Shuts down a socket connection in the manner indicated by HOW, which has the same interpretation as in the system call of the same name.
shutdown(SOCKET, 0); # I/we have stopped reading datashutdown(SOCKET, 1); # I/we have stopped writing datashutdown(SOCKET, 2); # I/we have stopped using this socketThis is useful with sockets when you want to tell the other side you're done writing but not done reading, or vice versa. It's also a more insistent form of close because it also disables the file descriptor in any forked copies in other processes.
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