summaryrefslogtreecommitdiffstats
path: root/source3/lib/time.c
blob: 0d44a08d3f399e6c197ea35f9210ffe07b0b543a (plain)
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
/*
   Unix SMB/CIFS implementation.
   time handling functions

   Copyright (C) Andrew Tridgell 		1992-2004
   Copyright (C) Stefan (metze) Metzmacher	2002
   Copyright (C) Jeremy Allison			2007

   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 3 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, see <http://www.gnu.org/licenses/>.
*/

#include "includes.h"

/**
 * @file
 * @brief time handling functions
 */


#define NTTIME_INFINITY (NTTIME)0x8000000000000000LL

#define TIME_FIXUP_CONSTANT_INT INT64_C(11644473600)

/**************************************************************
 Handle conversions between time_t and uint32, taking care to
 preserve the "special" values.
**************************************************************/

uint32_t convert_time_t_to_uint32_t(time_t t)
{
#if (defined(SIZEOF_TIME_T) && (SIZEOF_TIME_T == 8))
	/* time_t is 64-bit. */
	if (t == 0x8000000000000000LL) {
		return 0x80000000;
	} else if (t == 0x7FFFFFFFFFFFFFFFLL) {
		return 0x7FFFFFFF;
	}
#endif
	return (uint32_t)t;
}

time_t convert_uint32_t_to_time_t(uint32_t u)
{
#if (defined(SIZEOF_TIME_T) && (SIZEOF_TIME_T == 8))
	/* time_t is 64-bit. */
	if (u == 0x80000000) {
		return (time_t)0x8000000000000000LL;
	} else if (u == 0x7FFFFFFF) {
		return (time_t)0x7FFFFFFFFFFFFFFFLL;
	}
#endif
	return (time_t)u;
}

/****************************************************************************
 Check if NTTIME is 0.
****************************************************************************/

bool nt_time_is_zero(const NTTIME *nt)
{
	return (*nt == 0);
}

/****************************************************************************
 Convert ASN.1 GeneralizedTime string to unix-time.
 Returns 0 on failure; Currently ignores timezone.
****************************************************************************/

time_t generalized_to_unix_time(const char *str)
{
	struct tm tm;

	ZERO_STRUCT(tm);

	if (sscanf(str, "%4d%2d%2d%2d%2d%2d",
		   &tm.tm_year, &tm.tm_mon, &tm.tm_mday,
		   &tm.tm_hour, &tm.tm_min, &tm.tm_sec) != 6) {
		return 0;
	}
	tm.tm_year -= 1900;
	tm.tm_mon -= 1;

	return timegm(&tm);
}

/*******************************************************************
 Accessor function for the server time zone offset.
 set_server_zone_offset() must have been called first.
******************************************************************/

static int server_zone_offset;

int get_server_zone_offset(void)
{
	return server_zone_offset;
}

/*******************************************************************
 Initialize the server time zone offset. Called when a client connects.
******************************************************************/

int set_server_zone_offset(time_t t)
{
	server_zone_offset = get_time_zone(t);
	return server_zone_offset;
}

/***************************************************************************
 Server versions of the above functions.
***************************************************************************/

void srv_put_dos_date(char *buf,int offset,time_t unixdate)
{
	push_dos_date((uint8_t *)buf, offset, unixdate, server_zone_offset);
}

void srv_put_dos_date2_ts(char *buf, int offset, struct timespec unix_ts)
{
	time_t unixdate = convert_timespec_to_time_t(unix_ts);
	push_dos_date2((uint8_t *)buf, offset, unixdate, server_zone_offset);
}

void srv_put_dos_date3(char *buf,int offset,time_t unixdate)
{
	push_dos_date3((uint8_t *)buf, offset, unixdate, server_zone_offset);
}

void round_timespec(enum timestamp_set_resolution res, struct timespec *ts)
{
	if (is_omit_timespec(ts)) {
		return;
	}

	switch (res) {
		case TIMESTAMP_SET_SECONDS:
			round_timespec_to_sec(ts);
			break;
		case TIMESTAMP_SET_MSEC:
			round_timespec_to_usec(ts);
			break;
		case TIMESTAMP_SET_NT_OR_BETTER:
			/* No rounding needed. */
			break;
        }
}

