Mercurial > trustbridge > nss-cmake-static

annotate nss/lib/dbm/src/db.c @ 4:b513267f632f tip

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Build DBM module
author Andre Heinecke <andre.heinecke@intevation.de>
date Tue, 05 Aug 2014 18:58:03 +0200
parents 150b72113545
children
rev   line source
3
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1 /*-
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2 * Copyright (c) 1991, 1993
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3 * The Regents of the University of California. All rights reserved.
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4 *
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5 * Redistribution and use in source and binary forms, with or without
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6 * modification, are permitted provided that the following conditions
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7 * are met:
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8 * 1. Redistributions of source code must retain the above copyright
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9 * notice, this list of conditions and the following disclaimer.
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10 * 2. Redistributions in binary form must reproduce the above copyright
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11 * notice, this list of conditions and the following disclaimer in the
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12 * documentation and/or other materials provided with the distribution.
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13 * 3. ***REMOVED*** - see
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14 * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change
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15 * 4. Neither the name of the University nor the names of its contributors
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16 * may be used to endorse or promote products derived from this software
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17 * without specific prior written permission.
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18 *
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19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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29 * SUCH DAMAGE.
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30 */
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31
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32 #if defined(LIBC_SCCS) && !defined(lint)
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33 static char sccsid[] = "@(#)db.c 8.4 (Berkeley) 2/21/94";
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34 #endif /* LIBC_SCCS and not lint */
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35
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36 #ifndef __DBINTERFACE_PRIVATE
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37 #define __DBINTERFACE_PRIVATE
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38 #endif
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39 #ifdef macintosh
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40 #include <unix.h>
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41 #else
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42 #include <sys/types.h>
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43 #endif
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44
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45 #include <errno.h>
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46 #include <fcntl.h>
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47 #include <stddef.h>
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48 #include <stdio.h>
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49
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50 #include "mcom_db.h"
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51
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52 /* a global flag that locks closed all databases */
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53 int all_databases_locked_closed = 0;
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54
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55 /* set or unset a global lock flag to disable the
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56 * opening of any DBM file
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57 */
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58 void
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59 dbSetOrClearDBLock(DBLockFlagEnum type)
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60 {
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61 if(type == LockOutDatabase)
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62 all_databases_locked_closed = 1;
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63 else
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64 all_databases_locked_closed = 0;
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65 }
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66
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67 DB *
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68 dbopen(const char *fname, int flags,int mode, DBTYPE type, const void *openinfo)
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69 {
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70
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71 /* lock out all file databases. Let in-memory databases through
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72 */
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73 if(all_databases_locked_closed && fname)
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74 {
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75 errno = EINVAL;
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76 return(NULL);
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77 }
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78
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79 #define DB_FLAGS (DB_LOCK | DB_SHMEM | DB_TXN)
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80
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81
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82 #if 0 /* most systems don't have EXLOCK and SHLOCK */
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83 #define USE_OPEN_FLAGS \
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84 (O_CREAT | O_EXCL | O_EXLOCK | O_NONBLOCK | O_RDONLY | \
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85 O_RDWR | O_SHLOCK | O_TRUNC)
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86 #else
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87 #define USE_OPEN_FLAGS \
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88 (O_CREAT | O_EXCL | O_RDONLY | \
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89 O_RDWR | O_TRUNC)
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90 #endif
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91
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92 if ((flags & ~(USE_OPEN_FLAGS | DB_FLAGS)) == 0)
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93 switch (type) {
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94 /* we don't need btree and recno right now */
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95 #if 0
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96 case DB_BTREE:
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97 return (__bt_open(fname, flags & USE_OPEN_FLAGS,
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98 mode, openinfo, flags & DB_FLAGS));
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99 case DB_RECNO:
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100 return (__rec_open(fname, flags & USE_OPEN_FLAGS,
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101 mode, openinfo, flags & DB_FLAGS));
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102 #endif
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103
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104 case DB_HASH:
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105 return (__hash_open(fname, flags & USE_OPEN_FLAGS,
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106 mode, (const HASHINFO *)openinfo, flags & DB_FLAGS));
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107 default:
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108 break;
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109 }
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110 errno = EINVAL;
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111 return (NULL);
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112 }
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113
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114 static int
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115 __dberr()
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116 {
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117 return (RET_ERROR);
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118 }
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119
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120 /*
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121 * __DBPANIC -- Stop.
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122 *
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123 * Parameters:
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124 * dbp: pointer to the DB structure.
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125 */
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126 void
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127 __dbpanic(DB *dbp)
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128 {
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129 /* The only thing that can succeed is a close. */
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130 dbp->del = (int (*)(const struct __db *, const DBT *, uint))__dberr;
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131 dbp->fd = (int (*)(const struct __db *))__dberr;
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132 dbp->get = (int (*)(const struct __db *, const DBT *, DBT *, uint))__dberr;
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133 dbp->put = (int (*)(const struct __db *, DBT *, const DBT *, uint))__dberr;
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134 dbp->seq = (int (*)(const struct __db *, DBT *, DBT *, uint))__dberr;
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135 dbp->sync = (int (*)(const struct __db *, uint))__dberr;
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136 }
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