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/* $OpenBSD: db.c,v 1.13 2015/09/05 11:28:35 guenther Exp $ */ |
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/*- |
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* Copyright (c) 1991, 1993 |
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* The Regents of the University of California. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. Neither the name of the University nor the names of its contributors |
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* may be used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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*/ |
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#include <sys/types.h> |
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#include <errno.h> |
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#include <fcntl.h> |
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#include <stddef.h> |
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#include <stdio.h> |
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#include <db.h> |
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static int __dberr(void); |
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DB * |
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dbopen(const char *fname, int flags, int mode, DBTYPE type, |
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const void *openinfo) |
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{ |
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#define DB_FLAGS (DB_LOCK | DB_SHMEM | DB_TXN) |
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#define USE_OPEN_FLAGS \ |
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(O_CREAT | O_EXCL | O_EXLOCK | O_NOFOLLOW | O_NONBLOCK | \ |
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O_ACCMODE | O_SHLOCK | O_SYNC | O_TRUNC) |
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if (((flags & O_ACCMODE) == O_RDONLY || (flags & O_ACCMODE) == O_RDWR) |
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&& (flags & ~(USE_OPEN_FLAGS | DB_FLAGS)) == 0) |
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switch (type) { |
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case DB_BTREE: |
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return (__bt_open(fname, flags & USE_OPEN_FLAGS, |
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mode, openinfo, flags & DB_FLAGS)); |
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case DB_HASH: |
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return (__hash_open(fname, flags & USE_OPEN_FLAGS, |
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mode, openinfo, flags & DB_FLAGS)); |
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case DB_RECNO: |
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return (__rec_open(fname, flags & USE_OPEN_FLAGS, |
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mode, openinfo, flags & DB_FLAGS)); |
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} |
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errno = EINVAL; |
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return (NULL); |
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} |
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DEF_WEAK(dbopen); |
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static int |
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__dberr(void) |
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{ |
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return (RET_ERROR); |
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} |
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/* |
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* __DBPANIC -- Stop. |
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* |
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* Parameters: |
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* dbp: pointer to the DB structure. |
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*/ |
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void |
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__dbpanic(DB *dbp) |
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{ |
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/* The only thing that can succeed is a close. */ |
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dbp->del = (int (*)(const struct __db *, const DBT*, u_int))__dberr; |
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dbp->fd = (int (*)(const struct __db *))__dberr; |
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dbp->get = (int (*)(const struct __db *, const DBT*, DBT *, u_int))__dberr; |
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dbp->put = (int (*)(const struct __db *, DBT *, const DBT *, u_int))__dberr; |
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dbp->seq = (int (*)(const struct __db *, DBT *, DBT *, u_int))__dberr; |
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dbp->sync = (int (*)(const struct __db *, u_int))__dberr; |
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} |