/* no ptrace module
   fast prevention for kenrel bug
   (c) 2001 a Lam3rZ oddysey
*/


#define MODULE
#define __KERNEL__

#include <linux/module.h>
#include <linux/sched.h>
#include <linux/unistd.h>
#include <sys/syscall.h>

#ifndef KERNEL_VERSION
#define KERNEL_VERSION(a,b,c) ((a)*65536+(b)*256+(c))
#endif

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,0)
#include <asm/unistd.h>
#endif

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,14)
#include <bits/syscall.h>
#endif

extern void *sys_call_table[];

int (*orig_ptrace)(int, int, int, int);

int no_ptrace (int request, int pid, int addr, int data) {
	if (current->euid ==0 ) {
		return (orig_ptrace)(request, pid, addr, data);
	} else 
	return -1;
}


int init_module(void) {
	
	orig_ptrace = sys_call_table[__NR_ptrace];
	sys_call_table[__NR_ptrace]=no_ptrace;
	return 0;
}

void cleanup_module(void) {
	
	sys_call_table[__NR_ptrace]=orig_ptrace;
}