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 * 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 76 __dberr(void) 77 { 78 return (RET_ERROR); 79 } 80 81 static int 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 89 __dberr_fd(const struct __db *dbp __unused) 90 { 91 return (__dberr()); 92 } 93 94 static int 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 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 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 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 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