#!/bin/sh
#$Id$
#Copyright (c) 2014-2020 Pierre Pronchery <khorben@defora.org>
#This file is part of DeforaOS Devel scripts
#
#Redistribution and use in source and binary forms, with or without
#modification, are permitted provided that the following conditions
#are met:
#1. Redistributions of source code must retain the above copyright
#   notice, this list of conditions and the following disclaimer.
#2. Redistributions in binary form must reproduce the above copyright
#   notice, this list of conditions and the following disclaimer in the
#   documentation and/or other materials provided with the distribution.
#
#THIS SOFTWARE IS PROVIDED BY THE EDGEBSD PROJECT AND CONTRIBUTORS
#``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
#TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
#PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
#BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
#CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
#SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
#INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
#CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
#ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
#POSSIBILITY OF SUCH DAMAGE.



#variables
#executables
LOCK="mkdir"
UNLOCK="rmdir"
#settings
PROGNAME="deforaos-lock"
SYSCONFDIR="$PREFIX/etc"
#load local settings
[ -f "$SYSCONFDIR/DeforaOS/$PROGNAME.conf" ] &&
	. "$SYSCONFDIR/DeforaOS/$PROGNAME.conf"
[ -f "$HOME/.config/DeforaOS/$PROGNAME.conf" ] &&
	. "$HOME/.config/DeforaOS/$PROGNAME.conf"


#functions
#lock
_lock()
{
	lockfile="/var/tmp/$PROGNAME.$1"

	$LOCK -- "$lockfile"					|| return 2
	"$@"
	ret=$?
	$UNLOCK -- "$lockfile"
	return $ret
}


#usage
_usage()
{
	echo "Usage: $PROGNAME -- command [arguments...]" 1>&2
	return 1
}


#main
#parse the arguments
while getopts "" name; do
	case $name in
		*)
			_usage
			exit $?
			;;
	esac
done

#check the usage
shift $(($OPTIND - 1))
if [ $# -eq 0 ]; then
	_usage
	exit $?
fi

_lock "$@"