]> git.ipfire.org Git - people/ms/network.git/blame - src/functions/functions.lock
Drop old locking functions
[people/ms/network.git] / src / functions / functions.lock
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1#!/bin/bash
2###############################################################################
3# #
4# IPFire.org - A linux based firewall #
5# Copyright (C) 2012 Michael Tremer & Christian Schmidt #
6# #
7# This program is free software: you can redistribute it and/or modify #
8# it under the terms of the GNU General Public License as published by #
9# the Free Software Foundation, either version 3 of the License, or #
10# (at your option) any later version. #
11# #
12# This program is distributed in the hope that it will be useful, #
13# but WITHOUT ANY WARRANTY; without even the implied warranty of #
14# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
15# GNU General Public License for more details. #
16# #
17# You should have received a copy of the GNU General Public License #
18# along with this program. If not, see <http://www.gnu.org/licenses/>. #
19# #
20###############################################################################
21
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22lock() {
23 local lock="${1}"
24 shift
25
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26 # Move locks with name only into lock directory
27 if [ "${lock:0:1}" != "/" ]; then
28 lock="${LOCK_DIR}/${lock}"
29 fi
30
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31 local timeout="60"
32
33 # Make partent directory
34 make_parent_directory "${lock}"
35
36 (
37 log DEBUG "Trying to acquire lock ${lock}"
38
39 # Try to acquire lock on fd 9
40 if ! flock -w "${timeout}" 9; then
41 log ERROR "Failed to acquire lock ${lock} after ${timeout} seconds"
42 exit ${EXIT_ERROR}
43 fi
44
45 log DEBUG "Acquired lock ${lock}"
46
47 # Remember return code
48 ret=${EXIT_OK}
49
50 # Run command
51 "$@" || ret=$?
52
53 log DEBUG "Released lock ${lock}"
54
55 exit ${ret}
56 ) 9>${lock} || exit $?
57}