[ros-dev] Advice required on User-mode to Kernel mode call for syslog(2) analog in ROS

Thu Apr 7 07:41:03 UTC 2011

Am 07.04.2011 09:37, schrieb dmex:
> It was 2am and I was being 'trolled'/abused for my lack of enthusiasm and
> support for Linux, I regret it spilled over in my reply for a completely
> different subject.
>
> I'm pacifist and it was by no means supposed to be harsh and should not have
> been directed at others about an unrelated subject.
>

No harm was done.

As said: I didn't even notice it :P

Regards,
Sven

> -----Original Message-----
> From: ros-dev-bounces at reactos.org [mailto:ros-dev-bounces at reactos.org] On
> Behalf Of Sven Barth
> Sent: Thursday, 7 April 2011 3:14 PM
> To: ros-dev at reactos.org
> Subject: Re: [ros-dev] Advice required on User-mode to Kernel mode call for
> syslog(2) analog in ROS
>
> Am 06.04.2011 23:20, schrieb dmex:
>> -And that's why I suggested a device driver... so one can add once own
>> "extensions" without sacrificing compatibility :)
>>
>> That could work, It could read or write the 'DBWIN_BUFFER' file and
>> allow a replacement driver to support outputs using other methods.
>>
>> I also apologize for my last e-mail, It was very harsh, totally
>> unwarranted and uncalled for.
>>
>
> Seems like your "harshness" didn't come along as you "wanted" it to...
> Or perhaps I was to tired to recognize that it was meant in a harsh way...
> ^^
>
> Regards,
> Sven
>
>> -----Original Message-----
>> From: ros-dev-bounces at reactos.org [mailto:ros-dev-bounces at reactos.org]
>> On Behalf Of Sven Barth
>> Sent: Thursday, 7 April 2011 5:10 AM
>> To: ros-dev at reactos.org
>> Subject: Re: [ros-dev] Advice required on User-mode to Kernel mode
>> call for
>> syslog(2) analog in ROS
>>
>> On 06.04.2011 22:53, dmex wrote:
>>> DebugPring/OutputDebugString would be a good place to start learning
>>> how Windows outputs kernel messages ;)
>>> http://sumeshvv.wordpress.com/2010/12/02/how-the-outputdebugstring-ap
>>> i
>>> -works
>>> /
>>>
>>> ReactOS OutputDebugString Source:
>>> http://doxygen.reactos.org/da/def/dll_2win32_2kernel32_2debug_2output
>>> _
>>> 8c_a94
>>> 90feb381d7062ca6e5a28bdeacd6d2.html
>>>
>>
>> I'll put that on my todo list once I have a few minutes :D
>>
>>> Minas's idea is terrible in my opinion, "Do we need special system
>>> call like Linux, or even more, the whole family of them (sysctl('*'))
>>> as in BSD?" as ReactOS is designed for binary compatibility with
>>> Windows, Not BSD or Linux and it should stay that way.
>>>
>>
>> And that's why I suggested a device driver... so one can add once own
>> "extensions" without sacrificing compatibility :)
>>
>>> -----Original Message-----
>>> From: ros-dev-bounces at reactos.org
>>> [mailto:ros-dev-bounces at reactos.org]
>>> On Behalf Of Sven Barth
>>> Sent: Thursday, 7 April 2011 4:05 AM
>>> To: ros-dev at reactos.org
>>> Subject: Re: [ros-dev] Advice required on User-mode to Kernel mode
>>> call for
>>> syslog(2) analog in ROS
>>>
>>> On 06.04.2011 21:26, dmex wrote:
>>>> What's wrong with current method of using the memory mapped
>> 'DBWIN_BUFFER'
>>>> file for outputting kernel messages?
>>>>
>>>
>>> That I didn't know about it :P
>>>
>>>> Two or three different kernel implementations for the same thing
>>>> seems a bit retarded and breaks compatibility with existing
>>>> applications like
>>> Dbgview.
>>>>
>>>
>>> I'm just looking at the source of ReactOS from time to time when I
>>> have the need to check out how a certain function behaves under the
>>> hood (especially while I ported the Free Pascal compiler to the
>>> Native NT API), but I weren't yet aware how those debug outputs work.
>>> As Minas mentioned that he'd like to add a syscall/API function
>>> compareable to syslog I just thought that it would be wiser (from my
>>> restricted point of
>>> view) to write a driver for this that would allow to extend the
>>> system dynamically.
>>>
>>> Regards,
>>> Sven
>>>
>>>> -----Original Message-----
>>>> From: ros-dev-bounces at reactos.org
>>>> [mailto:ros-dev-bounces at reactos.org]
>>>> On Behalf Of Sven Barth
>>>> Sent: Wednesday, 6 April 2011 8:54 PM
>>>> To: ros-dev at reactos.org
>>>> Subject: Re: [ros-dev] Advice required on User-mode to Kernel mode
>>>> call for
>>>> syslog(2) analog in ROS
>>>>
>>>> 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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