summaryrefslogtreecommitdiffstats
path: root/source3/lib/time.c
blob: 9d87414aea058f01e612a64039754a936a792884 (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
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
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
/* 
   Unix SMB/CIFS implementation.
   time handling 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"

/*
  This stuff was largely rewritten by Paul Eggert <eggert@twinsun.com>
  in May 1996 
  */


int extra_time_offset = 0;

#ifndef CHAR_BIT
#define CHAR_BIT 8
#endif

#ifndef TIME_T_MIN
#define TIME_T_MIN ((time_t)0 < (time_t) -1 ? (time_t) 0 \
		    : ~ (time_t) 0 << (sizeof (time_t) * CHAR_BIT - 1))
#endif
#ifndef TIME_T_MAX
#define TIME_T_MAX (~ (time_t) 0 - TIME_T_MIN)
#endif

/*******************************************************************
 External access to time_t_min and time_t_max.
********************************************************************/

time_t get_time_t_max(void)
{
	return TIME_T_MAX;
}

/*******************************************************************
a gettimeofday wrapper
********************************************************************/
void GetTimeOfDay(struct timeval *tval)
{
#ifdef HAVE_GETTIMEOFDAY_TZ
	gettimeofday(tval,NULL);
#else
	gettimeofday(tval);
#endif
}

#define TM_YEAR_BASE 1900

/*******************************************************************
yield the difference between *A and *B, in seconds, ignoring leap seconds
********************************************************************/
static int tm_diff(struct tm *a, struct tm *b)
{
  int ay = a->tm_year + (TM_YEAR_BASE - 1);
  int by = b->tm_year + (TM_YEAR_BASE - 1);
  int intervening_leap_days =
    (ay/4 - by/4) - (ay/100 - by/100) + (ay/400 - by/400);
  int years = ay - by;
  int days = 365*years + intervening_leap_days + (a->tm_yday - b->tm_yday);
  int hours = 24*days + (a->tm_hour - b->tm_hour);
  int minutes = 60*hours + (a->tm_min - b->tm_min);
  int seconds = 60*minutes + (a->tm_sec - b->tm_sec);

  return seconds;
}

/*******************************************************************
  return the UTC offset in seconds west of UTC, or 0 if it cannot be determined
  ******************************************************************/
static int TimeZone(time_t t)
{
  struct tm *tm = gmtime(&t);
  struct tm tm_utc;
  if (!tm)
    return 0;
  tm_utc = *tm;
  tm = localtime(&t);
  if (!tm)
    return 0;
  return tm_diff(&tm_utc,tm);

}

static BOOL done_serverzone_init;

/* Return the smb serverzone value */

static int get_serverzone(void)
{
        static int serverzone;

        if (!done_serverzone_init) {
                serverzone = TimeZone(time(NULL));

                if ((serverzone % 60) != 0) {
                        DEBUG(1,("WARNING: Your timezone is not a multiple of 1 minute.\n"));
                }

                DEBUG(4,("Serverzone is %d\n",serverzone));

                done_serverzone_init = True;
        }

        return serverzone;
}

/* Re-read the smb serverzone value */

static struct timeval start_time_hires;

void TimeInit(void)
{
	done_serverzone_init = False;
	get_serverzone();
	/* 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;
	ret_time->tv_usec = time_now_hires.tv_usec - start_time_hires.tv_usec;
	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;
}

/*******************************************************************
return the same value as TimeZone, but it should be more efficient.

We keep a table of DST offsets to prevent calling localtime() on each 
call of this function. This saves a LOT of time on many unixes.

