7e6cabd06e
Renumber cluase 4 to 3, per what everybody else did when BSD granted them permission to remove clause 3. My insistance on keeping the same numbering for legal reasons is too pedantic, so give up on that point. Submitted by: Jan Schaumann <jschauma@stevens.edu> Pull Request: https://github.com/freebsd/freebsd/pull/96
126 lines
4.0 KiB
C
126 lines
4.0 KiB
C
/*
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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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