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Manual Pages  — GAI_STRERROR

NAME

gai_strerror – get error message string from EAI_xxx error code

CONTENTS

SYNOPSIS

#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>

const char *
gai_strerror(int ecode);

DESCRIPTION

The gai_strerror() function returns an error message string corresponding to the error code returned by getaddrinfo(3) or getnameinfo(3).

The following error codes and their meaning are defined in <netdb.h>:

EAI_AGAIN Name could not be resolved at this time
EAI_BADFLAGS
  flags parameter had an invalid value
EAI_BADHINTS
  invalid value for hints
EAI_FAIL Non-recoverable failure in name resolution
EAI_FAMILY Address family was not recognized
EAI_MEMORY Memory allocation failure
EAI_NONAME Name does not resolve
EAI_OVERFLOW
  argument buffer overflow
EAI_PROTOCOL
  Resolved protocol is unknown
EAI_SERVICE Service was not recognized for socket type
EAI_SOCKTYPE
  Intended socket type was not recognized
EAI_SYSTEM System error returned in errno

RETURN VALUES

The gai_strerror() function returns a pointer to the error message string corresponding to ecode. If ecode is out of range, an implementation-specific error message string is returned.

SEE ALSO

getaddrinfo(3), getnameinfo(3)

STANDARDS

RFC 3493
  Basic Socket Interface Extensions for IPv6

GAI_STRERROR (3) December 23, 2018

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… one of the main causes of the fall of the Roman Empire was that, lacking zero, they had no way to indicate successful termination of their C programs.
— Robert Firth