1994-05-27 12:33:43 +00:00
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.\" Copyright (c) 1987, 1990, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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2017-02-28 23:42:47 +00:00
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.\" 3. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)lock.1 8.1 (Berkeley) 6/6/93
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1999-08-28 01:08:13 +00:00
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.\" $FreeBSD$
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1994-05-27 12:33:43 +00:00
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.\"
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2020-12-11 19:27:21 +00:00
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.Dd December 11, 2020
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1994-05-27 12:33:43 +00:00
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.Dt LOCK 1
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.Os
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.Sh NAME
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.Nm lock
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.Nd reserve a terminal
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.Sh SYNOPSIS
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2000-11-20 19:21:22 +00:00
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.Nm
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2002-07-28 07:13:53 +00:00
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.Op Fl npv
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1994-05-27 12:33:43 +00:00
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.Op Fl t Ar timeout
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.Sh DESCRIPTION
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2002-04-20 12:18:28 +00:00
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The
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.Nm
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utility requests a password from the user, reads it again for verification
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1994-05-27 12:33:43 +00:00
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and then will normally not relinquish the terminal until the password is
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repeated.
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There are two other conditions under which it will terminate: it
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will timeout after some interval of time and it may be killed by someone
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with the appropriate permission.
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.Pp
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2003-06-09 19:32:02 +00:00
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The following options are available:
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.Bl -tag -width indent
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1996-09-14 09:00:52 +00:00
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.It Fl n
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2005-02-13 22:25:33 +00:00
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Do not use a timeout value.
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2004-07-02 22:22:35 +00:00
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Terminal will be locked forever.
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1994-05-27 12:33:43 +00:00
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.It Fl p
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A password is not requested, instead the user's current login password
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is used.
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2001-07-15 08:06:20 +00:00
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.It Fl t Ar timeout
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1994-05-27 12:33:43 +00:00
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The time limit (default 15 minutes) is changed to
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.Ar timeout
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minutes.
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2002-07-28 07:13:53 +00:00
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.It Fl v
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Disable switching virtual terminals while this terminal is locked.
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This option is implemented in a way similar to the
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.Fl S
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option of
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.Xr vidcontrol 1 ,
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2003-02-27 18:25:26 +00:00
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and thus has the same restrictions.
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It is only available if the terminal in question is a
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2002-07-28 07:13:53 +00:00
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.Xr syscons 4
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2014-08-26 10:55:08 +00:00
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or
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.Xr vt 4
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2002-07-28 07:13:53 +00:00
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virtual terminal.
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1994-05-27 12:33:43 +00:00
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.El
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2020-12-11 19:27:21 +00:00
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.Sh EXAMPLES
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Lock the terminal for 5 minutes, disable switching virtual terminals and
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require the user's login password to unlock:
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.Pp
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.Dl $ lock -p -t 5 -v
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2003-02-27 18:25:26 +00:00
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.Sh SEE ALSO
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.Xr vidcontrol 1 ,
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2014-08-26 11:04:51 +00:00
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.Xr syscons 4 ,
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2014-08-26 10:55:08 +00:00
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.Xr vt 4
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1994-05-27 12:33:43 +00:00
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.Sh HISTORY
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The
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2000-11-20 19:21:22 +00:00
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.Nm
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1994-05-27 12:33:43 +00:00
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command appeared in
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.Bx 3.0 .
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