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3.3 Engine Configuration

You can change the configuration of a backend engine, and thus change the executable program and configuration directory to be used. You can make these changes the default or set them for some contexts individually.

— Function: gpgme_error_t gpgme_set_engine_info (gpgme_protocol_t proto, const char *file_name, const char *home_dir)

The function gpgme_set_engine_info changes the default configuration of the crypto engine implementing the protocol proto.

file_name is the file name of the executable program implementing this protocol, and home_dir is the directory name of the configuration directory for this crypto engine. If home_dir is NULL, the engine's default will be used.

The new defaults are not applied to already created GPGME contexts.

This function returns the error code GPG_ERR_NO_ERROR if successful, or an eror code on failure.

The functions gpgme_ctx_get_engine_info and gpgme_ctx_set_engine_info can be used to change the engine configuration per context. See Crypto Engine.