path: root/db2/db/db.c

/*-
 * See the file LICENSE for redistribution information.
 *
 * Copyright (c) 1996, 1997, 1998
 *	Sleepycat Software.  All rights reserved.
 */
/*
 * Copyright (c) 1990, 1993, 1994, 1995, 1996
 *	Keith Bostic.  All rights reserved.
 */
/*
 * Copyright (c) 1990, 1993, 1994, 1995
 *	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.
 */

#include "config.h"

#ifndef lint
static const char sccsid[] = "@(#)db.c	10.75 (Sleepycat) 12/3/98";
#endif /* not lint */

#ifndef NO_SYSTEM_INCLUDES
#include <sys/types.h>

#include <errno.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#endif

#include "db_int.h"
#include "shqueue.h"
#include "db_page.h"
#include "db_shash.h"
#include "db_swap.h"
#include "btree.h"
#include "hash.h"
#include "mp.h"
#include "db_am.h"
#include "common_ext.h"

/*
 * If the metadata page has the flag set, set the local flag.  If the page
 * does NOT have the flag set, return EINVAL if the user's dbinfo argument
 * caused us to already set the local flag.
 */
#define	DBINFO_FCHK(dbp, fn, meta_flags, m_name, dbp_name) {		\
	if ((meta_flags) & (m_name))					\
		F_SET(dbp, dbp_name);					\
	else								\
		if (F_ISSET(dbp, dbp_name)) {				\
			__db_err(dbenv,					\
	    "%s: %s specified in dbinfo argument but not set in file",	\
			    fname, fn);					\
			goto einval;					\
		}							\
}

#ifdef _LIBC
#define db_open(fname, type, flags, mode, dbenv, dbinfo, dbpp) \
  __nss_db_open(fname, type, flags, mode, dbenv, dbinfo, dbpp)
#endif

/*
 * db_open --
 *	Main library interface to the DB access methods.
 */
int
db_open(fname, type, flags, mode, dbenv, dbinfo, dbpp)
	const char *fname;
	DBTYPE type;
	u_int32_t flags;
	int mode;
	DB_ENV *dbenv;
	DB_INFO *dbinfo;
	DB **dbpp;
{
	BTMETA *btm;
	DB *dbp;
	DBT pgcookie;
	DB_ENV *envp, t_dbenv;
	DB_MPOOL_FINFO finfo;
	DB_PGINFO pginfo;
	HASHHDR *hashm;
	size_t cachesize;
	ssize_t nr;
	u_int32_t iopsize;
	int fd, ftype, need_fileid, restore, ret, retry_cnt, swapped;
	char *