#!/bin/sh
# See init-d-script(5) for instructions on how to use this library.
#=============================================================================

# Shift arguments early to fix #826214
__init_d_script_name="$1"
shift

# Define LSB log_* functions.
# Depend on sysvinit-utils (>= 3.05-1) to ensure that this file is present
# and status_of_proc is working.
. /lib/lsb/init-functions

# PATH should only include /usr/* if it runs after the mountnfs.sh
# script.  Scripts running before mountnfs.sh should remove the /usr/*
# entries.
PATH=/usr/sbin:/usr/bin:/sbin:/bin
export PATH

is_call_implemented() {
	PATH= command -V $1 >/dev/null 2>&1
}

do_usage() {
	if is_call_implemented do_reload; then
		echo "Usage: $SCRIPTNAME {start|stop|status|reload|restart|try-restart|force-reload}" >&2
	else
		echo "Usage: $SCRIPTNAME {start|stop|status|restart|try-restart|force-reload}" >&2
	fi
}

call() {
	cmd="$1"
	shift
	if is_call_implemented ${cmd}_override; then
		${cmd}_override "$@"
	else
		${cmd} "$@"
	fi
}

#
# Support for oneshot services
#
oneshot() {
	[ "$TYPE" = oneshot ] || return
	case $1 in
		start-pre) [ -f /run/$NAME.oneshot ] && exit ;;
		start-post) touch /run/$NAME.oneshot ;;
		stop-pre) [ ! -f /run/$NAME.oneshot ] && exit ;;
		stop-post) rm -f /run/$NAME.oneshot ;;
		status)
			if [ -f /run/$NAME.oneshot ]; then
				log_success_msg "$NAME (oneshot) has been run"
			else
				log_failure_msg "$NAME (oneshot) has not been run"
			fi
			;;
		*) echo "ERROR: invalid oneshot request: $1" >&2 ;;
	esac
}

#
# Function that starts the daemon/service
#

do_start_cmd() {
	${SETPRIV_ARGS:+setpriv $SETPRIV_ARGS} start-stop-daemon --start --quiet \
		${PIDFILE:+--pidfile "$PIDFILE"} \
		${COMMAND_NAME:+--name "$COMMAND_NAME"} \
		${DAEMON:+--exec "$DAEMON"} $START_ARGS -- $DAEMON_ARGS
}

do_start() {
	oneshot start-pre
	if is_call_implemented do_start_prepare; then
		call do_start_prepare
	fi
	log_daemon_msg "Starting $DESC" "$NAME"
	call do_start_cmd
	retval=$?
	if [ "$retval" = 0 ]; then
		oneshot start-post
	fi
	if [ "$retval" = 1 ] && [ no != "$VERBOSE" ]; then
		log_progress_msg "is already running"
	fi
	retval=$((retval > 1))
	vlog_end_msg $retval
	if is_call_implemented do_start_cleanup; then
		call do_start_cleanup
	fi
	return $retval
}

#
# Function that stops the daemon/service
#

do_stop_cmd() {
	start-stop-daemon --stop --quiet \
		--retry=CONT/0/TERM/30/KILL/5 \
		${PIDFILE:+--pidfile "$PIDFILE"} \
		${COMMAND_NAME:+--name "$COMMAND_NAME"} \
		${DAEMON:+--exec "$DAEMON"} $STOP_ARGS
	RETVAL="$?"
	[ "$RETVAL" = 2 ] && return 2
	# Wait for children to finish too if this is a daemon that forks
	# and if the daemon is only ever run from this initscript.
	# If the above conditions are not satisfied then add some other code
	# that waits for the process to drop all resources that could be
	# needed by services started subsequently.  A last resort is to
	# sleep for some time.
	if [ -n "$DAEMON" ]; then
		start-stop-daemon --stop --quiet --oknodo \
			--retry=0/30/KILL/5 --exec "$DAEMON" $STOP_ARGS
		[ "$?" = 2 ] && return 2
	fi
	# Many daemons don't delete their pidfiles when they exit.
	rm -f $PIDFILE
	return $RETVAL
}

do_stop() {
	oneshot stop-pre
	if is_call_implemented do_stop_prepare; then
		call do_stop_prepare
	fi
	vlog_daemon_msg "Stopping $DESC" "$NAME"
	call do_stop_cmd
	retval=$?
	# Oneshot stop is unconditional
	oneshot stop-post
	if [ "$retval" = 1 ] && [ no != "$VERBOSE" ] &&
		[ "$TYPE" != oneshot ]; then
		log_progress_msg "is not running"
	fi
	retval=$((retval > 1))
	vlog_end_msg $retval
	if is_call_implemented do_stop_cleanup; then
		call do_stop_cleanup
	fi
	return $retval
}

do_restart() {
	if is_call_implemented do_restart_prepare; then
		call do_restart_prepare
	fi
	vlog_daemon_msg "Restarting $DESC" "$NAME"
	call do_stop_cmd
	retval=$(($? > 1))
	if [ $retval -eq 0 ]; then
		call do_start_cmd
		retval=$(($? > 1))
	fi
	vlog_end_msg $retval
	if is_call_implemented do_restart_cleanup; then
		call do_restart_cleanup
	fi
	return $retval
}

