1 /* $NetBSD: db.c,v 1.18 2015/05/19 13:20:52 christos Exp $ */
2
3 /*-
4 * Copyright (c) 1991, 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. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #if HAVE_NBTOOL_CONFIG_H
33 #include "nbtool_config.h"
34 #endif
35
36 #include <sys/cdefs.h>
37 __RCSID("$NetBSD: db.c,v 1.18 2015/05/19 13:20:52 christos Exp $");
38
39 #include "namespace.h"
40 #include <sys/types.h>
41
42 #include <errno.h>
43 #include <fcntl.h>
44 #include <stddef.h>
45 #include <stdio.h>
46
47 #include <db.h>
48 static int __dberr(void);
49
50 #ifdef __weak_alias
__weak_alias(dbopen,_dbopen)51 __weak_alias(dbopen,_dbopen)
52 #endif
53
54 #ifndef O_CLOEXEC
55 #define O_CLOEXEC 0
56 #endif
57
58 DB *
59 dbopen(const char *fname, int flags, mode_t mode, DBTYPE type,
60 const void *openinfo)
61 {
62
63 #define DB_FLAGS (DB_LOCK | DB_SHMEM | DB_TXN)
64 #if defined(__minix)
65 #define USE_OPEN_FLAGS \
66 (O_CREAT | O_EXCL | O_NONBLOCK | O_RDONLY | \
67 O_RDWR | O_TRUNC | O_CLOEXEC)
68 #else
69 #define USE_OPEN_FLAGS \
70 (O_CREAT | O_EXCL | O_EXLOCK | O_NONBLOCK | O_RDONLY | \
71 O_RDWR | O_SHLOCK | O_TRUNC | O_CLOEXEC)
72 #endif /* defined(__minix) */
73
74 if ((flags & ~(USE_OPEN_FLAGS | DB_FLAGS)) == 0)
75 switch (type) {
76 case DB_BTREE:
77 return (__bt_open(fname, flags & USE_OPEN_FLAGS,
78 mode, openinfo, (int)(flags & DB_FLAGS)));
79 case DB_HASH:
80 return (__hash_open(fname, flags & USE_OPEN_FLAGS,
81 mode, openinfo, (int)(flags & DB_FLAGS)));
82 case DB_RECNO:
83 return (__rec_open(fname, flags & USE_OPEN_FLAGS,
84 mode, openinfo, (int)(flags & DB_FLAGS)));
85 }
86 errno = EINVAL;
87 return (NULL);
88 }
89
90 static int
__dberr(void)91 __dberr(void)
92 {
93 return (RET_ERROR);
94 }
95
96 /*
97 * __DBPANIC -- Stop.
98 *
99 * Parameters:
100 * dbp: pointer to the DB structure.
101 */
102 void
__dbpanic(DB * dbp)103 __dbpanic(DB *dbp)
104 {
105 /* The only thing that can succeed is a close. */
106 dbp->del = (int (*)(const struct __db *, const DBT*, u_int))__dberr;
107 dbp->fd = (int (*)(const struct __db *))__dberr;
108 dbp->get = (int (*)(const struct __db *, const DBT*, DBT *, u_int))__dberr;
109 dbp->put = (int (*)(const struct __db *, DBT *, const DBT *, u_int))__dberr;
110 dbp->seq = (int (*)(const struct __db *, DBT *, DBT *, u_int))__dberr;
111 dbp->sync = (int (*)(const struct __db *, u_int))__dberr;
112 }
113