2 * Copyright (c) 1987, 1993
3 * The Regents of the University of California. All rights reserved.
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
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University 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 REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
32 * Portions Copyright (c) 1996-1999 by Internet Software Consortium.
34 * Permission to use, copy, modify, and distribute this software for any
35 * purpose with or without fee is hereby granted, provided that the above
36 * copyright notice and this permission notice appear in all copies.
38 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
39 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
40 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
41 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
42 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
43 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
44 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
47 #if defined(LIBC_SCCS) && !defined(lint)
48 static const char sccsid[] = "@(#)herror.c 8.1 (Berkeley) 6/4/93";
49 static const char rcsid[] = "$Id: herror.c,v 1.4 2005/04/27 04:56:41 sra Exp $";
50 #endif /* LIBC_SCCS and not lint */
51 #include <sys/cdefs.h>
52 __FBSDID("$FreeBSD$");
54 #include "port_before.h"
56 #include "namespace.h"
57 #include <sys/types.h>
58 #include <sys/param.h>
61 #include <netinet/in.h>
62 #include <arpa/nameser.h>
68 #include "un-namespace.h"
70 #include "port_after.h"
72 const char *h_errlist[] = {
73 "Resolver Error 0 (no error)",
74 "Unknown host", /*%< 1 HOST_NOT_FOUND */
75 "Host name lookup failure", /*%< 2 TRY_AGAIN */
76 "Unknown server error", /*%< 3 NO_RECOVERY */
77 "No address associated with name", /*%< 4 NO_ADDRESS */
79 const int h_nerr = { sizeof h_errlist / sizeof h_errlist[0] };
86 * print the error indicated by the h_errno value.
89 herror(const char *s) {
90 struct iovec iov[4], *v = iov;
93 if (s != NULL && *s != '\0') {
96 v->iov_len = strlen(t);
103 DE_CONST(hstrerror(*__h_errno()), t);
105 v->iov_len = strlen(v->iov_base);
110 _writev(STDERR_FILENO, iov, (v - iov) + 1);
115 * return the string associated with a given "host" errno value.
120 return ("Resolver internal error");
121 else if (err < h_nerr)
122 return (h_errlist[err]);
123 return ("Unknown resolver error");