# Wrapper for do_reload_cmd
do_reload_wrapper() {
	if is_call_implemented do_reload_prepare; then
		call do_reload_prepare
	fi
	vlog_daemon_msg "Reloading $DESC configuration files" "$NAME"
	call do_reload_cmd
	retval=$(($? != 0))
	vlog_end_msg $retval
	if is_call_implemented do_reload_cleanup; then
		call do_reload_cleanup
	fi
	return $retval
}

# To enable this function, RELOAD_SIGNAL should be set to the kill signal
do_reload_signal() {
	start-stop-daemon --stop --signal $RELOAD_SIGNAL --quiet \
		${PIDFILE:+--pidfile "$PIDFILE"} \
		${COMMAND_NAME:+--name "$COMMAND_NAME"} \
		${DAEMON:+--exec "$DAEMON"} $RELOAD_ARGS
}

# Deprecated: use RELOAD_SIGNAL instead for newer scripts
# Enable this using
# alias do_reload=do_reload_sigusr1
do_reload_sigusr1() {
	RELOAD_SIGNAL=1
	do_reload_cmd() { do_reload_signal; }
	do_reload_wrapper
}

do_status() {
	if [ "$TYPE" = oneshot ]; then
		oneshot status
	else
		status_of_proc ${PIDFILE:+-p "$PIDFILE"} "${DAEMON:-none}" "$NAME"
	fi
}

if [ "$DEBUG" = "true" ]; then
	set -x
fi

# Unset configuration variables to make sure that if variable is not assigned a
# value in init script, it does not use one from environment. See #822918.
unset DAEMON DAEMON_ARGS DESC NAME COMMAND_NAME PIDFILE \
	RELOAD_ARGS RELOAD_SIGNAL START_ARGS STOP_ARGS SETPRIV_ARGS TYPE

SCRIPTNAME="$__init_d_script_name"
scriptbasename=${__init_d_script_name##*/}
if [ "$scriptbasename" != "init-d-script" ]; then
	. "$__init_d_script_name"
else
	exit 0
fi

: ${NAME:=${DAEMON##*/}}
: ${DESC:=$NAME}
: ${COMMAND_NAME:=${NAME}}

# Do not use pid file if $PIDFILE is 'none'.  Otherwise, generate from
# $NAME or use the value provided by the init.d script.
if [ none = "$PIDFILE" ]; then
	PIDFILE=
elif [ -z "$PIDFILE" ]; then
	PIDFILE=/var/run/$NAME.pid
fi

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

# Exit if the package is not installed
if [ none != "$DAEMON" ] && [ ! -x "$DAEMON" ]; then
	exit 0
fi

# Do not use DAEMON or COMMAND_NAME if they are set to 'none'.
[ none = "$DAEMON" ] && DAEMON=
[ none = "$COMMAND_NAME" ] && COMMAND_NAME=

# Load the VERBOSE setting and other rcS variables
. /lib/init/vars.sh
if [ -t 0 ]; then # Be verbose when called from a terminal
	VERBOSE=yes
fi

# Setup do_reload if not already defined
if ! is_call_implemented do_reload; then
	if ! is_call_implemented do_reload_cmd && [ -n "$RELOAD_SIGNAL" ]; then
		do_reload_cmd() { do_reload_signal; }
	fi
	if is_call_implemented do_reload_cmd; then
		alias do_reload=do_reload_wrapper
	fi
fi

# Check if setpriv is available
if [ "$SETPRIV_ARGS" ]; then
	if ! PATH=/bin:/usr/bin command -v setpriv >/dev/null 2>&1; then
		echo "WARNING: setpriv not available, ignoring SETPRIV_ARGS" >&2
		unset SETPRIV_ARGS
	fi
fi

case "$1" in
	start)
		call do_start
		;;
	stop)
		call do_stop
		;;
	status)
		call do_status
		;;
	reload)
		if is_call_implemented do_reload; then
			do_reload
		else
			call do_usage
			exit 3
		fi
		;;
	force-reload)
		if is_call_implemented do_force_reload; then
			call do_force_reload
		elif is_call_implemented do_reload; then
			do_reload
		else
			call do_restart
		fi
		;;
	restart)
		call do_restart
		;;
	try-restart)
		vlog_daemon_msg "Trying to restart $DESC" "$NAME"
		if (call do_status) >/dev/null; then
			(call do_restart) >/dev/null
		else
			[ no != "$VERBOSE" ] && log_progress_msg "is not running"
			true
		fi
		vlog_end_msg $?
		;;
	'')
		call do_usage
		exit 3
		;;
	*)
		if is_call_implemented do_unknown; then
			call do_unknown "$1"
			exit 3
		else
			call do_usage
			exit 3
		fi
		;;
esac
exit $? # See https://bugs.debian.org/822753#53