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As libzmq is compiled with optional transports and security mechanisms, there is no clean way for applications to determine what capabilities are actually available in a given libzmq instance. Solution: provide an API specifically for capability reporting. The zmq_has () method is meant to be open ended. It accepts a string so that we can add arbitrary capabilities without breaking existing applications. zmq.h also defines ZMQ_HAS_CAPABILITIES when this method is provided.
44 lines
1.1 KiB
Plaintext
44 lines
1.1 KiB
Plaintext
zmq_has(3)
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==========
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NAME
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----
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zmq_has - check a ZMQ capability
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SYNOPSIS
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--------
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*int zmq_has (const char *capability);*
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DESCRIPTION
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-----------
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The _zmq_has()_ function shall report whether a specified capability is
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available in the library. This allows bindings and applications to probe
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a library directly, for transport and security options.
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Capabilities shall be lowercase strings. The following capabilities are
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defined:
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* ipc - the library supports the ipc:// protocol
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* pgm - the library supports the pgm:// protocol
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* tipc - the library supports the tipc:// protocol
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* norm - the library supports the norm:// protocol
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* curve - the library supports the CURVE security mechanism
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* gssapi - the library supports the GSSAPI security mechanism
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When this method is provided, the zmq.h header file will define
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ZMQ_HAS_CAPABILITIES.
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RETURN VALUE
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------------
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The _zmq_has()_ function shall return 1 if the specified capability is
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provided. Otherwise it shall return 0.
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AUTHORS
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-------
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This page was written by the 0MQ community. To make a change please
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read the 0MQ Contribution Policy at <http://www.zeromq.org/docs:contributing>.
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