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8c63fa13 MT |
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 | ||
aa96e2b9 MT |
22 | lock() { |
23 | local lock="${1}" | |
24 | shift | |
25 | ||
2c19aa07 MT |
26 | # Move locks with name only into lock directory |
27 | if [ "${lock:0:1}" != "/" ]; then | |
28 | lock="${LOCK_DIR}/${lock}" | |
29 | fi | |
30 | ||
aa96e2b9 MT |
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 | } |