]>
git.ipfire.org Git - people/stevee/network.git/blob - src/functions/functions.lock
2 ###############################################################################
4 # IPFire.org - A linux based firewall #
5 # Copyright (C) 2012 Michael Tremer & Christian Schmidt #
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. #
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. #
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/>. #
20 ###############################################################################
25 if [ "${name:0:1}" = "/" ]; then
28 echo "${LOCK_DIR}/network-${name}"
36 local lockfile
=$
(__lock_path
${name})
38 if [ -e "${lockfile}" ]; then
49 # timeout value in seconds
52 if ! isset timeout
; then
56 local lockfile
=$
(__lock_path
${name})
58 timeout
=$
(( ${timeout} * 4 ))
60 log DEBUG
"Acquiring lock '${name}'"
62 # Wait until lock is available
63 while [ ${timeout} -gt 0 ] && [ -e "${lockfile}" ]; do
64 timeout
=$
(( ${timeout} - 1 ))
68 # If another lock still exists, we return an error
69 if [ -e "${lockfile}" ]; then
70 error
"Could not acquire lock '${name}'"
74 # Write out pid to the lockfile and make sure that
75 # nobody else can access it.
76 echo "$$" > ${lockfile}
84 local lockfile
=$
(__lock_path
${name})
86 log DEBUG
"Releasing lock '${name}'"
88 # Remove the lockfile (okay if it does not exist).