[uml-devel] Serial Line ioct and set_termios bypassing

[uml-devel] Serial Line ioct and set_termios bypassing

[tcappellari]

Hi,
I'm developing an application that I want to run inside UML system. This 
application use the serial line, and I need to set/reset the control 
signals RTS/DTR and read CTS/DSR and also I need to set up the baud rate.
Into UML kernel the line_ioctl and line_set_termio functions are 
essentialy empty, so I guess that what I need is intentionally not 
implemented for divide the Guest system from the Host. (please correct 
me if I wrong).

Anyway I need to know if it's possible to implement this functions, 
maybe bypassing the UML system, or something like that.
If possible, any suggestions?

Thanks,
Tiziano.




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Re: [uml-devel] Serial Line ioct and set_termios bypassing

[Jeff Dike]

On Thu, Dec 13, 2007 at 02:24:13PM +0100, tcappellari wrote:
> I'm developing an application that I want to run inside UML system. This 
> application use the serial line, and I need to set/reset the control 
> signals RTS/DTR and read CTS/DSR and also I need to set up the baud rate.
> Into UML kernel the line_ioctl and line_set_termio functions are 
> essentialy empty, so I guess that what I need is intentionally not 
> implemented for divide the Guest system from the Host. (please correct 
> me if I wrong).

I'll implement them if you'll test patches and tell me if they work.

The thing about serial ioctls is that few things use them and it's not
obvious what they are supposed to do.

What ioctls in particular are you missing?

				Jeff

-- 
Work email - jdike at linux dot intel dot com

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