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Annotation of src/lib/libc/resolv/res_compat.c, Revision 1.2

1.2     ! martin      1: /*     $NetBSD: res_compat.c,v 1.1 2004/06/09 18:07:03 christos Exp $  */
1.1       christos    2:
                      3: /*-
                      4:  * Copyright (c) 2004 The NetBSD Foundation, Inc.
                      5:  * All rights reserved.
                      6:  *
                      7:  * This code is derived from software contributed to The NetBSD Foundation
                      8:  * by Christos Zoulas.
                      9:  *
                     10:  * Redistribution and use in source and binary forms, with or without
                     11:  * modification, are permitted provided that the following conditions
                     12:  * are met:
                     13:  * 1. Redistributions of source code must retain the above copyright
                     14:  *    notice, this list of conditions and the following disclaimer.
                     15:  * 2. Redistributions in binary form must reproduce the above copyright
                     16:  *    notice, this list of conditions and the following disclaimer in the
                     17:  *    documentation and/or other materials provided with the distribution.
                     18:  *
                     19:  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
                     20:  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
                     21:  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
                     22:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
                     23:  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
                     24:  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
                     25:  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
                     26:  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
                     27:  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
                     28:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
                     29:  * POSSIBILITY OF SUCH DAMAGE.
                     30:  */
                     31:
                     32: #include <sys/cdefs.h>
                     33: #if defined(LIBC_SCCS) && !defined(lint)
1.2     ! martin     34: __RCSID("$NetBSD: res_compat.c,v 1.1 2004/06/09 18:07:03 christos Exp $");
1.1       christos   35: #endif
                     36:
                     37: #include <sys/types.h>
                     38: #include <arpa/inet.h>
                     39: #include <arpa/nameser.h>
                     40: #include <netdb.h>
                     41: #include <string.h>
                     42: #define __OLD_RES_STATE
                     43: #include <resolv.h>
                     44:
                     45: #undef _res
                     46:
                     47: /*
                     48:  * Binary Compatibility; this symbol does not appear in a header file
                     49:  * Most userland programs use this to set res_options before res_init()
                     50:  * is called. There are hooks to res_init() to consult the data in this
                     51:  * structure. The hooks are provided indirectly by the two functions below.
                     52:  * We depend on the fact the the first 440 [32 bit machines] bytes are
                     53:  * shared between the two structures.
                     54:  */
                     55: #ifndef __BIND_NOSTATIC
                     56: struct __res_state _res
                     57: #if defined(__BIND_RES_TEXT)
                     58:        = { RES_TIMEOUT, }      /* Motorola, et al. */
                     59: # endif
                     60: ;
                     61:
                     62: void *__res_get_old_state(void);
                     63: void __res_put_old_state(void *);
                     64:
                     65: void *
                     66: __res_get_old_state(void)
                     67: {
                     68:        return &_res;
                     69: }
                     70:
                     71: void
                     72: __res_put_old_state(void *res)
                     73: {
                     74:        (void)memcpy(&_res, res, sizeof(_res));
                     75: }
                     76: #endif

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