Updated by Paul Eggert <eggert@twinsun.com>
********************************************************************/
static int TimeZoneFaster(time_t t)
{
  static struct dst_table {time_t start,end; int zone;} *tdt, *dst_table = NULL;
  static int table_size = 0;
  int i;
  int zone = 0;

  if (t == 0) t = time(NULL);

  /* Tunis has a 8 day DST region, we need to be careful ... */
#define MAX_DST_WIDTH (365*24*60*60)
#define MAX_DST_SKIP (7*24*60*60)

  for (i=0;i<table_size;i++)
    if (t >= dst_table[i].start && t <= dst_table[i].end) break;

  if (i<table_size) {
    zone = dst_table[i].zone;
  } else {
    time_t low,high;

    zone = TimeZone(t);
    tdt = (struct dst_table *)Realloc(dst_table,
					      sizeof(dst_table[0])*(i+1));
    if (!tdt) {
      DEBUG(0,("TimeZoneFaster: out of memory!\n"));
      SAFE_FREE(dst_table);
      table_size = 0;
    } else {
      dst_table = tdt;
      table_size++;

      dst_table[i].zone = zone; 
      dst_table[i].start = dst_table[i].end = t;
    
      /* no entry will cover more than 6 months */
      low = t - MAX_DST_WIDTH/2;
      if (t < low)
	low = TIME_T_MIN;
      
      high = t + MAX_DST_WIDTH/2;
      if (high < t)
	high = TIME_T_MAX;
      
      /* widen the new entry using two bisection searches */
      while (low+60*60 < dst_table[i].start) {
	if (dst_table[i].start - low > MAX_DST_SKIP*2)
	  t = dst_table[i].start - MAX_DST_SKIP;
	else
	  t = low + (dst_table[i].start-low)/2;
	if (TimeZone(t) == zone)
	  dst_table[i].start = t;
	else
	  low = t;
      }

      while (high-60*60 > dst_table[i].end) {
	if (high - dst_table[i].end > MAX_DST_SKIP*2)
	  t = dst_table[i].end + MAX_DST_SKIP;
	else
	  t = high - (high-dst_table[i].end)/2;
	if (TimeZone(t) == zone)
	  dst_table[i].end = t;
	else
	  high = t;
      }
#if 0
      DEBUG(1,("Added DST entry from %s ",
	       asctime(localtime(&dst_table[i].start))));
      DEBUG(1,("to %s (%d)\n",asctime(localtime(&dst_table[i].end)),
	       dst_table[i].zone));
#endif
    }
  }
  return zone;
}

/****************************************************************************
  return the UTC offset in seconds west of UTC, adjusted for extra time offset
  **************************************************************************/
int TimeDiff(time_t t)
{
  return TimeZoneFaster(t) + 60*extra_time_offset;
}


/****************************************************************************
  return the UTC offset in seconds west of UTC, adjusted for extra time
  offset, for a local time value.  If ut = lt + LocTimeDiff(lt), then
  lt = ut - TimeDiff(ut), but the converse does not necessarily hold near
  daylight savings transitions because some local times are ambiguous.
  LocTimeDiff(t) equals TimeDiff(t) except near daylight savings transitions.
  +**************************************************************************/
static int LocTimeDiff(time_t lte)
{
  time_t lt = lte - 60*extra_time_offset;
  int d = TimeZoneFaster(lt);
  time_t t = lt + d;

  /* if overflow occurred, ignore all the adjustments so far */
  if (((lte < lt) ^ (extra_time_offset < 0))  |  ((t < lt) ^ (d < 0)))
    t = lte;

  /* now t should be close enough to the true UTC to yield the right answer */
  return TimeDiff(t);
}


/****************************************************************************
try to optimise the localtime call, it can be quite expensive on some machines
****************************************************************************/
struct tm *LocalTime(time_t *t)
{
  time_t t2 = *t;

  t2 -= TimeDiff(t2);

  return(gmtime(&t2));
}

#define TIME_FIXUP_CONSTANT (369.0*365.25*24*60*60-(3.0*24*60*60+6.0*60*60))

/****************************************************************************
interpret an 8 byte "filetime" structure to a time_t
It's originally in "100ns units since jan 1st 1601"

It appears to be kludge-GMT (at least for file listings). This means
its the GMT you get by taking a localtime and adding the
serverzone. This is NOT the same as GMT in some cases. This routine
converts this to real GMT.
****************************************************************************/
time_t nt_time_to_unix(NTTIME *nt)
{
  double d;
  time_t ret;
  /* The next two lines are a fix needed for the 
     broken SCO compiler. JRA. */
  time_t l_time_min = TIME_T_MIN;
  time_t l_time_max = TIME_T_MAX;

  if (nt->high == 0) return(0);

  d = ((double)nt->high)*4.0*(double)(1<<30);
  d += (nt->low&0xFFF00000);
  d *= 1.0e-7;
 
