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SubjectRe: [CFT] Grep to find users of sys_sysctl.
Date
Jakub Jelinek <jakub@redhat.com> writes:

> This assumes the binaries and/or libraries are not stripped, and they
> usually are stripped. So, it is better to run something like:
> find / -type f -perm /111 | while read f; do readelf -Ws $f 2>/dev/null | fgrep
> -q sysctl@GLIBC && echo $f; done

Russell King <rmk+lkml@arm.linux.org.uk> writes:
> glibc on ARM _requires_ sys_sysctl for userspace ioperm, inb, outb etc
> emulation.


It looks like we have a small but interesting set of sysctl users.

The list of files below is a composite from a number of systems I have
access to, and the reply I have gotten so far. I'm still hoping to hear
from other people so I can add some other users of sysctl to my list.

I'm still investigating to see how all of these pieces are using
sysctl, and how much they care:
- radvd seems to be an upstanding user.
- libsensors seems to be using sysctls so we have no responsibility to
maintain the ABI there.
- libpthread uses sysctl but it doesn't much care.
- module_upgrade seems to be setting the printk verbosity?

The nvidia-installer sounds like a scary piece of code.

I'm puzzled why the majority of the users seem to be concentrated
in system configuration software and installers.

These


Compiling the results I have so far (Some of these are from older distros):
/sbin/kmodule
/sbin/sndconfig
/usr/X11R6/bin/Xconfigurator
/usr/bin/tiny-nvidia-installer
/usr/bin/nvidia-installer
/usr/sbin/glidelink
/usr/sbin/kudzu
/usr/sbin/module_upgrade
/usr/sbin/mouseconfig
/usr/sbin/radvd
/usr/sbin/updfstab

/usr/lib/libsensors.so.1.2.1
/usr/lib/libsensors.so.3.1.0
/usr/lib/libsensors.so.3.0.9
/usr/lib64/libsensors.so.2.0.0
/usr/lib64/libsensors.so.3.0.9

/usr/lib/python1.5/site-packages/_kudzumodule.so
/usr/lib/python2.2/site-packages/_kudzumodule.so
/usr/lib/python2.3/site-packages/_kudzumodule.so
/usr/lib64/python2.4/site-packages/_kudzumodule.so

/lib/i686/libpthread-0.10.so
/lib/i686/libpthread.so.0
/lib/i686/nosegneg/libpthread-2.4.so
/lib/libpthread-0.10.so
/lib/libpthread-0.9.so
/lib/libpthread.so.0
/lib/tls/libpthread-2.3.3.so
/lib/tls/libpthread-2.3.5.so
/lib/tls/libpthread-2.3.6.so
/lib/tls/libpthread.so.0
/lib/libpthread-2.4.so
/lib64/libpthread.so.0
/lib64/tls/libpthread.so.0
/lib64/libpthread-2.4.so
/usr/i386-glibc22-linux/lib/libpthread-0.9.so
/usr/i386-glibc22-linux/lib/libpthread.so.0


Eric
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