home/.config/dtfscripts/common_service.sh

#! /usr/bin/env bash
#
# wmstartup service common functions
# Copyright (C) 2018 salt <salt@lap-th-e560-0>
#
# Distributed under terms of the MIT license.
#

service_name="unnamed_service"
service_process="true"
service_kill_on_reload="true"
service_flags=""

# Basic logging service. Do not override unless necessary
function svc_log() {
	if [ -z ${1+x} ]; then return 1; fi
	out=1
	if ! [ -z ${2+x} ]; then out="$2"; fi
	col_reset="\e[0m"
	col_svcname="\e[94m"
	col_message="\e[39m"
	if ! [ "$out" -eq "1" ]; then col_message="\e[31m"; fi
	if [ "$out" -eq "0" ]; then
		out=1
		col_message="\e[37m"
	fi
	dtf_log "${col_svcname}${service_name}${col_reset}: ${col_message}${1}${col_reset}" >&${out}
}

# Basic pre-start checks. Stick extra checks in prestart-extra
function prestart() {
	if isup; then
		svc_log "Already running" 0
		return 1
	fi
	if ! which $service_process > /dev/null 2>&1; then
		svc_log "Could not find associated binary: \"${service_process}\"" 2
		return 1
	fi
	return 0
}

# Template function. If it fails, the service will not be started
function prestart-extra() {
	return 0
}

# Basic start function. Override if you have special startup functionality
function start() {
	svc_log "Starting"
	$service_process $service_flags > /dev/null 2>&1 &
	return 0
}

# Template function. Override for post-startup tasks
# Can also be used for blocking
function start-extra() {
	return 0
}

# Basic stop function. Kills the task and implements a SIGKILL timer
function stop() {
	svc_log "Stopping"
	killall $service_process &
	for i in {1..100}; do
		if ! isup; then break; fi
		sleep 0.01
		if (( $i > 99 )); then
			svc_log "Stopping with prejudice"
			killall -9 $service_process
		fi
	done
	return $?
}

# Basic process detection function. Returns 0 if the process exists.
function isup() {
	pgrep "$service_process" > /dev/null 2>&1
	isup-extra $?
	return $?
}

# Template function. Gets passed the result of a simple pgrep for the process
function isup-extra() {
	return $1
}