1.\" $NetBSD: lock.1,v 1.4 1994/12/22 01:16:21 jtc Exp $ 2.\" 3.\" Copyright (c) 1987, 1990, 1993 4.\" The Regents of the University of California. All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. All advertising materials mentioning features or use of this software 15.\" must display the following acknowledgement: 16.\" This product includes software developed by the University of 17.\" California, Berkeley and its contributors. 18.\" 4. Neither the name of the University nor the names of its contributors 19.\" may be used to endorse or promote products derived from this software 20.\" without specific prior written permission. 21.\" 22.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32.\" SUCH DAMAGE. 33.\" 34.\" @(#)lock.1 8.1 (Berkeley) 6/6/93 35.\" 36.Dd June 6, 1993 37.Dt LOCK 1 38.Os 39.Sh NAME 40.Nm lock 41.Nd reserve a terminal 42.Sh SYNOPSIS 43.Nm lock 44.Op Fl p 45.Op Fl t Ar timeout 46.Sh DESCRIPTION 47.Nm Lock 48requests a password from the user, reads it again for verification 49and then will normally not relinquish the terminal until the password is 50repeated. 51There are two other conditions under which it will terminate: it 52will timeout after some interval of time and it may be killed by someone 53with the appropriate permission. 54.Pp 55Options: 56.Pp 57.Bl -tag -width Fl 58.It Fl p 59A password is not requested, instead the user's current login password 60is used. 61If the user has an S/Key key, they may also use it 62to unlock the terminal. To do this the user should enter "s/key" 63at the unlock "Key:" prompt. The user will then be issued an S/Key 64challange to which they may respond with a six-word S/Key one-time 65password. 66.It Fl t Ar timeout 67The time limit (default 15 minutes) is changed to 68.Ar timeout 69minutes. 70.El 71.Sh SEE ALSO 72.Xr skey 1 73.Sh HISTORY 74The 75.Nm lock 76command appeared in 77.Bx 3.0 . 78