2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
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12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the project nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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29 * $FreeBSD: head/lib/libc/net/gai_strerror.c 199083 2009-11-09 12:46:59Z ume $
32 #include "namespace.h"
40 #include "reentrant.h"
42 #include "un-namespace.h"
44 /* Entries EAI_ADDRFAMILY (1) and EAI_NODATA (7) are obsoleted, but left */
45 /* for backward compatibility with userland code prior to 2553bis-02 */
46 static const char *ai_errlist[] = {
48 "Address family for hostname not supported", /* 1 */
49 "Temporary failure in name resolution", /* EAI_AGAIN */
50 "Invalid value for ai_flags", /* EAI_BADFLAGS */
51 "Non-recoverable failure in name resolution", /* EAI_FAIL */
52 "ai_family not supported", /* EAI_FAMILY */
53 "Memory allocation failure", /* EAI_MEMORY */
54 "No address associated with hostname", /* 7 */
55 "hostname nor servname provided, or not known", /* EAI_NONAME */
56 "servname not supported for ai_socktype", /* EAI_SERVICE */
57 "ai_socktype not supported", /* EAI_SOCKTYPE */
58 "System error returned in errno", /* EAI_SYSTEM */
59 "Invalid value for hints", /* EAI_BADHINTS */
60 "Resolved protocol is unknown", /* EAI_PROTOCOL */
61 "Argument buffer overflow" /* EAI_OVERFLOW */
65 static char gai_buf[NL_TEXTMAX];
66 static once_t gai_init_once = ONCE_INITIALIZER;
67 static thread_key_t gai_key;
68 static int gai_keycreated = 0;
73 gai_keycreated = (thr_keycreate(&gai_key, free) == 0);
78 gai_strerror(int ecode)
87 if (thr_once(&gai_init_once, gai_keycreate) != 0 ||
90 if ((buf = thr_getspecific(gai_key)) == NULL) {
91 if ((buf = malloc(sizeof(gai_buf))) == NULL)
93 if (thr_setspecific(gai_key, buf) != 0) {
100 catd = catopen("libc", NL_CAT_LOCALE);
101 if (ecode > 0 && ecode < EAI_MAX)
102 strlcpy(buf, catgets(catd, 3, ecode, ai_errlist[ecode]),
105 strlcpy(buf, catgets(catd, 3, NL_MSGMAX - 1, "Success"),
108 strlcpy(buf, catgets(catd, 3, NL_MSGMAX, "Unknown error"),
115 if (ecode >= 0 && ecode < EAI_MAX)
116 return ai_errlist[ecode];
117 return "Unknown error";