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From: Peter Jeremy <peter.jeremy@alcatel.com.au>
Subject: Re: cvs commit: src/games/fortune/datfiles fortunes
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To: Josef Karthauser <joe@pavilion.net>
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On 2000-Aug-23 18:42:40 +0100, Josef Karthauser <joe@pavilion.net> wrote:
>If we had an incrementing number we need locking and a counter file.

Which isn't that difficult.  Perl provides access to flock() and
fcntl() so there would be nothing preventing the commit script from

	open(SERIAL, '+>/path/to/serial/number');
	flock(SERIAL, 2);
	$serial = 0 + <SERIAL>;
	print SERIAL $serial + 1, "\n";
	close(SERIAL);

(with approprate error checking added).  I agree that this would add
a serialisation operation to the commit process, but the lock should
only be held for a fraction of a second and so shouldn't noticably
slow down commits.

Peter


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