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zmq_recv - receive a message part from a socket
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*int zmq_recv (void '*socket', void '*buf', size_t 'len', int 'flags');*
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The _zmq_recv()_ function shall receive a message from the socket referenced
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by the 'socket' argument and store it in the buffer referenced by the 'buf'
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argument. Any bytes exceeding the length specified by the 'len' argument shall
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be truncated. If there are no messages available on the specified 'socket'
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the _zmq_recv()_ function shall block until the request can be satisfied.
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The 'flags' argument is a combination of the flags defined below:
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Specifies that the operation should be performed in non-blocking mode. If there
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are no messages available on the specified 'socket', the _zmq_recv()_
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function shall fail with 'errno' set to EAGAIN.
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A 0MQ message is composed of 1 or more message parts. Each message
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part is an independent 'zmq_msg_t' in its own right. 0MQ ensures atomic
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delivery of messages; peers shall receive either all _message parts_ of a
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message or none at all. The total number of message parts is unlimited except
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An application that processes multipart messages must use the _ZMQ_RCVMORE_
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linkzmq:zmq_getsockopt[3] option after calling _zmq_recv()_ to determine if
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there are further parts to receive.
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The _zmq_recv()_ function shall return number of bytes in the message
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if successful. Note that the value can exceed the value of the 'len' parameter
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in case the message was truncated. If not successful the function shall return
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`-1` and set 'errno' to one of the values defined below.
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Non-blocking mode was requested and no messages are available at the moment.
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The _zmq_recv()_ operation is not supported by this socket type.
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The _zmq_recv()_ operation cannot be performed on this socket at the moment
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due to the socket not being in the appropriate state. This error may occur with
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socket types that switch between several states, such as ZMQ_REP. See the
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_messaging patterns_ section of linkzmq:zmq_socket[3] for more information.
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The 0MQ 'context' associated with the specified 'socket' was terminated.
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The provided 'socket' was invalid.
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The operation was interrupted by delivery of a signal before a message was
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.Receiving a message from a socket
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nbytes = zmq_recv (socket, buf, 256, 0);
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assert (nbytes != -1);
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linkzmq:zmq_recvmsg[3]
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linkzmq:zmq_sendmsg[3]
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linkzmq:zmq_getsockopt[3]
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+This man page was written by Martin Sustrik <sustrik@250bpm.com>, Martin
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+Lucina <martin@lucina.net> and Pieter Hintjens <ph@imatix.com>.
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doc/zmq_recv.txt
