1 /* $OpenBSD: db.c,v 1.1 2005/08/03 22:33:59 espie 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. 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 #include <sys/types.h> 33 34 #include <errno.h> 35 #include <fcntl.h> 36 #include <stddef.h> 37 #include <stdio.h> 38 39 #include <db.h> 40 41 static int __dberr(void); 42 43 DB * 44 dbopen(const char *fname, int flags, int mode, DBTYPE type, 45 const void *openinfo) 46 { 47 48 #define DB_FLAGS (DB_LOCK | DB_SHMEM | DB_TXN) 49 #define USE_OPEN_FLAGS \ 50 (O_CREAT | O_EXCL | O_EXLOCK | O_NOFOLLOW | O_NONBLOCK | \ 51 O_RDONLY | O_RDWR | O_SHLOCK | O_SYNC | O_TRUNC) 52 53 if ((flags & ~(USE_OPEN_FLAGS | DB_FLAGS)) == 0) 54 switch (type) { 55 case DB_HASH: 56 return (__hash_open(fname, flags & USE_OPEN_FLAGS, 57 mode, openinfo, flags & DB_FLAGS)); 58 } 59 errno = EINVAL; 60 return (NULL); 61 } 62 63 static int 64 __dberr(void) 65 { 66 return (RET_ERROR); 67 } 68 69 /* 70 * __DBPANIC -- Stop. 71 * 72 * Parameters: 73 * dbp: pointer to the DB structure. 74 */ 75 void 76 __dbpanic(DB *dbp) 77 { 78 /* The only thing that can succeed is a close. */ 79 dbp->del = (int (*)(const struct __db *, const DBT*, u_int))__dberr; 80 dbp->fd = (int (*)(const struct __db *))__dberr; 81 dbp->get = (int (*)(const struct __db *, const DBT*, DBT *, u_int))__dberr; 82 dbp->put = (int (*)(const struct __db *, DBT *, const DBT *, u_int))__dberr; 83 dbp->seq = (int (*)(const struct __db *, DBT *, DBT *, u_int))__dberr; 84 dbp->sync = (int (*)(const struct __db *, u_int))__dberr; 85 } 86