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#!/bin/sh
# lockfile.sh - handle lock files
# Copyright (C) 2006-2009 Daniel Baumann <daniel@debian.org>
#
# live-helper comes with ABSOLUTELY NO WARRANTY; for details see COPYING.
# This is free software, and you are welcome to redistribute it
# under certain conditions; see COPYING for details.
Check_lockfile ()
{
FILE="${1}"
if [ -z "${FILE}" ]
then
FILE="/var/lock/${PROGRAM}.lock"
fi
# Checking lock file
if [ -f "${FILE}" ]
then
Echo_error "${PROGRAM} locked"
exit 1
fi
}
Create_lockfile ()
{
FILE="${1}"
if [ -z "${FILE}" ]
then
FILE="/var/lock/${PROGRAM}.lock"
fi
DIRECTORY="$(dirname ${FILE})"
# Creating lock directory
mkdir -p "${DIRECTORY}"
# Creating lock trap
trap 'ret=${?}; '"rm -f \"${FILE}\";"' exit ${ret}' EXIT HUP INT QUIT TERM
# Creating lock file
touch "${FILE}"
}
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