recv函数问题

yanghs.dgut

客户端 向服务端发送数据，
服务端用recv()接收，
问题是当客户端断开时， recv()的返回值是什么， errno会是什么？

[ 本帖最后由 yanghs.dgut 于 2007-4-4 10:16 编辑 ]

sihan

$man recv

       If no messages are available at the socket, the receive calls wait  for
       a message to arrive, unless the socket is nonblocking (see fcntl(2)) in
       which case the value -1 is returned and the external variable errno set
       to EAGAIN.

so you must realize timeout

yanghs.dgut

我改为nonblocking 试试看

shagpg2008

In fact. whether blocking or not, When the other close the link, It will return 0, and only returned in this case.