1 | /* |
2 | * Copyright (c) 1987, 1993 |
3 | * The Regents of the University of California. All rights reserved. |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
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. |
16 | * |
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 |
27 | * SUCH DAMAGE. |
28 | */ |
29 | |
30 | /* |
31 | * Portions Copyright (c) 1996-1999 by Internet Software Consortium. |
32 | * |
33 | * Permission to use, copy, modify, and distribute this software for any |
34 | * purpose with or without fee is hereby granted, provided that the above |
35 | * copyright notice and this permission notice appear in all copies. |
36 | * |
37 | * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS |
38 | * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES |
39 | * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE |
40 | * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL |
41 | * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR |
42 | * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS |
43 | * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS |
44 | * SOFTWARE. |
45 | */ |
46 | |
47 | #include <sys/types.h> |
48 | #include <sys/param.h> |
49 | #include <sys/uio.h> |
50 | |
51 | #include <netinet/in.h> |
52 | #include <arpa/nameser.h> |
53 | |
54 | #include <netdb.h> |
55 | #include <resolv.h> |
56 | #include <string.h> |
57 | #include <unistd.h> |
58 | |
59 | #include <libintl.h> |
60 | #include <not-cancel.h> |
61 | |
62 | const char *const h_errlist[] = { |
63 | N_("Resolver Error 0 (no error)" ), |
64 | N_("Unknown host" ), /* 1 HOST_NOT_FOUND */ |
65 | N_("Host name lookup failure" ), /* 2 TRY_AGAIN */ |
66 | N_("Unknown server error" ), /* 3 NO_RECOVERY */ |
67 | N_("No address associated with name" ), /* 4 NO_ADDRESS */ |
68 | }; |
69 | const int h_nerr = { sizeof h_errlist / sizeof h_errlist[0] }; |
70 | |
71 | /* |
72 | * herror -- |
73 | * print the error indicated by the h_errno value. |
74 | */ |
75 | void |
76 | herror(const char *s) { |
77 | struct iovec iov[4], *v = iov; |
78 | |
79 | if (s != NULL && *s != '\0') { |
80 | v->iov_base = (/*noconst*/ char *)s; |
81 | v->iov_len = strlen(s); |
82 | v++; |
83 | v->iov_base = (char *) ": " ; |
84 | v->iov_len = 2; |
85 | v++; |
86 | } |
87 | v->iov_base = (char *)hstrerror(h_errno); |
88 | v->iov_len = strlen(v->iov_base); |
89 | v++; |
90 | v->iov_base = (char *) "\n" ; |
91 | v->iov_len = 1; |
92 | __writev_nocancel_nostatus(STDERR_FILENO, iov, (v - iov) + 1); |
93 | } |
94 | |
95 | /* |
96 | * hstrerror -- |
97 | * return the string associated with a given "host" errno value. |
98 | */ |
99 | const char * |
100 | hstrerror(int err) { |
101 | if (err < 0) |
102 | return _("Resolver internal error" ); |
103 | else if (err < h_nerr) |
104 | return _(h_errlist[err]); |
105 | return _("Unknown resolver error" ); |
106 | } |
107 | libc_hidden_def (hstrerror) |
108 | |