $RUN_DIR > /dev/null; then
		dir=`dpkg-statoverride --list $RUN_DIR`
	fi
	test -z "$dir" || createdir $dir

	start-stop-daemon --start --quiet --pidfile $PIDFILE --name $NAME \
		--exec $DAEMON --test > /dev/null \
		|| return 1
	start-stop-daemon --start --quiet --pidfile $PIDFILE --name $NAME \
		--exec $DAEMON -- $DAEMON_ARGS \
		|| return 2
	# Add code here, if necessary, that waits for the process to be ready
	# to handle requests from services started subsequently which depend
	# on this one.  As a last resort, sleep for some time.
}

#
# Function that stops the daemon/service
#
do_stop()
{
	# 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
	start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 \
		--pidfile $PIDFILE --name $NAME
	RETVAL="$?"
	[ "$RETVAL" = 2 ] && return 2
	# Wait for children to finish too if this is a daemon that forks
	# and if the daemon is only ever run from this initscript.
	# If the above conditions are not satisfied then add some other code
	# that waits for the process to drop all resources that could be
	# needed by services started subsequently.  A last resort is to
	# sleep for some time.
	start-stop-daemon --stop --quiet --oknodo --retry=0/30/KILL/5 \
		--exec $DAEMON
	[ "$?" = 2 ] && return 2
	# Many daemons don't delete their pidfiles when they exit.
	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 "$?" in
		0) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
		1) [ "$VERBOSE" != no ] && log_progress_msg "(already running)" && \
		                           log_end_msg 0 ;;
		2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
	esac
	;;
  stop)
	[ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME"
	do_stop
	case "$?" in
		0) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
		1) [ "$VERBOSE" != no ] && log_progress_msg "(not running)" && \
		                           log_end_msg 0 ;;
		2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
	esac
	;;
  #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|force-reload}" >&2
	exit 3
	;;
esac

:
