On Fri, Apr 16, 2010 at 12:57 AM, Bob Proulx <b...@proulx.com> wrote:
> Eric Blake wrote: > > Clark J. Wang wrote: > > > In C code I can use lockf(), flock(), semaphore and mutex for locking / > > > unlocking. Can bash provide some similar mechanisms? > > > > man 1 flock > > > > If necessary, you may need to install: > > ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/ > > There is also 'lockfile' distributed with 'procmail'. > By using `lockfile' we must make sure that our script will not crash and the file is unlocked when the script exits. Although it provides timeout mechanism it's still not so convinient. > > http://www.procmail.org/ > > I tend to use 'mkdir' when I need a semaphore in a shell script. > > Bob >
