#! /bin/bash
### BEGIN INIT INFO
# Provides:          ttrss-DOMAIN
# Required-Start:    $local_fs $remote_fs networking
# Required-Stop:     $local_fs $remote_fs
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Tiny Tiny RSS update daemon for DOMAIN
# Description:       Update the Tiny Tiny RSS subscribed syndication feeds.
### END INIT INFO

# Author: Pierre-Yves Landuré <pierre-yves@landure.org>

# 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="Tiny Tiny RSS update daemon"
NAME="$(command basename "${0}")"
DISABLED=0
FORKING=0

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

DAEMON_SCRIPT="update.php -daemon"

if [ "${FORKING}" != "0" ]; then
	DAEMON_SCRIPT="update_daemon2.php"
fi

DAEMON="/usr/bin/php"
DAEMON_ARGS="${TTRSS_PATH}/${DAEMON_SCRIPT}"
DAEMON_DIR="${TTRSS_PATH}"
PIDFILE="/var/run/tt-rss/DOMAIN/${NAME}.pid"
SCRIPTNAME="/etc/init.d/${NAME}"
USER="www-data"
GROUP="www-data"

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

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

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

if [ "${DISABLED}" != "0" -a "${1}" != "stop" ]; then
	command log_warning_msg "Not starting ${DESC} - edit /etc/default/tt-rss-DOMAIN and change DISABLED to be 0.";
	exit 0;
fi

#
# 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
	command start-stop-daemon --start --make-pidfile --chuid "${USER}" --group "${GROUP}" --background --quiet --chdir "${DAEMON_DIR}" --pidfile "${PIDFILE}" --exec "${DAEMON}" --test > /dev/null \
		|| return 1

	command start-stop-daemon --start --make-pidfile --chuid "${USER}" --group "${GROUP}" --background --quiet --chdir "${DAEMON_DIR}" --pidfile "${PIDFILE}" --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
	command start-stop-daemon --stop --make-pidfile --user "${USER}" --group "${GROUP}" --quiet --retry=TERM/1/KILL/5 --pidfile "${PIDFILE}"
	RETVAL="$?"
	[ "${RETVAL}" = 2 ] && return 2
	# Wait for children to finish too if this is a daemon that forks
	# and if the daemon is only ever run from this initscript.
	# If the above conditions are not satisfied then add some other code
	# that waits for the process to drop all resources that could be
	# needed by services started subsequently.  A last resort is to
	# sleep for some time.
	command start-stop-daemon --stop --quiet --user "${USER}" --group "${GROUP}" --oknodo --retry=0/1/KILL/5 --pidfile "${PIDFILE}"
	[ "$?" = 2 ] && return 2
	# Many daemons don't delete their pidfiles when they exit.
	command rm -f "${PIDFILE}"
	return "${RETVAL}"
}


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
	;;
  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