Host error variable
#include <netdb.h> extern int h_errno;
Use the -l socket option to qcc to link against this library.
The h_errno variable can be set by any one of the following functions:
It can be set to any one of the following:
- Authoritative answer: Unknown host.
- You specified an invalid address family when calling gethostbyname2() .
- Valid name, no data record of the requested type. The name is known to the name server, but has no IP address associated with it—this isn't a temporary error. Another type of request to the name server using this domain name will result in an answer (e.g. a mail-forwarder may be registered for this domain).
- Unknown server error. An unexpected server failure was encountered. This is a nonrecoverable network error.
- Nonauthoritative answer: Host name lookup failure. This is usually a temporary error and means that the local server didn't receive a response from an authoritative server. A retry at some later time may succeed.
Unlike errno , h_errno isn't thread-safe.