source3/lib/time.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    time handling functions
   4
   5    Copyright (C) Andrew Tridgell                1992-2004
   6    Copyright (C) Stefan (metze) Metzmacher      2002
   7    Copyright (C) Jeremy Allison                 2007
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 */
  22
  23 #include "includes.h"
  24
  25 /**
  26  * @file
  27  * @brief time handling functions
  28  */
  29
  30
  31 #ifndef TIME_T_MIN
  32 #define TIME_T_MIN ((time_t)0 < (time_t) -1 ? (time_t) 0 \
  33                     : ~ (time_t) 0 << (sizeof (time_t) * CHAR_BIT - 1))
  34 #endif
  35 #ifndef TIME_T_MAX
  36 #define TIME_T_MAX (~ (time_t) 0 - TIME_T_MIN)
  37 #endif
  38
  39 #define NTTIME_INFINITY (NTTIME)0x8000000000000000LL
  40
  41 #if (SIZEOF_LONG == 8)
  42 #define TIME_FIXUP_CONSTANT_INT 11644473600L
  43 #elif (SIZEOF_LONG_LONG == 8)
  44 #define TIME_FIXUP_CONSTANT_INT 11644473600LL
  45 #endif
  46
  47 /*******************************************************************
  48   create a 16 bit dos packed date
  49 ********************************************************************/
  50 static uint16_t make_dos_date1(struct tm *t)
  51 {
  52         uint16_t ret=0;
  53         ret = (((unsigned int)(t->tm_mon+1)) >> 3) | ((t->tm_year-80) << 1);
  54         ret = ((ret&0xFF)<<8) | (t->tm_mday | (((t->tm_mon+1) & 0x7) << 5));
  55         return ret;
  56 }
  57
  58 /*******************************************************************
  59   create a 16 bit dos packed time
  60 ********************************************************************/
  61 static uint16_t make_dos_time1(struct tm *t)
  62 {
  63         uint16_t ret=0;
  64         ret = ((((unsigned int)t->tm_min >> 3)&0x7) | (((unsigned int)t->tm_hour) << 3));
  65         ret = ((ret&0xFF)<<8) | ((t->tm_sec/2) | ((t->tm_min & 0x7) << 5));
  66         return ret;
  67 }
  68
  69 /*******************************************************************
  70   create a 32 bit dos packed date/time from some parameters
  71   This takes a GMT time and returns a packed localtime structure
  72 ********************************************************************/
  73 static uint32_t make_dos_date(time_t unixdate, int zone_offset)
  74 {
  75         struct tm *t;
  76         uint32_t ret=0;
  77
  78         if (unixdate == 0) {
  79                 return 0;
  80         }
  81
  82         unixdate -= zone_offset;
  83
  84         t = gmtime(&unixdate);
  85         if (!t) {
  86                 return 0xFFFFFFFF;
  87         }
  88
  89         ret = make_dos_date1(t);
  90         ret = ((ret&0xFFFF)<<16) | make_dos_time1(t);
  91
  92         return ret;
  93 }
  94
  95 /**
  96   parse a nttime as a large integer in a string and return a NTTIME
  97 */
  98 NTTIME nttime_from_string(const char *s)
  99 {
 100         return strtoull(s, NULL, 0);
 101 }
 102
 103 /**************************************************************
 104  Handle conversions between time_t and uint32, taking care to
 105  preserve the "special" values.
 106 **************************************************************/
 107
 108 uint32_t convert_time_t_to_uint32(time_t t)
 109 {
 110 #if (defined(SIZEOF_TIME_T) && (SIZEOF_TIME_T == 8))
 111         /* time_t is 64-bit. */
 112         if (t == 0x8000000000000000LL) {
 113                 return 0x80000000;
 114         } else if (t == 0x7FFFFFFFFFFFFFFFLL) {
 115                 return 0x7FFFFFFF;
 116         }
 117 #endif
 118         return (uint32_t)t;
 119 }
 120
 121 time_t convert_uint32_to_time_t(uint32_t u)
 122 {
 123 #if (defined(SIZEOF_TIME_T) && (SIZEOF_TIME_T == 8))
 124         /* time_t is 64-bit. */
 125         if (u == 0x80000000) {
 126                 return (time_t)0x8000000000000000LL;
 127         } else if (u == 0x7FFFFFFF) {
 128                 return (time_t)0x7FFFFFFFFFFFFFFFLL;
 129         }
 130 #endif
 131         return (time_t)u;
 132 }
 133
 134 /****************************************************************************
