question : any difference between "echo xxx > /dev/console" and printk

question : any difference between "echo xxx > /dev/console" and printk

[Tomko]

Hi all,

as topic, do anyone know is there any difference between them ? by the 
way, console should only output but not input , but i could still see 
something when i type " cat /dev/console"  in one terminal then type 
something at the tty where i open the console.  Can anyone tell me why?


Regards,
TOM

Re: question : any difference between "echo xxx > /dev/console" and printk

[linux-os (Dick Johnson)]

On Sun, 14 Aug 2005, Tomko wrote:

> Hi all,
>
> as topic, do anyone know is there any difference between them ? by the
> way, console should only output but not input , but i could still see
> something when i type " cat /dev/console"  in one terminal then type
> something at the tty where i open the console.  Can anyone tell me why?
>
>
> Regards,
> TOM
> -

/dev/console is a virtual terminal just like /dev/tty*. It really
has nothing to do with "printk" in the kernel (really). It's
just one of the many places where things "printed" in the kernel
can be displayed.

And, yes, the console is a two-way terminal emulator. It is the
standard-input, standard-output, and standard-error, for the
init process. Normally init doesn't respond to any input from
the console, but during boot it does so that you can try to
fix various errors.

Cheers,
Dick Johnson
Penguin : Linux version 2.6.12 on an i686 machine (5537.79 BogoMips).
Warning : 98.36% of all statistics are fiction.
.
I apologize for the following. I tried to kill it with the above dot :

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