|LOCKSPOOL(1)||General Commands Manual||LOCKSPOOL(1)|
lockspoolis useful for a client mail program to attain proper locking.
lockspoolobtains a username.lock for the calling user and retains it until stdin is closed or a signal like
SIGHUPis received. Additionally, the superuser may specify the name of a user in order to lock a different mailbox.
lockspool is able to create the lock
file, “1” is written to stdout, otherwise “0” is
written and an error message is written to stderr.
lockspool will try up to 10 times to get the lock
(sleeping for a short period in between tries).
Typical usage is for a user mail agent (such as
mail(1)) to open a pipe to
lockspool when it needs to lock the user's mail
spool. Closing the pipe will cause
release the lock.
lockspoolutility exits 0 on success, and 1 if an error occurs. mail(1), mail.local(8), smtpd(8)
lockspoolprogram appeared in OpenBSD 2.4.
|January 25, 2019||OpenBSD-current|