Re: Yet, another question about writing a module.....

[John Levon <moz@compsoc.man.ac.uk>]

On Fri, 16 Feb 2001 aprasad@in.ibm.com wrote:

> >So, is there any function that I can use to read the content of a file?
> >Any tip will be useful.....
> 
> try this
> 
> struct file *filp;
> mm_segment_t old_fs;
> filp = filp_open(name,flags,mode);
> old_fs= getfs();
> set_fs(KERNEL_DS);
> filp->f_op->read(filp,buffer,count,&filp->f_pos);
> 
> 
> 
> But you should keep one thing in mind that before this code is executed you
> have the filesystem on this this particular file exists has been already
> mounted otherwise you risk the crashing of kernel.
> 
> Regards,
> Anil

It's also worth pointing out, you almost never need to do this. If you find
yourself needing this, it's probably time for a redesign.

john

-- 
"Good sense is, of all things among men, the most equally distributed; for
 every one thinks himself so abundantly provided with it, that those even
 who are the most difficult to satisfy in everything else, do not usually
 desire a larger measure of this quality than they already possess." 
	- Descartes 

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