зеркало из https://github.com/mozilla/pjs.git
147 строки
4.3 KiB
C
147 строки
4.3 KiB
C
/*-
|
|
* 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 "watcomfx.h"
|
|
|
|
#ifndef __DBINTERFACE_PRIVATE
|
|
#define __DBINTERFACE_PRIVATE
|
|
#endif
|
|
#ifdef macintosh
|
|
#include <unix.h>
|
|
#else
|
|
#include <sys/types.h>
|
|
#endif
|
|
|
|
#include <errno.h>
|
|
#ifndef macintosh
|
|
#include <fcntl.h>
|
|
#endif
|
|
#include <stddef.h>
|
|
#include <stdio.h>
|
|
|
|
#include "mcom_db.h"
|
|
|
|
/* a global flag that locks closed all databases */
|
|
int all_databases_locked_closed = 0;
|
|
|
|
/* set or unset a global lock flag to disable the
|
|
* opening of any DBM file
|
|
*/
|
|
void
|
|
dbSetOrClearDBLock(DBLockFlagEnum type)
|
|
{
|
|
if(type == LockOutDatabase)
|
|
all_databases_locked_closed = 1;
|
|
else
|
|
all_databases_locked_closed = 0;
|
|
}
|
|
|
|
#if defined(__WATCOMC__) || defined(__WATCOM_CPLUSPLUS__)
|
|
DB *
|
|
#else
|
|
PR_IMPLEMENT(DB *)
|
|
#endif
|
|
dbopen(const char *fname, int flags,int mode, DBTYPE type, const void *openinfo)
|
|
{
|
|
|
|
/* lock out all file databases. Let in-memory databases through
|
|
*/
|
|
if(all_databases_locked_closed && fname)
|
|
{
|
|
errno = EINVAL;
|
|
return(NULL);
|
|
}
|
|
|
|
#define DB_FLAGS (DB_LOCK | DB_SHMEM | DB_TXN)
|
|
|
|
|
|
#if 0 /* most systems dont have EXLOCK and SHLOCK */
|
|
#define USE_OPEN_FLAGS \
|
|
(O_CREAT | O_EXCL | O_EXLOCK | O_NONBLOCK | O_RDONLY | \
|
|
O_RDWR | O_SHLOCK | O_TRUNC)
|
|
#else
|
|
#define USE_OPEN_FLAGS \
|
|
(O_CREAT | O_EXCL | O_RDONLY | \
|
|
O_RDWR | O_TRUNC)
|
|
#endif
|
|
|
|
if ((flags & ~(USE_OPEN_FLAGS | DB_FLAGS)) == 0)
|
|
switch (type) {
|
|
/* we don't need btree and recno right now */
|
|
#if 0
|
|
case DB_BTREE:
|
|
return (__bt_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));
|
|
#endif
|
|
|
|
case DB_HASH:
|
|
return (__hash_open(fname, flags & USE_OPEN_FLAGS,
|
|
mode, (const HASHINFO *)openinfo, flags & DB_FLAGS));
|
|
default:
|
|
break;
|
|
}
|
|
errno = EINVAL;
|
|
return (NULL);
|
|
}
|
|
|
|
static int
|
|
__dberr()
|
|
{
|
|
return (RET_ERROR);
|
|
}
|
|
|
|
/*
|
|
* __DBPANIC -- Stop.
|
|
*
|
|
* Parameters:
|
|
* dbp: pointer to the DB structure.
|
|
*/
|
|
void
|
|
__dbpanic(DB *dbp)
|
|
{
|
|
/* The only thing that can succeed is a close. */
|
|
dbp->del = (int (*)(const struct __db *, const DBT *, uint))__dberr;
|
|
dbp->fd = (int (*)(const struct __db *))__dberr;
|
|
dbp->get = (int (*)(const struct __db *, const DBT *, DBT *, uint))__dberr;
|
|
dbp->put = (int (*)(const struct __db *, DBT *, const DBT *, uint))__dberr;
|
|
dbp->seq = (int (*)(const struct __db *, DBT *, DBT *, uint))__dberr;
|
|
dbp->sync = (int (*)(const struct __db *, uint))__dberr;
|
|
}
|