1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
|
/*
* Copyright (c) 1999-2001 Sendmail, Inc. and its suppliers.
* All rights reserved.
*
* By using this file, you agree to the terms and conditions set
* forth in the LICENSE file which can be found at the top level of
* the sendmail distribution.
*
* $Sendmail: smdb.h,v 8.37 2001/09/11 03:08:28 gshapiro Exp $
*
*/
#ifndef _SMDB_H_
# define _SMDB_H_
# include <sys/types.h>
# include <sys/stat.h>
# include <sm/gen.h>
# include <sm/errstring.h>
# ifndef NDBM
# ifndef NEWDB
ERROR NDBM or NEWDB must be defined.
# endif /* ! NEWDB */
# endif /* ! NDBM */
# ifdef NDBM
# include <ndbm.h>
# endif /* NDBM */
# ifdef NEWDB
# include <db.h>
# ifndef DB_VERSION_MAJOR
# define DB_VERSION_MAJOR 1
# endif /* ! DB_VERSION_MAJOR */
# endif /* NEWDB */
/*
** Some size constants
*/
#define SMDB_MAX_USER_NAME_LEN 1024
#define SMDB_MAX_NAME_LEN 1024
/*
** This file defines the abstraction for database lookups. It is pretty
** much a copy of the db2 interface with the exception that every function
** returns 0 on success and non-zero on failure. The non-zero return code
** is meaningful.
**
** I'm going to put the function comments in this file since the interface
** MUST be the same for all inheritors of this interface.
*/
typedef struct database_struct SMDB_DATABASE;
typedef struct cursor_struct SMDB_CURSOR;
typedef struct entry_struct SMDB_DBENT;
/*
** DB_CLOSE_FUNC -- close the database
**
** Parameters:
** db -- The database to close.
**
** Returns:
** 0 - Success, otherwise errno.
**
*/
typedef int (*db_close_func) __P((SMDB_DATABASE *db));
/*
** DB_DEL_FUNC -- removes a key and data pair from the database
**
** Parameters:
** db -- The database to close.
** key -- The key to remove.
** flags -- delete options. There are currently no defined
** flags for delete.
**
** Returns:
** 0 - Success, otherwise errno.
**
*/
typedef int (*db_del_func) __P((SMDB_DATABASE *db,
SMDB_DBENT *key, unsigned int flags));
/*
** DB_FD_FUNC -- Returns a pointer to a file used for the database.
**
** Parameters:
** db -- The database to close.
** fd -- A pointer to store the returned fd in.
**
** Returns:
** 0 - Success, otherwise errno.
**
*/
typedef int (*db_fd_func) __P((SMDB_DATABASE *db, int* fd));
/*
** DB_GET_FUNC -- Gets the data associated with a key.
**
** Parameters:
** db -- The database to close.
** key -- The key to access.
** data -- A place to store the returned data.
** flags -- get options. There are currently no defined
** flags for get.
**
** Returns:
** 0 - Success, otherwise errno.
**
*/
typedef int (*db_get_func) __P((SMDB_DATABASE *db,
SMDB_DBENT *key,
SMDB_DBENT *data, unsigned int flags));
/*
** DB_PUT_FUNC -- Sets some data according to the key.
**
** Parameters:
** db -- The database to close.
** key -- The key to use.
** data -- The data to store.
** flags -- put options:
** SMDBF_NO_OVERWRITE - Return an error if key alread
** exists.
** SMDBF_ALLOW_DUP - Allow duplicates in btree maps.
**
** Returns:
** 0 - Success, otherwise errno.
**
*/
typedef int (*db_put_func) __P((SMDB_DATABASE *db,
SMDB_DBENT *key,
SMDB_DBENT *data, unsigned int flags));
/*
** DB_SYNC_FUNC -- Flush any cached information to disk.
**
** Parameters:
** db -- The database to sync.
** flags -- sync options:
**
** Returns:
** 0 - Success, otherwise errno.
**
*/
typedef int (*db_sync_func) __P((SMDB_DATABASE *db, unsigned int flags));
/*
** DB_SET_OWNER_FUNC -- Set the owner and group of the database files.
**
** Parameters:
** db -- The database to set.
** uid -- The UID for the new owner (-1 for no change)
** gid -- The GID for the new owner (-1 for no change)
**
** Returns:
** 0 - Success, otherwise errno.
**
*/
typedef int (*db_set_owner_func) __P((SMDB_DATABASE *db, uid_t uid, gid_t gid));
/*
** DB_CURSOR -- Obtain a cursor for sequential access
**
** Parameters:
** db -- The database to use.
** cursor -- The address of a cursor pointer.
** flags -- sync options:
**
** Returns:
** 0 - Success, otherwise errno.
**
*/
typedef int (*db_cursor_func) __P((SMDB_DATABASE *db,
SMDB_CURSOR **cursor, unsigned int flags));
typedef int (*db_lockfd_func) __P((SMDB_DATABASE *db));
struct database_struct
{
db_close_func smdb_close;
db_del_func smdb_del;
db_fd_func smdb_fd;
db_get_func smdb_get;
db_put_func smdb_put;
db_sync_func smdb_sync;
db_set_owner_func smdb_set_owner;
db_cursor_func smdb_cursor;
db_lockfd_func smdb_lockfd;
void *smdb_impl;
};
