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File: [cvs.NetBSD.org] / src / lib / libc / resolv / herror.c (download)

Revision 1.10, Tue Feb 24 17:56:20 2015 UTC (5 years, 6 months ago) by christos
Branch: MAIN
CVS Tags: prg-localcount2-base3, prg-localcount2-base2, prg-localcount2-base1, prg-localcount2-base, prg-localcount2, phil-wifi-base, phil-wifi-20200421, phil-wifi-20200411, phil-wifi-20200406, phil-wifi-20191119, phil-wifi-20190609, phil-wifi, pgoyette-localcount-base, pgoyette-localcount-20170426, pgoyette-localcount-20170320, pgoyette-localcount-20170107, pgoyette-localcount-20161104, pgoyette-localcount-20160806, pgoyette-localcount-20160726, pgoyette-localcount, pgoyette-compat-merge-20190127, pgoyette-compat-base, pgoyette-compat-20190127, pgoyette-compat-20190118, pgoyette-compat-1226, pgoyette-compat-1126, pgoyette-compat-1020, pgoyette-compat-0930, pgoyette-compat-0906, pgoyette-compat-0728, pgoyette-compat-0625, pgoyette-compat-0521, pgoyette-compat-0502, pgoyette-compat-0422, pgoyette-compat-0415, pgoyette-compat-0407, pgoyette-compat-0330, pgoyette-compat-0322, pgoyette-compat-0315, pgoyette-compat, perseant-stdc-iso10646-base, perseant-stdc-iso10646, netbsd-9-base, netbsd-9-0-RELEASE, netbsd-9-0-RC2, netbsd-9-0-RC1, netbsd-9, netbsd-8-base, netbsd-8-2-RELEASE, netbsd-8-1-RELEASE, netbsd-8-1-RC1, netbsd-8-0-RELEASE, netbsd-8-0-RC2, netbsd-8-0-RC1, netbsd-8, matt-nb8-mediatek-base, matt-nb8-mediatek, localcount-20160914, is-mlppp-base, is-mlppp, bouyer-socketcan-base1, bouyer-socketcan-base, bouyer-socketcan, HEAD
Changes since 1.9: +3 -7 lines

belated removal of the advertising clause.

/*	$NetBSD: herror.c,v 1.10 2015/02/24 17:56:20 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. 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 1.4 2005/04/27 04:56:41 sra Exp";
#else
__RCSID("$NetBSD: herror.c,v 1.10 2015/02/24 17:56:20 christos Exp $");
#endif
#endif /* LIBC_SCCS and not lint */

#include "port_before.h"

#include "namespace.h"
#include <sys/types.h>
#include <sys/param.h>
#include <sys/uio.h>

#include <netinet/in.h>
#include <arpa/nameser.h>

#include <netdb.h>
#include <resolv.h>
#include <string.h>
#include <unistd.h>

#include "port_after.h"

const char *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 */
};
int	h_nerr = { sizeof h_errlist / sizeof h_errlist[0] };

#if !(__GLIBC__ > 2 || __GLIBC__ == 2 &&  __GLIBC_MINOR__ >= 3)
#undef	h_errno
int	h_errno;
#endif

#ifdef __weak_alias
__weak_alias(herror,_herror)
#endif

/*%
 * 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;
	(void)writev(STDERR_FILENO, iov, (int)((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");
}

/*! \file */