herror.c revision 156952
1133359Sobrien/* 2133359Sobrien * Copyright (c) 1987, 1993 368349Sobrien * The Regents of the University of California. All rights reserved. 4133359Sobrien * 5133359Sobrien * Redistribution and use in source and binary forms, with or without 668349Sobrien * modification, are permitted provided that the following conditions 768349Sobrien * are met: 868349Sobrien * 1. Redistributions of source code must retain the above copyright 968349Sobrien * notice, this list of conditions and the following disclaimer. 1068349Sobrien * 2. Redistributions in binary form must reproduce the above copyright 1168349Sobrien * notice, this list of conditions and the following disclaimer in the 1268349Sobrien * documentation and/or other materials provided with the distribution. 1368349Sobrien * 3. All advertising materials mentioning features or use of this software 1468349Sobrien * must display the following acknowledgement: 15133359Sobrien * This product includes software developed by the University of 1668349Sobrien * California, Berkeley and its contributors. 1768349Sobrien * 4. Neither the name of the University nor the names of its contributors 1868349Sobrien * may be used to endorse or promote products derived from this software 1968349Sobrien * without specific prior written permission. 2068349Sobrien * 2168349Sobrien * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2268349Sobrien * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23133359Sobrien * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2468349Sobrien * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25133359Sobrien * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2668349Sobrien * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27133359Sobrien * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28133359Sobrien * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29133359Sobrien * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30133359Sobrien * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31133359Sobrien * SUCH DAMAGE. 3268349Sobrien */ 3368349Sobrien 3468349Sobrien/* 3568349Sobrien * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC") 3668349Sobrien * Portions Copyright (c) 1996-1999 by Internet Software Consortium. 3768349Sobrien * 38133359Sobrien * Permission to use, copy, modify, and distribute this software for any 39133359Sobrien * purpose with or without fee is hereby granted, provided that the above 40133359Sobrien * copyright notice and this permission notice appear in all copies. 41133359Sobrien * 42133359Sobrien * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES 43133359Sobrien * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 44133359Sobrien * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR 45133359Sobrien * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 46133359Sobrien * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 4768349Sobrien * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT 48133359Sobrien * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 49133359Sobrien */ 50133359Sobrien 51133359Sobrien#if defined(LIBC_SCCS) && !defined(lint) 52133359Sobrienstatic const char sccsid[] = "@(#)herror.c 8.1 (Berkeley) 6/4/93"; 53133359Sobrienstatic const char rcsid[] = "$Id: herror.c,v 1.2.206.1 2004/03/09 08:33:54 marka Exp $"; 54133359Sobrien#endif /* LIBC_SCCS and not lint */ 55133359Sobrien 56133359Sobrien#include "port_before.h" 57133359Sobrien 58133359Sobrien#include <sys/types.h> 59133359Sobrien#include <sys/param.h> 60133359Sobrien#include <sys/uio.h> 61133359Sobrien 62133359Sobrien#include <netinet/in.h> 63133359Sobrien#include <arpa/nameser.h> 64133359Sobrien 65133359Sobrien#include <netdb.h> 66133359Sobrien#include <resolv.h> 67133359Sobrien#include <string.h> 68133359Sobrien#include <unistd.h> 69133359Sobrien#include <irs.h> 7068349Sobrien 71133359Sobrien#include "port_after.h" 72133359Sobrien 73133359Sobrienconst char *h_errlist[] = { 74133359Sobrien "Resolver Error 0 (no error)", 7568349Sobrien "Unknown host", /* 1 HOST_NOT_FOUND */ 76133359Sobrien "Host name lookup failure", /* 2 TRY_AGAIN */ 7768349Sobrien "Unknown server error", /* 3 NO_RECOVERY */ 78133359Sobrien "No address associated with name", /* 4 NO_ADDRESS */ 79133359Sobrien}; 80133359Sobrienint h_nerr = { sizeof h_errlist / sizeof h_errlist[0] }; 81133359Sobrien 82133359Sobrien#if !(__GLIBC__ > 2 || __GLIBC__ == 2 && __GLIBC_MINOR__ >= 3) 83133359Sobrien#undef h_errno 84133359Sobrienint h_errno; 85133359Sobrien#endif 86133359Sobrien 87133359Sobrien/* 8868349Sobrien * herror -- 89133359Sobrien * print the error indicated by the h_errno value. 90133359Sobrien */ 91133359Sobrienvoid 92133359Sobrienherror(const char *s) { 93133359Sobrien struct iovec iov[4], *v = iov; 94133359Sobrien char *t; 95133359Sobrien 96133359Sobrien if (s != NULL && *s != '\0') { 97133359Sobrien DE_CONST(s, t); 98133359Sobrien v->iov_base = t; 99133359Sobrien v->iov_len = strlen(t); 100133359Sobrien v++; 101133359Sobrien DE_CONST(": ", t); 102133359Sobrien v->iov_base = t; 103133359Sobrien v->iov_len = 2; 104133359Sobrien v++; 10580588Sobrien } 106133359Sobrien DE_CONST(hstrerror(*__h_errno()), t); 107133359Sobrien v->iov_base = t; 108133359Sobrien v->iov_len = strlen(v->iov_base); 109133359Sobrien v++; 110133359Sobrien DE_CONST("\n", t); 111133359Sobrien v->iov_base = t; 112133359Sobrien v->iov_len = 1; 113133359Sobrien writev(STDERR_FILENO, iov, (v - iov) + 1); 114133359Sobrien} 115133359Sobrien 116133359Sobrien/* 117133359Sobrien * hstrerror -- 118133359Sobrien * return the string associated with a given "host" errno value. 119133359Sobrien */ 120133359Sobrienconst char * 121133359Sobrienhstrerror(int err) { 122133359Sobrien if (err < 0) 123133359Sobrien return ("Resolver internal error"); 124133359Sobrien else if (err < h_nerr) 125133359Sobrien return (h_errlist[err]); 12668349Sobrien return ("Unknown resolver error"); 127133359Sobrien} 12868349Sobrien