cc [ flag ... ] file ... –ldns_sd [ library ... ] #include <dns_sd.h> DNSServiceRefSockFD(DNSServiceRef *sdRef);
Access the underlying UNIX® domain socket from the initialized DNSServiceRef returned from DNS Service calls. Applications should only access the underlying UNIX domain socket to poll for results from the mDNS daemon. Applications should not directly read or write to the socket. When results are available, applications should call DNSServiceProcessResult(). The application is responsible for processing the data on the socket in a timely fashion. The daemon can terminate its connection with a client that does not clear its socket buffer.
The underlying UNIX domain socket descriptor of the DNSServiceRef or -1 is returned in case of error.
See attributes(5) for description of the following attributes: