NAME
lockspool —
lock user's system mailbox
SYNOPSIS
lockspool |
[username] |
DESCRIPTION
lockspool is useful for a client mail
program to attain proper locking. 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 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
lockspool to release the lock.
FILES
- /var/mail/username.lock
- user's mail lock file
EXIT STATUS
The lockspool utility exits 0 on success,
and 1 if an error occurs.
SEE ALSO
HISTORY
The lockspool program appeared in
OpenBSD 2.4.