dot-locking

[bruce@pixar.com (Bruce Perens)]

You could leave the flock locking on and surround it with dot-locking.
To perform dot-locking, create the file <mailbox-name>.lock using
open(name, O_CREAT|O_EXCL, 0644). Create with O_EXCL will fail if the
file exists. If you can't create it, sleep for a while and try again.
To unlock, unlink() the file.

	Thanks

	Bruce
--
Bruce Perens K6BP   Bruce@Pixar.com   510-215-3502
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