1.\" $OpenBSD: lock.1,v 1.20 2019/07/24 20:23:09 schwarze 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. Neither the name of the University nor the names of its contributors 15.\" may be used to endorse or promote products derived from this software 16.\" without specific prior written permission. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28.\" SUCH DAMAGE. 29.\" 30.\" @(#)lock.1 8.1 (Berkeley) 6/6/93 31.\" 32.Dd $Mdocdate: July 24 2019 $ 33.Dt LOCK 1 34.Os 35.Sh NAME 36.Nm lock 37.Nd reserve a terminal 38.Sh SYNOPSIS 39.Nm lock 40.Op Fl np 41.Op Fl a Ar style 42.Op Fl t Ar timeout 43.Sh DESCRIPTION 44.Nm 45requests a password from the user, reads it again for verification 46and then will normally not relinquish the terminal until the password is 47repeated. 48.Pp 49The options are as follows: 50.Bl -tag -width Ds 51.It Fl a Ar style 52The specified 53.Bx 54Authentication login 55.Ar style 56(as specified in 57.Pa /etc/login.conf ) 58will be used to authenticate the user. 59If the particular 60.Ar style 61requires a challenge/response handshake or a special prompt, the 62user may enter the name of the 63.Ar style 64to get the standard prompt for that 65.Ar style . 66.It Fl n 67Lock the terminal forever. 68This overrides 69.Fl t 70and is the default on 71.Ox 72unless 73.Fl t 74is specified. 75.It Fl p 76A password is not requested, instead the user's current login password 77is used. 78If the user has an S/Key key, they may also use it to unlock the terminal. 79To do this the user should enter 80.Qq s/key 81at the unlock 82.Dq Key: 83prompt. 84The user will then be issued an S/Key 85challenge to which they may respond with a six-word S/Key one-time 86password. 87.It Fl t Ar timeout 88Unlock the terminal after 89.Ar timeout 90minutes unless 91.Fl n 92is also specified. 93When used in this manner 94.Nm 95should be invoked so that the user is safely logged out 96if the timeout elapses: 97.Pp 98.Dl $ lock -t 15 || exit 99.El 100.Sh SEE ALSO 101.Xr skey 1 , 102.Xr login.conf 5 103.Sh HISTORY 104The 105.Nm 106command first appeared in 107.Bx 2 . 108.Sh AUTHORS 109.An Kurt Shoens . 110