zmq_msg_get - get message property

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0MQ 4.3.5                                          03/31/2024                                     ZMQ_MSG_GET(3)

       The zmq_msg_get() function shall return the value for the property specified by the property argument for
       the message pointed to by the message argument.

       The following properties can be retrieved with the zmq_msg_get() function:

       ZMQ_MORE
           Indicates that there are more message frames to follow after the message.

       ZMQ_SRCFD
           Returns the file descriptor of the socket the message was read from. This allows application to
           retrieve the remote endpoint via getpeername(2). Be aware that the respective socket might be closed
           already, reused even. Currently only implemented for TCP sockets.

       ZMQ_SHARED
           Indicates that a message MAY share underlying storage with another copy of this message.

EINVAL
           The requested property is unknown.

Receivingamulti-framemessage.

           zmq_msg_t frame;
           while (true) {
               //  Create an empty 0MQ message to hold the message frame
               int rc = zmq_msg_init (&frame);
               assert (rc == 0);
               //  Block until a message is available to be received from socket
               rc = zmq_msg_recv (socket, &frame, 0);
               assert (rc != -1);
               if (zmq_msg_get (&frame, ZMQ_MORE))
                   fprintf (stderr, "more\n");
               else {
                   fprintf (stderr, "end\n");
                   break;
               }
               zmq_msg_close (&frame);
           }

       zmq_msg_get - get message property

       The zmq_msg_get() function shall return the value for the property if successful. Otherwise it shall
       return -1 and set errno to one of the values defined below.

zmq_msg_set(3) zmq_msg_init(3) zmq_msg_close(3) zmq(7)

intzmq_msg_get(zmq_msg_t*message,intproperty);