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sys/init-sysvinit/files/functions

Shell

2024 bytes at e2d5247 · GitHub

#!/bin/sh
# Portable start/stop helpers for Splux SysV scripts.
# Prefer busybox start-stop-daemon when it exists.

start_daemon()
{
	_pidfile=
	_user=
	while [ $# -gt 0 ]; do
		case $1 in
			-p) _pidfile=$2; shift 2 ;;
			-c) _user=$2; shift 2 ;;
			--) shift; break ;;
			-*) shift ;;
			*) break ;;
		esac
	done
	_bin=$1
	shift
	if [ -n "$_pidfile" ] && [ -f "$_pidfile" ]; then
		_pid=$(cat "$_pidfile" 2>/dev/null) || _pid=
		if [ -n "$_pid" ] && kill -0 "$_pid" 2>/dev/null; then
			return 0
		fi
	fi
	if command -v start-stop-daemon >/dev/null 2>&1; then
		if [ -n "$_pidfile" ]; then
			start-stop-daemon -S -b -m -p "$_pidfile" \
				${_user:+-c "$_user"} -x "$_bin" -- "$@"
		else
			start-stop-daemon -S -b ${_user:+-c "$_user"} -x "$_bin" -- "$@"
		fi
		return $?
	fi
	if [ -n "$_user" ] && command -v su >/dev/null 2>&1; then
		su -s /bin/sh "$_user" -c "exec \"$_bin\" $*" >/dev/null 2>&1 &
	else
		"$_bin" "$@" >/dev/null 2>&1 &
	fi
	_pid=$!
	if [ -n "$_pidfile" ]; then
		printf '%s\n' "$_pid" >"$_pidfile"
	fi
	return 0
}

killproc()
{
	_pidfile=
	while [ $# -gt 0 ]; do
		case $1 in
			-p) _pidfile=$2; shift 2 ;;
			-*) shift ;;
			*) break ;;
		esac
	done
	_bin=$1
	if [ -n "$_pidfile" ] && [ -f "$_pidfile" ]; then
		if command -v start-stop-daemon >/dev/null 2>&1; then
			start-stop-daemon -K -p "$_pidfile" >/dev/null 2>&1 || :
		else
			_pid=$(cat "$_pidfile" 2>/dev/null) || _pid=
			[ -n "$_pid" ] && kill "$_pid" 2>/dev/null || :
		fi
		rm -f "$_pidfile"
		return 0
	fi
	if command -v killall >/dev/null 2>&1; then
		killall "$_bin" >/dev/null 2>&1 || :
	fi
	return 0
}

pidofproc()
{
	_pidfile=
	while [ $# -gt 0 ]; do
		case $1 in
			-p) _pidfile=$2; shift 2 ;;
			-*) shift ;;
			*) break ;;
		esac
	done
	if [ -n "$_pidfile" ] && [ -f "$_pidfile" ]; then
		_pid=$(cat "$_pidfile" 2>/dev/null) || _pid=
		if [ -n "$_pid" ] && kill -0 "$_pid" 2>/dev/null; then
			printf '%s\n' "$_pid"
			return 0
		fi
		return 3
	fi
	command -v pidof >/dev/null 2>&1 || return 3
	pidof "$1" >/dev/null 2>&1
}