1/*-
2 * Copyright (c) 1991, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#if defined(LIBC_SCCS) && !defined(lint)
31static char sccsid[] = "@(#)db.c	8.4 (Berkeley) 2/21/94";
32#endif /* LIBC_SCCS and not lint */
33#include <sys/cdefs.h>
34__FBSDID("$FreeBSD$");
35
36#include <sys/types.h>
37
38#include <errno.h>
39#include <fcntl.h>
40#include <stddef.h>
41#include <stdio.h>
42
43#include <db.h>
44
45static int __dberr(void);
46
47DB *
48dbopen(const char *fname, int flags, int mode, DBTYPE type, const void *openinfo)
49{
50
51#define	DB_FLAGS	(DB_LOCK | DB_SHMEM | DB_TXN)
52#define	USE_OPEN_FLAGS							\
53	(O_CREAT | O_EXCL | O_EXLOCK | O_NOFOLLOW | O_NONBLOCK | 	\
54	 O_RDONLY | O_RDWR | O_SHLOCK | O_SYNC | O_TRUNC)
55
56	if ((flags & ~(USE_OPEN_FLAGS | DB_FLAGS)) == 0)
57		switch (type) {
58		case DB_BTREE:
59			return (__bt_open(fname, flags & USE_OPEN_FLAGS,
60			    mode, openinfo, flags & DB_FLAGS));
61		case DB_HASH:
62			return (__hash_open(fname, flags & USE_OPEN_FLAGS,
63			    mode, openinfo, flags & DB_FLAGS));
64		case DB_RECNO:
65			return (__rec_open(fname, flags & USE_OPEN_FLAGS,
66			    mode, openinfo, flags & DB_FLAGS));
67		}
68	errno = EINVAL;
69	return (NULL);
70}
71
72static int
73__dberr(void)
74{
75	return (RET_ERROR);
76}
77
78/*
79 * __DBPANIC -- Stop.
80 *
81 * Parameters:
82 *	dbp:	pointer to the DB structure.
83 */
84void
85__dbpanic(DB *dbp)
86{
87	/* The only thing that can succeed is a close. */
88	dbp->del = (int (*)(const struct __db *, const DBT*, u_int))__dberr;
89	dbp->fd = (int (*)(const struct __db *))__dberr;
90	dbp->get = (int (*)(const struct __db *, const DBT*, DBT *, u_int))__dberr;
91	dbp->put = (int (*)(const struct __db *, DBT *, const DBT *, u_int))__dberr;
92	dbp->seq = (int (*)(const struct __db *, DBT *, DBT *, u_int))__dberr;
93	dbp->sync = (int (*)(const struct __db *, u_int))__dberr;
94}
95