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 *current_timestring(TALLOC_CTX *ctx, bool hires)
 192 {
 193         fstring TimeBuf;
 194         struct timeval tp;
 195         time_t t;
 196         struct tm *tm;
 197
 198         if (hires) {
 199                 GetTimeOfDay(&tp);
 200                 t = (time_t)tp.tv_sec;
 201         } else {
 202                 t = time(NULL);
 203         }
 204         tm = localtime(&t);
 205         if (!tm) {
 206                 if (hires) {
 207                         slprintf(TimeBuf,
 208                                  sizeof(TimeBuf)-1,
 209                                  "%ld.%06ld seconds since the Epoch",
 210                                  (long)tp.tv_sec,
 211                                  (long)tp.tv_usec);
 212                 } else {
 213                         slprintf(TimeBuf,
 214                                  sizeof(TimeBuf)-1,
 215                                  "%ld seconds since the Epoch",
 216                                  (long)t);
 217                 }
 218         } else {
 219 #ifdef HAVE_STRFTIME
 220                 if (hires) {
 221                         strftime(TimeBuf,sizeof(TimeBuf)-1,"%Y/%m/%d %H:%M:%S",tm);
 222                         slprintf(TimeBuf+strlen(TimeBuf),
 223                                  sizeof(TimeBuf)-1 - strlen(TimeBuf),
 224                                  ".%06ld",
 225                                  (long)tp.tv_usec);
 226                 } else {
 227                         strftime(TimeBuf,sizeof(TimeBuf)-1,"%Y/%m/%d %H:%M:%S",tm);
 228                 }
 229 #else
 230                 if (hires) {
 231                         const char *asct = asctime(tm);
 232                         slprintf(TimeBuf,
 233                                  sizeof(TimeBuf)-1,
 234                                  "%s.%06ld",
 235                                  asct ? asct : "unknown",
 236                                  (long)tp.tv_usec);
 237                 } else {
 238                         const char *asct = asctime(tm);
 239                         fstrcpy(TimeBuf, asct ? asct : "unknown");
 240                 }
 241 #endif
 242         }
 243         return talloc_strdup(ctx, TimeBuf);
 244 }
 245
 246
 247 /*******************************************************************
 248  Put a dos date into a buffer (time/date format).
 249  This takes GMT time and puts local time in the buffer.
 250 ********************************************************************/
 251
 252 static void put_dos_date(char *buf,int offset,time_t unixdate, int zone_offset)
 253 {
 254         uint32_t x = make_dos_date(unixdate, zone_offset);
 255         SIVAL(buf,offset,x);
 256 }
 257
 258 /*******************************************************************
 259  Put a dos date into a buffer (date/time format).
 260  This takes GMT time and puts local time in the buffer.
 261 ********************************************************************/
 262
 263 static void put_dos_date2(char *buf,int offset,time_t unixdate, int zone_offset)
 264 {
 265         uint32_t x = make_dos_date(unixdate, zone_offset);
 266         x = ((x&0xFFFF)<<16) | ((x&0xFFFF0000)>>16);
 267         SIVAL(buf,offset,x);
 268 }
 269
 270 /*******************************************************************
 271  Put a dos 32 bit "unix like" date into a buffer. This routine takes
 272  GMT and converts it to LOCAL time before putting it (most SMBs assume
 273  localtime for this sort of date)
 274 ********************************************************************/
 275
 276 static void put_dos_date3(char *buf,int offset,time_t unixdate, int zone_offset)
 277 {
 278         if (!null_mtime(unixdate)) {
 279                 unixdate -= zone_offset;
 280         }
 281         SIVAL(buf,offset,unixdate);
 282 }
 283
 284
 285 /***************************************************************************
 286  Server versions of the above functions.
 287 ***************************************************************************/
 288
 289 void srv_put_dos_date(char *buf,int offset,time_t unixdate)
 290 {
 291         put_dos_date(buf, offset, unixdate, server_zone_offset);
 292 }
 293
 294 void srv_put_dos_date2(char *buf,int offset, time_t unixdate)
 295 {
 296         put_dos_date2(buf, offset, unixdate, server_zone_offset);
 297 }
 298
 299 void srv_put_dos_date3(char *buf,int offset,time_t unixdate)
 300 {
 301         put_dos_date3(buf, offset, unixdate, server_zone_offset);
 302 }
 303
 304 /****************************************************************************
 305  Take a Unix time and convert to an NTTIME structure and place in buffer
 306  pointed to by p.
