134 lines
4.5 KiB
C
134 lines
4.5 KiB
C
/* $NetBSD: herror.c,v 1.4 2004/05/23 05:09:52 christos Exp $ */
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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#ifdef notdef
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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 1.2.206.1 2004/03/09 08:33:54 marka Exp";
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#else
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__RCSID("$NetBSD: herror.c,v 1.4 2004/05/23 05:09:52 christos Exp $");
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#endif
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#endif /* LIBC_SCCS and not lint */
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#include <sys/types.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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#ifdef ANDROID_CHANGES
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#include "resolv_private.h"
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#else
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#include <resolv.h>
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#endif
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#include <string.h>
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#include <unistd.h>
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#ifndef DE_CONST
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#define DE_CONST(c,v) v = ((c) ? \
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strchr((const void *)(c), *(const char *)(const void *)(c)) : NULL)
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#endif
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const char * const 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 = { 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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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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