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Commit	Line	Data
	1	/*
	2	* ++Copyright++ 1987, 1993
	3	* -
	4	* Copyright (c) 1987, 1993
	5	* The Regents of the University of California. All rights reserved.
	6	*
	7	* Redistribution and use in source and binary forms, with or without
	8	* modification, are permitted provided that the following conditions
	9	* are met:
	10	* 1. Redistributions of source code must retain the above copyright
	11	* notice, this list of conditions and the following disclaimer.
	12	* 2. Redistributions in binary form must reproduce the above copyright
	13	* notice, this list of conditions and the following disclaimer in the
	14	* documentation and/or other materials provided with the distribution.
	15	* 3. All advertising materials mentioning features or use of this software
	16	* must display the following acknowledgement:
	17	* This product includes software developed by the University of
	18	* California, Berkeley and its contributors.
	19	* 4. Neither the name of the University nor the names of its contributors
	20	* may be used to endorse or promote products derived from this software
	21	* without specific prior written permission.
	22	*
	23	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	24	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	25	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	26	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	27	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	28	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	29	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	30	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	31	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	32	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	33	* SUCH DAMAGE.
	34	* -
	35	* Portions Copyright (c) 1993 by Digital Equipment Corporation.
	36	*
	37	* Permission to use, copy, modify, and distribute this software for any
	38	* purpose with or without fee is hereby granted, provided that the above
	39	* copyright notice and this permission notice appear in all copies, and that
	40	* the name of Digital Equipment Corporation not be used in advertising or
	41	* publicity pertaining to distribution of the document or software without
	42	* specific, written prior permission.
	43	*
	44	* THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
	45	* WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
	46	* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
	47	* CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
	48	* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
	49	* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
	50	* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
	51	* SOFTWARE.
	52	* -
	53	* --Copyright--
	54	*/
	55
	56	#if defined(LIBC_SCCS) && !defined(lint)
	57	static char sccsid[] = "@(#)herror.c 8.1 (Berkeley) 6/4/93";
	58	static char rcsid[] = "$Id: herror.c,v 1.4 2003/04/10 20:21:16 majka Exp $";
	59	#endif /* LIBC_SCCS and not lint */
	60
	61	#include <sys/param.h>
	62	#include <sys/uio.h>
	63	#include <netdb.h>
	64	#include <string.h>
	65	#include <unistd.h>
	66
	67	const char * const h_errlist[] = {
	68	"Resolver Error 0 (no error)",
	69	"Unknown host", /* 1 HOST_NOT_FOUND */
	70	"Host name lookup failure", /* 2 TRY_AGAIN */
	71	"Unknown server error", /* 3 NO_RECOVERY */
	72	"No address associated with name", /* 4 NO_ADDRESS */
	73	};
	74	const int h_nerr = { sizeof h_errlist / sizeof h_errlist[0] };
	75
	76	int h_errno;
	77
	78	/*
	79	* herror --
	80	* print the error indicated by the h_errno value.
	81	*/
	82	void
	83	herror(const char *s)
	84	{
	85	struct iovec iov[4];
	86	register struct iovec *v = iov;
	87
	88	if (s && *s) {
	89	v->iov_base = (char *)s;
	90	v->iov_len = strlen(s);
	91	v++;
	92	v->iov_base = ": ";
	93	v->iov_len = 2;
	94	v++;
	95	}
	96	v->iov_base = (char *)hstrerror(h_errno);
	97	v->iov_len = strlen(v->iov_base);
	98	v++;
	99	v->iov_base = "\n";
	100	v->iov_len = 1;
	101	writev(STDERR_FILENO, iov, (v - iov) + 1);
	102	}
	103
	104	const char *
	105	hstrerror(int err)
	106	{
	107	if (err < 0)
	108	return ("Resolver internal error");
	109	else if (err < h_nerr)
	110	return ((char *)h_errlist[err]);
	111	return ("Unknown resolver error");
	112	}