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 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * - 33 * Portions Copyright (c) 1993 by Digital Equipment Corporation. 34 * 35 * Permission to use, copy, modify, and distribute this software for any 36 * purpose with or without fee is hereby granted, provided that the above 37 * copyright notice and this permission notice appear in all copies, and that 38 * the name of Digital Equipment Corporation not be used in advertising or 39 * publicity pertaining to distribution of the document or software without 40 * specific, written prior permission. 41 * 42 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL 43 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES 44 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT 45 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 46 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 47 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 48 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 49 * SOFTWARE. 50 * - 51 * --Copyright-- 52 */ 53 54 #if defined(LIBC_SCCS) && !defined(lint) 55 static char rcsid[] = "$OpenBSD: herror.c,v 1.3 1996/08/19 08:29:02 tholo Exp $"; 56 #endif /* LIBC_SCCS and not lint */ 57 58 #include <sys/types.h> 59 #include <sys/uio.h> 60 #include <netdb.h> 61 #include <unistd.h> 62 #include <string.h> 63 64 const char *h_errlist[] = { 65 "Resolver Error 0 (no error)", 66 "Unknown host", /* 1 HOST_NOT_FOUND */ 67 "Host name lookup failure", /* 2 TRY_AGAIN */ 68 "Unknown server error", /* 3 NO_RECOVERY */ 69 "No address associated with name", /* 4 NO_ADDRESS */ 70 }; 71 int h_nerr = { sizeof h_errlist / sizeof h_errlist[0] }; 72 73 extern int h_errno; 74 75 /* 76 * herror -- 77 * print the error indicated by the h_errno value. 78 */ 79 void 80 herror(s) 81 const char *s; 82 { 83 struct iovec iov[4]; 84 register struct iovec *v = iov; 85 86 if (s && *s) { 87 v->iov_base = (char *)s; 88 v->iov_len = strlen(s); 89 v++; 90 v->iov_base = ": "; 91 v->iov_len = 2; 92 v++; 93 } 94 v->iov_base = (char *)hstrerror(h_errno); 95 v->iov_len = strlen(v->iov_base); 96 v++; 97 v->iov_base = "\n"; 98 v->iov_len = 1; 99 writev(STDERR_FILENO, iov, (v - iov) + 1); 100 } 101 102 const char * 103 hstrerror(err) 104 int err; 105 { 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