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 #if defined(LIBC_SCCS) && !defined(lint)
33 static char sccsid[] = "@(#)db.c 8.4 (Berkeley) 2/21/94";
34 #endif /* LIBC_SCCS and not lint */
35 #include <sys/types.h>
36
37 #include <errno.h>
38 #include <fcntl.h>
39 #include <stddef.h>
40 #include <stdio.h>
41
42 #include <db.h>
43
44 static int __dberr(void);
45
46 #ifndef O_CLOEXEC
47 #define O_CLOEXEC 0
48 #endif
49 #ifndef O_EXLOCK
50 #define O_EXLOCK 0
51 #endif
52 #ifndef O_SHLOCK
53 #define O_SHLOCK 0
54 #endif
55
56 DB *
dbopen(const char * fname,int flags,int mode,DBTYPE type,const void * openinfo)57 dbopen(const char *fname, int flags, int mode, DBTYPE type, const void *openinfo)
58 {
59
60 #define DB_FLAGS (DB_LOCK | DB_SHMEM | DB_TXN)
61 #define USE_OPEN_FLAGS \
62 (O_CREAT | O_EXCL | O_EXLOCK | O_NOFOLLOW | O_NONBLOCK | \
63 O_RDONLY | O_RDWR | O_SHLOCK | O_SYNC | O_TRUNC | O_CLOEXEC)
64
65 if ((flags & ~(USE_OPEN_FLAGS | DB_FLAGS)) == 0)
66 switch (type) {
67 case DB_BTREE:
68 return (__bt_open(fname, flags & USE_OPEN_FLAGS,
69 mode, openinfo, flags & DB_FLAGS));
70 case DB_HASH:
71 return (__hash_open(fname, flags & USE_OPEN_FLAGS,
72 mode, openinfo, flags & DB_FLAGS));
73 case DB_RECNO:
74 return (__rec_open(fname, flags & USE_OPEN_FLAGS,
75 mode, openinfo, flags & DB_FLAGS));
76 }
77 errno = EINVAL;
78 return (NULL);
79 }
80
81 static int
__dberr(void)82 __dberr(void)
83 {
84 return (RET_ERROR);
85 }
86
87 /*
88 * __DBPANIC -- Stop.
89 *
90 * Parameters:
91 * dbp: pointer to the DB structure.
92 */
93 void
__dbpanic(DB * dbp)94 __dbpanic(DB *dbp)
95 {
96 /* The only thing that can succeed is a close. */
97 dbp->del = (int (*)(const struct __db *, const DBT*, u_int))__dberr;
98 dbp->fd = (int (*)(const struct __db *))__dberr;
99 dbp->get = (int (*)(const struct __db *, const DBT*, DBT *, u_int))__dberr;
100 dbp->put = (int (*)(const struct __db *, DBT *, const DBT *, u_int))__dberr;
101 dbp->seq = (int (*)(const struct __db *, DBT *, DBT *, u_int))__dberr;
102 dbp->sync = (int (*)(const struct __db *, u_int))__dberr;
103 }
104