utils/db1-ast/db/db.c

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/*-
 * Copyright (c) 1991, 1993
 * The Regents of the University of California. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 * must display the following acknowledgement:
 * This product includes software developed by the University of
 * California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 * may be used to endorse or promote products derived from this software
 * without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)db.c 8.4 (Berkeley) 2/21/94";
#endif /* LIBC_SCCS and not lint */

#include <sys/types.h>

#include <errno.h>
#include <fcntl.h>
#include <stddef.h>
#include <stdio.h>

#include "../include/db.h"

DB *
dbopen(fname, flags, mode, type, openinfo)
 const char *fname;
 int flags, mode;
 DBTYPE type;
 const void *openinfo;
{

#define DB_FLAGS (DB_LOCK | DB_SHMEM | DB_TXN)
#define USE_OPEN_FLAGS \
 (O_CREAT | O_EXCL | O_EXLOCK | O_NONBLOCK | O_RDONLY | \
 O_RDWR | O_SHLOCK | O_TRUNC)

 if ((flags & ~(USE_OPEN_FLAGS | DB_FLAGS)) == 0)
 switch (type) {
 case DB_BTREE:
 return (__bt_open(fname, flags & USE_OPEN_FLAGS,
 mode, openinfo, flags & DB_FLAGS));
 case DB_HASH:
 return (__hash_open(fname, flags & USE_OPEN_FLAGS,
 mode, openinfo, flags & DB_FLAGS));
 case DB_RECNO:
 return (__rec_open(fname, flags & USE_OPEN_FLAGS,
 mode, openinfo, flags & DB_FLAGS));
 }
 errno = EINVAL;
 return (NULL);
}

static int
__dberr __P((void))
{
 return (RET_ERROR);
}

/*
 * __DBPANIC -- Stop.
 *
 * Parameters:
 * dbp: pointer to the DB structure.
 */
void
__dbpanic(dbp)
 DB *dbp;
{
 /* The only thing that can succeed is a close. */
 dbp->del = (int (*)__P((const struct __db *,
 const DBT *, u_int))) __dberr;
 dbp->get = (int (*)__P((const struct __db *,
 const DBT *, DBT *, u_int))) __dberr;
 dbp->put = (int (*)__P((const struct __db *,
 DBT *, const DBT *, u_int))) __dberr;
 dbp->seq = (int (*)__P((const struct __db *,
 DBT *, DBT *, u_int))) __dberr;
 dbp->sync = (int (*)__P((const struct __db *, u_int))) __dberr;
 dbp->fd = (int (*)__P((const struct __db *))) __dberr;
}