  /* now adjust by 369 years to make the secs since 1970 */
  d -= TIME_FIXUP_CONSTANT;

  if (!(l_time_min <= d && d <= l_time_max))
    return(0);

  ret = (time_t)(d+0.5);

  /* this takes us from kludge-GMT to real GMT */
  ret -= get_serverzone();
  ret += LocTimeDiff(ret);

  return(ret);
}

/****************************************************************************
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(NTTIME *nt)
{
	double d;
	time_t ret;
	/* The next two lines are a fix needed for the 
	   broken SCO compiler. JRA. */
	time_t l_time_min = TIME_T_MIN;
	time_t l_time_max = TIME_T_MAX;

	if (nt->high == 0)
		return(0);

	if (nt->high==0x80000000 && nt->low==0)
		return -1;

	/* reverse the time */
	/* it's a negative value, turn it to positive */
	nt->high=~nt->high;
	nt->low=~nt->low;

	d = ((double)nt->high)*4.0*(double)(1<<30);
	d += (nt->low&0xFFF00000);
	d *= 1.0e-7;
  
	if (!(l_time_min <= d && d <= l_time_max))
		return(0);

	ret = (time_t)(d+0.5);

	/* this takes us from kludge-GMT to real GMT */
	ret -= get_serverzone();
	ret += LocTimeDiff(ret);

	return(ret);
}



/****************************************************************************
interprets an nt time into a unix time_t
****************************************************************************/
time_t interpret_long_date(char *p)
{
	NTTIME nt;
	nt.low = IVAL(p,0);
	nt.high = IVAL(p,4);
	return nt_time_to_unix(&nt);
}

/****************************************************************************
put a 8 byte filetime from a time_t
This takes real GMT as input and converts to kludge-GMT
****************************************************************************/
void unix_to_nt_time(NTTIME *nt, time_t t)
{
	double d;

	if (t==0)
	{
		nt->low = 0;
		nt->high = 0;
		return;
	}
	if (t == TIME_T_MAX)
	{
		nt->low = 0xffffffff;
		nt->high = 0x7fffffff;
		return;
	}		
	if (t == -1)
	{
		nt->low = 0xffffffff;
		nt->high = 0xffffffff;
		return;
	}		

	/* this converts GMT to kludge-GMT */
	t -= TimeDiff(t) - get_serverzone(); 

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

	nt->high = (uint32)(d * (1.0/(4.0*(double)(1<<30))));
	nt->low  = (uint32)(d - ((double)nt->high)*4.0*(double)(1<<30));
}

/****************************************************************************
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 nttime_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->low = 0;
		nt->high = 0;
		return;
	}

	if (t == TIME_T_MAX) {
		nt->low = 0xffffffff;
		nt->high = 0x7fffffff;
		return;
	}
		
	if (t == -1) {
		/* that's what NT uses for infinite */
		nt->low = 0x0;
		nt->high = 0x80000000;
		return;
	}		

	/* this converts GMT to kludge-GMT */
	t -= LocTimeDiff(t) - get_serverzone(); 

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

	nt->high = (uint32)(d * (1.0/(4.0*(double)(1<<30))));
	nt->low  = (uint32)(d - ((double)nt->high)*4.0*(double)(1<<30));

	/* convert to a negative value */
	nt->high=~nt->high;
	nt->low=~nt->low;
}


/****************************************************************************
take an NTTIME structure, containing high / low time.  convert to unix time.
lkclXXXX this may need 2 SIVALs not a memcpy.  we'll see...
****************************************************************************/
void put_long_date(char *p,time_t t)
{
	NTTIME nt;
	unix_to_nt_time(&nt, t);
	SIVAL(p, 0, nt.low);
	SIVAL(p, 4, nt.high);
}

