2.2 How can I tell when the other end of a connection shuts down?

If you try to read from a pipe, socket, FIFO etc. when the writing end of the connection has been closed, you get an end-of-file indication (read() returns 0 bytes read). If you try and write to a pipe, socket etc. when the reading end has closed, then a SIGPIPE signal will be delivered to the process, killing it unless the signal is caught. (If you ignore or block the signal, the write() call fails with EPIPE.)

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