 307 ****************************************************************************/
 308
 309 void put_long_date_timespec(char *p, struct timespec ts)
 310 {
 311         NTTIME nt;
 312         unix_timespec_to_nt_time(&nt, ts);
 313         SIVAL(p, 0, nt & 0xFFFFFFFF);
 314         SIVAL(p, 4, nt >> 32);
 315 }
 316
 317 void put_long_date(char *p, time_t t)
 318 {
 319         struct timespec ts;
 320         ts.tv_sec = t;
 321         ts.tv_nsec = 0;
 322         put_long_date_timespec(p, ts);
 323 }
 324
 325 /****************************************************************************
 326  Return the best approximation to a 'create time' under UNIX from a stat
 327  structure.
 328 ****************************************************************************/
 329
 330 static time_t calc_create_time(const SMB_STRUCT_STAT *st)
 331 {
 332         time_t ret, ret1;
 333
 334         ret = MIN(st->st_ctime, st->st_mtime);
 335         ret1 = MIN(ret, st->st_atime);
 336
 337         if(ret1 != (time_t)0) {
 338                 return ret1;
 339         }
 340
 341         /*
 342          * One of ctime, mtime or atime was zero (probably atime).
 343          * Just return MIN(ctime, mtime).
 344          */
 345         return ret;
 346 }
 347
 348 /****************************************************************************
 349  Return the 'create time' from a stat struct if it exists (birthtime) or else
 350  use the best approximation.
 351 ****************************************************************************/
 352
 353 struct timespec get_create_timespec(const SMB_STRUCT_STAT *pst,bool fake_dirs)
 354 {
 355         struct timespec ret;
 356
 357         if(S_ISDIR(pst->st_mode) && fake_dirs) {
 358                 ret.tv_sec = 315493200L;          /* 1/1/1980 */
 359                 ret.tv_nsec = 0;
 360                 return ret;
 361         }
 362
 363 #if defined(HAVE_STAT_ST_BIRTHTIMESPEC)
 364         ret = pst->st_birthtimespec;
 365 #elif defined(HAVE_STAT_ST_BIRTHTIMENSEC)
 366         ret.tv_sec = pst->st_birthtime;
 367         ret.tv_nsec = pst->st_birthtimenspec;
 368 #elif defined(HAVE_STAT_ST_BIRTHTIME)
 369         ret.tv_sec = pst->st_birthtime;
 370         ret.tv_nsec = 0;
 371 #else
 372         ret.tv_sec = calc_create_time(pst);
 373         ret.tv_nsec = 0;
 374 #endif
 375
 376         /* Deal with systems that don't initialize birthtime correctly.
 377          * Pointed out by SATOH Fumiyasu <fumiyas@osstech.jp>.
 378          */
 379         if (null_timespec(ret)) {
 380                 ret.tv_sec = calc_create_time(pst);
 381                 ret.tv_nsec = 0;
 382         }
 383         return ret;
 384 }
 385
 386 /****************************************************************************
 387  Get/Set all the possible time fields from a stat struct as a timespec.
 388 ****************************************************************************/
 389
 390 struct timespec get_atimespec(const SMB_STRUCT_STAT *pst)
 391 {
 392 #if !defined(HAVE_STAT_HIRES_TIMESTAMPS)
 393         struct timespec ret;
 394
 395         /* Old system - no ns timestamp. */
 396         ret.tv_sec = pst->st_atime;
 397         ret.tv_nsec = 0;
 398         return ret;
 399 #else
 400 #if defined(HAVE_STAT_ST_ATIM)
 401         return pst->st_atim;
 402 #elif defined(HAVE_STAT_ST_ATIMENSEC)
 403         struct timespec ret;
 404         ret.tv_sec = pst->st_atime;
 405         ret.tv_nsec = pst->st_atimensec;
 406         return ret;
 407 #elif defined(HAVE_STAT_ST_ATIMESPEC)
 408         return pst->st_atimespec;
 409 #else
 410 #error  CONFIGURE_ERROR_IN_DETECTING_TIMESPEC_IN_STAT
