1 .\" $KAME: gai_strerror.3,v 1.1 2005/01/05 03:04:47 itojun Exp $
2 .\" $OpenBSD: gai_strerror.3,v 1.4 2004/12/20 23:04:53 millert Exp $
4 .\" Copyright (C) 2004 Internet Systems Consortium, Inc. ("ISC")
5 .\" Copyright (C) 2000, 2001 Internet Software Consortium.
7 .\" Permission to use, copy, modify, and distribute this software for any
8 .\" purpose with or without fee is hereby granted, provided that the above
9 .\" copyright notice and this permission notice appear in all copies.
11 .\" THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
12 .\" REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
13 .\" AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
14 .\" INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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26 .Nd get error message string from EAI_xxx error code
32 .Fn gai_strerror "int ecode"
36 function returns an error message string corresponding to the error code
42 The following error codes and their meaning are defined in
45 .Bl -tag -width ".Dv EAI_ADDRFAMILY" -offset indent -compact
47 Address family for hostname not supported
49 Name could not be resolved at this time
51 flags parameter had an invalid value
56 Non-recoverable failure in name resolution
58 Address family was not recognized
60 Memory allocation failure
62 No address associated with hostname
66 argument buffer overflow
68 Resolved protocol is unknown
70 Service was not recognized for socket type
72 Intended socket type was not recognized
74 System error returned in
81 returns a pointer to the error message string corresponding to
85 is out of range, an implementation-specific error message string is returned.
90 .Bl -tag -width ".It RFC 3493"
92 Basic Socket Interface Extensions for IPv6
95 EAI_ADDRFAMILY and EAI_NODATA were in previous RFCs, but not in RFC 3493.
96 They are not in POSIX (IEEE Std 1003.1-2017).
99 before 5.2, and were re-added for 14.0.
100 EAI_BADHINTS, EAI_OVERFLOW, and EAI_PROTOCOL are not in RFC 3493 or POSIX.