/****************************************************************************
check if it's a null mtime
****************************************************************************/
BOOL null_mtime(time_t mtime)
{
  if (mtime == 0 || mtime == 0xFFFFFFFF || mtime == (time_t)-1)
    return(True);
  return(False);
}

/*******************************************************************
  create a 16 bit dos packed date
********************************************************************/
static uint16 make_dos_date1(struct tm *t)
{
  uint16 ret=0;
  ret = (((unsigned)(t->tm_mon+1)) >> 3) | ((t->tm_year-80) << 1);
  ret = ((ret&0xFF)<<8) | (t->tm_mday | (((t->tm_mon+1) & 0x7) << 5));
  return(ret);
}

/*******************************************************************
  create a 16 bit dos packed time
********************************************************************/
static uint16 make_dos_time1(struct tm *t)
{
  uint16 ret=0;
  ret = ((((unsigned)t->tm_min >> 3)&0x7) | (((unsigned)t->tm_hour) << 3));
  ret = ((ret&0xFF)<<8) | ((t->tm_sec/2) | ((t->tm_min & 0x7) << 5));
  return(ret);
}

/*******************************************************************
  create a 32 bit dos packed date/time from some parameters
  This takes a GMT time and returns a packed localtime structure
********************************************************************/
static uint32 make_dos_date(time_t unixdate)
{
  struct tm *t;
  uint32 ret=0;

  t = LocalTime(&unixdate);
  if (!t)
    return 0xFFFFFFFF;

  ret = make_dos_date1(t);
  ret = ((ret&0xFFFF)<<16) | make_dos_time1(t);

  return(ret);
}

/*******************************************************************
put a dos date into a buffer (time/date format)
This takes GMT time and puts local time in the buffer
********************************************************************/
void put_dos_date(char *buf,int offset,time_t unixdate)
{
  uint32 x = make_dos_date(unixdate);
  SIVAL(buf,offset,x);
}

/*******************************************************************
put a dos date into a buffer (date/time format)
This takes GMT time and puts local time in the buffer
********************************************************************/
void put_dos_date2(char *buf,int offset,time_t unixdate)
{
  uint32 x = make_dos_date(unixdate);
  x = ((x&0xFFFF)<<16) | ((x&0xFFFF0000)>>16);
  SIVAL(buf,offset,x);
}

/*******************************************************************
put a dos 32 bit "unix like" date into a buffer. This routine takes
GMT and converts it to LOCAL time before putting it (most SMBs assume
localtime for this sort of date)
********************************************************************/
void put_dos_date3(char *buf,int offset,time_t unixdate)
{
  if (!null_mtime(unixdate))
    unixdate -= TimeDiff(unixdate);
  SIVAL(buf,offset,unixdate);
}

/*******************************************************************
  interpret a 32 bit dos packed date/time to some parameters
********************************************************************/
static void interpret_dos_date(uint32 date,int *year,int *month,int *day,int *hour,int *minute,int *second)
{
  uint32 p0,p1,p2,p3;

  p0=date&0xFF; p1=((date&0xFF00)>>8)&0xFF; 
  p2=((date&0xFF0000)>>16)&0xFF; p3=((date&0xFF000000)>>24)&0xFF;

  *second = 2*(p0 & 0x1F);
  *minute = ((p0>>5)&0xFF) + ((p1&0x7)<<3);
  *hour = (p1>>3)&0xFF;
  *day = (p2&0x1F);
  *month = ((p2>>5)&0xFF) + ((p3&0x1)<<3) - 1;
  *year = ((p3>>1)&0xFF) + 80;
}

/*******************************************************************
  create a unix date (int GMT) from a dos date (which is actually in
  localtime)
********************************************************************/
time_t make_unix_date(void *date_ptr)
{
  uint32 dos_date=0;
  struct tm t;
  time_t ret;

  dos_date = IVAL(date_ptr,0);

  if (dos_date == 0) return(0);
  
  interpret_dos_date(dos_date,&t.tm_year,&t.tm_mon,
		     &t.tm_mday,&t.tm_hour,&t.tm_min,&t.tm_sec);
  t.tm_isdst = -1;
  
