This allows the parent jail to retrieve or set kernel state when child
does not have sysctl(8) installed (e.g. light weighted OCI containers
or slim jails).
This is especially useful when manipulating jail prison or vnet sysctls.
For example, `sysctl -j foo -Ja` or `sysctl -j foo net.fibs=2`.
Reviewed by: dfr (previous version), markj
MFC after: 1 week
Relnotes: yes
Differential Revision: https://reviews.freebsd.org/D48618
(cherry picked from commit 08aa7128dea4d14811ae4a0225d7c678869cfe62)
I forgot to update the usage() and SYNOPSIS section of man page when
adding the two options -J and -V.
While here, fix the options sort order in SYNOPSIS section.
Fixes: 5ec83c660aca sysctl: Add flags to filter jail prison and vnet variables
MFC after: 1 day
(cherry picked from commit 0ee3e29e1d9ee3ed22441c0d580d2d1e57a1d9e3)
So users do not have to contact the source code to tell whether a
variable is a jail prison / vnet one or not.
Reviewed by: cy (previous version), markj, jamie (for #jails)
MFC after: 2 weeks
Relnotes: yes
Differential Revision: https://reviews.freebsd.org/D47107
(cherry picked from commit 5ec83c660acaf30c1d6b9417dbd8c80dfa9d56ac)
+ while here, fix alignment and tag SPDX
MFC after: 3 days
Reviewed by: imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/1421
(cherry picked from commit 2a680c5c37ea020467fce545734afea019d3a3ea)
Also add a test to ensure that it is working correctly.
Submitted by: ota_j.email.ne.jp
Reviewed by: mckusick
Differential Revision: https://reviews.freebsd.org/D34012
-n omits the name of the variable regardless of the type of information that is
requested. Rephrase to clarify this point.
PR: 242191
Submitted by: stilezy@gmail.com
Approved by: emaste@
Differential Revision: https://reviews.freebsd.org/D26149
Most sysctl nodes only return a single value, but some nodes return an
array of values (e.g. kern.cp_time). sysctl(8) understand how to display
the values of a node that returns multiple values (it prints out each
numeric value separated by spaces). However, until now sysctl(8) has
only been able to set sysctl nodes to a single value. This change
allows sysctl to accept a new value for a numeric sysctl node that contains
multiple values separated by either spaces or commas. sysctl(8) parses
this list into an array of values and passes the array as the "new" value
to sysctl(2).
Reviewed by: rpokala
MFC after: 1 week
Sponsored by: Chelsio Communications
Differential Revision: https://reviews.freebsd.org/D14569
Renumber cluase 4 to 3, per what everybody else did when BSD granted
them permission to remove clause 3. My insistance on keeping the same
numbering for legal reasons is too pedantic, so give up on that point.
Submitted by: Jan Schaumann <jschauma@stevens.edu>
Pull Request: https://github.com/freebsd/freebsd/pull/96
sysctl... This is useful for kern.arandom which (without -B) will
happily return 0 bytes, which isn't too useful or random...
fix spelling (thanks igor!) of settable while I'm here...
Add the following flags to sysctl:
-W - show only writable sysctls
-T - show only tuneable sysctls
This can be used to create a /var/run/sysctl.boot to
compare set tunables versus booted tunables.
Sponsored by: iXsystems
retrieving individual OIDs. This allows the same list of OIDs to be
passed to sysctl(8) across different systems where particular OIDs may not
exist, and still get as much information as possible from them.
PR: bin/123644
Submitted by: dhw
Approved by: ed (mentor)
MFC after: 2 weeks
This commit includes the following core components:
* sample configuration file for sensorsd
* rc(8) script and glue code for sensorsd(8)
* sysctl(3) doc fixes for CTL_HW tree
* sysctl(3) documentation for hardware sensors
* sysctl(8) documentation for hardware sensors
* support for the sensor structure for sysctl(8)
* rc.conf(5) documentation for starting sensorsd(8)
* sensor_attach(9) et al documentation
* /sys/kern/kern_sensors.c
o sensor_attach(9) API for drivers to register ksensors
o sensor_task_register(9) API for the update task
o sysctl(3) glue code
o hw.sensors shadow tree for sysctl(8) internal magic
* <sys/sensors.h>
* HW_SENSORS definition for <sys/sysctl.h>
* sensors display for systat(1), including documentation
* sensorsd(8) and all applicable documentation
The userland part of the framework is entirely source-code
compatible with OpenBSD 4.1, 4.2 and -current as of today.
All sensor readings can be viewed with `sysctl hw.sensors`,
monitored in semi-realtime with `systat -sensors` and also
logged with `sensorsd`.
Submitted by: Constantine A. Murenin <cnst@FreeBSD.org>
Sponsored by: Google Summer of Code 2007 (GSoC2007/cnst-sensors)
Mentored by: syrinx
Tested by: many
OKed by: kensmith
Obtained from: OpenBSD (parts)
by Sheldon.
For a detailed description look at the commit log for sysctl.c
rev.1.42 -- i do not think it is appropriate to put the full
description in this manpage, and the "boot" and "loader" manpages
where this description might go are also missing a description of
a number of similar variables, so i think this it is ok to limit
documentation to this now, and update it later when I (or someone
else) have a chance to revise "boot" and "loader".
