again:
if (1 == (rc = read (fd, &c, 1))) {
*bufp ++ = c;
if ('\n' == c)
break; /*newline is stored*/
} else if (rc == 0) {
*bufp = 0;
return (n - 1); /*EOF, n-1 bytes were read*/
} else {
if (EINTR == errno) /*interrupt*/
goto again;
return -1; /*Erro, set the errno by read ()*/
}
}
*bufp = 0;
return n;
}
运行结果：
因为客户端没有指定IP地址和端口，所以其IP和端口都是内核随机分配的。