/* * Portions Copyright (C) 2004, 2005, 2007, 2011, 2012 Internet Systems Consortium, Inc. ("ISC") * Portions Copyright (C) 2000, 2001, 2003 Internet Software Consortium. * * Permission to use, copy, modify, and/or distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR * PERFORMANCE OF THIS SOFTWARE. */ /* * Copyright (c) 1987, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /*! \file herror.c lwres_herror() prints the string s on stderr followed by the string generated by lwres_hstrerror() for the error code stored in the global variable lwres_h_errno. lwres_hstrerror() returns an appropriate string for the error code gievn by err. The values of the error codes and messages are as follows: \li #NETDB_SUCCESS: Resolver Error 0 (no error) \li #HOST_NOT_FOUND: Unknown host \li #TRY_AGAIN: Host name lookup failure \li #NO_RECOVERY: Unknown server error \li #NO_DATA: No address associated with name */ #if defined(LIBC_SCCS) && !defined(lint) static const char sccsid[] = "@(#)herror.c 8.1 (Berkeley) 6/4/93"; static const char rcsid[] = "$Id$"; #endif /* LIBC_SCCS and not lint */ #include <config.h> #include <stdio.h> #include <lwres/netdb.h> #include <lwres/platform.h> LIBLWRES_EXTERNAL_DATA int lwres_h_errno; /*! * these have never been declared in any header file so make them static */ static const char *h_errlist[] = { "Resolver Error 0 (no error)", /*%< 0 no error */ "Unknown host", /*%< 1 HOST_NOT_FOUND */ "Host name lookup failure", /*%< 2 TRY_AGAIN */ "Unknown server error", /*%< 3 NO_RECOVERY */ "No address associated with name", /*%< 4 NO_ADDRESS */ }; static int h_nerr = sizeof(h_errlist) / sizeof(h_errlist[0]); /*! * herror -- * print the error indicated by the h_errno value. */ void lwres_herror(const char *s) { fprintf(stderr, "%s: %s\n", s, lwres_hstrerror(lwres_h_errno)); } /*! * hstrerror -- * return the string associated with a given "host" errno value. */ const char * lwres_hstrerror(int err) { if (err < 0) return ("Resolver internal error"); else if (err < h_nerr) return (h_errlist[err]); return ("Unknown resolver error"); }