linux-kernel - Re: query related to serial console

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Message-ID: <288311.57722.qm@web7706.mail.in.yahoo.com>
Date:	Thu, 18 Jan 2007 10:10:56 +0000 (GMT)
From:	Seetharam Dharmosoth <seetharam_kernel@...oo.co.in>
To:	Russell King <rmk+lkml@....linux.org.uk>
Cc:	randy.dunlap@...cle.com, linux-kernel@...r.kernel.org
Subject: Re: query related to serial console



--- Russell King <rmk+lkml@....linux.org.uk> wrote:

> On Thu, Jan 18, 2007 at 05:39:15AM +0000, Seetharam
> Dharmosoth wrote:
> > I have one doubt in this regard.
> > 1) once we connected to the serial console we
> don't
> >    want to login into the shell.
> >    (without login into the shell we want to fire
> the
> >    sysrq command like b, r m, etc.)
> > 
> >  for this I am doing like 
> >   grabing the serial console then
> >   doing ctrl+]
> >   so that getting 
> >               telnet> 
> > now i want to give command like b, m ,r etc.
> > 
> > but it is not accepting my commands until I do 
> > telnet> send brk
> > 
> > can you please explain me why like this behavior ?
> 
> If it didn't require a break before hand, merely
> pressing 'b', 'm' or 'r'
> would trigger the sysrq command, which would make it
> absolutely impossible
> to login or type any normal command containing those
> characters.
> 
> -- 
> Russell King
>  Linux kernel    2.6 ARM Linux   -
> http://www.arm.linux.org.uk/
>  maintainer of:
> 
Thanks.

I am not able to find the code path for 
'send brk'

can you please let me know what would be the code path
when we do 'send brk' in linux.

I am interested about 8250 and uart serial driver.

currently using kernel 2.6.7.

Thanks
Seetharam


		
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