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 * $DragonFly: src/lib/libc/db/db/db.c,v 1.4 2005/09/19 09:02:02 asmodai Exp $ 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 DB * 43 dbopen(const char *fname, int flags, mode_t mode, DBTYPE type, const void *openinfo) 44 { 45 46 #define DB_FLAGS (DB_LOCK | DB_SHMEM | DB_TXN) 47 #define USE_OPEN_FLAGS \ 48 (O_CREAT | O_EXCL | O_EXLOCK | O_NONBLOCK | O_RDONLY | \ 49 O_RDWR | O_SHLOCK | O_TRUNC) 50 51 if ((flags & ~(USE_OPEN_FLAGS | DB_FLAGS)) == 0) 52 switch (type) { 53 case DB_BTREE: 54 return (__bt_open(fname, flags & USE_OPEN_FLAGS, 55 mode, openinfo, (int)flags & DB_FLAGS)); 56 case DB_HASH: 57 return (__hash_open(fname, flags & USE_OPEN_FLAGS, 58 mode, openinfo, (int)flags & DB_FLAGS)); 59 case DB_RECNO: 60 return (__rec_open(fname, flags & USE_OPEN_FLAGS, 61 mode, openinfo, (int)flags & DB_FLAGS)); 62 } 63 errno = EINVAL; 64 return (NULL); 65 } 66 67 static int 68 __dberr(void) 69 { 70 return (RET_ERROR); 71 } 72 73 /* 74 * __DBPANIC -- Stop. 75 * 76 * Parameters: 77 * dbp: pointer to the DB structure. 78 */ 79 void 80 __dbpanic(DB *dbp) 81 { 82 /* The only thing that can succeed is a close. */ 83 dbp->del = (int (*)(const DB *, const DBT *, u_int))__dberr; 84 dbp->fd = (int (*)(const DB *))__dberr; 85 dbp->get = (int (*)(const DB *, const DBT *, DBT *, u_int))__dberr; 86 dbp->put = (int (*)(const DB *, DBT *, const DBT *, u_int))__dberr; 87 dbp->seq = (int (*)(const DB *, DBT *, DBT *, u_int))__dberr; 88 dbp->sync = (int (*)(const DB *, u_int))__dberr; 89 } 90