 411 #endif
 412 #endif
 413 }
 414
 415 void set_atimespec(SMB_STRUCT_STAT *pst, struct timespec ts)
 416 {
 417 #if !defined(HAVE_STAT_HIRES_TIMESTAMPS)
 418         /* Old system - no ns timestamp. */
 419         pst->st_atime = ts.tv_sec;
 420 #else
 421 #if defined(HAVE_STAT_ST_ATIM)
 422         pst->st_atim = ts;
 423 #elif defined(HAVE_STAT_ST_ATIMENSEC)
 424         pst->st_atime = ts.tv_sec;
 425         pst->st_atimensec = ts.tv_nsec
 426 #elif defined(HAVE_STAT_ST_ATIMESPEC)
 427         pst->st_atimespec = ts;
 428 #else
 429 #error  CONFIGURE_ERROR_IN_DETECTING_TIMESPEC_IN_STAT
 430 #endif
 431 #endif
 432 }
 433
 434 struct timespec get_mtimespec(const SMB_STRUCT_STAT *pst)
 435 {
 436 #if !defined(HAVE_STAT_HIRES_TIMESTAMPS)
 437         struct timespec ret;
 438
 439         /* Old system - no ns timestamp. */
 440         ret.tv_sec = pst->st_mtime;
 441         ret.tv_nsec = 0;
 442         return ret;
 443 #else
 444 #if defined(HAVE_STAT_ST_MTIM)
 445         return pst->st_mtim;
 446 #elif defined(HAVE_STAT_ST_MTIMENSEC)
 447         struct timespec ret;
 448         ret.tv_sec = pst->st_mtime;
 449         ret.tv_nsec = pst->st_mtimensec;
 450         return ret;
 451 #elif defined(HAVE_STAT_ST_MTIMESPEC)
 452         return pst->st_mtimespec;
 453 #else
 454 #error  CONFIGURE_ERROR_IN_DETECTING_TIMESPEC_IN_STAT
 455 #endif
 456 #endif
 457 }
 458
 459 void set_mtimespec(SMB_STRUCT_STAT *pst, struct timespec ts)
 460 {
 461 #if !defined(HAVE_STAT_HIRES_TIMESTAMPS)
 462         /* Old system - no ns timestamp. */
 463         pst->st_mtime = ts.tv_sec;
 464 #else
 465 #if defined(HAVE_STAT_ST_MTIM)
 466         pst->st_mtim = ts;
 467 #elif defined(HAVE_STAT_ST_MTIMENSEC)
 468         pst->st_mtime = ts.tv_sec;
 469         pst->st_mtimensec = ts.tv_nsec
 470 #elif defined(HAVE_STAT_ST_ATIMESPEC)
 471         pst->st_atimespec = ts;
 472 #else
 473 #error  CONFIGURE_ERROR_IN_DETECTING_TIMESPEC_IN_STAT
 474 #endif
 475 #endif
 476 }
 477
 478 struct timespec get_ctimespec(const SMB_STRUCT_STAT *pst)
 479 {
 480 #if !defined(HAVE_STAT_HIRES_TIMESTAMPS)
 481         struct timespec ret;
 482
 483         /* Old system - no ns timestamp. */
 484         ret.tv_sec = pst->st_ctime;
 485         ret.tv_nsec = 0;
 486         return ret;
 487 #else
 488 #if defined(HAVE_STAT_ST_CTIM)
 489         return pst->st_ctim;
 490 #elif defined(HAVE_STAT_ST_CTIMENSEC)
 491         struct timespec ret;
 492         ret.tv_sec = pst->st_ctime;
 493         ret.tv_nsec = pst->st_ctimensec;
 494         return ret;
 495 #elif defined(HAVE_STAT_ST_CTIMESPEC)
 496         return pst->st_ctimespec;
 497 #else
 498 #error  CONFIGURE_ERROR_IN_DETECTING_TIMESPEC_IN_STAT
 499 #endif
 500 #endif
 501 }
 502
 503 void set_ctimespec(SMB_STRUCT_STAT *pst, struct timespec ts)
 504 {
 505 #if !defined(HAVE_STAT_HIRES_TIMESTAMPS)
 506         /* Old system - no ns timestamp. */
 507         pst->st_ctime = ts.tv_sec;
 508 #else
 509 #if defined(HAVE_STAT_ST_CTIM)
 510         pst->st_ctim = ts;
 511 #elif defined(HAVE_STAT_ST_CTIMENSEC)
 512         pst->st_ctime = ts.tv_sec;
 513         pst->st_ctimensec = ts.tv_nsec
 514 #elif defined(HAVE_STAT_ST_CTIMESPEC)
 515         pst->st_ctimespec = ts;
 516 #else
 517 #error  CONFIGURE_ERROR_IN_DETECTING_TIMESPEC_IN_STAT
 518 #endif
 519 #endif
 520 }
 521
 522 void dos_filetime_timespec(struct timespec *tsp)
 523 {
 524         tsp->tv_sec &= ~1;
 525         tsp->tv_nsec = 0;
 526 }
 527
 528 /*******************************************************************
 529  Create a unix date (int GMT) from a dos date (which is actually in
 530  localtime).
