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jexec.8
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jexec.c
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Editing: jexec.8
.\" .\" Copyright (c) 2003 Mike Barcroft <mike@FreeBSD.org> .\" All rights reserved. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE .\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" .\" $FreeBSD$ .\" .Dd April 24, 2016 .Dt JEXEC 8 .Os .Sh NAME .Nm jexec .Nd "execute a command inside an existing jail" .Sh SYNOPSIS .Nm .Op Fl l .Op Fl u Ar username | Fl U Ar username .Ar jail Op Ar command ... .Sh DESCRIPTION The .Nm utility executes .Ar command inside the .Ar jail identified by its jid or name. If .Ar command is not specified then the user's shell is used. .Pp The following options are available: .Bl -tag -width indent .It Fl l Execute in a clean environment. The environment is discarded except for .Ev HOME , SHELL , TERM , USER , and anything from the login class capability database for the user. .It Fl u Ar username The user name from host environment as whom the .Ar command should run. This is the default. .It Fl U Ar username The user name from jailed environment as whom the .Ar command should run. .El .Sh SEE ALSO .Xr jail_attach 2 , .Xr jail 8 , .Xr jls 8 .Sh HISTORY The .Nm utility was added in .Fx 5.1 . .Sh BUGS If the jail is not identified by .Ar jid there is a possible race in between the lookup of the jail and executing the command inside the jail. Giving a .Ar jid has a similar race as another process can stop the jail and start another one after the user looked up the .Ar jid .
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