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.\" $OpenBSD: check_expire.3,v 1.3 2001/07/13 23:06:23 millert Exp $
.\"
.\" Copyright (c) 2000 Todd C. Miller <Todd.Miller@courtesan.com>
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. The name of the author may not be used to endorse or promote products
.\" derived from this software without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
.\" INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
.\" AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
.\" THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
.\" EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
.\" PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
.\" OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
.\" WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
.\" OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
.\" ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
.\"
.Dd November 26, 2000
.Dt CHECK_EXPIRE 3
.Os
.Sh NAME
.Nm check_expire
.Nd check for password expiration
.Sh SYNOPSIS
.Fd #include <stdio.h>
.Fd #include <util.h>
.Ft int
.Fn login_check_expire "FILE *back" "struct passwd *pwd" "char *class" "int lastchance"
.Sh DESCRIPTION
The
.Fn login_check_expire
function is called by a BSD authentication login script to
check whether the user's password entry, as described by
.Fa pwd ,
has expired.
.Pp
If a
.Fa class
is specified, it is used instead of the class specified in the user's
password database entry.
If the
.Fa lastchance
argument is non-zero, the user's password has expired, and it has not been
expired longer than
.Dq password-dead
seconds (see
.Xr login.conf 5 ) ,
the user will be able to log in one last time to change the password.
.Sh RETURN VALUES
The
.Fn login_check_expire
function returns 0 if the user's password has not expired, and 1 if it has
expired or if an error occurred.
.br
Status and error messages are passed
back to the login script caller via the back channel,
.Fa back .
.Sh SEE ALSO
.Xr authenticate 3 ,
.Xr auth_subr 3 ,
.Xr login.conf 5
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