 135  Check if NTTIME is 0.
 136 ****************************************************************************/
 137
 138 bool nt_time_is_zero(const NTTIME *nt)
 139 {
 140         return (*nt == 0);
 141 }
 142
 143 /****************************************************************************
 144  Convert ASN.1 GeneralizedTime string to unix-time.
 145  Returns 0 on failure; Currently ignores timezone.
 146 ****************************************************************************/
 147
 148 time_t generalized_to_unix_time(const char *str)
 149 {
 150         struct tm tm;
 151
 152         ZERO_STRUCT(tm);
 153
 154         if (sscanf(str, "%4d%2d%2d%2d%2d%2d",
 155                    &tm.tm_year, &tm.tm_mon, &tm.tm_mday,
 156                    &tm.tm_hour, &tm.tm_min, &tm.tm_sec) != 6) {
 157                 return 0;
 158         }
 159         tm.tm_year -= 1900;
 160         tm.tm_mon -= 1;
 161
 162         return timegm(&tm);
 163 }
 164
 165 /*******************************************************************
 166  Accessor function for the server time zone offset.
 167  set_server_zone_offset() must have been called first.
 168 ******************************************************************/
 169
 170 static int server_zone_offset;
 171
 172 int get_server_zone_offset(void)
 173 {
 174         return server_zone_offset;
 175 }
 176
 177 /*******************************************************************
 178  Initialize the server time zone offset. Called when a client connects.
 179 ******************************************************************/
 180
 181 int set_server_zone_offset(time_t t)
 182 {
 183         server_zone_offset = get_time_zone(t);
 184         return server_zone_offset;
 185 }
 186
 187 /****************************************************************************
 188  Return the date and time as a string
 189 ****************************************************************************/
 190
 191 char *timeval_string(TALLOC_CTX *ctx, const struct timeval *tp, bool hires)
 192 {
 193         fstring TimeBuf;
 194         time_t t;
 195         struct tm *tm;
 196
 197         t = (time_t)tp->tv_sec;
 198         tm = localtime(&t);
 199         if (!tm) {
 200                 if (hires) {
 201                         slprintf(TimeBuf,
 202                                  sizeof(TimeBuf)-1,
 203                                  "%ld.%06ld seconds since the Epoch",
 204                                  (long)tp->tv_sec,
 205                                  (long)tp->tv_usec);
 206                 } else {
 207                         slprintf(TimeBuf,
 208                                  sizeof(TimeBuf)-1,
 209                                  "%ld seconds since the Epoch",
 210                                  (long)t);
 211                 }
 212         } else {
 213 #ifdef HAVE_STRFTIME
 214                 if (hires) {
 215                         strftime(TimeBuf,sizeof(TimeBuf)-1,"%Y/%m/%d %H:%M:%S",tm);
 216                         slprintf(TimeBuf+strlen(TimeBuf),
 217                                  sizeof(TimeBuf)-1 - strlen(TimeBuf),
 218                                  ".%06ld",
 219                                  (long)tp->tv_usec);
 220                 } else {
 221                         strftime(TimeBuf,sizeof(TimeBuf)-1,"%Y/%m/%d %H:%M:%S",tm);
 222                 }
 223 #else
 224                 if (hires) {
 225                         const char *asct = asctime(tm);
 226                         slprintf(TimeBuf,
 227                                  sizeof(TimeBuf)-1,
 228                                  "%s.%06ld",
 229                                  asct ? asct : "unknown",
 230                                  (long)tp->tv_usec);
 231                 } else {
 232                         const char *asct = asctime(tm);
 233                         fstrcpy(TimeBuf, asct ? asct : "unknown");
 234                 }
 235 #endif
 236         }
 237         return talloc_strdup(ctx, TimeBuf);
 238 }
 239
 240 char *current_timestring(TALLOC_CTX *ctx, bool hires)
 241 {
 242         struct timeval tv;
 243
 244         GetTimeOfDay(&tv);
 245         return timeval_string(ctx, &tv, hires);
