问题描述
使用 Winsock2的下面返回code序列 1 的（失败）选择（）。
Using Winsock2 the code sequence below returns -1 (failure) for select().
#include <Winsock2.h>
#include <stdio.h>
...
int rc;
int fdstdin = fileno(stdin); /* returns 0 as expected */
fd_set fds;
FD_ZERO(&fds);
FD_SET(fdstdin, &fds);
rc = select(1, &fds, NULL, NULL, NULL);
...
使用 Winsock2的还是我失去了一些东西时，这是预期的行为？
Is this the expected behaviour when using Winsock2 or am I missing something?
推荐答案
这是预期的行为。正如前面提到的各地，winsock的的选功能仅适用于插座和标准输入不是一个套接字。
This is expected behavior. As mentioned all over the documentation, winsock's select function only works on sockets, and stdin is not a socket.
如果你有一个名为于WSAGetLastError ，你肯定会发现，原因是
If you had called WSAGetLastError, you undoubtedly would have found that the cause was
WSAENOTSOCK 一个描述符集包含一个项，它不是一个套接字。
尝试 WSAEventSelect 和 WaitForMultipleObjectsEx ;后者也可以等待正常的文件句柄，以及从优秀的读取操作上正常的文件处理重叠的事件对象。
Try WSAEventSelect and WaitForMultipleObjectsEx; the latter can also wait on normal file handles as well as OVERLAPPED event objects from outstanding read operations on normal file handles.
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