| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 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 | #if defined(LIBC_SCCS) && !defined(lint) |
| 48 | static const char sccsid[] = "@(#)herror.c 8.1 (Berkeley) 6/4/93"; |
| 49 | static const char rcsid[] = "$BINDId: herror.c,v 8.11 1999/10/13 16:39:39 vixie Exp $"; |
| 50 | #endif /* LIBC_SCCS and not lint */ |
| 51 | |
| 52 | #include <sys/types.h> |
| 53 | #include <sys/param.h> |
| 54 | #include <sys/uio.h> |
| 55 | |
| 56 | #include <netinet/in.h> |
| 57 | #include <arpa/nameser.h> |
| 58 | |
| 59 | #include <netdb.h> |
| 60 | #include <resolv.h> |
| 61 | #include <string.h> |
| 62 | #include <unistd.h> |
| 63 | |
| 64 | #include <libintl.h> |
| 65 | #include <not-cancel.h> |
| 66 | |
| 67 | const char *const h_errlist[] = { |
| 68 | N_("Resolver Error 0 (no error)"), |
| 69 | N_("Unknown host"), /* 1 HOST_NOT_FOUND */ |
| 70 | N_("Host name lookup failure"), /* 2 TRY_AGAIN */ |
| 71 | N_("Unknown server error"), /* 3 NO_RECOVERY */ |
| 72 | N_("No address associated with name"), /* 4 NO_ADDRESS */ |
| 73 | }; |
| 74 | const int h_nerr = { sizeof h_errlist / sizeof h_errlist[0] }; |
| 75 | |
| 76 | /* |
| 77 | * herror -- |
| 78 | * print the error indicated by the h_errno value. |
| 79 | */ |
| 80 | void |
| 81 | herror(const char *s) { |
| 82 | struct iovec iov[4], *v = iov; |
| 83 | |
| 84 | if (s != NULL && *s != '\0') { |
| 85 | v->iov_base = (/*noconst*/ char *)s; |
| 86 | v->iov_len = strlen(s); |
| 87 | v++; |
| 88 | v->iov_base = ": "; |
| 89 | v->iov_len = 2; |
| 90 | v++; |
| 91 | } |
| 92 | v->iov_base = (char *)hstrerror(h_errno); |
| 93 | v->iov_len = strlen(v->iov_base); |
| 94 | v++; |
| 95 | v->iov_base = "\n"; |
| 96 | v->iov_len = 1; |
| 97 | writev_not_cancel_no_status(STDERR_FILENO, iov, (v - iov) + 1); |
| 98 | } |
| 99 | |
| 100 | /* |
| 101 | * hstrerror -- |
| 102 | * return the string associated with a given "host" errno value. |
| 103 | */ |
| 104 | const char * |
| 105 | hstrerror(int err) { |
| 106 | if (err < 0) |
| 107 | return _("Resolver internal error"); |
| 108 | else if (err < h_nerr) |
| 109 | return _(h_errlist[err]); |
| 110 | return _("Unknown resolver error"); |
| 111 | } |
| 112 | libc_hidden_def (hstrerror) |