lockspool - lock user's system mailbox
lockspool is useful for a client mail program to attain
lockspool obtains a username.lock for the calling user and
retains it until
stdin is closed or a signal like SIGINT, SIGTERM, or
SIGHUP is received.
Additionally, the superuser may specify the name of
a user in
order to lock a different mailbox.
If lockspool is able to create the lock file, ``1'' is written to stdout,
otherwise ``0'' is written and an error message is written
lockspool will try up to 10 times to get the lock (sleeping
for a short
period in between tries).
The lockspool utility exits 0 on success, and 1 if an error
/var/mail/username.lock user's mail lock file
mail(1), mail.local(8), sendmail(8)
The lockspool program appeared in OpenBSD 2.4.
OpenBSD 3.6 August 13, 1998
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