Re: passing array from kernel space to user space

[taha hafeez <tawushafeez@xxxxxxxxx>]

On Wed, 2006-04-05 at 23:06 +0200, Vincenzo Mallozzi wrote:
> --- taha hafeez <tawushafeez@xxxxxxxxx> wrote:
> 
> > 
> > Well, I think I get you now....
> > 
> > Correct me if I am wrong... 
> > 
> > 
> >             data buffer
> > USER_SPACE ------------>  KERNEL SPACE [fill data
> > with pid_t]
> >       ^                       |
> >       |                       | 
> >       *------<----------------*
> >             data buffer
> > 
> > Why do we need to pass the data buffer to kernel ? 
> > Does it contain any information that kernel needs ?
> > if not, then that step can be avoided ?
> 
> no, I do not pass data buffer from user space. I pass,
> instead, the length of this buffer.
> The data buffer are retrieved from within the kernel
> space.
Why do you need to pass the length?
If this is the length of the buffer to be retrieved then
write() has a parameter for this purpose...

checkout write(), It will be do everything you need!!!

> thanks.
> Vincenzo
> 
> 
> 	
> 	
> 		
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