Update.
[glibc.git] / resolv / herror.c
blob571d1a04783de1beac6060615bf7a75cf66efb63
1 /*
2 * ++Copyright++ 1987, 1993
3 * -
4 * Copyright (c) 1987, 1993
5 * The Regents of the University of California. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by the University of
18 * California, Berkeley and its contributors.
19 * 4. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 * -
35 * Portions Copyright (c) 1993 by Digital Equipment Corporation.
37 * Permission to use, copy, modify, and distribute this software for any
38 * purpose with or without fee is hereby granted, provided that the above
39 * copyright notice and this permission notice appear in all copies, and that
40 * the name of Digital Equipment Corporation not be used in advertising or
41 * publicity pertaining to distribution of the document or software without
42 * specific, written prior permission.
44 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
45 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
46 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
47 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
48 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
49 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
50 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
51 * SOFTWARE.
52 * -
53 * --Copyright--
56 #if defined(LIBC_SCCS) && !defined(lint)
57 static char sccsid[] = "@(#)herror.c 8.1 (Berkeley) 6/4/93";
58 static char rcsid[] = "$Id$";
59 #endif /* LIBC_SCCS and not lint */
61 #include <sys/types.h>
62 #include <sys/param.h>
63 #include <sys/uio.h>
64 #include <netdb.h>
65 #if defined(BSD) && (BSD >= 199103)
66 # include <unistd.h>
67 # include <string.h>
68 #else
69 # include "../conf/portability.h"
70 #endif
72 const char *h_errlist[] = {
73 N_("Resolver Error 0 (no error)"),
74 N_("Unknown host"), /* 1 HOST_NOT_FOUND */
75 N_("Host name lookup failure"), /* 2 TRY_AGAIN */
76 N_("Unknown server error"), /* 3 NO_RECOVERY */
77 N_("No address associated with name"), /* 4 NO_ADDRESS */
79 int h_nerr = { sizeof h_errlist / sizeof h_errlist[0] };
81 #ifndef h_errno
82 extern int h_errno;
83 #endif
86 * herror --
87 * print the error indicated by the h_errno value.
89 void
90 herror(s)
91 const char *s;
93 struct iovec iov[4];
94 register struct iovec *v = iov;
96 if (s && *s) {
97 v->iov_base = (char *)s;
98 v->iov_len = strlen(s);
99 v++;
100 v->iov_base = ": ";
101 v->iov_len = 2;
102 v++;
104 v->iov_base = (char *)hstrerror(h_errno);
105 v->iov_len = strlen(v->iov_base);
106 v++;
107 v->iov_base = "\n";
108 v->iov_len = 1;
109 writev(STDERR_FILENO, iov, (v - iov) + 1);
112 const char *
113 hstrerror(err)
114 int err;
116 if (err < 0)
117 return _("Resolver internal error");
118 else if (err < h_nerr)
119 return _(h_errlist[err]);
120 return _("Unknown resolver error");