 531 ********************************************************************/
 532
 533 static time_t make_unix_date(const void *date_ptr, int zone_offset)
 534 {
 535         uint32_t dos_date=0;
 536         struct tm t;
 537         time_t ret;
 538
 539         dos_date = IVAL(date_ptr,0);
 540
 541         if (dos_date == 0) {
 542                 return 0;
 543         }
 544
 545         interpret_dos_date(dos_date,&t.tm_year,&t.tm_mon,
 546                         &t.tm_mday,&t.tm_hour,&t.tm_min,&t.tm_sec);
 547         t.tm_isdst = -1;
 548
 549         ret = timegm(&t);
 550
 551         ret += zone_offset;
 552
 553         return(ret);
 554 }
 555
 556 /*******************************************************************
 557  Like make_unix_date() but the words are reversed.
 558 ********************************************************************/
 559
 560 static time_t make_unix_date2(const void *date_ptr, int zone_offset)
 561 {
 562         uint32_t x,x2;
 563
 564         x = IVAL(date_ptr,0);
 565         x2 = ((x&0xFFFF)<<16) | ((x&0xFFFF0000)>>16);
 566         SIVAL(&x,0,x2);
 567
 568         return(make_unix_date((const void *)&x, zone_offset));
 569 }
 570
 571 /*******************************************************************
 572  Create a unix GMT date from a dos date in 32 bit "unix like" format
 573  these generally arrive as localtimes, with corresponding DST.
 574 ******************************************************************/
 575
 576 static time_t make_unix_date3(const void *date_ptr, int zone_offset)
 577 {
 578         time_t t = (time_t)IVAL(date_ptr,0);
 579         if (!null_mtime(t)) {
 580                 t += zone_offset;
 581         }
 582         return(t);
 583 }
 584
 585 time_t srv_make_unix_date(const void *date_ptr)
 586 {
 587         return make_unix_date(date_ptr, server_zone_offset);
 588 }
 589
 590 time_t srv_make_unix_date2(const void *date_ptr)
 591 {
 592         return make_unix_date2(date_ptr, server_zone_offset);
 593 }
 594
 595 time_t srv_make_unix_date3(const void *date_ptr)
 596 {
 597         return make_unix_date3(date_ptr, server_zone_offset);
 598 }
 599
 600 /****************************************************************************
 601  Convert a normalized timeval to a timespec.
 602 ****************************************************************************/
 603
 604 struct timespec convert_timeval_to_timespec(const struct timeval tv)
 605 {
 606         struct timespec ts;
 607         ts.tv_sec = tv.tv_sec;
 608         ts.tv_nsec = tv.tv_usec * 1000;
 609         return ts;
 610 }
 611
 612 /****************************************************************************
 613  Convert a normalized timespec to a timeval.
 614 ****************************************************************************/
 615
 616 struct timeval convert_timespec_to_timeval(const struct timespec ts)
 617 {
 618         struct timeval tv;
 619         tv.tv_sec = ts.tv_sec;
 620         tv.tv_usec = ts.tv_nsec / 1000;
 621         return tv;
 622 }
 623
 624 /****************************************************************************
 625  Return a timespec for the current time
 626 ****************************************************************************/
 627
 628 struct timespec timespec_current(void)
 629 {
 630         struct timeval tv;
 631         struct timespec ts;
 632         GetTimeOfDay(&tv);
 633         ts.tv_sec = tv.tv_sec;
 634         ts.tv_nsec = tv.tv_usec * 1000;
 635         return ts;
 636 }
 637
 638 /****************************************************************************
 639  Return the lesser of two timespecs.
 640 ****************************************************************************/
 641
 642 struct timespec timespec_min(const struct timespec *ts1,
 643                            const struct timespec *ts2)
 644 {
 645         if (ts1->tv_sec < ts2->tv_sec) return *ts1;
 646         if (ts1->tv_sec > ts2->tv_sec) return *ts2;
 647         if (ts1->tv_nsec < ts2->tv_nsec) return *ts1;
 648         return *ts2;
 649 }
 650
 651 /****************************************************************************
 652   compare two timespec structures.