 246 }
 247
 248 /*******************************************************************
 249  Put a dos date into a buffer (time/date format).
 250  This takes GMT time and puts local time in the buffer.
 251 ********************************************************************/
 252
 253 static void put_dos_date(char *buf,int offset,time_t unixdate, int zone_offset)
 254 {
 255         uint32_t x = make_dos_date(unixdate, zone_offset);
 256         SIVAL(buf,offset,x);
 257 }
 258
 259 /*******************************************************************
 260  Put a dos date into a buffer (date/time format).
 261  This takes GMT time and puts local time in the buffer.
 262 ********************************************************************/
 263
 264 static void put_dos_date2(char *buf,int offset,time_t unixdate, int zone_offset)
 265 {
 266         uint32_t x = make_dos_date(unixdate, zone_offset);
 267         x = ((x&0xFFFF)<<16) | ((x&0xFFFF0000)>>16);
 268         SIVAL(buf,offset,x);
 269 }
 270
 271 /*******************************************************************
 272  Put a dos 32 bit "unix like" date into a buffer. This routine takes
 273  GMT and converts it to LOCAL time before putting it (most SMBs assume
 274  localtime for this sort of date)
 275 ********************************************************************/
 276
 277 static void put_dos_date3(char *buf,int offset,time_t unixdate, int zone_offset)
 278 {
 279         if (!null_mtime(unixdate)) {
 280                 unixdate -= zone_offset;
 281         }
 282         SIVAL(buf,offset,unixdate);
 283 }
 284
 285
 286 /***************************************************************************
 287  Server versions of the above functions.
 288 ***************************************************************************/
 289
 290 void srv_put_dos_date(char *buf,int offset,time_t unixdate)
 291 {
 292         put_dos_date(buf, offset, unixdate, server_zone_offset);
 293 }
 294
 295 void srv_put_dos_date2(char *buf,int offset, time_t unixdate)
 296 {
 297         put_dos_date2(buf, offset, unixdate, server_zone_offset);
 298 }
 299
 300 void srv_put_dos_date3(char *buf,int offset,time_t unixdate)
 301 {
 302         put_dos_date3(buf, offset, unixdate, server_zone_offset);
 303 }
 304
 305 void round_timespec(enum timestamp_set_resolution res, struct timespec *ts)
 306 {
 307         switch (res) {
 308                 case TIMESTAMP_SET_SECONDS:
 309                         round_timespec_to_sec(ts);
 310                         break;
 311                 case TIMESTAMP_SET_MSEC:
 312                         round_timespec_to_usec(ts);
 313                         break;
 314                 case TIMESTAMP_SET_NT_OR_BETTER:
 315                         /* No rounding needed. */
 316                         break;
 317         }
 318 }
 319
 320 /****************************************************************************
 321  Take a Unix time and convert to an NTTIME structure and place in buffer
 322  pointed to by p, rounded to the correct resolution.
 323 ****************************************************************************/
 324
 325 void put_long_date_timespec(enum timestamp_set_resolution res, char *p, struct timespec ts)
 326 {
 327         NTTIME nt;
 328         round_timespec(res, &ts);
 329         unix_timespec_to_nt_time(&nt, ts);
 330         SIVAL(p, 0, nt & 0xFFFFFFFF);
 331         SIVAL(p, 4, nt >> 32);
 332 }
 333
 334 void put_long_date(char *p, time_t t)
 335 {
 336         struct timespec ts;
 337         ts.tv_sec = t;
 338         ts.tv_nsec = 0;
 339         put_long_date_timespec(TIMESTAMP_SET_SECONDS, p, ts);
 340 }
 341
 342 void dos_filetime_timespec(struct timespec *tsp)
 343 {
 344         tsp->tv_sec &= ~1;
 345         tsp->tv_nsec = 0;
 346 }
 347
 348 /*******************************************************************
 349  Create a unix date (int GMT) from a dos date (which is actually in
 350  localtime).
