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Ryan Moeller 66005c453d jail: Add exec.prepare and exec.release command hooks
This change introduces new jail command hooks that run before and after any
other actions.

The exec.prepare hook can be used for example to invoke a script that checks
if the jail's root exists, creating it if it does not. Since arbitrary
variables in jail.conf can be passed to the command, it can be pretty useful
for templating jails.

An example use case for exec.release would be to remove the filesystem of an
ephemeral jail.

The names "prepare" and "release" are borrowed from the names of similar hooks
in libvirt.

Reviewed by:	jamie, manpages, mmacy
Approved by:	mmacy (mentor)
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D24829
2020-05-14 23:38:11 +00:00
bin sh/tests: Test some obscure cases with aliasing keywords 2020-05-12 21:59:21 +00:00
cddl zfs allow/unallow should work with numeric uid/gid 2020-05-12 09:04:57 +00:00
contrib Import lib9p 7ddb1164407da19b9b1afb83df83ae65a71a9a66. 2020-05-14 19:57:52 +00:00
crypto Merge OpenSSL 1.1.1g. 2020-04-21 19:38:32 +00:00
etc Introduce nexthop objects and new routing KPI. 2020-04-12 14:30:00 +00:00
gnu binutils: disconnect objdump from the build 2020-05-06 18:38:40 +00:00
include Add memalign(3), mostly for glibc compatibility. 2020-05-14 21:12:08 +00:00
kerberos5
lib Add memalign(3), mostly for glibc compatibility. 2020-05-14 21:12:08 +00:00
libexec Remove tests for obsolete compilers in the build system 2020-05-12 15:22:40 +00:00
release Set use_nvd=0 in EC2 AMIs. 2020-04-27 21:44:02 +00:00
rescue rescue: Remove useless linking with libl 2020-03-24 07:08:02 +00:00
sbin Don't send clear screen until we are committed to run. 2020-05-09 10:55:34 +00:00
secure Merge OpenSSL 1.1.1g. 2020-04-21 19:38:32 +00:00
share Add new stats(7) man page and hook it up to the build. 2020-05-14 09:18:50 +00:00
stand Remove tests for obsolete compilers in the build system 2020-05-12 15:22:40 +00:00
sys Hide host CPUID 0x15 TSC/Crystal ratio/freq info from guest 2020-05-14 22:18:12 +00:00
targets retire in-tree GPL dtc devicetree compiler 2020-02-29 17:10:54 +00:00
tests pf tests: fix up a couple WARNS= 6 nits 2020-05-14 23:20:58 +00:00
tools [ath] Extend the colours to 4, not 2. 2020-05-14 05:01:18 +00:00
usr.bin Refine the history of uname. It appeared in 4.4BSD. It was not in v7 unix. It 2020-05-12 22:44:51 +00:00
usr.sbin jail: Add exec.prepare and exec.release command hooks 2020-05-14 23:38:11 +00:00
.arcconfig
.arclint
.cirrus.yml
.clang-format
.gitattributes
.gitignore Import the kyua testing framework for infrastructure software 2020-03-17 16:56:50 +00:00
COPYRIGHT
LOCKS
MAINTAINERS
Makefile Use universe-toolchain config(8) 2020-04-29 02:18:39 +00:00
Makefile.inc1 buildworld: add back in missing semicolon 2020-05-10 20:28:38 +00:00
Makefile.libcompat Stop building libl and liby 2020-03-26 08:23:09 +00:00
Makefile.sys.inc
ObsoleteFiles.inc ObsoleteFiles.inc: use date (not xxxx) for ubsec removal 2020-05-14 17:19:07 +00:00
README
README.md Import the kyua testing framework for infrastructure software 2020-03-17 16:56:50 +00:00
RELNOTES Document removal of deprecated algorithms from OCF. 2020-05-11 22:15:46 +00:00
UPDATING UPDATING: Fix the date of the closefrom(2) entry 2020-04-24 12:57:03 +00:00

FreeBSD Source:

This is the top level of the FreeBSD source directory. This file was last revised on: FreeBSD

FreeBSD is an operating system used to power modern servers, desktops, and embedded platforms. A large community has continually developed it for more than thirty years. Its advanced networking, security, and storage features have made FreeBSD the platform of choice for many of the busiest web sites and most pervasive embedded networking and storage devices.

For copyright information, please see the file COPYRIGHT in this directory. Additional copyright information also exists for some sources in this tree - please see the specific source directories for more information.

The Makefile in this directory supports a number of targets for building components (or all) of the FreeBSD source tree. See build(7), config(8), https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/makeworld.html, and https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig.html for more information, including setting make(1) variables.

Source Roadmap:

bin		System/user commands.

cddl		Various commands and libraries under the Common Development
		and Distribution License.

contrib		Packages contributed by 3rd parties.

crypto		Cryptography stuff (see crypto/README).

etc		Template files for /etc.

gnu		Various commands and libraries under the GNU Public License.
		Please see gnu/COPYING* for more information.

include		System include files.

kerberos5	Kerberos5 (Heimdal) package.

lib		System libraries.

libexec		System daemons.

release		Release building Makefile & associated tools.

rescue		Build system for statically linked /rescue utilities.

sbin		System commands.

secure		Cryptographic libraries and commands.

share		Shared resources.

stand		Boot loader sources.

sys		Kernel sources.

sys/<arch>/conf Kernel configuration files. GENERIC is the configuration
		used in release builds. NOTES contains documentation of
		all possible entries.

tests		Regression tests which can be run by Kyua.  See tests/README
		for additional information.

tools		Utilities for regression testing and miscellaneous tasks.

usr.bin		User commands.

usr.sbin	System administration commands.

For information on synchronizing your source tree with one or more of the FreeBSD Project's development branches, please see:

https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/current-stable.html