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Re: [vox-tech] simple stupid lockfile example?
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Re: [vox-tech] simple stupid lockfile example?



begin Mike Simons <msimons@moria.simons-clan.com> 
> On Tue, Mar 18, 2003 at 12:58:01AM -0800, Bill Kendrick wrote:
> > i want to replace 'tin' with a shell script or alias that will
> > test for a lock file (and call me a moron if it exists), make a lock file,
> > run tin, and then delete the lock file...
> 
> =====
> #! /bin/bash
> 
> LOCK=$HOME/.tin.lock
> 
> lockfile $LOCK
> tin
> rm -f $LOCK
> =====
> 
> "lockfile" is part of the procmail package.
> 
>   if you ^C the script, you will have to clean up and delete the lockfile
> on your own.  there are a few ways for the script to automatically
> detect tin was killed, but you didn't ask for that.  ;)

ironically, i used to do WAY more shell programming before i ever knew
what linux was, so i'm not sure this will work under bash.

if you want to trap control-c (SIGINT), you can modify mike's script
like so:

=====
#!/bin/bash

trap (rm -f $LOCK; exit 1) 2

LOCK=$HOME/.tin.lock

lockfile $LOCK
tin
rm -f $LOCK
=====

pete

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