 351 ********************************************************************/
 352
 353 static time_t make_unix_date(const void *date_ptr, int zone_offset)
 354 {
 355         uint32_t dos_date=0;
 356         struct tm t;
 357         time_t ret;
 358
 359         dos_date = IVAL(date_ptr,0);
 360
 361         if (dos_date == 0) {
 362                 return 0;
 363         }
 364
 365         interpret_dos_date(dos_date,&t.tm_year,&t.tm_mon,
 366                         &t.tm_mday,&t.tm_hour,&t.tm_min,&t.tm_sec);
 367         t.tm_isdst = -1;
 368
 369         ret = timegm(&t);
 370
 371         ret += zone_offset;
 372
 373         return(ret);
 374 }
 375
 376 /*******************************************************************
 377  Like make_unix_date() but the words are reversed.
 378 ********************************************************************/
 379
 380 time_t make_unix_date2(const void *date_ptr, int zone_offset)
 381 {
 382         uint32_t x,x2;
 383
 384         x = IVAL(date_ptr,0);
 385         x2 = ((x&0xFFFF)<<16) | ((x&0xFFFF0000)>>16);
 386         SIVAL(&x,0,x2);
 387
 388         return(make_unix_date((const void *)&x, zone_offset));
 389 }
 390
 391 /*******************************************************************
 392  Create a unix GMT date from a dos date in 32 bit "unix like" format
 393  these generally arrive as localtimes, with corresponding DST.
 394 ******************************************************************/
 395
 396 time_t make_unix_date3(const void *date_ptr, int zone_offset)
 397 {
 398         time_t t = (time_t)IVAL(date_ptr,0);
 399         if (!null_mtime(t)) {
 400                 t += zone_offset;
 401         }
 402         return(t);
 403 }
 404
 405 time_t srv_make_unix_date(const void *date_ptr)
 406 {
 407         return make_unix_date(date_ptr, server_zone_offset);
 408 }
 409
 410 time_t srv_make_unix_date2(const void *date_ptr)
 411 {
 412         return make_unix_date2(date_ptr, server_zone_offset);
 413 }
 414
 415 time_t srv_make_unix_date3(const void *date_ptr)
 416 {
 417         return make_unix_date3(date_ptr, server_zone_offset);
 418 }
 419
 420 /****************************************************************************
 421  Convert a normalized timeval to a timespec.
 422 ****************************************************************************/
 423
 424 struct timespec convert_timeval_to_timespec(const struct timeval tv)
 425 {
 426         struct timespec ts;
 427         ts.tv_sec = tv.tv_sec;
 428         ts.tv_nsec = tv.tv_usec * 1000;
 429         return ts;
 430 }
 431
 432 /****************************************************************************
 433  Convert a normalized timespec to a timeval.
 434 ****************************************************************************/
 435
 436 struct timeval convert_timespec_to_timeval(const struct timespec ts)
 437 {
 438         struct timeval tv;
 439         tv.tv_sec = ts.tv_sec;
 440         tv.tv_usec = ts.tv_nsec / 1000;
 441         return tv;
 442 }
 443
 444 /****************************************************************************
 445  Return a timespec for the current time
 446 ****************************************************************************/
 447
 448 struct timespec timespec_current(void)
 449 {
 450         struct timeval tv;
 451         struct timespec ts;
 452         GetTimeOfDay(&tv);
 453         ts.tv_sec = tv.tv_sec;
 454         ts.tv_nsec = tv.tv_usec * 1000;
 455         return ts;
 456 }
 457
 458 /****************************************************************************
 459  Return the lesser of two timespecs.
 460 ****************************************************************************/
 461
 462 struct timespec timespec_min(const struct timespec *ts1,
 463                            const struct timespec *ts2)
 464 {
 465         if (ts1->tv_sec < ts2->tv_sec) return *ts1;
 466         if (ts1->tv_sec > ts2->tv_sec) return *ts2;
 467         if (ts1->tv_nsec < ts2->tv_nsec) return *ts1;
 468         return *ts2;
 469 }
 470
 471 /****************************************************************************
 472   compare two timespec structures.
