1.\" 2.\" Copyright (c) 2003 Mike Barcroft <mike@FreeBSD.org> 3.\" All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright 9.\" notice, this list of conditions and the following disclaimer. 10.\" 2. Redistributions in binary form must reproduce the above copyright 11.\" notice, this list of conditions and the following disclaimer in the 12.\" documentation and/or other materials provided with the distribution. 13.\" 14.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24.\" SUCH DAMAGE. 25.\" 26.\" $FreeBSD$ 27.\" 28.Dd May 27, 2009 29.Dt JEXEC 8 30.Os 31.Sh NAME 32.Nm jexec 33.Nd "execute a command inside an existing jail" 34.Sh SYNOPSIS 35.Nm 36.Op Fl u Ar username | Fl U Ar username 37.Ar jail command ... 38.Sh DESCRIPTION 39The 40.Nm 41utility executes 42.Ar command 43inside the 44.Ar jail 45identified by its jid or name. 46.Pp 47The following options are available: 48.Bl -tag -width indent 49.It Fl u Ar username 50The user name from host environment as whom the 51.Ar command 52should run. 53.It Fl U Ar username 54The user name from jailed environment as whom the 55.Ar command 56should run. 57.El 58.Sh SEE ALSO 59.Xr jail_attach 2 , 60.Xr jail 8 , 61.Xr jls 8 62.Sh HISTORY 63The 64.Nm 65utility was added in 66.Fx 5.1 . 67.Sh BUGS 68If the jail is not identified by 69.Ar jid 70there is a possible race in between the lookup of the jail 71and executing the command inside the jail. 72Giving a 73.Ar jid 74has a similar race as another process can stop the jail and 75start another one after the user looked up the 76.Ar jid . 77