Am 06.04.2011 02:09, schrieb Minas Abrahamyan:
Hi all,

I'm going to implement dmesg.exe, a ROS application to read dmesg/kmsg
buffer (debug messages in kernel buffer),
which is filled in by appropriate patch 6018
(here: http://www.reactos.org/bugzilla/show_bug.cgi?id=6018 ) (BTW,
it's not yet reviewed and not applied!).

So I'm requesting advice on:
What would be the better way for user-mode code to get the contents of
kmsg buffer in kernel-space (kdbg)?

Shortly:
Linux has special system call "syslog" (man 2 syslog)
FreeBSD uses its special sysctl interface to kernel along with
'kern.msgbuf' parameter.

My questions:
Do we need special system call like Linux, or even more, the whole
family of them (sysctl('*')) as in BSD?
How to implement simple system call for it, now?

I'm not one of the ReactOS devs and also I'm not writing much here, but what about implementing a (legacy type) device driver that provides a device object (e.g. \Device\kmsg) that can be read from (no writing though) and some code for DeviceIOControl to clear/config the buffer?

Regards,
Sven

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