 473   Return -1 if ts1 < ts2
 474   Return 0 if ts1 == ts2
 475   Return 1 if ts1 > ts2
 476 ****************************************************************************/
 477
 478 int timespec_compare(const struct timespec *ts1, const struct timespec *ts2)
 479 {
 480         if (ts1->tv_sec  > ts2->tv_sec)  return 1;
 481         if (ts1->tv_sec  < ts2->tv_sec)  return -1;
 482         if (ts1->tv_nsec > ts2->tv_nsec) return 1;
 483         if (ts1->tv_nsec < ts2->tv_nsec) return -1;
 484         return 0;
 485 }
 486
 487 /****************************************************************************
 488  Round up a timespec if nsec > 500000000, round down if lower,
 489  then zero nsec.
 490 ****************************************************************************/
 491
 492 void round_timespec_to_sec(struct timespec *ts)
 493 {
 494         ts->tv_sec = convert_timespec_to_time_t(*ts);
 495         ts->tv_nsec = 0;
 496 }
 497
 498 /****************************************************************************
 499  Round a timespec to usec value.
 500 ****************************************************************************/
 501
 502 void round_timespec_to_usec(struct timespec *ts)
 503 {
 504         struct timeval tv = convert_timespec_to_timeval(*ts);
 505         *ts = convert_timeval_to_timespec(tv);
 506 }
 507
 508 /****************************************************************************
 509  Interprets an nt time into a unix struct timespec.
 510  Differs from nt_time_to_unix in that an 8 byte value of 0xffffffffffffffff
 511  will be returned as (time_t)-1, whereas nt_time_to_unix returns 0 in this case.
 512 ****************************************************************************/
 513
 514 struct timespec interpret_long_date(const char *p)
 515 {
 516         NTTIME nt;
 517         nt = IVAL(p,0) + ((uint64_t)IVAL(p,4) << 32);
 518         if (nt == (uint64_t)-1) {
 519                 struct timespec ret;
 520                 ret.tv_sec = (time_t)-1;
 521                 ret.tv_nsec = 0;
 522                 return ret;
 523         }
 524         return nt_time_to_unix_timespec(&nt);
 525 }
 526
 527 /***************************************************************************
 528  Client versions of the above functions.
 529 ***************************************************************************/
 530
 531 void cli_put_dos_date(struct cli_state *cli, char *buf, int offset, time_t unixdate)
 532 {
 533         put_dos_date(buf, offset, unixdate, cli->serverzone);
 534 }
 535
 536 void cli_put_dos_date2(struct cli_state *cli, char *buf, int offset, time_t unixdate)
 537 {
 538         put_dos_date2(buf, offset, unixdate, cli->serverzone);
 539 }
 540
 541 void cli_put_dos_date3(struct cli_state *cli, char *buf, int offset, time_t unixdate)
 542 {
 543         put_dos_date3(buf, offset, unixdate, cli->serverzone);
 544 }
 545
 546 time_t cli_make_unix_date(struct cli_state *cli, const void *date_ptr)
 547 {
 548         return make_unix_date(date_ptr, cli->serverzone);
 549 }
 550
 551 time_t cli_make_unix_date2(struct cli_state *cli, const void *date_ptr)
 552 {
 553         return make_unix_date2(date_ptr, cli->serverzone);
 554 }
 555
 556 time_t cli_make_unix_date3(struct cli_state *cli, const void *date_ptr)
 557 {
 558         return make_unix_date3(date_ptr, cli->serverzone);
 559 }
 560
 561
 562 /*******************************************************************
 563  Re-read the smb serverzone value.
 564 ******************************************************************/
 565
 566 static struct timeval start_time_hires;
 567
 568 void TimeInit(void)
 569 {
 570         set_server_zone_offset(time(NULL));
 571
 572         DEBUG(4,("TimeInit: Serverzone is %d\n", server_zone_offset));
 573
 574         /* Save the start time of this process. */
 575         if (start_time_hires.tv_sec == 0 && start_time_hires.tv_usec == 0) {
 576                 GetTimeOfDay(&start_time_hires);
 577         }
 578 }
 579
 580 /**********************************************************************
 581  Return a timeval struct of the uptime of this process. As TimeInit is
 582  done before a daemon fork then this is the start time from the parent
 583  daemon start. JRA.
