linux/scripts/init/inithelpers/fns.sh

#!/bin/sh

# Author: Adrian Kousz, 2014
# See:
# https://wiki.debian.org/LSBInitScripts
# https://github.com/jasonblewis/sample-service-script/blob/master/service.sh

is_running() {
	if [ -r "$1" ]; then
		kill -0 $(cat "$1") 2>&-
		return
	fi
	return 1
}

stop() {
	if is_running "$1"; then
		kill -INT $(cat "$1") && rm -f "$1"
		echo 'Service stopped'
	else
		echo 'Service not running'
		return 7
	fi
}

status() {
	if [ -r "$1" ]; then
		PID=$(cat "$1")
		$KILL=$(kill -0 $PID 2>&1 >&-)
		if [ $? ]; then
			echo "Service running, PID = $PID"
			return 0
		else
			if [ -z "$KILL" ]; then
				echo "Process is dead, PID file = $1"
				return 1
			else
				echo "$KILL"
				return 4
			fi
		fi
	else
		echo 'Service not running'
		return 3
	fi
}