/****************************************************************************
 Take a Unix time and convert to an NTTIME structure and place in buffer
 pointed to by p, rounded to the correct resolution.
****************************************************************************/

void put_long_date_timespec(enum timestamp_set_resolution res, char *p, struct timespec ts)
{
	NTTIME nt;
	round_timespec(res, &ts);
	nt = unix_timespec_to_nt_time(ts);
	SBVAL(p, 0, nt);
}

void put_long_date_full_timespec(enum timestamp_set_resolution res,
				 char *p,
				 const struct timespec *_ts)
{
	struct timespec ts = *_ts;
	NTTIME nt;

	round_timespec(res, &ts);
	nt = full_timespec_to_nt_time(&ts);
	SBVAL(p, 0, nt);
}

struct timespec pull_long_date_full_timespec(const char *p)
{
	NTTIME nt = BVAL(p, 0);

	return nt_time_to_full_timespec(nt);
}

void put_long_date(char *p, time_t t)
{
	struct timespec ts;
	ts.tv_sec = t;
	ts.tv_nsec = 0;
	put_long_date_timespec(TIMESTAMP_SET_SECONDS, p, ts);
}

void dos_filetime_timespec(struct timespec *tsp)
{
	tsp->tv_sec &= ~1;
	tsp->tv_nsec = 0;
}

/*******************************************************************
 Create a unix date (int GMT) from a dos date (which is actually in
 localtime).
********************************************************************/

time_t make_unix_date(const void *date_ptr, int zone_offset)
{
	return pull_dos_date(date_ptr, zone_offset);
}

/*******************************************************************
 Like make_unix_date() but the words are reversed.
********************************************************************/

time_t make_unix_date2(const void *date_ptr, int zone_offset)
{
	return pull_dos_date2(date_ptr, zone_offset);
}

/*******************************************************************
 Create a unix GMT date from a dos date in 32 bit "unix like" format
 these generally arrive as localtimes, with corresponding DST.
******************************************************************/

time_t make_unix_date3(const void *date_ptr, int zone_offset)
{
	return pull_dos_date3(date_ptr, zone_offset);
}

time_t srv_make_unix_date(const void *date_ptr)
{
	return make_unix_date(date_ptr, server_zone_offset);
}

time_t srv_make_unix_date2(const void *date_ptr)
{
	return make_unix_date2(date_ptr, server_zone_offset);
}

time_t srv_make_unix_date3(const void *date_ptr)
{
	return make_unix_date3(date_ptr, server_zone_offset);
}

/****************************************************************************
 Interprets an nt time into a unix struct timespec.
 Differs from nt_time_to_unix in that an 8 byte value of 0xffffffffffffffff
 will be returned as (time_t)-1, whereas nt_time_to_unix returns 0 in this case.
****************************************************************************/

struct timespec interpret_long_date(NTTIME nt)
{
	if (nt == (uint64_t)-1) {
		struct timespec ret;
		ret.tv_sec = (time_t)-1;
		ret.tv_nsec = 0;
		return ret;
	}
	return nt_time_to_full_timespec(nt);
}

/*******************************************************************
 Re-read the smb serverzone value.
******************************************************************/

static struct timeval start_time_hires;

void TimeInit(void)
{
	set_server_zone_offset(time(NULL));

	DEBUG(4,("TimeInit: Serverzone is %d\n", server_zone_offset));

	/* Save the start time of this process. */
	if (start_time_hires.tv_sec == 0 && start_time_hires.tv_usec == 0) {
		GetTimeOfDay(&start_time_hires);
	}
}

/**********************************************************************
 Return a timeval struct of the uptime of this process. As TimeInit is
 done before a daemon fork then this is the start time from the parent
 daemon start. JRA.
***********************************************************************/

void get_process_uptime(struct timeval *ret_time)
{
	struct timeval time_now_hires;

