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

[Sven Barth]

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(a)reactos.org [mailto:[e-mail]] On
>  Behalf Of Sven Barth
>  Sent: Thursday, 7 April 2011 5:10 AM
>  To: ros-dev(a)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-api
> >  -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(a)reactos.org [mailto:[e-mail]]
> >  On Behalf Of Sven Barth
> >  Sent: Thursday, 7 April 2011 4:05 AM
> >  To: ros-dev(a)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(a)reactos.org
> > > [mailto:[e-mail]]
> > > On Behalf Of Sven Barth
> > > Sent: Wednesday, 6 April 2011 8:54 PM
> > > To: ros-dev(a)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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> > > Ros-dev(a)reactos.org
> > > http://www.reactos.org/mailman/listinfo/ros-dev
> > >   
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