Re: a problem in a character driver code

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Ok by now I have been able to fix this problem.

1) config.h has been dropped from 2.6.19 series of kernels so that was one error

2) the program was kept in a directory whose directory name had a blank space in between this was also giving me errors
3) I had tried the functions with my name rather than memory_open,memory_read,memory_release
I am not clear if this type of use is wrong.

On Sun, Sep 12, 2010 at 7:52 PM, Bond <jamesbond.2k.g@xxxxxxxxx> wrote:
=============================================================================================


/* Necessary includes for device drivers */
#include <linux/init.h>
#include <linux/config.h>

config.h has been dropped from 2.6.19 series of kernels so that was one error
 
#include <linux/module.h>
#include <linux/kernel.h> /* printk() */
#include <linux/slab.h> /* kmalloc() */
#include <linux/fs.h> /* everything... */
#include <linux/errno.h> /* error codes */
#include <linux/types.h> /* size_t */
#include <linux/proc_fs.h>
#include <linux/fcntl.h> /* O_ACCMODE */
#include <asm/system.h> /* cli(), *_flags */
#include <asm/uaccess.h> /* copy_from/to_user */


/* Declaration of memory.c functions */
int bond_open(struct inode *inode, struct file *filp) { return 0;};
I had tried the functions with my name rather than memory_open,memory_read,memory_release
I am not clear if this type of use is wrong. 
The driver is working but it if I do

echo -n abcdefg > /dev/memory

then on doing cat /dev/memory
only last g is coming and all previous words which I gave abcdef  are dropped out
any idea on what might be the error.


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