  /* mktime() also does the local to GMT time conversion for us */
  ret = mktime(&t);

  return(ret);
}

/*******************************************************************
like make_unix_date() but the words are reversed
********************************************************************/
time_t make_unix_date2(void *date_ptr)
{
  uint32 x,x2;

  x = IVAL(date_ptr,0);
  x2 = ((x&0xFFFF)<<16) | ((x&0xFFFF0000)>>16);
  SIVAL(&x,0,x2);

  return(make_unix_date((void *)&x));
}

/*******************************************************************
  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(void *date_ptr)
{
  time_t t = (time_t)IVAL(date_ptr,0);
  if (!null_mtime(t))
    t += LocTimeDiff(t);
  return(t);
}


/***************************************************************************
return a HTTP/1.0 time string
  ***************************************************************************/
char *http_timestring(time_t t)
{
  static fstring buf;
  struct tm *tm = LocalTime(&t);

  if (!tm)
    slprintf(buf,sizeof(buf)-1,"%ld seconds since the Epoch",(long)t);
  else
#ifndef HAVE_STRFTIME
  fstrcpy(buf, asctime(tm));
  if(buf[strlen(buf)-1] == '\n')
    buf[strlen(buf)-1] = 0;
#else /* !HAVE_STRFTIME */
  strftime(buf, sizeof(buf)-1, "%a, %d %b %Y %H:%M:%S %Z", tm);
#endif /* !HAVE_STRFTIME */
  return buf;
}



/****************************************************************************
 Return the date and time as a string
****************************************************************************/

char *timestring(BOOL hires)
{
	static fstring TimeBuf;
	struct timeval tp;
	time_t t;
	struct tm *tm;

	if (hires) {
		GetTimeOfDay(&tp);
		t = (time_t)tp.tv_sec;
	} else {
		t = time(NULL);
	}
	tm = LocalTime(&t);
	if (!tm) {
		if (hires) {
			slprintf(TimeBuf,
				 sizeof(TimeBuf)-1,
				 "%ld.%06ld seconds since the Epoch",
				 (long)tp.tv_sec, 
				 (long)tp.tv_usec);
		} else {
			slprintf(TimeBuf,
				 sizeof(TimeBuf)-1,
				 "%ld seconds since the Epoch",
				 (long)t);
		}
	} else {
#ifdef HAVE_STRFTIME
		if (hires) {
			strftime(TimeBuf,sizeof(TimeBuf)-1,"%Y/%m/%d %H:%M:%S",tm);
			slprintf(TimeBuf+strlen(TimeBuf),
				 sizeof(TimeBuf)-1 - strlen(TimeBuf), 
				 ".%06ld", 
				 (long)tp.tv_usec);
		} else {
			strftime(TimeBuf,100,"%Y/%m/%d %H:%M:%S",tm);
		}
#else
		if (hires) {
			slprintf(TimeBuf, 
				 sizeof(TimeBuf)-1, 
				 "%s.%06ld", 
				 asctime(tm), 
				 (long)tp.tv_usec);
		} else {
			fstrcpy(TimeBuf, asctime(tm));
		}
#endif
	}
	return(TimeBuf);
}

/****************************************************************************
  return the best approximation to a 'create time' under UNIX from a stat
  structure.
****************************************************************************/

time_t get_create_time(SMB_STRUCT_STAT *st,BOOL fake_dirs)
{
  time_t ret, ret1;

  if(S_ISDIR(st->st_mode) && fake_dirs)
    return (time_t)315493200L;          /* 1/1/1980 */
    
  ret = MIN(st->st_ctime, st->st_mtime);
  ret1 = MIN(ret, st->st_atime);

  if(ret1 != (time_t)0)
    return ret1;

  /*
   * One of ctime, mtime or atime was zero (probably atime).
   * Just return MIN(ctime, mtime).
   */
  return ret;
}

/****************************************************************************
initialise an NTTIME to -1, which means "unknown" or "don't expire"
****************************************************************************/

void init_nt_time(NTTIME *nt)
{
	nt->high = 0x7FFFFFFF;
	nt->low = 0xFFFFFFFF;
}