- write(chkpwd_write_pipe[1], &uid, sizeof(uid_t));
- write(chkpwd_write_pipe[1], pass, 256);
- read(chkpwd_read_pipe[0], buf, 4);
+ rv = write(chkpwd_write_pipe[1], &uid, sizeof(uid_t));
+ rv = write(chkpwd_write_pipe[1], pass, 256);
+ rv = read(chkpwd_read_pipe[0], buf, 4);