#!/bin/sh
### BEGIN INIT INFO
# Provides:          ipfs daemon
# Required-Start:    $local_fs $remote_fs $network $syslog $named
# Required-Stop:     $local_fs $remote_fs $network $syslog $named
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Starts the ipfs daemon
# Description:       Starts the ipfs daemon using the start-stop-daemon
### END INIT INFO

# Author: Dylan Powers <dylan.kyle.powers@gmail.com

PATH=/sbin:/usr/sbin:/bin:/usr/bin:/usr/local/bin
DESC="ipfs daemon"
NAME=ipfs
DAEMON=/usr/local/bin/ipfs
DAEMON_ARGS="daemon --mount --migrate"
PIDFILE=/var/run/$NAME.pid
SCRIPTNAME=/etc/init.d/$NAME

IPFS_PATH=/home/ipfs/.ipfs
IPFS_USER=ipfs

# 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() {
	# Return
	#   0 if daemon has been started
	#   1 if daemon was already running
	#   2 if daemon could not be started
	start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON --test >/dev/null \
		|| return 1
	start-stop-daemon --start --quiet --pidfile $PIDFILE --make-pidfile \
	                  --background --chuid $IPFS_USER --no-close \
	                  --exec /usr/bin/env IPFS_PATH="$IPFS_PATH" $DAEMON 2>>$IPFS_PATH/daemon.log 1>/dev/null \
	                  -- $DAEMON_ARGS \
    || return 2
}

#
# 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

	# Delete the pid
	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) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
		esac
		;;
  status)
		status_of_proc "$DAEMON" "$NAME" && exit 0 || exit $?
		;;
	restart)
		do_stop
		do_start
		;;
  *)
	echo "Usage: $SCRIPTNAME {start|stop|status|restart}" >&2
	exit 3
	;;
esac
