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passwd login script; authenticates the user via passwd/yp
will be used when BSD authentication is enabled

.\" $OpenBSD: login_passwd.8,v 1.1 2000/12/12 02:33:44 millert Exp $
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.\" Copyright (c) 2000 Todd C. Miller <Todd.Miller@courtesan.com>
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.Dd December 11, 2000
.Dt LOGIN_PASSWD 8
.Os
.Sh NAME
.Nm login_passwd
.Nd provide standard password authentication type
.Sh SYNOPSIS
.Nm
.Op Fl s Ar service
.Op Fl v Ar wheel=yes|no
.Op Fl v Ar lastchance=yes|no
.Ar user
.Op Ar class
.Sh DESCRIPTION
.Pp
The
.Nm
utility is called by
.Xr login 1 ,
.Xr su 1 ,
.Xr ftpd 8 ,
and others to authenticate the
.Ar user
with passwd-style authentication.
.Pp
The
.Ar user
argument is the name of the user to be authenticated.
If
.Ar user
is of the form
.Ar name. Ns Li root
and
.Ar name. Ns Li root
is not found in the password file, the entry for
.Li root
is used.
This is done to support
.Xr su 1 ,
which uses kerberos-style root instances.
.Pp
The
.Ar service
argument specifies which protocol to use with the
invoking program.  The allowed protocols are
.Em login ,
.Em challenge ,
and
.Em response .
(The
.Em challenge
protocol is silently ignored but will report success as passwd-style
authentication is not challenge-response based).
.Pp
If the
.Ar wheel
argument is specified and is not set to
.Dq yes ,
then the user will be rejected as not being in group
.Dq wheel .
This is used by
.Xr su 1 .
.Pp
If the
.Ar lastchance
argument is specified and is equal to
.Dq yes ,
then if 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.
.Pp
.Nm
will prompt the user for a password and report back to the
invoking program whether or not the authentication was
successful.
.Sh SEE ALSO
.Xr login 1 ,
.Xr passwd 1 ,
.Xr su 1 ,
.Xr login.conf 5 ,
.Xr ftpd 8