 584 ***********************************************************************/
 585
 586 void get_process_uptime(struct timeval *ret_time)
 587 {
 588         struct timeval time_now_hires;
 589
 590         GetTimeOfDay(&time_now_hires);
 591         ret_time->tv_sec = time_now_hires.tv_sec - start_time_hires.tv_sec;
 592         if (time_now_hires.tv_usec < start_time_hires.tv_usec) {
 593                 ret_time->tv_sec -= 1;
 594                 ret_time->tv_usec = 1000000 + (time_now_hires.tv_usec - start_time_hires.tv_usec);
 595         } else {
 596                 ret_time->tv_usec = time_now_hires.tv_usec - start_time_hires.tv_usec;
 597         }
 598 }
 599
 600 /****************************************************************************
 601  Convert a NTTIME structure to a time_t.
 602  It's originally in "100ns units".
 603
 604  This is an absolute version of the one above.
 605  By absolute I mean, it doesn't adjust from 1/1/1601 to 1/1/1970
 606  if the NTTIME was 5 seconds, the time_t is 5 seconds. JFM
 607 ****************************************************************************/
 608
 609 time_t nt_time_to_unix_abs(const NTTIME *nt)
 610 {
 611         uint64_t d;
 612
 613         if (*nt == 0) {
 614                 return (time_t)0;
 615         }
 616
 617         if (*nt == (uint64_t)-1) {
 618                 return (time_t)-1;
 619         }
 620
 621         if (*nt == NTTIME_INFINITY) {
 622                 return (time_t)-1;
 623         }
 624
 625         /* reverse the time */
 626         /* it's a negative value, turn it to positive */
 627         d=~*nt;
 628
 629         d += 1000*1000*10/2;
 630         d /= 1000*1000*10;
 631
 632         if (!(TIME_T_MIN <= ((time_t)d) && ((time_t)d) <= TIME_T_MAX)) {
 633                 return (time_t)0;
 634         }
 635
 636         return (time_t)d;
 637 }
 638
 639 time_t uint64s_nt_time_to_unix_abs(const uint64_t *src)
 640 {
 641         NTTIME nttime;
 642         nttime = *src;
 643         return nt_time_to_unix_abs(&nttime);
 644 }
 645
 646 /****************************************************************************
 647  Put a 8 byte filetime from a struct timespec. Uses GMT.
 648 ****************************************************************************/
 649
 650 void unix_timespec_to_nt_time(NTTIME *nt, struct timespec ts)
 651 {
 652         uint64_t d;
 653
 654         if (ts.tv_sec ==0 && ts.tv_nsec == 0) {
 655                 *nt = 0;
 656                 return;
 657         }
 658         if (ts.tv_sec == TIME_T_MAX) {
 659                 *nt = 0x7fffffffffffffffLL;
 660                 return;
 661         }
 662         if (ts.tv_sec == (time_t)-1) {
 663                 *nt = (uint64_t)-1;
 664                 return;
 665         }
 666
 667         d = ts.tv_sec;
 668         d += TIME_FIXUP_CONSTANT_INT;
 669         d *= 1000*1000*10;
 670         /* d is now in 100ns units. */
 671         d += (ts.tv_nsec / 100);
 672
 673         *nt = d;
 674 }
 675
 676 #if 0
 677 void nt_time_to_unix_timespec(struct timespec *ts, NTTIME t)
 678 {
 679         if (ts == NULL) {
 680                 return;
 681         }
 682
 683         /* t starts in 100 nsec units since 1601-01-01. */
 684
 685         t *= 100;
 686         /* t is now in nsec units since 1601-01-01. */
 687
 688         t -= TIME_FIXUP_CONSTANT*1000*1000*100;
 689         /* t is now in nsec units since the UNIX epoch 1970-01-01. */
 690
 691         ts->tv_sec  = t / 1000000000LL;
 692
 693         if (TIME_T_MIN > ts->tv_sec || ts->tv_sec > TIME_T_MAX) {
 694                 ts->tv_sec  = 0;
 695                 ts->tv_nsec = 0;
 696                 return;
 697         }
 698
 699         ts->tv_nsec = t - ts->tv_sec*1000000000LL;
 700 }
 701 #endif
 702
 703 /****************************************************************************
