> I have RHEL ES 5 (fully updated) running on a server, and I have found two
> files on it that have unusual file permissions:

> --------wx 1 root root 4096 Jan 22 2131
> /sys/module/sbs/paramaters/capacity_mode
> --------w- 1 root root 4096 Jan 22 2131
> /sys/module/sbs/paramaters/update_mode

Err, is this a typo? - they should be in sbs/parameters/...

> Could someone tell me how to figure out what these files do, and why they
> have such uneven file permissions (i.e. world write, but not owner or group
> write)?

What they do: dunno, however they are related to the Smart Battery System
(sbs) which is an ACPI feature that's used to monitor some laptop batteries.

https://sourceforge.net/projects/sbs-linux/

As to why they have strange permissions... do you have the sbs driver listed
in your lsmod output?

A random RHEL5 server I picked shows this:

[sam@(protected)/
total 0
--------wx 1 root root 4096 Jan 28 20:23 capacity_mode
--------w- 1 root root 4096 Jan 28 20:23 update_mode
----rwxr-- 1 root root 4096 Jan 28 20:23 update_time

Yet this laptop, which is funning Fedora 8, those files don't even exist until
I load sbs.ko at which point they look like this:

[sjs298@(protected)/
total 0
-r--r--r-- 1 root root 4096 2008-01-28 19:59 capacity_mode
-rw-r--r-- 1 root root 4096 2008-01-28 19:59 update_time

The difference is that Fedora is using 2.6.23.9 whereas RHEL is using
2.6.18-53 - and SBS was only put in the kernel in 2.6.18 so possibly at this
point its /sys interfaces are immature.

--
Sam

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