security/nss/lib/dbm/src/db.c@6474c204b198 (annotated)
security/nss/lib/dbm/src/db.c
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | /*- |
| michael@0 | 2 | * Copyright (c) 1991, 1993 |
| michael@0 | 3 | * The Regents of the University of California. All rights reserved. |
| michael@0 | 4 | * |
| michael@0 | 5 | * Redistribution and use in source and binary forms, with or without |
| michael@0 | 6 | * modification, are permitted provided that the following conditions |
| michael@0 | 7 | * are met: |
| michael@0 | 8 | * 1. Redistributions of source code must retain the above copyright |
| michael@0 | 9 | * notice, this list of conditions and the following disclaimer. |
| michael@0 | 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| michael@0 | 11 | * notice, this list of conditions and the following disclaimer in the |
| michael@0 | 12 | * documentation and/or other materials provided with the distribution. |
| michael@0 | 13 | * 3. ***REMOVED*** - see |
| michael@0 | 14 | * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change |
| michael@0 | 15 | * 4. Neither the name of the University nor the names of its contributors |
| michael@0 | 16 | * may be used to endorse or promote products derived from this software |
| michael@0 | 17 | * without specific prior written permission. |
| michael@0 | 18 | * |
| michael@0 | 19 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| michael@0 | 20 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| michael@0 | 21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| michael@0 | 22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| michael@0 | 23 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| michael@0 | 24 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| michael@0 | 25 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| michael@0 | 26 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| michael@0 | 27 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| michael@0 | 28 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| michael@0 | 29 | * SUCH DAMAGE. |
| michael@0 | 30 | */ |
| michael@0 | 31 | |
| michael@0 | 32 | #if defined(LIBC_SCCS) && !defined(lint) |
| michael@0 | 33 | static char sccsid[] = "@(#)db.c 8.4 (Berkeley) 2/21/94"; |
| michael@0 | 34 | #endif /* LIBC_SCCS and not lint */ |
| michael@0 | 35 | |
| michael@0 | 36 | #ifndef __DBINTERFACE_PRIVATE |
| michael@0 | 37 | #define __DBINTERFACE_PRIVATE |
| michael@0 | 38 | #endif |
| michael@0 | 39 | #ifdef macintosh |
| michael@0 | 40 | #include <unix.h> |
| michael@0 | 41 | #else |
| michael@0 | 42 | #include <sys/types.h> |
| michael@0 | 43 | #endif |
| michael@0 | 44 | |
| michael@0 | 45 | #include <errno.h> |
| michael@0 | 46 | #include <fcntl.h> |
| michael@0 | 47 | #include <stddef.h> |
| michael@0 | 48 | #include <stdio.h> |
| michael@0 | 49 | |
| michael@0 | 50 | #include "mcom_db.h" |
| michael@0 | 51 | |
| michael@0 | 52 | /* a global flag that locks closed all databases */ |
| michael@0 | 53 | int all_databases_locked_closed = 0; |
| michael@0 | 54 | |
| michael@0 | 55 | /* set or unset a global lock flag to disable the |
| michael@0 | 56 | * opening of any DBM file |
| michael@0 | 57 | */ |
| michael@0 | 58 | void |
| michael@0 | 59 | dbSetOrClearDBLock(DBLockFlagEnum type) |
| michael@0 | 60 | { |
