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
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
|
/*
Unix SMB/Netbios implementation.
Version 3.0
tdb utility functions
Copyright (C) Andrew Tridgell 1992-1998
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
/* these are little tdb utility functions that are meant to make
dealing with a tdb database a little less cumbersome in Samba */
/****************************************************************************
Lock a chain by string.
****************************************************************************/
int tdb_lock_bystring(TDB_CONTEXT *tdb, char *keyval)
{
TDB_DATA key;
key.dptr = keyval;
key.dsize = strlen(keyval)+1;
return tdb_chainlock(tdb, key);
}
/****************************************************************************
Unlock a chain by string.
****************************************************************************/
void tdb_unlock_bystring(TDB_CONTEXT *tdb, char *keyval)
{
TDB_DATA key;
key.dptr = keyval;
key.dsize = strlen(keyval)+1;
tdb_chainunlock(tdb, key);
}
/****************************************************************************
Fetch a value by a arbitrary blob key, return -1 if not found.
JRA. DEPRECATED ! Use tdb_fetch_int32_byblob instead.
****************************************************************************/
int tdb_fetch_int_byblob(TDB_CONTEXT *tdb, char *keyval, size_t len)
{
TDB_DATA key, data;
int ret;
key.dptr = keyval;
key.dsize = len;
data = tdb_fetch(tdb, key);
if (!data.dptr || data.dsize != sizeof(int))
return -1;
memcpy(&ret, data.dptr, sizeof(int));
SAFE_FREE(data.dptr);
return ret;
}
/****************************************************************************
Fetch a value by string key, return -1 if not found.
JRA. DEPRECATED ! Use tdb_fetch_int32 instead.
****************************************************************************/
int tdb_fetch_int(TDB_CONTEXT *tdb, char *keystr)
{
return tdb_fetch_int_byblob(tdb, keystr, strlen(keystr) + 1);
}
/****************************************************************************
Store a value by an arbitary blob key, return 0 on success, -1 on failure.
JRA. DEPRECATED ! Use tdb_store_int32_byblob instead.
****************************************************************************/
int tdb_store_int_byblob(TDB_CONTEXT *tdb, char *keystr, size_t len, int v)
{
TDB_DATA key, data;
key.dptr = keystr;
key.dsize = len;
data.dptr = (void *)&v;
data.dsize = sizeof(int);
return tdb_store(tdb, key, data, TDB_REPLACE);
}
/****************************************************************************
Store a value by string key, return 0 on success, -1 on failure.
JRA. DEPRECATED ! Use tdb_store_int32 instead.
****************************************************************************/
int tdb_store_int(TDB_CONTEXT *tdb, char *keystr, int v)
{
return tdb_store_int_byblob(tdb, keystr, strlen(keystr) + 1, v);
}
/****************************************************************************
Fetch a int32 value by a arbitrary blob key, return -1 if not found.
Output is int32 in native byte order.
****************************************************************************/
int32 tdb_fetch_int32_byblob(TDB_CONTEXT *tdb, char *keyval, size_t len)
{
TDB_DATA key, data;
int32 ret;
key.dptr = keyval;
key.dsize = len;
data = tdb_fetch(tdb, key);
if (!data.dptr || data.dsize != sizeof(int32))
return -1;
ret = IVAL(data.dptr,0);
SAFE_FREE(data.dptr);
return ret;
}
/****************************************************************************
Fetch a int32 value by string key, return -1 if not found.
Output is int32 in native byte order.
****************************************************************************/
int32 tdb_fetch_int32(TDB_CONTEXT *tdb, char *keystr)
{
return tdb_fetch_int32_byblob(tdb, keystr, strlen(keystr) + 1);
}
/****************************************************************************
Store a int32 value by an arbitary blob key, return 0 on success, -1 on failure.
Input is int32 in native byte order. Output in tdb is in little-endian.
****************************************************************************/
int tdb_store_int32_byblob(TDB_CONTEXT *tdb, char *keystr, size_t len, int32 v)
{
TDB_DATA key, data;
int32 v_store;
key.dptr = keystr;
key.dsize = len;
SIVAL(&v_store,0,v);
data.dptr = (void *)&v_store;
data.dsize = sizeof(int32);
return tdb_store(tdb, key, data, TDB_REPLACE);
}
/****************************************************************************
Store a int32 value by string key, return 0 on success, -1 on failure.
