sigpipe
sigpipe-
Any program that sends on a TCP socket must explicitly deal with SIGPIPE in order to be robust .
在TCP套接字上发送数据的任何程序都必须显示处理SIGPIPE以便保证健壮性。
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In this case , you 'll receive a SIGPIPE signal or , if this signal is blocked , the write function will return a-1 and set errno to EPIPE .
在这种情况下，接收SIGPIPE信号，或如果该信号阻塞，write函数将返回-1并设置errno为EPIPE。