Re: [rtl] map a file to rtl space.

[Tomasz Motylewski <motyl@stan.chemie.unibas.ch>]

On Thu, 2 Mar 2000, Mario Teijeiro Otero wrote:

> 21/02/2000. I asked about the subject of this mail. I do this solution.
> 
> On  linux space:
> [...]
> 	flength=lseek(fd,0,SEEK_END);
> 	p=(char*)mbuff_alloc(M_PTR_MC,flength);
> 	[ if error...]
> 	pfichero=mmap((caddr_t)p,flength, PROT_READ,MAP_SHARED|MAP_FIXED|MAP_LOCKED,fd,0);
> 	
> and on rtlinux space:
> 	pteroMC=(char*)mbuff_alloc(M_PTR_MC,sizeMC);
>   	if(pteroMC==NULL){
> 		[....]

WHAT!? And it works?

Could you tell us what are you really trying to do? 
what is "fd" - which file have you opened?
mbuff_alloc in user space returns pointer to the already mmaped area, I have
no idea what the second mmap will do.

Is it that you want to access disk file in rtl(kernel space) as a memory
mapped area? This is not going to work, or at least I would be very suprised. 

Best regards,
--
Tomek