Input is int32 in native byte order. Output in tdb is in little-endian.
****************************************************************************/
int tdb_store_int32(TDB_CONTEXT *tdb, char *keystr, int32 v)
{
return tdb_store_int32_byblob(tdb, keystr, strlen(keystr) + 1, v);
}
/****************************************************************************
Store a buffer by a null terminated string key. Return 0 on success, -1
on failure.
****************************************************************************/
int tdb_store_by_string(TDB_CONTEXT *tdb, char *keystr, void *buffer, int len)
{
TDB_DATA key, data;
key.dptr = keystr;
key.dsize = strlen(keystr) + 1;
data.dptr = buffer;
data.dsize = len;
return tdb_store(tdb, key, data, TDB_REPLACE);
}
/****************************************************************************
Fetch a buffer using a null terminated string key. Don't forget to call
free() on the result dptr.
****************************************************************************/
TDB_DATA tdb_fetch_by_string(TDB_CONTEXT *tdb, char *keystr)
{
TDB_DATA key;
key.dptr = keystr;
key.dsize = strlen(keystr) + 1;
return tdb_fetch(tdb, key);
}
/****************************************************************************
Atomic integer change. Returns old value. To create, set initial value in *oldval.
Deprecated. Use int32 version. JRA.
****************************************************************************/
int tdb_change_int_atomic(TDB_CONTEXT *tdb, char *keystr, int *oldval, int change_val)
{
int val;
int ret = -1;
if (tdb_lock_bystring(tdb, keystr) == -1)
return -1;
if ((val = tdb_fetch_int(tdb, keystr)) == -1) {
if (tdb_error(tdb) != TDB_ERR_NOEXIST)
goto err_out;
val = *oldval;
} else {
*oldval = val;
val += change_val;
}
if (tdb_store_int(tdb, keystr, val) == -1)
goto err_out;
ret = 0;
err_out:
tdb_unlock_bystring(tdb, keystr);
return ret;
}
/****************************************************************************
Atomic integer change. Returns old value. To create, set initial value in *oldval.
****************************************************************************/
int32 tdb_change_int32_atomic(TDB_CONTEXT *tdb, char *keystr, int32 *oldval, int32 change_val)
{
int32 val;
int32 ret = -1;
if (tdb_lock_bystring(tdb, keystr) == -1)
return -1;
if ((val = tdb_fetch_int32(tdb, keystr)) == -1) {
if (tdb_error(tdb) != TDB_ERR_NOEXIST)
goto err_out;
val = *oldval;
} else {
*oldval = val;
val += change_val;
}
if (tdb_store_int32(tdb, keystr, val) == -1)
goto err_out;
ret = 0;
err_out:
tdb_unlock_bystring(tdb, keystr);
return ret;
}
/****************************************************************************
Useful pair of routines for packing/unpacking data consisting of
integers and strings.
****************************************************************************/
size_t tdb_pack(char *buf, int bufsize, char *fmt, ...)
{
va_list ap;
uint16 w;
uint32 d;
int i;
void *p;
int len;
char *s;
char c;
char *buf0 = buf;
char *fmt0 = fmt;
int bufsize0 = bufsize;
va_start(ap, fmt);
while (*fmt) {
switch ((c = *fmt++)) {
case 'w':
len = 2;
w = (uint16)va_arg(ap, int);
if (bufsize >= len)
SSVAL(buf, 0, w);
break;
case 'd':
len = 4;
d = va_arg(ap, uint32);
if (bufsize >= len)
SIVAL(buf, 0, d);
break;
case 'p':
len = 4;
p = va_arg(ap, void *);
d = p?1:0;
if (bufsize >= len)
SIVAL(buf, 0, d);
break;
case 'P':
s = va_arg(ap,char *);
w = strlen(s);
len = w + 1;
if (bufsize >= len)
memcpy(buf, s, len);
break;
case 'f':
s = va_arg(ap,char *);
w = strlen(s);
len = w + 1;
if (bufsize >= len)
memcpy(buf, s, len);
break;
case 'B':
i = va_arg(ap, int);
s = va_arg(ap, char *);
len = 4+i;
if (bufsize >= len) {
SIVAL(buf, 0, i);
memcpy(buf+4, s, i);
}
break;
default:
DEBUG(0,("Unknown tdb_pack format %c in %s\n",
c, fmt));
len = 0;
break;
}
buf += len;
bufsize -= len;
}
va_end(ap);
DEBUG(18,("tdb_pack(%s, %d) -> %d\n",
fmt0, bufsize0, (int)PTR_DIFF(buf, buf0)));
return PTR_DIFF(buf, buf0);
}
/****************************************************************************
Useful pair of routines for packing/unpacking data consisting of
integers and strings.