| michael@0 | 61 | if(type == LockOutDatabase) |
| michael@0 | 62 | all_databases_locked_closed = 1; |
| michael@0 | 63 | else |
| michael@0 | 64 | all_databases_locked_closed = 0; |
| michael@0 | 65 | } |
| michael@0 | 66 | |
| michael@0 | 67 | DB * |
| michael@0 | 68 | dbopen(const char *fname, int flags,int mode, DBTYPE type, const void *openinfo) |
| michael@0 | 69 | { |
| michael@0 | 70 | |
| michael@0 | 71 | /* lock out all file databases. Let in-memory databases through |
| michael@0 | 72 | */ |
| michael@0 | 73 | if(all_databases_locked_closed && fname) |
| michael@0 | 74 | { |
| michael@0 | 75 | errno = EINVAL; |
| michael@0 | 76 | return(NULL); |
| michael@0 | 77 | } |
| michael@0 | 78 | |
| michael@0 | 79 | #define DB_FLAGS (DB_LOCK | DB_SHMEM | DB_TXN) |
| michael@0 | 80 | |
| michael@0 | 81 | |
| michael@0 | 82 | #if 0 /* most systems don't have EXLOCK and SHLOCK */ |
| michael@0 | 83 | #define USE_OPEN_FLAGS \ |
| michael@0 | 84 | (O_CREAT | O_EXCL | O_EXLOCK | O_NONBLOCK | O_RDONLY | \ |
| michael@0 | 85 | O_RDWR | O_SHLOCK | O_TRUNC) |
| michael@0 | 86 | #else |
| michael@0 | 87 | #define USE_OPEN_FLAGS \ |
| michael@0 | 88 | (O_CREAT | O_EXCL | O_RDONLY | \ |
| michael@0 | 89 | O_RDWR | O_TRUNC) |
| michael@0 | 90 | #endif |
| michael@0 | 91 | |
| michael@0 | 92 | if ((flags & ~(USE_OPEN_FLAGS | DB_FLAGS)) == 0) |
| michael@0 | 93 | switch (type) { |
| michael@0 | 94 | /* we don't need btree and recno right now */ |
| michael@0 | 95 | #if 0 |
| michael@0 | 96 | case DB_BTREE: |
| michael@0 | 97 | return (__bt_open(fname, flags & USE_OPEN_FLAGS, |
| michael@0 | 98 | mode, openinfo, flags & DB_FLAGS)); |
| michael@0 | 99 | case DB_RECNO: |
| michael@0 | 100 | return (__rec_open(fname, flags & USE_OPEN_FLAGS, |
| michael@0 | 101 | mode, openinfo, flags & DB_FLAGS)); |
| michael@0 | 102 | #endif |
| michael@0 | 103 | |
| michael@0 | 104 | case DB_HASH: |
| michael@0 | 105 | return (__hash_open(fname, flags & USE_OPEN_FLAGS, |
| michael@0 | 106 | mode, (const HASHINFO *)openinfo, flags & DB_FLAGS)); |
| michael@0 | 107 | default: |
| michael@0 | 108 | break; |
| michael@0 | 109 | } |
| michael@0 | 110 | errno = EINVAL; |
| michael@0 | 111 | return (NULL); |
| michael@0 | 112 | } |
| michael@0 | 113 | |
| michael@0 | 114 | static int |
| michael@0 | 115 | __dberr() |
| michael@0 | 116 | { |
| michael@0 | 117 | return (RET_ERROR); |
| michael@0 | 118 | } |
| michael@0 | 119 | |
| michael@0 | 120 | /* |
| michael@0 | 121 | * __DBPANIC -- Stop. |
| michael@0 | 122 | * |
| michael@0 | 123 | * Parameters: |
| michael@0 | 124 | * dbp: pointer to the DB structure. |
| michael@0 | 125 | */ |
| michael@0 | 126 | void |
| michael@0 | 127 | __dbpanic(DB *dbp) |
| michael@0 | 128 | { |
| michael@0 | 129 | /* The only thing that can succeed is a close. */ |
| michael@0 | 130 | dbp->del = (int (*)(const struct __db *, const DBT *, uint))__dberr; |
| michael@0 | 131 | dbp->fd = (int (*)(const struct __db *))__dberr; |
| michael@0 | 132 | dbp->get = (int (*)(const struct __db *, const DBT *, DBT *, uint))__dberr; |
| michael@0 | 133 | dbp->put = (int (*)(const struct __db *, DBT *, const DBT *, uint))__dberr; |
| michael@0 | 134 | dbp->seq = (int (*)(const struct __db *, DBT *, DBT *, uint))__dberr; |
| michael@0 | 135 | dbp->sync = (int (*)(const struct __db *, uint))__dberr; |
| michael@0 | 136 | } |
