1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/security/nss/lib/dbm/src/db.c Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,136 @@
1.4 +/*-
1.5 + * Copyright (c) 1991, 1993
1.6 + * The Regents of the University of California. All rights reserved.
1.7 + *
1.8 + * Redistribution and use in source and binary forms, with or without
1.9 + * modification, are permitted provided that the following conditions
1.10 + * are met:
1.11 + * 1. Redistributions of source code must retain the above copyright
1.12 + * notice, this list of conditions and the following disclaimer.
1.13 + * 2. Redistributions in binary form must reproduce the above copyright
1.14 + * notice, this list of conditions and the following disclaimer in the
1.15 + * documentation and/or other materials provided with the distribution.
1.16 + * 3. ***REMOVED*** - see
1.17 + * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change
1.18 + * 4. Neither the name of the University nor the names of its contributors
1.19 + * may be used to endorse or promote products derived from this software
1.20 + * without specific prior written permission.
1.21 + *
1.22 + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
1.23 + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
1.24 + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
1.25 + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
1.26 + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
1.27 + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
1.28 + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
1.29 + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
1.30 + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
1.31 + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
1.32 + * SUCH DAMAGE.
1.33 + */
1.34 +
1.35 +#if defined(LIBC_SCCS) && !defined(lint)
1.36 +static char sccsid[] = "@(#)db.c 8.4 (Berkeley) 2/21/94";
1.37 +#endif /* LIBC_SCCS and not lint */
1.38 +
1.39 +#ifndef __DBINTERFACE_PRIVATE
1.40 +#define __DBINTERFACE_PRIVATE
1.41 +#endif
1.42 +#ifdef macintosh
1.43 +#include <unix.h>
1.44 +#else
1.45 +#include <sys/types.h>
1.46 +#endif
1.47 +
1.48 +#include <errno.h>
1.49 +#include <fcntl.h>
1.50 +#include <stddef.h>
1.51 +#include <stdio.h>
1.52 +
1.53 +#include "mcom_db.h"
1.54 +
1.55 +/* a global flag that locks closed all databases */
1.56 +int all_databases_locked_closed = 0;
1.57 +
1.58 +/* set or unset a global lock flag to disable the
1.59 + * opening of any DBM file
1.60 + */
1.61 +void
1.62 +dbSetOrClearDBLock(DBLockFlagEnum type)
1.63 +{
1.64 + if(type == LockOutDatabase)
1.65 + all_databases_locked_closed = 1;
1.66 + else
1.67 + all_databases_locked_closed = 0;
1.68 +}
1.69 +
1.70 +DB *
1.71 +dbopen(const char *fname, int flags,int mode, DBTYPE type, const void *openinfo)
1.72 +{
1.73 +
1.74 + /* lock out all file databases. Let in-memory databases through
1.75 + */
1.76 + if(all_databases_locked_closed && fname)
1.77 + {
1.78 + errno = EINVAL;
1.79 + return(NULL);
1.80 + }
1.81 +
1.82 +#define DB_FLAGS (DB_LOCK | DB_SHMEM | DB_TXN)
1.83 +
1.84 +
1.85 +#if 0 /* most systems don't have EXLOCK and SHLOCK */
1.86 +#define USE_OPEN_FLAGS \
1.87 + (O_CREAT | O_EXCL | O_EXLOCK | O_NONBLOCK | O_RDONLY | \
1.88 + O_RDWR | O_SHLOCK | O_TRUNC)
1.89 +#else
1.90 +#define USE_OPEN_FLAGS \
1.91 + (O_CREAT | O_EXCL | O_RDONLY | \
1.92 + O_RDWR | O_TRUNC)
1.93 +#endif
1.94 +
1.95 + if ((flags & ~(USE_OPEN_FLAGS | DB_FLAGS)) == 0)
1.96 + switch (type) {
1.97 +/* we don't need btree and recno right now */
1.98 +#if 0
1.99 + case DB_BTREE:
1.100 + return (__bt_open(fname, flags & USE_OPEN_FLAGS,
1.101 + mode, openinfo, flags & DB_FLAGS));
1.102 + case DB_RECNO:
1.103 + return (__rec_open(fname, flags & USE_OPEN_FLAGS,
1.104 + mode, openinfo, flags & DB_FLAGS));
1.105 +#endif
1.106 +
1.107 + case DB_HASH:
1.108 + return (__hash_open(fname, flags & USE_OPEN_FLAGS,
1.109 + mode, (const HASHINFO *)openinfo, flags & DB_FLAGS));
1.110 + default:
1.111 + break;
1.112 + }
1.113 + errno = EINVAL;
1.114 + return (NULL);
1.115 +}
1.116 +
1.117 +static int
1.118 +__dberr()
1.119 +{
1.120 + return (RET_ERROR);
1.121 +}
1.122 +
1.123 +/*
1.124 + * __DBPANIC -- Stop.
1.125 + *
1.126 + * Parameters:
1.127 + * dbp: pointer to the DB structure.
1.128 + */
1.129 +void
1.130 +__dbpanic(DB *dbp)
1.131 +{
1.132 + /* The only thing that can succeed is a close. */
1.133 + dbp->del = (int (*)(const struct __db *, const DBT *, uint))__dberr;
1.134 + dbp->fd = (int (*)(const struct __db *))__dberr;
1.135 + dbp->get = (int (*)(const struct __db *, const DBT *, DBT *, uint))__dberr;
1.136 + dbp->put = (int (*)(const struct __db *, DBT *, const DBT *, uint))__dberr;
1.137 + dbp->seq = (int (*)(const struct __db *, DBT *, DBT *, uint))__dberr;
1.138 + dbp->sync = (int (*)(const struct __db *, uint))__dberr;
1.139 +}
