.\"-
.\" Copyright (c) 2011-2017 Dag-Erling Smørgrav
.\" 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. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
.\"    documentation and/or other materials provided with the distribution.
.\" 3. 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 BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
.\"
.\" $OpenPAM: su.1 947 2019-02-24 20:18:17Z des $
.\"
.Dd February 24, 2019
.Dt SU 1
.Os
.Sh NAME
.Nm su
.Nd switch user identity
.Sh SYNOPSIS
.Nm
.Op Ar login Op Ar ...
.Sh DESCRIPTION
The
.Nm
utility starts a shell under the identity of the user specified by the
first argument on the command line.
If no user is specified, the default is
.Dq root .
.Pp
Any additional command-line arguments are passed as-is to the shell.
.Pp
The requesting user is authenticated using the
.Dq su
PAM policy.
.Sh IMPLEMENTATION NOTES
The
.Nm
utility is provided with the OpenPAM library as a sample application
and should not be used in production systems.
.Sh SEE ALSO
.Xr openpam 3 ,
.Xr pam 3
.Sh AUTHORS
The
.Nm
utility and this manual page were written by
.An Dag-Erling Sm\(/orgrav Aq Mt des@des.no .