 704  Convert a time_t to a NTTIME structure
 705
 706  This is an absolute version of the one above.
 707  By absolute I mean, it doesn't adjust from 1/1/1970 to 1/1/1601
 708  If the time_t was 5 seconds, the NTTIME is 5 seconds. JFM
 709 ****************************************************************************/
 710
 711 void unix_to_nt_time_abs(NTTIME *nt, time_t t)
 712 {
 713         double d;
 714
 715         if (t==0) {
 716                 *nt = 0;
 717                 return;
 718         }
 719
 720         if (t == TIME_T_MAX) {
 721                 *nt = 0x7fffffffffffffffLL;
 722                 return;
 723         }
 724
 725         if (t == (time_t)-1) {
 726                 /* that's what NT uses for infinite */
 727                 *nt = NTTIME_INFINITY;
 728                 return;
 729         }
 730
 731         d = (double)(t);
 732         d *= 1.0e7;
 733
 734         *nt = (NTTIME)d;
 735
 736         /* convert to a negative value */
 737         *nt=~*nt;
 738 }
 739
 740
 741 /****************************************************************************
 742  Check if it's a null mtime.
 743 ****************************************************************************/
 744
 745 bool null_mtime(time_t mtime)
 746 {
 747         if (mtime == 0 || mtime == (time_t)0xFFFFFFFF || mtime == (time_t)-1)
 748                 return true;
 749         return false;
 750 }
 751
 752 /****************************************************************************
 753  Utility function that always returns a const string even if localtime
 754  and asctime fail.
 755 ****************************************************************************/
 756
 757 const char *time_to_asc(const time_t t)
 758 {
 759         const char *asct;
 760         struct tm *lt = localtime(&t);
 761
 762         if (!lt) {
 763                 return "unknown time";
 764         }
 765
 766         asct = asctime(lt);
 767         if (!asct) {
 768                 return "unknown time";
 769         }
 770         return asct;
 771 }
 772
 773 const char *display_time(NTTIME nttime)
 774 {
 775         float high;
 776         float low;
 777         int sec;
 778         int days, hours, mins, secs;
 779
 780         if (nttime==0)
 781                 return "Now";
 782
 783         if (nttime==NTTIME_INFINITY)
 784                 return "Never";
 785
 786         high = 65536;
 787         high = high/10000;
 788         high = high*65536;
 789         high = high/1000;
 790         high = high * (~(nttime >> 32));
 791
 792         low = ~(nttime & 0xFFFFFFFF);
 793         low = low/(1000*1000*10);
 794
 795         sec=(int)(high+low);
 796
 797         days=sec/(60*60*24);
 798         hours=(sec - (days*60*60*24)) / (60*60);
 799         mins=(sec - (days*60*60*24) - (hours*60*60) ) / 60;
 800         secs=sec - (days*60*60*24) - (hours*60*60) - (mins*60);
 801
 802         return talloc_asprintf(talloc_tos(), "%u days, %u hours, %u minutes, "
 803                                "%u seconds", days, hours, mins, secs);
 804 }
 805
 806 bool nt_time_is_set(const NTTIME *nt)
 807 {
 808         if (*nt == 0x7FFFFFFFFFFFFFFFLL) {
 809                 return false;
 810         }
 811
 812         if (*nt == NTTIME_INFINITY) {
 813                 return false;
 814         }
 815
 816         return true;
 817 }