/*
** DB_CURSOR_CLOSE -- Close a cursor
**
** Parameters:
** cursor -- The cursor to close.
**
** Returns:
** 0 - Success, otherwise errno.
**
*/
typedef int (*db_cursor_close_func) __P((SMDB_CURSOR *cursor));
/*
** DB_CURSOR_DEL -- Delete the key/value pair of this cursor
**
** Parameters:
** cursor -- The cursor.
** flags -- flags
**
** Returns:
** 0 - Success, otherwise errno.
**
*/
typedef int (*db_cursor_del_func) __P((SMDB_CURSOR *cursor,
unsigned int flags));
/*
** DB_CURSOR_GET -- Get the key/value of this cursor.
**
** Parameters:
** cursor -- The cursor.
** key -- The current key.
** value -- The current value
** flags -- flags
**
** Returns:
** 0 - Success, otherwise errno.
** SMDBE_LAST_ENTRY - This is a success condition that
** gets returned when the end of the
** database is hit.
**
*/
typedef int (*db_cursor_get_func) __P((SMDB_CURSOR *cursor,
SMDB_DBENT *key,
SMDB_DBENT *data,
unsigned int flags));
/*
** Flags for DB_CURSOR_GET
*/
#define SMDB_CURSOR_GET_FIRST 0
#define SMDB_CURSOR_GET_LAST 1
#define SMDB_CURSOR_GET_NEXT 2
#define SMDB_CURSOR_GET_RANGE 3
/*
** DB_CURSOR_PUT -- Put the key/value at this cursor.
**
** Parameters:
** cursor -- The cursor.
** key -- The current key.
** value -- The current value
** flags -- flags
**
** Returns:
** 0 - Success, otherwise errno.
**
*/
typedef int (*db_cursor_put_func) __P((SMDB_CURSOR *cursor,
SMDB_DBENT *key,
SMDB_DBENT *data,
unsigned int flags));
struct cursor_struct
{
db_cursor_close_func smdbc_close;
db_cursor_del_func smdbc_del;
db_cursor_get_func smdbc_get;
db_cursor_put_func smdbc_put;
void *smdbc_impl;
};
struct database_params_struct
{
unsigned int smdbp_num_elements;
unsigned int smdbp_cache_size;
bool smdbp_allow_dup;
};
typedef struct database_params_struct SMDB_DBPARAMS;
struct database_user_struct
{
uid_t smdbu_id;
gid_t smdbu_group_id;
char smdbu_name[SMDB_MAX_USER_NAME_LEN];
};
typedef struct database_user_struct SMDB_USER_INFO;
struct entry_struct
{
void *data;
size_t size;
};
typedef char *SMDB_DBTYPE;
typedef unsigned int SMDB_FLAG;
/*
** These are types of databases.
*/
# define SMDB_TYPE_DEFAULT NULL
# define SMDB_TYPE_DEFAULT_LEN 0
# define SMDB_TYPE_HASH "hash"
# define SMDB_TYPE_HASH_LEN 5
# define SMDB_TYPE_BTREE "btree"
# define SMDB_TYPE_BTREE_LEN 6
# define SMDB_TYPE_NDBM "dbm"
# define SMDB_TYPE_NDBM_LEN 4
/*
** These are flags
*/
/* Flags for put */
# define SMDBF_NO_OVERWRITE 0x00000001
# define SMDBF_ALLOW_DUP 0x00000002
extern SMDB_DATABASE *smdb_malloc_database __P((void));
extern void smdb_free_database __P((SMDB_DATABASE *));
extern int smdb_open_database __P((SMDB_DATABASE **, char *, int,
int, long, SMDB_DBTYPE,
SMDB_USER_INFO *,
SMDB_DBPARAMS *));
# ifdef NEWDB
extern int smdb_db_open __P((SMDB_DATABASE **, char *, int, int,
long, SMDB_DBTYPE, SMDB_USER_INFO *,
SMDB_DBPARAMS *));
# endif /* NEWDB */
# ifdef NDBM
extern int smdb_ndbm_open __P((SMDB_DATABASE **, char *, int, int,
long, SMDB_DBTYPE,
SMDB_USER_INFO *,
SMDB_DBPARAMS *));
# endif /* NDBM */
extern int smdb_add_extension __P((char *, int, char *, char *));
extern int smdb_setup_file __P((char *, char *, int, long,
SMDB_USER_INFO *, struct stat *));
extern int smdb_lock_file __P((int *, char *, int, long, char *));
extern int smdb_unlock_file __P((int));
extern int smdb_filechanged __P((char *, char *, int,
struct stat *));
extern void smdb_print_available_types __P((void));
extern char *smdb_db_definition __P((SMDB_DBTYPE));
extern int smdb_lock_map __P((SMDB_DATABASE *, int));
extern int smdb_unlock_map __P((SMDB_DATABASE *));
#endif /* ! _SMDB_H_ */
|
