1 /* 2 * Copyright 1997-2002 Sun Microsystems, Inc. All rights reserved. 3 * Use is subject to license terms. 4 */ 5 6 /* 7 * Copyright (c) 1987, 1993 8 * The Regents of the University of California. All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 */ 38 39 /* 40 * Portions Copyright (c) 1996-1999 by Internet Software Consortium. 41 * 42 * Permission to use, copy, modify, and distribute this software for any 43 * purpose with or without fee is hereby granted, provided that the above 44 * copyright notice and this permission notice appear in all copies. 45 * 46 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS 47 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES 48 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE 49 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 50 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 51 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 52 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 53 * SOFTWARE. 54 */ 55 56 #pragma ident "%Z%%M% %I% %E% SMI" 57 58 #if defined(LIBC_SCCS) && !defined(lint) 59 static const char sccsid[] = "@(#)herror.c 8.1 (Berkeley) 6/4/93"; 60 static const char rcsid[] = "$Id: herror.c,v 8.13 2001/06/18 14:44:06 marka Exp $"; 61 #endif /* LIBC_SCCS and not lint */ 62 63 #include "port_before.h" 64 65 #include <sys/types.h> 66 #include <sys/param.h> 67 #include <sys/uio.h> 68 69 #include <netinet/in.h> 70 #include <arpa/nameser.h> 71 72 #include <netdb.h> 73 #include <resolv.h> 74 #include <string.h> 75 #include <unistd.h> 76 #include <irs.h> 77 78 #include "port_after.h" 79 #undef h_errno 80 81 const char *h_errlist[] = { 82 "Resolver Error 0 (no error)", 83 "Unknown host", /* 1 HOST_NOT_FOUND */ 84 "Host name lookup failure", /* 2 TRY_AGAIN */ 85 "Unknown server error", /* 3 NO_RECOVERY */ 86 "No address associated with name", /* 4 NO_ADDRESS */ 87 }; 88 int h_nerr = { sizeof h_errlist / sizeof h_errlist[0] }; 89 90 int h_errno; 91 92 /* 93 * herror -- 94 * print the error indicated by the h_errno value. 95 */ 96 void 97 herror(const char *s) { 98 struct iovec iov[4], *v = iov; 99 char *t; 100 101 if (s != NULL && *s != '\0') { 102 DE_CONST(s, t); 103 v->iov_base = t; 104 v->iov_len = strlen(t); 105 v++; 106 DE_CONST(": ", t); 107 v->iov_base = t; 108 v->iov_len = 2; 109 v++; 110 } 111 DE_CONST(hstrerror(*__h_errno()), t); 112 v->iov_base = t; 113 v->iov_len = strlen(v->iov_base); 114 v++; 115 DE_CONST("\n", t); 116 v->iov_base = t; 117 v->iov_len = 1; 118 writev(STDERR_FILENO, iov, (v - iov) + 1); 119 } 120 121 /* 122 * hstrerror -- 123 * return the string associated with a given "host" errno value. 124 */ 125 const char * 126 hstrerror(int err) { 127 if (err < 0) 128 return ("Resolver internal error"); 129 else if (err < h_nerr) 130 return (h_errlist[err]); 131 return ("Unknown resolver error"); 132 } 133