Re: read/write a file in kernel

[amith <amith@multitech.co.in>]

prashanth wrote:

> hi ,
>
> i want to open a file in kernel mode,after that i want to read/write a 
> data to/from that  file.
>
>  
>
> i tried using sys_open,it doesn't work.
>
> then i tried with filp_open,it opens the file.but it returns a pointer 
> to struct file.
>
> now i want to read the opened file.can anyone pls tell me how to do that.
>
> thanks in advance.
>
>
> --
>
> Prashanth. M.N.

void read_write_file_example()
{

       mm_segment_t    oldfs,oldds;
       int fd,red;
       char buffer[100];
       

       oldds = get_fs();
       set_fs(get_ds());
	fd = sys_open("/home/amith/logger.dat",O_RDWR | O_CREAT);
       red = sys_read(fd,buffer,sizeof(buffer)); 
       set_fs(oldds);

       printk("<1> file contents = %s read %d bytes  \n",buffer,red );
       ................
      ..........................
} 

customize it for u r use :-) !

hth.

cheers,
Amith


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