00b67f09dd
Also known as ISC bind. This import adds utilities such as host(1), dig(1), and nslookup(1), as well as many other tools and libraries. Change-Id: I035ca46e64f1965d57019e773f4ff0ef035e4aa3
121 lines
4.2 KiB
C
121 lines
4.2 KiB
C
/* $NetBSD: herror.c,v 1.6 2014/12/10 04:38:02 christos Exp $ */
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/*
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* Portions Copyright (C) 2004, 2005, 2007, 2011, 2012, 2014 Internet Systems Consortium, Inc. ("ISC")
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* Portions Copyright (C) 2000, 2001, 2003 Internet Software Consortium.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
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* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
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* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
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* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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/*
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* Copyright (c) 1987, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*! \file herror.c
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lwres_herror() prints the string s on stderr followed by the string
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generated by lwres_hstrerror() for the error code stored in the global
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variable lwres_h_errno.
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lwres_hstrerror() returns an appropriate string for the error code
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gievn by err. The values of the error codes and messages are as
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follows:
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\li #NETDB_SUCCESS: Resolver Error 0 (no error)
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\li #HOST_NOT_FOUND: Unknown host
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\li #TRY_AGAIN: Host name lookup failure
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\li #NO_RECOVERY: Unknown server error
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\li #NO_DATA: No address associated with name
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static const char sccsid[] = "@(#)herror.c 8.1 (Berkeley) 6/4/93";
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static const char rcsid[] =
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"Id";
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#endif /* LIBC_SCCS and not lint */
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#include <config.h>
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#include <stdio.h>
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#include <lwres/netdb.h>
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#include <lwres/platform.h>
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LIBLWRES_EXTERNAL_DATA int lwres_h_errno;
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/*!
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* these have never been declared in any header file so make them static
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*/
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static const char *h_errlist[] = {
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"Resolver Error 0 (no error)", /*%< 0 no error */
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"Unknown host", /*%< 1 HOST_NOT_FOUND */
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"Host name lookup failure", /*%< 2 TRY_AGAIN */
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"Unknown server error", /*%< 3 NO_RECOVERY */
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"No address associated with name", /*%< 4 NO_ADDRESS */
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};
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static int h_nerr = sizeof(h_errlist) / sizeof(h_errlist[0]);
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/*!
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* herror --
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* print the error indicated by the h_errno value.
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*/
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void
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lwres_herror(const char *s) {
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fprintf(stderr, "%s: %s\n", s, lwres_hstrerror(lwres_h_errno));
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}
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/*!
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* hstrerror --
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* return the string associated with a given "host" errno value.
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*/
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const char *
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lwres_hstrerror(int err) {
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if (err < 0)
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return ("Resolver internal error");
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else if (err < h_nerr)
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return (h_errlist[err]);
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return ("Unknown resolver error");
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}
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