128 lines
4.1 KiB
C
128 lines
4.1 KiB
C
/*-
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* SPDX-License-Identifier: (BSD-3-Clause AND ISC)
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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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/*
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* Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
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* Portions Copyright (c) 1996-1999 by Internet Software Consortium.
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*
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* Permission to use, copy, modify, and 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
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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* OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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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[] = "$Id: herror.c,v 1.4 2005/04/27 04:56:41 sra Exp $";
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#endif /* LIBC_SCCS and not lint */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "port_before.h"
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#include "namespace.h"
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#include <sys/param.h>
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#include <sys/uio.h>
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#include <netinet/in.h>
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#include <arpa/nameser.h>
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#include <netdb.h>
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#include <resolv.h>
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#include <string.h>
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#include <unistd.h>
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#include "un-namespace.h"
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#include "port_after.h"
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const char *h_errlist[] = {
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"Resolver 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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const int h_nerr = { nitems(h_errlist) };
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#undef h_errno
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int h_errno;
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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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herror(const char *s) {
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struct iovec iov[4], *v = iov;
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char *t;
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if (s != NULL && *s != '\0') {
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DE_CONST(s, t);
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v->iov_base = t;
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v->iov_len = strlen(t);
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v++;
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DE_CONST(": ", t);
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v->iov_base = t;
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v->iov_len = 2;
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v++;
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}
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DE_CONST(hstrerror(*__h_errno()), t);
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v->iov_base = t;
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v->iov_len = strlen(v->iov_base);
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v++;
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DE_CONST("\n", t);
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v->iov_base = t;
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v->iov_len = 1;
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_writev(STDERR_FILENO, iov, (v - iov) + 1);
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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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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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/*! \file */
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