.\"
.\" Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
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.Dd August 13, 1998
.Dt LOCKSPOOL 1
.Os
.Sh NAME
.Nm lockspool
.Nd lock user's system mailbox
.Sh SYNOPSIS
.Nm lockspool
.Sh DESCRIPTION
.Nm Lockspool
is useful for a client mail program to attain proper locking.
.Nm Lockspool
obtains a
.Nm username.lock
for the calling user and retains it until stdin is closed or a signal
like SIGINT, SIGTERM, or SIGHUP is received.
.Pp
If
.Nm 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.
.Nm Lockspool
will try up to 10 times to get the lock (sleeping
for a short period in between tries).
.Pp
The
.Nm lockspool
utility exits 0 on success, and 1 if an error occurs.
.Sh FILES
.Bl -tag -width /var/mail/username.lock -compact
.It Pa /var/mail/username.lock
user's mail lock file.
.El
.Sh HISTORY
The
.Nm lockspool
program appeared in
.Ox 2.4 .
.Sh SEE ALSO
.Xr mail 1 ,
.Xr mail.local 1 ,
.Xr sendmail 8