Hi all
I was trying to write a kernel module and in that module I wanted to do following
actions
1. open, write into a file
2. open, read from a file
3. use mmap on a file contents ..
4. create a socket ( DGRAM )
things like that .. I am not able to get much information in these issues.
Since the library files doesn't make much sense in kernel level, how do I go about
this .. ?
I will attach the code I have started writing .. please get me some input in
this ..
>>>>>
#define MODULE
#define __KERNEL
#define __KERNEL_SYSCALLS__
#include <linux/module.h>
#include <linux/string.h>
#include <unistd.h>
#include <fcntl.h>
#include <linux/mman.h>
#define BASE_ADDRESS (20 * 0x100000)
int init_module(void)
{
char *ptr;
int fd;
char str[10] = "suresh";
printk("<1>Hello/n");
ptr = (char *) BASE_ADDRESS;
fd = filp_open ("/dev/mem", O_RDWR, 0);
if (fd < 0) { printk ("error\n"); }
ptr = (char *) mmap(0, 1, PROT_READ|PROT_WRITE, MAP_SHARED, fd, BASE_ADDRESS);
memcpy(ptr, str, 5);
return 0;
}
int cleanup_module(void)
{
printk("Bye");
}
<<<<<
Help me correcting this program .. I could compile and make .o file..
but when I tried to insert, it says that unresolved
regs
salil
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