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/* $NetBSD: herror.c,v 1.4 2004/05/23 05:09:52 christos Exp $ */
/*
* 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.
*/
/*
* Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
* Portions Copyright (c) 1996-1999 by Internet Software Consortium.
*
* Permission to use, copy, modify, and 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.
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
#ifdef notdef
static const char sccsid[] = "@(#)herror.c 8.1 (Berkeley) 6/4/93";
static const char rcsid[] = "Id: herror.c,v 1.2.206.1 2004/03/09 08:33:54 marka Exp";
#else
__RCSID("$NetBSD: herror.c,v 1.4 2004/05/23 05:09:52 christos Exp $");
#endif
#endif /* LIBC_SCCS and not lint */
#include <sys/types.h>
#include <sys/param.h>
#include <sys/uio.h>
#include <netinet/in.h>
#include "arpa_nameser.h"
#include <netdb.h>
#ifdef ANDROID_CHANGES
#include "resolv_private.h"
#else
#include <resolv.h>
#endif
#include <string.h>
#include <unistd.h>
#ifndef DE_CONST
#define DE_CONST(c,v) v = ((c) ? \
strchr((const void *)(c), *(const char *)(const void *)(c)) : NULL)
#endif
const char * const h_errlist[] = {
"Resolver 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 */
};
const int h_nerr = { sizeof h_errlist / sizeof h_errlist[0] };
/*
* herror --
* print the error indicated by the h_errno value.
*/
void
herror(const char *s) {
struct iovec iov[4], *v = iov;
char *t;
if (s != NULL && *s != '\0') {
DE_CONST(s, t);
v->iov_base = t;
v->iov_len = strlen(t);
v++;
DE_CONST(": ", t);
v->iov_base = t;
v->iov_len = 2;
v++;
}
DE_CONST(hstrerror(h_errno), t);
v->iov_base = t;
v->iov_len = strlen(v->iov_base);
v++;
DE_CONST("\n", t);
v->iov_base = t;
v->iov_len = 1;
writev(STDERR_FILENO, iov, (v - iov) + 1);
}
/*
* hstrerror --
* return the string associated with a given "host" errno value.
*/
const char *
hstrerror(int err) {
if (err < 0)
return ("Resolver internal error");
else if (err < h_nerr)
return (h_errlist[err]);
return ("Unknown resolver error");
}
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