Mercurial > trustbridge > nss-cmake-static
comparison nss/lib/dbm/src/db.c @ 3:150b72113545
Add DBM and legacydb support
| author | Andre Heinecke <andre.heinecke@intevation.de> |
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| date | Tue, 05 Aug 2014 18:32:02 +0200 |
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| 2:a945361df361 | 3:150b72113545 |
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| 1 /*- | |
| 2 * Copyright (c) 1991, 1993 | |
| 3 * The Regents of the University of California. All rights reserved. | |
| 4 * | |
| 5 * Redistribution and use in source and binary forms, with or without | |
| 6 * modification, are permitted provided that the following conditions | |
| 7 * are met: | |
| 8 * 1. Redistributions of source code must retain the above copyright | |
| 9 * notice, this list of conditions and the following disclaimer. | |
| 10 * 2. Redistributions in binary form must reproduce the above copyright | |
| 11 * notice, this list of conditions and the following disclaimer in the | |
| 12 * documentation and/or other materials provided with the distribution. | |
| 13 * 3. ***REMOVED*** - see | |
| 14 * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change | |
| 15 * 4. Neither the name of the University nor the names of its contributors | |
| 16 * may be used to endorse or promote products derived from this software | |
| 17 * without specific prior written permission. | |
| 18 * | |
| 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
| 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 29 * SUCH DAMAGE. | |
| 30 */ | |
| 31 | |
| 32 #if defined(LIBC_SCCS) && !defined(lint) | |
| 33 static char sccsid[] = "@(#)db.c 8.4 (Berkeley) 2/21/94"; | |
| 34 #endif /* LIBC_SCCS and not lint */ | |
| 35 | |
| 36 #ifndef __DBINTERFACE_PRIVATE | |
| 37 #define __DBINTERFACE_PRIVATE | |
| 38 #endif | |
| 39 #ifdef macintosh | |
| 40 #include <unix.h> | |
| 41 #else | |
| 42 #include <sys/types.h> | |
| 43 #endif | |
| 44 | |
| 45 #include <errno.h> | |
| 46 #include <fcntl.h> | |
| 47 #include <stddef.h> | |
| 48 #include <stdio.h> | |
| 49 | |
| 50 #include "mcom_db.h" | |
| 51 | |
| 52 /* a global flag that locks closed all databases */ | |
| 53 int all_databases_locked_closed = 0; | |
| 54 | |
| 55 /* set or unset a global lock flag to disable the | |
| 56 * opening of any DBM file | |
| 57 */ | |
| 58 void | |
| 59 dbSetOrClearDBLock(DBLockFlagEnum type) | |
| 60 { | |
| 61 if(type == LockOutDatabase) | |
| 62 all_databases_locked_closed = 1; | |
| 63 else | |
| 64 all_databases_locked_closed = 0; | |
| 65 } | |
| 66 | |
| 67 DB * | |
| 68 dbopen(const char *fname, int flags,int mode, DBTYPE type, const void *openinfo) | |
| 69 { | |
| 70 | |
| 71 /* lock out all file databases. Let in-memory databases through | |
| 72 */ | |
| 73 if(all_databases_locked_closed && fname) | |
| 74 { | |
| 75 errno = EINVAL; | |
| 76 return(NULL); | |
| 77 } | |
| 78 | |
| 79 #define DB_FLAGS (DB_LOCK | DB_SHMEM | DB_TXN) | |
| 80 | |
| 81 | |
| 82 #if 0 /* most systems don't have EXLOCK and SHLOCK */ | |
| 83 #define USE_OPEN_FLAGS \ | |
| 84 (O_CREAT | O_EXCL | O_EXLOCK | O_NONBLOCK | O_RDONLY | \ | |
| 85 O_RDWR | O_SHLOCK | O_TRUNC) | |
| 86 #else | |
| 87 #define USE_OPEN_FLAGS \ | |
| 88 (O_CREAT | O_EXCL | O_RDONLY | \ | |
| 89 O_RDWR | O_TRUNC) | |
| 90 #endif | |
| 91 | |
| 92 if ((flags & ~(USE_OPEN_FLAGS | DB_FLAGS)) == 0) | |
| 93 switch (type) { | |
| 94 /* we don't need btree and recno right now */ | |
| 95 #if 0 | |
| 96 case DB_BTREE: | |
| 97 return (__bt_open(fname, flags & USE_OPEN_FLAGS, | |
| 98 mode, openinfo, flags & DB_FLAGS)); | |
| 99 case DB_RECNO: | |
| 100 return (__rec_open(fname, flags & USE_OPEN_FLAGS, | |
| 101 mode, openinfo, flags & DB_FLAGS)); | |
| 102 #endif | |
| 103 | |
| 104 case DB_HASH: | |
| 105 return (__hash_open(fname, flags & USE_OPEN_FLAGS, | |
| 106 mode, (const HASHINFO *)openinfo, flags & DB_FLAGS)); | |
| 107 default: | |
| 108 break; | |
| 109 } | |
| 110 errno = EINVAL; | |
| 111 return (NULL); | |
| 112 } | |
| 113 | |
| 114 static int | |
| 115 __dberr() | |
| 116 { | |
| 117 return (RET_ERROR); | |
| 118 } | |
| 119 | |
| 120 /* | |
| 121 * __DBPANIC -- Stop. | |
| 122 * | |
| 123 * Parameters: | |
| 124 * dbp: pointer to the DB structure. | |
| 125 */ | |
| 126 void | |
| 127 __dbpanic(DB *dbp) | |
| 128 { | |
| 129 /* The only thing that can succeed is a close. */ | |
| 130 dbp->del = (int (*)(const struct __db *, const DBT *, uint))__dberr; | |
| 131 dbp->fd = (int (*)(const struct __db *))__dberr; | |
| 132 dbp->get = (int (*)(const struct __db *, const DBT *, DBT *, uint))__dberr; | |
| 133 dbp->put = (int (*)(const struct __db *, DBT *, const DBT *, uint))__dberr; | |
| 134 dbp->seq = (int (*)(const struct __db *, DBT *, DBT *, uint))__dberr; | |
| 135 dbp->sync = (int (*)(const struct __db *, uint))__dberr; | |
| 136 } |