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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 ()
{
FILE="${1}"
# Checking lock file
if [ -f "${FILE}" ]
then
Echo_error "system locked"
exit 1
fi
}
Create_lockfile ()
{
FILE="${1}"
DIRECTORY="`dirname ${1}`"
# Creating lock directory
if [ ! -d "${DIRECTORY}" ]
then
mkdir -p "${DIRECTORY}"
fi
# Creating lock trap
trap "test -f ${FILE} && rm -f ${FILE}; exit 0" 0 2 15
# Creating lock file
touch "${FILE}"
}
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