hstrerror.c
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上传日期:2007-01-04
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- /* $Id: hstrerror.c,v 1.3 1999/05/13 16:35:55 karls Exp $ */
- #ifdef HAVE_CONFIG_H
- #include "autoconf.h"
- #endif /* HAVE_CONFIG_H */
- #include "common.h"
- #if !HAVE_HSTRERROR
- /* $OpenBSD: herror.c,v 1.4 1997/03/13 19:07:28 downsj Exp $ */
- /*
- * ++Copyright++ 1987, 1993
- * -
- * 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.
- * -
- * Portions Copyright (c) 1993 by Digital Equipment Corporation.
- *
- * 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, and that
- * the name of Digital Equipment Corporation not be used in advertising or
- * publicity pertaining to distribution of the document or software without
- * specific, written prior permission.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
- * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
- * CORPORATION 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.
- * -
- * --Copyright--
- */
- #if defined(LIBC_SCCS) && !defined(lint)
- #if 0
- static char sccsid[] = "@(#)herror.c 8.1 (Berkeley) 6/4/93";
- static char rcsid[] = "$From: herror.c,v 8.3 1996/08/05 08:31:35 vixie Exp $";
- #else
- static char rcsid[] = "$OpenBSD: herror.c,v 1.4 1997/03/13 19:07:28 downsj Exp $";
- #endif
- #endif /* LIBC_SCCS and not lint */
- #ifndef _COMMON_H_
- #include <sys/types.h>
- #include <sys/param.h>
- #include <sys/uio.h>
- #include <netdb.h>
- #if HAVE_UNISTD_H
- #include <unistd.h>
- #endif /* HAVE_UNISTD_H */
- #include <string.h>
- #endif /* !_COMMON_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] };
- extern int h_errno;
- #if 0
- /*
- * herror --
- * print the error indicated by the h_errno value.
- */
- void
- herror(s)
- const char *s;
- {
- struct iovec iov[4];
- register struct iovec *v = iov;
- if (s && *s) {
- v->iov_base = (char *)s;
- v->iov_len = strlen(s);
- v++;
- v->iov_base = ": ";
- v->iov_len = 2;
- v++;
- }
- v->iov_base = (char *)hstrerror(h_errno);
- v->iov_len = strlen(v->iov_base);
- v++;
- v->iov_base = "n";
- v->iov_len = 1;
- writev(STDERR_FILENO, iov, (v - iov) + 1);
- }
- #endif
- const char *
- hstrerror(err)
- int err;
- {
- if (err < 0)
- return ("Resolver internal error");
- else if (err < h_nerr)
- return (h_errlist[err]);
- return ("Unknown resolver error");
- }
- #else
- static void avoid_error __P((void));
- static void avoid_error()
- {
- avoid_error();
- }
- #endif /* !HAVE_HSTRERROR */