 653   Return -1 if ts1 < ts2
 654   Return 0 if ts1 == ts2
 655   Return 1 if ts1 > ts2
 656 ****************************************************************************/
 657
 658 int timespec_compare(const struct timespec *ts1, const struct timespec *ts2)
 659 {
 660         if (ts1->tv_sec  > ts2->tv_sec)  return 1;
 661         if (ts1->tv_sec  < ts2->tv_sec)  return -1;
 662         if (ts1->tv_nsec > ts2->tv_nsec) return 1;
 663         if (ts1->tv_nsec < ts2->tv_nsec) return -1;
 664         return 0;
 665 }
 666
 667 /****************************************************************************
 668  Interprets an nt time into a unix struct timespec.
 669  Differs from nt_time_to_unix in that an 8 byte value of 0xffffffffffffffff
 670  will be returned as (time_t)-1, whereas nt_time_to_unix returns 0 in this case.
 671 ****************************************************************************/
 672
 673 struct timespec interpret_long_date(const char *p)
 674 {
 675         NTTIME nt;
 676         nt = IVAL(p,0) + ((uint64_t)IVAL(p,4) << 32);
 677         if (nt == (uint64_t)-1) {
 678                 struct timespec ret;
 679                 ret.tv_sec = (time_t)-1;
 680                 ret.tv_nsec = 0;
 681                 return ret;
 682         }
 683         return nt_time_to_unix_timespec(&nt);
 684 }
 685
 686 /***************************************************************************
 687  Client versions of the above functions.
 688 ***************************************************************************/
 689
 690 void cli_put_dos_date(struct cli_state *cli, char *buf, int offset, time_t unixdate)
 691 {
 692         put_dos_date(buf, offset, unixdate, cli->serverzone);
 693 }
 694
 695 void cli_put_dos_date2(struct cli_state *cli, char *buf, int offset, time_t unixdate)
 696 {
 697         put_dos_date2(buf, offset, unixdate, cli->serverzone);
 698 }
 699
 700 void cli_put_dos_date3(struct cli_state *cli, char *buf, int offset, time_t unixdate)
 701 {
 702         put_dos_date3(buf, offset, unixdate, cli->serverzone);
 703 }
 704
 705 time_t cli_make_unix_date(struct cli_state *cli, const void *date_ptr)
 706 {
 707         return make_unix_date(date_ptr, cli->serverzone);
 708 }
 709
 710 time_t cli_make_unix_date2(struct cli_state *cli, const void *date_ptr)
 711 {
 712         return make_unix_date2(date_ptr, cli->serverzone);
 713 }
 714
 715 time_t cli_make_unix_date3(struct cli_state *cli, const void *date_ptr)
 716 {
 717         return make_unix_date3(date_ptr, cli->serverzone);
 718 }
 719
 720 /****************************************************************************
 721  Check if two NTTIMEs are the same.
 722 ****************************************************************************/
 723
 724 bool nt_time_equals(const NTTIME *nt1, const NTTIME *nt2)
 725 {
 726         return (*nt1 == *nt2);
 727 }
 728
 729 /*******************************************************************
 730  Re-read the smb serverzone value.
 731 ******************************************************************/
 732
 733 static struct timeval start_time_hires;
 734
 735 void TimeInit(void)
 736 {
 737         set_server_zone_offset(time(NULL));
 738
 739         DEBUG(4,("TimeInit: Serverzone is %d\n", server_zone_offset));
 740
 741         /* Save the start time of this process. */
 742         if (start_time_hires.tv_sec == 0 && start_time_hires.tv_usec == 0) {
 743                 GetTimeOfDay(&start_time_hires);
 744         }
 745 }
 746
 747 /**********************************************************************
 748  Return a timeval struct of the uptime of this process. As TimeInit is
 749  done before a daemon fork then this is the start time from the parent
 750  daemon start. JRA.
