ps Patch with FreeBSD Jail Support

Here's a patch to the ps command included with FreeBSD. This patch adds two command line options to ps to support listing processes within jails:

-J jailname: List only processes belonging to jailname
-H: List only processes belonging to the host system.

Notes:

• On FreeBSD 5.1 and later jailutils include a jps command which should be used instead of this patch.
• The /proc file system is used, so you must have that mounted.
• If you don't know what you're doing patching your system can be dangerous.
• Usually jails only run daemons. Make sure to use the -xa options along with -J.
• I haven't used extensively the 5.0 patch, but cursory testing indicates it works fine.

Here's a quick install and patch, which keeps the previous ps binaries, etc... Use psj instead for the patched version.

# cd /usr/src
# patch < /path/to/patch/psj.x.x.patch
# cd bin/ps
# make
# cd /usr/obj/usr/src/bin/ps/
# cp ps /bin/psj
# cp ps.1.gz /usr/share/man/man1/psj.1.gz

Download:

Source:
psj.5.0.patch (for FreeBSD 5.0)
psj.4.7.patch (for FreeBSD 4.7)
psj.4.6.patch (for FreeBSD 4.6)
psj.4.5.patch (for FreeBSD 4.5)

Licensing and Support

See license. Contact me when bugs are found.

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