1.\" Copyright (c) 1987, 1990, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" @(#)lock.1 8.1 (Berkeley) 6/6/93 33.\" 34.Dd June 6, 1993 35.Dt LOCK 1 36.Os 37.Sh NAME 38.Nm lock 39.Nd reserve a terminal 40.Sh SYNOPSIS 41.Nm lock 42.Op Fl n 43.Op Fl p 44.Op Fl t Ar timeout 45.Sh DESCRIPTION 46.Nm Lock 47requests a password from the user, reads it again for verification 48and then will normally not relinquish the terminal until the password is 49repeated. 50There are two other conditions under which it will terminate: it 51will timeout after some interval of time and it may be killed by someone 52with the appropriate permission. 53.Pp 54Options: 55.Pp 56.Bl -tag -width Fl 57.It Fl n 58Don't use a timeout value. Terminal will be locked forever. 59.It Fl p 60A password is not requested, instead the user's current login password 61is used. 62.It Fl t Ar timeout 63The time limit (default 15 minutes) is changed to 64.Ar timeout 65minutes. 66.El 67.Sh HISTORY 68The 69.Nm lock 70command appeared in 71.Bx 3.0 . 72