2 * Portions Copyright (C) 2004, 2005, 2007 Internet Systems Consortium, Inc. ("ISC")
3 * Portions Copyright (C) 2000, 2001, 2003 Internet Software Consortium.
5 * Permission to use, copy, modify, and/or distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
10 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
11 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
12 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
13 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
14 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
15 * PERFORMANCE OF THIS SOFTWARE.
19 * Copyright (c) 1987, 1993
20 * The Regents of the University of California. All rights reserved.
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
25 * 1. Redistributions of source code must retain the above copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * This product includes software developed by the University of
33 * California, Berkeley and its contributors.
34 * 4. Neither the name of the University nor the names of its contributors
35 * may be used to endorse or promote products derived from this software
36 * without specific prior written permission.
38 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
39 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
40 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
41 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
42 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
43 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
44 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
45 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
46 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
47 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52 lwres_herror() prints the string s on stderr followed by the string
53 generated by lwres_hstrerror() for the error code stored in the global
54 variable lwres_h_errno.
56 lwres_hstrerror() returns an appropriate string for the error code
57 gievn by err. The values of the error codes and messages are as
60 \li #NETDB_SUCCESS: Resolver Error 0 (no error)
62 \li #HOST_NOT_FOUND: Unknown host
64 \li #TRY_AGAIN: Host name lookup failure
66 \li #NO_RECOVERY: Unknown server error
68 \li #NO_DATA: No address associated with name
72 #if defined(LIBC_SCCS) && !defined(lint)
73 static const char sccsid[] = "@(#)herror.c 8.1 (Berkeley) 6/4/93";
74 static const char rcsid[] =
75 "$Id: herror.c,v 1.17 2007/06/19 23:47:22 tbox Exp $";
76 #endif /* LIBC_SCCS and not lint */
82 #include <lwres/netdb.h>
83 #include <lwres/platform.h>
85 LIBLWRES_EXTERNAL_DATA int lwres_h_errno;
88 * these have never been declared in any header file so make them static
91 static const char *h_errlist[] = {
92 "Resolver Error 0 (no error)", /*%< 0 no error */
93 "Unknown host", /*%< 1 HOST_NOT_FOUND */
94 "Host name lookup failure", /*%< 2 TRY_AGAIN */
95 "Unknown server error", /*%< 3 NO_RECOVERY */
96 "No address associated with name", /*%< 4 NO_ADDRESS */
99 static int h_nerr = { sizeof(h_errlist) / sizeof(h_errlist[0]) };
104 * print the error indicated by the h_errno value.
107 lwres_herror(const char *s) {
108 fprintf(stderr, "%s: %s\n", s, lwres_hstrerror(lwres_h_errno));
113 * return the string associated with a given "host" errno value.
116 lwres_hstrerror(int err) {
118 return ("Resolver internal error");
119 else if (err < h_nerr)
120 return (h_errlist[err]);
121 return ("Unknown resolver error");