Pub-Sub envelope publisher in C

// Pubsub envelope publisher
// Note that the zhelpers.h file also provides s_sendmore

#include "zhelpers.h"
#include <unistd.h>

int main (void)
{
// Prepare our context and publisher
void *context = zmq_ctx_new ();
void *publisher = zmq_socket (context, ZMQ_PUB);
zmq_bind (publisher, "tcp://*:5563");

while (1) {
// Write two messages, each with an envelope and content
s_sendmore (publisher, "A");
s_send (publisher, "We don't want to see this");
s_sendmore (publisher, "B");
s_send (publisher, "We would like to see this");
sleep (1);
}
// We never get here, but clean up anyhow
zmq_close (publisher);
zmq_ctx_destroy (context);
return 0;
}