How to write data to config file in kernel mode

On Mar 12, 2:51 am, Roberto Divia <Roberto.Di....RemoveThis@cern.ch> wrote:

> > Use a helper application and a well-defined protocol between the
> > application and the driver.
>
> Interesting... How would you start the helper application?

Possibly by executing it in the system startup scripts in the initial
ramfs. Another way would be to ship a library with the driver that
applications use to access the driver. The library starts the helper
application. It depends on the details of the driver.

The CIFS driver, for example has a helper application that mounts CIFS
filesystems. You can't do much with the CIFS driver without mounting a
filesystem.

The 'uvesafb' frame buffer driver requires a helper application,
'v86d'. See 'Documentation/fb/uvesafb.txt' for some details.

DS

David Schwartz wrote:
> On Mar 12, 1:47 am, Kid <kid197....DeleteThis@yahoo.com.tw> wrote:
>> I want to save some config data in kernel mode but my driver does not
>> implement fs_operation functions .
>>
>> Is there some functions which can read and write files in kernel
>> mode ?
>>
>> I know Windows has kernel mode file functions , how can I do that in
>> Linux ?
>>
>> Thank you .
>
> Use a helper application and a well-defined protocol between the
> application and the driver.

Interesting... How would you start the helper application?

Ciao,
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