	GetTimeOfDay(&time_now_hires);
	ret_time->tv_sec = time_now_hires.tv_sec - start_time_hires.tv_sec;
	if (time_now_hires.tv_usec < start_time_hires.tv_usec) {
		ret_time->tv_sec -= 1;
		ret_time->tv_usec = 1000000 + (time_now_hires.tv_usec - start_time_hires.tv_usec);
	} else {
		ret_time->tv_usec = time_now_hires.tv_usec - start_time_hires.tv_usec;
	}
}

/**
 * @brief Get the startup time of the server.
 *
 * @param[out] ret_time A pointer to a timveal structure to set the startup
 *                      time.
 */
void get_startup_time(struct timeval *ret_time)
{
	ret_time->tv_sec = start_time_hires.tv_sec;
	ret_time->tv_usec = start_time_hires.tv_usec;
}


/****************************************************************************
 Convert a NTTIME structure to a time_t.
 It's originally in "100ns units".

 This is an absolute version of the one above.
 By absolute I mean, it doesn't adjust from 1/1/1601 to 1/1/1970
 if the NTTIME was 5 seconds, the time_t is 5 seconds. JFM
****************************************************************************/

time_t nt_time_to_unix_abs(const NTTIME *nt)
{
	uint64_t d;

	if (*nt == 0) {
		return (time_t)0;
	}

	if (*nt == (uint64_t)-1) {
		return (time_t)-1;
	}

	if (*nt == NTTIME_INFINITY) {
		return (time_t)-1;
	}

	/* reverse the time */
	/* it's a negative value, turn it to positive */
	d=~*nt;

	d += 1000*1000*10/2;
	d /= 1000*1000*10;

	if (!(TIME_T_MIN <= ((time_t)d) && ((time_t)d) <= TIME_T_MAX)) {
		return (time_t)0;
	}

	return (time_t)d;
}

/****************************************************************************
 Convert a time_t to a NTTIME structure

 This is an absolute version of the one above.
 By absolute I mean, it doesn't adjust from 1/1/1970 to 1/1/1601
 If the time_t was 5 seconds, the NTTIME is 5 seconds. JFM
****************************************************************************/

void unix_to_nt_time_abs(NTTIME *nt, time_t t)
{
	double d;

	if (t==0) {
		*nt = 0;
		return;
	}

	if (t == TIME_T_MAX) {
		*nt = 0x7fffffffffffffffLL;
		return;
	}

	if (t == (time_t)-1) {
		/* that's what NT uses for infinite */
		*nt = NTTIME_INFINITY;
		return;
	}

	d = (double)(t);
	d *= 1.0e7;

	*nt = (NTTIME)d;

	/* convert to a negative value */
	*nt=~*nt;
}


/****************************************************************************
 Utility function that always returns a const string even if localtime
 and asctime fail.
****************************************************************************/

const char *time_to_asc(const time_t t)
{
	const char *asct;
	struct tm *lt = localtime(&t);

	if (!lt) {
		return "unknown time\n";
	}

	asct = asctime(lt);
	if (!asct) {
		return "unknown time\n";
	}
	return asct;
}

const char *display_time(NTTIME nttime)
{
	float high;
	float low;
	int sec;
	int days, hours, mins, secs;

	if (nttime==0)
		return "Now";

	if (nttime==NTTIME_INFINITY)
		return "Never";

	high = 65536;
	high = high/10000;
	high = high*65536;
	high = high/1000;
	high = high * (~(nttime >> 32));

	low = ~(nttime & 0xFFFFFFFF);
	low = low/(1000*1000*10);

	sec=(int)(high+low);

	days=sec/(60*60*24);
	hours=(sec - (days*60*60*24)) / (60*60);
	mins=(sec - (days*60*60*24) - (hours*60*60) ) / 60;
	secs=sec - (days*60*60*24) - (hours*60*60) - (mins*60);

	return talloc_asprintf(talloc_tos(), "%u days, %u hours, %u minutes, "
			       "%u seconds", days, hours, mins, secs);
}

bool nt_time_is_set(const NTTIME *nt)
{
	if (*nt == 0x7FFFFFFFFFFFFFFFLL) {
		return false;
	}

	if (*nt == NTTIME_INFINITY) {
		return false;
	}

	return true;
}