1 /* $NetBSD: db.c,v 1.12 2000/01/22 22:19:07 mycroft Exp $ */ 2 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #if defined(LIBC_SCCS) && !defined(lint) 38 #if 0 39 static char sccsid[] = "@(#)db.c 8.4 (Berkeley) 2/21/94"; 40 #else 41 __RCSID("$NetBSD: db.c,v 1.12 2000/01/22 22:19:07 mycroft Exp $"); 42 #endif 43 #endif /* LIBC_SCCS and not lint */ 44 45 #include "namespace.h" 46 #include <sys/types.h> 47 48 #include <errno.h> 49 #include <fcntl.h> 50 #include <stddef.h> 51 #include <stdio.h> 52 53 #include <db.h> 54 static int __dberr __P((void)); 55 56 #ifdef __weak_alias 57 __weak_alias(dbopen,_dbopen) 58 #endif 59 60 DB * 61 dbopen(fname, flags, mode, type, openinfo) 62 const char *fname; 63 int flags; 64 mode_t mode; 65 DBTYPE type; 66 const void *openinfo; 67 { 68 69 #define DB_FLAGS (DB_LOCK | DB_SHMEM | DB_TXN) 70 #define USE_OPEN_FLAGS \ 71 (O_CREAT | O_EXCL | O_EXLOCK | O_NONBLOCK | O_RDONLY | \ 72 O_RDWR | O_SHLOCK | O_TRUNC) 73 74 if ((flags & ~(USE_OPEN_FLAGS | DB_FLAGS)) == 0) 75 switch (type) { 76 case DB_BTREE: 77 return (__bt_open(fname, flags & USE_OPEN_FLAGS, 78 mode, openinfo, (int)(flags & DB_FLAGS))); 79 case DB_HASH: 80 return (__hash_open(fname, flags & USE_OPEN_FLAGS, 81 mode, openinfo, (int)(flags & DB_FLAGS))); 82 case DB_RECNO: 83 return (__rec_open(fname, flags & USE_OPEN_FLAGS, 84 mode, openinfo, (int)(flags & DB_FLAGS))); 85 } 86 errno = EINVAL; 87 return (NULL); 88 } 89 90 static int 91 __dberr() 92 { 93 return (RET_ERROR); 94 } 95 96 /* 97 * __DBPANIC -- Stop. 98 * 99 * Parameters: 100 * dbp: pointer to the DB structure. 101 */ 102 void 103 __dbpanic(dbp) 104 DB *dbp; 105 { 106 /* The only thing that can succeed is a close. */ 107 dbp->del = (int (*)(const struct __db *, const DBT*, u_int))__dberr; 108 dbp->fd = (int (*)(const struct __db *))__dberr; 109 dbp->get = (int (*)(const struct __db *, const DBT*, DBT *, u_int))__dberr; 110 dbp->put = (int (*)(const struct __db *, DBT *, const DBT *, u_int))__dberr; 111 dbp->seq = (int (*)(const struct __db *, DBT *, DBT *, u_int))__dberr; 112 dbp->sync = (int (*)(const struct __db *, u_int))__dberr; 113 } 114