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#!/bin/sh
# lockfile.sh - handle lock files
# Copyright (C) 2006-2007 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.
set -e
Check_lockfile ()
{
LOCKFILE="${1}"
# Checking lock file
if [ -f "${LOCKFILE}" ]
then
echo "E: system locked"
exit 1
fi
}
Create_lockfile ()
{
LOCKFILE="${1}"
LOCKDIRECTORY="`dirname ${1}`"
# Creating lock directory
if [ ! -d "${LOCKDIRECTORY}" ]
then
mkdir -p "${LOCKDIRECTORY}"
fi
# Creating lock trap
trap "test -f ${LOCKFILE} && rm -f ${LOCKFILE}; exit 0" 0 2 15
# Creating lock file
touch "${LOCKFILE}"
}
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