****************************************************************************/
int tdb_unpack(char *buf, int bufsize, char *fmt, ...)
{
va_list ap;
uint16 *w;
uint32 *d;
int len;
int *i;
void **p;
char *s, **b;
char c;
char *buf0 = buf;
char *fmt0 = fmt;
int bufsize0 = bufsize;
va_start(ap, fmt);
while (*fmt) {
switch ((c=*fmt++)) {
case 'w':
len = 2;
w = va_arg(ap, uint16 *);
if (bufsize < len)
goto no_space;
*w = SVAL(buf, 0);
break;
case 'd':
len = 4;
d = va_arg(ap, uint32 *);
if (bufsize < len)
goto no_space;
*d = IVAL(buf, 0);
break;
case 'p':
len = 4;
p = va_arg(ap, void **);
if (bufsize < len)
goto no_space;
*p = (void *)IVAL(buf, 0);
break;
case 'P':
s = va_arg(ap,char *);
len = strlen(buf) + 1;
if (bufsize < len || len > sizeof(pstring))
goto no_space;
memcpy(s, buf, len);
break;
case 'f':
s = va_arg(ap,char *);
len = strlen(buf) + 1;
if (bufsize < len || len > sizeof(fstring))
goto no_space;
memcpy(s, buf, len);
break;
case 'B':
i = va_arg(ap, int *);
b = va_arg(ap, char **);
len = 4;
if (bufsize < len)
goto no_space;
*i = IVAL(buf, 0);
if (! *i) {
*b = NULL;
break;
}
len += *i;
if (bufsize < len)
goto no_space;
*b = (char *)malloc(*i);
if (! *b)
goto no_space;
memcpy(*b, buf+4, *i);
break;
default:
DEBUG(0,("Unknown tdb_unpack format %c in %s\n",
c, fmt));
len = 0;
break;
}
buf += len;
bufsize -= len;
}
va_end(ap);
DEBUG(18,("tdb_unpack(%s, %d) -> %d\n",
fmt0, bufsize0, (int)PTR_DIFF(buf, buf0)));
return PTR_DIFF(buf, buf0);
no_space:
return -1;
}
/****************************************************************************
Log tdb messages via DEBUG().
****************************************************************************/
static void tdb_log(TDB_CONTEXT *tdb, int level, const char *format, ...)
{
va_list ap;
char *ptr = NULL;
va_start(ap, format);
vasprintf(&ptr, format, ap);
va_end(ap);
if (!ptr || !*ptr)
return;
DEBUG(level, ("tdb(%s): %s", tdb->name ? tdb->name : "unknown", ptr));
SAFE_FREE(ptr);
}
/****************************************************************************
Like tdb_open() but also setup a logging function that redirects to
the samba DEBUG() system.
****************************************************************************/
TDB_CONTEXT *tdb_open_log(const char *name, int hash_size, int tdb_flags,
int open_flags, mode_t mode)
{
TDB_CONTEXT *tdb;
if (!lp_use_mmap())
tdb_flags |= TDB_NOMMAP;
tdb = tdb_open_ex(name, hash_size, tdb_flags,
open_flags, mode, tdb_log);
if (!tdb)
return NULL;
return tdb;
}
/****************************************************************************
Allow tdb_delete to be used as a tdb_traversal_fn.
****************************************************************************/
int tdb_traverse_delete_fn(TDB_CONTEXT *the_tdb, TDB_DATA key, TDB_DATA dbuf,
void *state)
{
return tdb_delete(the_tdb, key);
}
|