3 # Copyright 2018 Paul Hänsch
5 # This is a file format helper, part of CGIlite.
7 # CGIlite is free software: you can redistribute it and/or modify
8 # it under the terms of the GNU Affero 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 # CGIlite 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 Affero General Public License for more details.
17 # You should have received a copy of the GNU Affero General Public License
18 # along with CGIlite. If not, see <http://www.gnu.org/licenses/>.
23 if [ \! -w "${lock%/*}" ] || [ -e "$lock" -a \! -d "$lock" ]; then
24 printf 'Impossible to get lock: %s\n' "$lock" >&2
28 while ! mkdir "$lock"; do
29 block="$(cat "$lock/pid" || printf 1)"
30 if ! { ps -eo pid |grep -qwF "$block"; }; then
31 printf 'Overriding stale lock: %s\n' "$lock" >&2
34 if [ $timeout -le 0 ]; then
35 printf 'Timeout while trying to get lock: %s\n' "$lock" >&2
38 timeout=$((timeout - 1))
41 printf '%i\n' $$ >"${lock}/pid"
47 if [ "$(cat "$lock/pid")" = "$$" ]; then
49 if ! rmdir "$lock"; then
50 printf 'Cannot remove tainted lock: %s\n' "$lock" >&2
51 printf '%i\n' $$ >"${lock}/pid"
55 printf 'Refusing to release foreign lock: %s\n' "$lock" >&2
61 printf %s "$*" |sed -r '
71 printf %s "$*" |sed -r '
73 s;((^|[^\\])(\\\\)*)\\n;\1\n;g;
74 s;((^|[^\\])(\\\\)*)\\t;\1\t;g;
75 s;((^|[^\\])(\\\\)*)\\r;\1\r;g;