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 * 3. 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 * @(#)db.c 8.4 (Berkeley) 2/21/94
30 * $FreeBSD: head/lib/libc/db/db/db.c 190497 2009-03-28 07:26:00Z delphij $
31 */
32
33 #include <sys/types.h>
34
35 #include <errno.h>
36 #include <fcntl.h>
37 #include <stddef.h>
38 #include <stdio.h>
39
40 #include <db.h>
41
42 static int __dberr(void);
43 static int __dberr_del(const struct __db *, const DBT *, unsigned int);
44 static int __dberr_fd(const struct __db *);
45 static int __dberr_get(const struct __db *, const DBT *, DBT *, unsigned int);
46 static int __dberr_put(const struct __db *, DBT *, const DBT *, unsigned int);
47 static int __dberr_seq(const struct __db *, DBT *, DBT *, unsigned int);
48 static int __dberr_sync(const struct __db *, unsigned int);
49
50 DB *
dbopen(const char * fname,int flags,mode_t mode,DBTYPE type,const void * openinfo)51 dbopen(const char *fname, int flags, mode_t mode, DBTYPE type, const void *openinfo)
52 {
53
54 #define DB_FLAGS (DB_LOCK | DB_SHMEM | DB_TXN)
55 #define USE_OPEN_FLAGS \
56 (O_CREAT | O_EXCL | O_EXLOCK | O_NOFOLLOW | O_NONBLOCK | \
57 O_RDONLY | O_RDWR | O_SHLOCK | O_SYNC | O_TRUNC | O_CLOEXEC)
58
59 if ((flags & ~(USE_OPEN_FLAGS | DB_FLAGS)) == 0)
60 switch (type) {
61 case DB_BTREE:
62 return (__bt_open(fname, flags & USE_OPEN_FLAGS,
63 mode, openinfo, flags & DB_FLAGS));
64 case DB_HASH:
65 return (__hash_open(fname, flags & USE_OPEN_FLAGS,
66 mode, openinfo, flags & DB_FLAGS));
67 case DB_RECNO:
68 return (__rec_open(fname, flags & USE_OPEN_FLAGS,
69 mode, openinfo, flags & DB_FLAGS));
70 }
71 errno = EINVAL;
72 return (NULL);
73 }
74
75 static int
__dberr(void)76 __dberr(void)
77 {
78 return (RET_ERROR);
79 }
80
81 static int
__dberr_del(const struct __db * dbp __unused,const DBT * key __unused,unsigned int flags __unused)82 __dberr_del(const struct __db *dbp __unused, const DBT *key __unused,
83 unsigned int flags __unused)
84 {
85 return (__dberr());
86 }
87
88 static int
__dberr_fd(const struct __db * dbp __unused)89 __dberr_fd(const struct __db *dbp __unused)
90 {
91 return (__dberr());
92 }
93
94 static int
__dberr_get(const struct __db * dbp __unused,const DBT * key __unused,DBT * data __unused,unsigned int flag __unused)95 __dberr_get(const struct __db *dbp __unused, const DBT *key __unused,
96 DBT *data __unused, unsigned int flag __unused)
97 {
98 return (__dberr());
99 }
100
101 static int
__dberr_put(const struct __db * dbp __unused,DBT * key __unused,const DBT * data __unused,unsigned int flag __unused)102 __dberr_put(const struct __db *dbp __unused, DBT *key __unused,
103 const DBT *data __unused, unsigned int flag __unused)
104 {
105 return (__dberr());
106 }
107
108 static int
__dberr_seq(const struct __db * dbp __unused,DBT * key __unused,DBT * data __unused,unsigned int flag __unused)109 __dberr_seq(const struct __db *dbp __unused, DBT *key __unused,
110 DBT *data __unused, unsigned int flag __unused)
111 {
112 return (__dberr());
113 }
114
115 static int
__dberr_sync(const struct __db * dbp __unused,unsigned int flags __unused)116 __dberr_sync(const struct __db *dbp __unused, unsigned int flags __unused)
117 {
118 return (__dberr());
119 }
120
121 /*
122 * __DBPANIC -- Stop.
123 *
124 * Parameters:
125 * dbp: pointer to the DB structure.
126 */
127 void
__dbpanic(DB * dbp)128 __dbpanic(DB *dbp)
129 {
130 /* The only thing that can succeed is a close. */
131 dbp->del = __dberr_del;
132 dbp->fd = __dberr_fd;
133 dbp->get = __dberr_get;
134 dbp->put = __dberr_put;
135 dbp->seq = __dberr_seq;
136 dbp->sync = __dberr_sync;
137 }
138