zmq_unbind(3)
==============


NAME
----
zmq_unbind - Stop accepting connections on a socket


SYNOPSIS
--------
int zmq_unbind (void '*socket', const char '*endpoint');


DESCRIPTION
-----------
The _zmq_unbind()_ function shall unbind a socket specified
by the 'socket' argument from the endpoint specified by the 'endpoint'
argument. 

The 'endpoint' argument is as described in linkzmq:zmq_bind[3]

Unbinding wild-card address from a socket
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
When wild-card `*` 'endpoint' (described in linkzmq:zmq_tcp[7],
linkzmq:zmq_ipc[7] and linkzmq:zmq_vmci[7]) was used in _zmq_bind()_, the caller should use
real 'endpoint' obtained from the ZMQ_LAST_ENDPOINT socket option
to unbind this 'endpoint' from a socket.

RETURN VALUE
------------
The _zmq_unbind()_ function shall return zero if successful. Otherwise it
shall return `-1` and set 'errno' to one of the values defined below.

ERRORS
------
*EINVAL*::
The endpoint supplied is invalid.
*ETERM*::
The 0MQ 'context' associated with the specified 'socket' was terminated.
*ENOTSOCK*::
The provided 'socket' was invalid.
*ENOENT*::
The endpoint supplied was not previously bound.


EXAMPLES
--------
.Unbind a subscriber socket from a TCP transport
----
/* Create a ZMQ_SUB socket */
void *socket = zmq_socket (context, ZMQ_SUB);
assert (socket);
/* Connect it to the host server001, port 5555 using a TCP transport */
rc = zmq_bind (socket, "tcp://127.0.0.1:5555");
assert (rc == 0);
/* Disconnect from the previously connected endpoint */
rc = zmq_unbind (socket, "tcp://127.0.0.1:5555");
assert (rc == 0);
----

.Unbind wild-card `*` binded socket
----
/* Create a ZMQ_SUB socket */
void *socket = zmq_socket (context, ZMQ_SUB);
assert (socket);
/* Bind it to the system-assigned ephemeral port using a TCP transport */
rc = zmq_bind (socket, "tcp://127.0.0.1:*");
assert (rc == 0);
/* Obtain real endpoint */
const size_t buf_size = 32;
char buf[buf_size];
rc = zmq_getsockopt (socket, ZMQ_LAST_ENDPOINT, buf, (size_t *)&buf_size);
assert (rc == 0);
/* Unbind socket by real endpoint */
rc = zmq_unbind (socket, buf);
assert (rc == 0);
----

SEE ALSO
--------
linkzmq:zmq_bind[3]
linkzmq:zmq_socket[3]
linkzmq:zmq[7]


AUTHORS
-------
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read the 0MQ Contribution Policy at <http://www.zeromq.org/docs:contributing>.
