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 November 29, 2008 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.Op Fl n Ar jailname 38.Ar jid command ... 39.Sh DESCRIPTION 40The 41.Nm 42utility executes 43.Ar command 44inside the jail identified by either 45.Ar jailname 46or 47.Ar jid 48or both. 49.Pp 50If the jail cannot be identified uniquely by the given parameters, 51an error message is printed. 52.Nm 53will also check the state of the jail (once supported) to be 54.Dv ALIVE 55and ignore jails in other states. 56The mandatory argument 57.Ar jid 58is the unique jail identifier as given by 59.Xr jls 8 . 60In case you only want to match on other criteria, give an empty string. 61.Pp 62The following options are available: 63.Bl -tag -width indent 64.It Fl n Ar jailname 65The name of the jail, if given upon creation of the jail. 66This is not the hostname of the jail. 67.It Fl u Ar username 68The user name from host environment as whom the 69.Ar command 70should run. 71.It Fl U Ar username 72The user name from jailed environment as whom the 73.Ar command 74should run. 75.El 76.Sh SEE ALSO 77.Xr jail_attach 2 , 78.Xr jail 8 , 79.Xr jls 8 80.Sh HISTORY 81The 82.Nm 83utility was added in 84.Fx 5.1 . 85.Sh BUGS 86If the jail is not identified by 87.Ar jid 88there is a possible race in between the lookup of the jail 89and executing the command inside the jail. 90Giving a 91.Ar jid 92has a similar race as another process can stop the jail and 93start another one after the user looked up the 94.Ar jid . 95