lkml.org 
[lkml]   [2007]   [Apr]   [7]   [last100]   RSS Feed
Views: [more markup]  [less markup]  [headers]  [forward] 
 
Messages in this thread
/
FromRoland Kuhn <>
SubjectRe: Two questions regarding Opening files within Kernel!
DateSat, 7 Apr 2007 11:22:57 +0200
Hi!

On 7 Apr 2007, at 08:58, JanuGerman wrote:

> 1)   I have just a file path with me, an absolute path, but no  
> dentry, no inode, no vfsmount object, which function i can call to  
> get a "file" object associated with the absoulte file path. I have  
> surfed arround the source code especially fs/open.c and some other  
> files, but each function requires a parameter "mode" and "fd"  
> beside file path. Actually, i was confuse about the "mode"  
> parameter (and its differece with "flag"), like what to send, and  
> secondly for "fd", i am not sure, what value to send as there is no  
> file infact and only file path exists. Any idea?
>
No, but I'm no guru either.

> 2) Any functionality within linux kernel source code, to read one  
> line per file? or some indirect way to set buffer size for one  
> read?. That is, any existing header file for doing text I/O rather  
> than binary within the kernel source code?
>
Do you have a compelling reason for not letting userspace feed the  
file to your driver? That would be the natural and much easier way, I  
suppose...

Ciao,
                     Roland

--
TU Muenchen, Physik-Department E18, James-Franck-Str., 85748 Garching
Telefon 089/289-12575; Telefax 089/289-12570
--
CERN office: 892-1-D23 phone: +41 22 7676540 mobile: +41 76 487 4482
--
Any society that would give up a little liberty to gain a little
security will deserve neither and lose both.  - Benjamin Franklin
-----BEGIN GEEK CODE BLOCK-----
Version: 3.12
GS/CS/M/MU d-(++) s:+ a-> C+++ UL++++ P+++ L+++ E(+) W+ !N K- w--- M 
+ !V Y+
PGP++ t+(++) 5 R+ tv-- b+ DI++ e+++>++++ h---- y+++
------END GEEK CODE BLOCK------

[unhandled content-type:application/pkcs7-signature][unhandled content-type:application/pgp-signature]
\
 
 \ /
  Last update: 2007-04-07 09:25    [from the cache]
©2003-2008