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+.TH zmq_recv 3 "" "(c)2007-2009 FastMQ Inc." "0MQ User Manuals"
+.SH NAME
+zmq_recv \- retrieves a message from the socket
+.SH SYNOPSIS
+.B int zmq_recv (void *s, zmq_msg_t *msg, int flags);
+.SH DESCRIPTION
+Receive a message from the socket
+.IR s ,
+store it in
+.IR msg .
+Any content previously in
+.IR msg
+will be properly deallocated.
+.IR flags
+argument can be combination of the flags described below.
+
+.IP "\fBZMQ_NOBLOCK\fP"
+The flag specifies that the operation should be performed in
+non-blocking mode. I.e. if it cannot be processed immediately,
+error should be returned with
+.IR errno
+set to EAGAIN.
+
+.SH RETURN VALUE
+In case of success the function returns zero. Otherwise it returns -1 and
+sets
+.IR errno
+to the appropriate value.
+.SH ERRORS
+.IP "\fBEAGAIN\fP"
+it's a non-blocking receive and there's no message available at the moment.
+.IP "\fBENOTSUP\fP"
+function isn't supported by particular socket type.
+.IP "\fBEFSM\fP"
+function cannot be called at the moment, because socket is not in the
+approprite state. This error may occur with sockets that switch between
+several states (e.g. ZMQ_REQ).
+.SH EXAMPLE
+.nf
+zmq_msg_t msg;
+int rc = zmq_msg_init (&msg);
+assert (rc == 0);
+rc = zmq_recv (s, &msg, 0);
+assert (rc == 0);
+.fi
+.SH SEE ALSO
+.BR zmq_send (3)
+.BR zmq_msg_init (3)
+.BR zmq_msg_data (3)
+.BR zmq_msg_size (3)
+.SH AUTHOR
+Martin Sustrik <sustrik at 250bpm dot com>