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1.\" $NetBSD: logname.1,v 1.8 1997/10/19 04:20:06 lukem Exp $
2.\"
3.\" Copyright (c) 1991, 1993
4.\" The Regents of the University of California. All rights reserved.
5.\"
6.\" This code is derived from software contributed to Berkeley by
7.\" the Institute of Electrical and Electronics Engineers, Inc.
8.\"
9.\" Redistribution and use in source and binary forms, with or without
10.\" modification, are permitted provided that the following conditions
11.\" are met:
12.\" 1. Redistributions of source code must retain the above copyright
13.\" notice, this list of conditions and the following disclaimer.
14.\" 2. Redistributions in binary form must reproduce the above copyright
15.\" notice, this list of conditions and the following disclaimer in the
16.\" documentation and/or other materials provided with the distribution.
17.\" 3. All advertising materials mentioning features or use of this software
18.\" must display the following acknowledgement:
19.\" This product includes software developed by the University of
20.\" California, Berkeley and its contributors.
21.\" 4. Neither the name of the University nor the names of its contributors
22.\" may be used to endorse or promote products derived from this software
23.\" without specific prior written permission.
24.\"
25.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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36.\"
37.\" @(#)logname.1 8.1 (Berkeley) 6/9/93
38.\"
39.Dd June 9, 1993
40.Dt LOGNAME 1
41.Os BSD 4.4
42.Sh NAME
43.Nm logname
44.Nd display user's login name
45.Sh SYNOPSIS
46.Nm
47.Sh DESCRIPTION
48The
49.Nm
50utility writes the user's login name to standard output followed by
51a newline.
52.Pp
53The
54.Nm
55utility explicitly ignores the
56.Ev LOGNAME
57and
58.Ev USER
59environment variables
60because the environment cannot be trusted.
61.Pp
62The
63.Nm
64utility exits 0 on success, and >0 if an error occurs.
65.Sh SEE ALSO
66.Xr who 1 ,
67.Xr whoami 1 ,
68.Xr getlogin 2
69.Sh STANDARDS
70The
71.Nm
72utility conforms to
73.St -p1003.2-92 .
74.Sh HISTORY
75The
76.Nm
77command appeared in
78.Bx 4.4 .