我想等待一个恒定的时间(例如3秒),以便recvfrom()接收一些数据,并且如果程序什么都没收到(在这3秒钟之内),我想退出程序怎么办?
Call setsockopt()
with the SO_RCVTIMEO
option to set a read timeout on the socket. If the timeout fires, recvfrom()
will return -1 with errno == EAGAIN/EWOULDBLOCK
.
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