1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
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 #include <sys/types.h>
33
34 #include <errno.h>
35 #include <fcntl.h>
36 #include <stddef.h>
37 #include <stdio.h>
38
39 #include <db.h>
40
41 static int __dberr(void);
42
43 #ifndef O_CLOEXEC
44 #define O_CLOEXEC 0
45 #endif
46 #ifndef O_EXLOCK
47 #define O_EXLOCK 0
48 #endif
49 #ifndef O_SHLOCK
50 #define O_SHLOCK 0
51 #endif
52
53 DB *
dbopen(const char * fname,int flags,int mode,DBTYPE type,const void * openinfo)54 dbopen(const char *fname, int flags, int mode, DBTYPE type, const void *openinfo)
55 {
56
57 #define DB_FLAGS (DB_LOCK | DB_SHMEM | DB_TXN)
58 #define USE_OPEN_FLAGS \
59 (O_CREAT | O_EXCL | O_EXLOCK | O_NOFOLLOW | O_NONBLOCK | \
60 O_RDONLY | O_RDWR | O_SHLOCK | O_SYNC | O_TRUNC | O_CLOEXEC)
61
62 if ((flags & ~(USE_OPEN_FLAGS | DB_FLAGS)) == 0)
63 switch (type) {
64 case DB_BTREE:
65 return (__bt_open(fname, flags & USE_OPEN_FLAGS,
66 mode, openinfo, flags & DB_FLAGS));
67 case DB_HASH:
68 return (__hash_open(fname, flags & USE_OPEN_FLAGS,
69 mode, openinfo, flags & DB_FLAGS));
70 case DB_RECNO:
71 return (__rec_open(fname, flags & USE_OPEN_FLAGS,
72 mode, openinfo, flags & DB_FLAGS));
73 }
74 errno = EINVAL;
75 return (NULL);
76 }
77
78 static int
__dberr(void)79 __dberr(void)
80 {
81 return (RET_ERROR);
82 }
83
84 /*
85 * __DBPANIC -- Stop.
86 *
87 * Parameters:
88 * dbp: pointer to the DB structure.
89 */
90 void
__dbpanic(DB * dbp)91 __dbpanic(DB *dbp)
92 {
93 /* The only thing that can succeed is a close. */
94 dbp->del = (int (*)(const struct __db *, const DBT*, u_int))__dberr;
95 dbp->fd = (int (*)(const struct __db *))__dberr;
96 dbp->get = (int (*)(const struct __db *, const DBT*, DBT *, u_int))__dberr;
97 dbp->put = (int (*)(const struct __db *, DBT *, const DBT *, u_int))__dberr;
98 dbp->seq = (int (*)(const struct __db *, DBT *, DBT *, u_int))__dberr;
99 dbp->sync = (int (*)(const struct __db *, u_int))__dberr;
100 }
101