mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-18 17:01:03 +00:00
a8874eadae
Mon Aug 12 04:33:09 1996 Ulrich Drepper <drepper@cygnus.com> * nss/nsswitch.c (__nss_database_lookup): Always release locks before returning. Reported by Miles Bader. (distributes): Add databases.def.
46 lines
1.3 KiB
Bash
Executable File
46 lines
1.3 KiB
Bash
Executable File
#! /bin/sh
|
|
# interlock - wrap program invocation in lock to allow
|
|
# parallel builds to work.
|
|
# Written by Tom Tromey <tromey@cygnus.com>, Aug 10 1996
|
|
#
|
|
# This program is free software; you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation; either version 2, or (at your option)
|
|
# any later version.
|
|
#
|
|
# This program is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program; if not, write to the Free Software
|
|
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
|
|
# Usage:
|
|
# interlock lock-dir-name program args-to-program...
|
|
|
|
dirname="$1"
|
|
program="$2"
|
|
|
|
shift
|
|
shift
|
|
|
|
while (mkdir $dirname > /dev/null 2>&1 && exit 1 || exit 0); do
|
|
# Wait a bit.
|
|
sleep 1
|
|
done
|
|
|
|
# Race condition here: if interrupted after the loop but before this
|
|
# trap, the lock can be left around.
|
|
trap "rmdir $dirname > /dev/null 2>&1" 1 2 3 15
|
|
|
|
# We have the lock, so run the program.
|
|
$program ${1+"$@"}
|
|
ret=$?
|
|
|
|
# Release the lock.
|
|
rmdir $dirname > /dev/null 2>&1
|
|
|
|
exit $ret
|