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freebsd-skq/usr.sbin/jexec/jexec.8

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o Add jls(8) for listing active jails. o Add jexec(8) to execute a command in an existing jail. o Add -j option for killall(1) to kill all processes in a specified jail. o Add -i option to jail(8) to output jail ID of newly created jail.
2003-04-09 03:04:12 +00:00
.\"
.\" 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
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" $FreeBSD$
.\"
Define which of the username options (-u/-U) to jexec(8) is the default. Bump Dd. PR: 207587 Submitted by: dewayne@heuristicsystems.com.au MFC after: 3 days Sponsored by: Essen Hackathon 2016
2016-04-23 22:31:58 +00:00
.Dd April 24, 2016
o Add jls(8) for listing active jails. o Add jexec(8) to execute a command in an existing jail. o Add -j option for killall(1) to kill all processes in a specified jail. o Add -i option to jail(8) to output jail ID of newly created jail.
2003-04-09 03:04:12 +00:00
.Dt JEXEC 8
.Os
.Sh NAME
.Nm jexec
excute: typo; possible replacements: excite, excuse.
2003-05-31 18:24:40 +00:00
.Nd "execute a command inside an existing jail"
o Add jls(8) for listing active jails. o Add jexec(8) to execute a command in an existing jail. o Add -j option for killall(1) to kill all processes in a specified jail. o Add -i option to jail(8) to output jail ID of newly created jail.
2003-04-09 03:04:12 +00:00
.Sh SYNOPSIS
.Nm
Run a shell in the jail when no command is specified. Add a new flag, -l, for a clean environment, same as jail(8) exec.clean. Change the GET_USER_INFO macro into a function. PR: 201300 Submitted by: Willem Jan Withagen MFC after: 3 days
2015-07-12 17:03:50 +00:00
.Op Fl l
Add -u and -U which functions like the jail(8) that allow commands to be executed under a different credential. PR: bin/95777 Submitted by: clsung
2006-04-19 10:12:10 +00:00
.Op Fl u Ar username | Fl U Ar username
Run a shell in the jail when no command is specified. Add a new flag, -l, for a clean environment, same as jail(8) exec.clean. Change the GET_USER_INFO macro into a function. PR: 201300 Submitted by: Willem Jan Withagen MFC after: 3 days
2015-07-12 17:03:50 +00:00
.Ar jail Op Ar command ...
o Add jls(8) for listing active jails. o Add jexec(8) to execute a command in an existing jail. o Add -j option for killall(1) to kill all processes in a specified jail. o Add -i option to jail(8) to output jail ID of newly created jail.
2003-04-09 03:04:12 +00:00
.Sh DESCRIPTION
The
.Nm
excute: typo; possible replacements: excite, excuse.
2003-05-31 18:24:40 +00:00
utility executes
o Add jls(8) for listing active jails. o Add jexec(8) to execute a command in an existing jail. o Add -j option for killall(1) to kill all processes in a specified jail. o Add -i option to jail(8) to output jail ID of newly created jail.
2003-04-09 03:04:12 +00:00
.Ar command
Add support for the arbitrary named jail parameters used by jail_set(2) and jail_get(2). Jail(8) can now create jails using a "name=value" format instead of just specifying a limited set of fixed parameters; it can also modify parameters of existing jails. Jls(8) can display all parameters of jails, or a specified set of parameters. The available parameters are gathered from the kernel, and not hard-coded into these programs. Small patches on killall(1) and jexec(8) to support jail names with jail_get(2). Approved by: bz (mentor)
2009-05-27 14:30:26 +00:00
inside the
.Ar jail
identified by its jid or name.
Run a shell in the jail when no command is specified. Add a new flag, -l, for a clean environment, same as jail(8) exec.clean. Change the GET_USER_INFO macro into a function. PR: 201300 Submitted by: Willem Jan Withagen MFC after: 3 days
2015-07-12 17:03:50 +00:00
If
.Ar command
is not specified then the user's shell is used.
Add -u and -U which functions like the jail(8) that allow commands to be executed under a different credential. PR: bin/95777 Submitted by: clsung
2006-04-19 10:12:10 +00:00
.Pp
The following options are available:
.Bl -tag -width indent
Run a shell in the jail when no command is specified. Add a new flag, -l, for a clean environment, same as jail(8) exec.clean. Change the GET_USER_INFO macro into a function. PR: 201300 Submitted by: Willem Jan Withagen MFC after: 3 days
2015-07-12 17:03:50 +00:00
.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.
Add -u and -U which functions like the jail(8) that allow commands to be executed under a different credential. PR: bin/95777 Submitted by: clsung
2006-04-19 10:12:10 +00:00
.It Fl u Ar username
The user name from host environment as whom the
.Ar command
should run.
Define which of the username options (-u/-U) to jexec(8) is the default. Bump Dd. PR: 207587 Submitted by: dewayne@heuristicsystems.com.au MFC after: 3 days Sponsored by: Essen Hackathon 2016
2016-04-23 22:31:58 +00:00
This is the default.
Add -u and -U which functions like the jail(8) that allow commands to be executed under a different credential. PR: bin/95777 Submitted by: clsung
2006-04-19 10:12:10 +00:00
.It Fl U Ar username
The user name from jailed environment as whom the
.Ar command
should run.
Markup fixes.
2006-09-29 17:57:04 +00:00
.El
o Add jls(8) for listing active jails. o Add jexec(8) to execute a command in an existing jail. o Add -j option for killall(1) to kill all processes in a specified jail. o Add -i option to jail(8) to output jail ID of newly created jail.
2003-04-09 03:04:12 +00:00
.Sh SEE ALSO
.Xr jail_attach 2 ,
.Xr jail 8 ,
.Xr jls 8
.Sh HISTORY
The
.Nm
utility was added in
.Fx 5.1 .
MFp4: Bring in updated jail support from bz_jail branch. This enhances the current jail implementation to permit multiple addresses per jail. In addtion to IPv4, IPv6 is supported as well. Due to updated checks it is even possible to have jails without an IP address at all, which basically gives one a chroot with restricted process view, no networking,.. SCTP support was updated and supports IPv6 in jails as well. Cpuset support permits jails to be bound to specific processor sets after creation. Jails can have an unrestricted (no duplicate protection, etc.) name in addition to the hostname. The jail name cannot be changed from within a jail and is considered to be used for management purposes or as audit-token in the future. DDB 'show jails' command was added to aid debugging. Proper compat support permits 32bit jail binaries to be used on 64bit systems to manage jails. Also backward compatibility was preserved where possible: for jail v1 syscalls, as well as with user space management utilities. Both jail as well as prison version were updated for the new features. A gap was intentionally left as the intermediate versions had been used by various patches floating around the last years. Bump __FreeBSD_version for the afore mentioned and in kernel changes. Special thanks to: - Pawel Jakub Dawidek (pjd) for his multi-IPv4 patches and Olivier Houchard (cognet) for initial single-IPv6 patches. - Jeff Roberson (jeff) and Randall Stewart (rrs) for their help, ideas and review on cpuset and SCTP support. - Robert Watson (rwatson) for lots and lots of help, discussions, suggestions and review of most of the patch at various stages. - John Baldwin (jhb) for his help. - Simon L. Nielsen (simon) as early adopter testing changes on cluster machines as well as all the testers and people who provided feedback the last months on freebsd-jail and other channels. - My employer, CK Software GmbH, for the support so I could work on this. Reviewed by: (see above) MFC after: 3 months (this is just so that I get the mail) X-MFC Before: 7.2-RELEASE if possible
2008-11-29 14:32:14 +00:00
.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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