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+/*
+ * Portions Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+/*
+ * 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.
+ */
+
+/*! \file herror.c
+ lwres_herror() prints the string s on stderr followed by the string
+ generated by lwres_hstrerror() for the error code stored in the global
+ variable lwres_h_errno.
+
+ lwres_hstrerror() returns an appropriate string for the error code
+ gievn by err. The values of the error codes and messages are as
+ follows:
+
+\li #NETDB_SUCCESS: Resolver Error 0 (no error)
+
+\li #HOST_NOT_FOUND: Unknown host
+
+\li #TRY_AGAIN: Host name lookup failure
+
+\li #NO_RECOVERY: Unknown server error
+
+\li #NO_DATA: No address associated with name
+
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static const char sccsid[] = "@(#)herror.c 8.1 (Berkeley) 6/4/93";
+static const char rcsid[] =
+ "$Id$";
+#endif /* LIBC_SCCS and not lint */
+
+#include <config.h>
+
+#include <stdio.h>
+
+#include <isc/print.h>
+
+#include <lwres/netdb.h>
+#include <lwres/platform.h>
+
+LIBLWRES_EXTERNAL_DATA int lwres_h_errno;
+
+/*!
+ * these have never been declared in any header file so make them static
+ */
+
+static const char *h_errlist[] = {
+ "Resolver Error 0 (no 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 */
+};
+
+static int h_nerr = sizeof(h_errlist) / sizeof(h_errlist[0]);
+
+
+/*!
+ * herror --
+ * print the error indicated by the h_errno value.
+ */
+void
+lwres_herror(const char *s) {
+ fprintf(stderr, "%s: %s\n", s, lwres_hstrerror(lwres_h_errno));
+}
+
+/*!
+ * hstrerror --
+ * return the string associated with a given "host" errno value.
+ */
+const char *
+lwres_hstrerror(int err) {
+ if (err < 0)
+ return ("Resolver internal error");
+ else if (err < h_nerr)
+ return (h_errlist[err]);
+ return ("Unknown resolver error");
+}