 751 ***********************************************************************/
 752
 753 void get_process_uptime(struct timeval *ret_time)
 754 {
 755         struct timeval time_now_hires;
 756
 757         GetTimeOfDay(&time_now_hires);
 758         ret_time->tv_sec = time_now_hires.tv_sec - start_time_hires.tv_sec;
 759         if (time_now_hires.tv_usec < start_time_hires.tv_usec) {
 760                 ret_time->tv_sec -= 1;
 761                 ret_time->tv_usec = 1000000 + (time_now_hires.tv_usec - start_time_hires.tv_usec);
 762         } else {
 763                 ret_time->tv_usec = time_now_hires.tv_usec - start_time_hires.tv_usec;
 764         }
 765 }
 766
 767 /****************************************************************************
 768  Convert a NTTIME structure to a time_t.
 769  It's originally in "100ns units".
 770
 771  This is an absolute version of the one above.
 772  By absolute I mean, it doesn't adjust from 1/1/1601 to 1/1/1970
 773  if the NTTIME was 5 seconds, the time_t is 5 seconds. JFM
 774 ****************************************************************************/
 775
 776 time_t nt_time_to_unix_abs(const NTTIME *nt)
 777 {
 778         uint64_t d;
 779
 780         if (*nt == 0) {
 781                 return (time_t)0;
 782         }
 783
 784         if (*nt == (uint64_t)-1) {
 785                 return (time_t)-1;
 786         }
 787
 788         if (*nt == NTTIME_INFINITY) {
 789                 return (time_t)-1;
 790         }
 791
 792         /* reverse the time */
 793         /* it's a negative value, turn it to positive */
 794         d=~*nt;
 795
 796         d += 1000*1000*10/2;
 797         d /= 1000*1000*10;
 798
 799         if (!(TIME_T_MIN <= ((time_t)d) && ((time_t)d) <= TIME_T_MAX)) {
 800                 return (time_t)0;
 801         }
 802
 803         return (time_t)d;
 804 }
 805
 806 time_t uint64s_nt_time_to_unix_abs(const uint64_t *src)
 807 {
 808         NTTIME nttime;
 809         nttime = *src;
 810         return nt_time_to_unix_abs(&nttime);
 811 }
 812
 813 /****************************************************************************
 814  Put a 8 byte filetime from a struct timespec. Uses GMT.
 815 ****************************************************************************/
 816
 817 void unix_timespec_to_nt_time(NTTIME *nt, struct timespec ts)
 818 {
 819         uint64_t d;
 820
 821         if (ts.tv_sec ==0 && ts.tv_nsec == 0) {
 822                 *nt = 0;
 823                 return;
 824         }
 825         if (ts.tv_sec == TIME_T_MAX) {
 826                 *nt = 0x7fffffffffffffffLL;
 827                 return;
 828         }
 829         if (ts.tv_sec == (time_t)-1) {
 830                 *nt = (uint64_t)-1;
 831                 return;
 832         }
 833
 834         d = ts.tv_sec;
 835         d += TIME_FIXUP_CONSTANT_INT;
 836         d *= 1000*1000*10;
 837         /* d is now in 100ns units. */
 838         d += (ts.tv_nsec / 100);
 839
 840         *nt = d;
 841 }
 842
 843 /****************************************************************************
 844  Convert a time_t to a NTTIME structure
 845
 846  This is an absolute version of the one above.
 847  By absolute I mean, it doesn't adjust from 1/1/1970 to 1/1/1601
 848  If the time_t was 5 seconds, the NTTIME is 5 seconds. JFM
 849 ****************************************************************************/
 850
 851 void unix_to_nt_time_abs(NTTIME *nt, time_t t)
 852 {
 853         double d;
 854
 855         if (t==0) {
 856                 *nt = 0;
 857                 return;
 858         }
 859
 860         if (t == TIME_T_MAX) {
 861                 *nt = 0x7fffffffffffffffLL;
 862                 return;
 863         }
 864
 865         if (t == (time_t)-1) {
 866                 /* that's what NT uses for infinite */
 867                 *nt = NTTIME_INFINITY;
 868                 return;
 869         }
 870
 871         d = (double)(t);
 872         d *= 1.0e7;
 873
 874         *nt = (NTTIME)d;
 875
 876         /* convert to a negative value */
 877         *nt=~*nt;
 878 }
 879
 880
 881 /****************************************************************************
 882  Check if it's a null mtime.
 883 ****************************************************************************/
 884
 885 bool null_mtime(time_t mtime)
 886 {
 887         if (mtime == 0 || mtime == (time_t)0xFFFFFFFF || mtime == (time_t)-1)
 888                 return true;
 889         return false;
 890 }
 891
 892 /****************************************************************************
 893  Utility function that always returns a const string even if localtime
 894  and asctime fail.
 895 ****************************************************************************/
 896
 897 const char *time_to_asc(const time_t t)
 898 {
 899         const char *asct;
 900         struct tm *lt = localtime(&t);
 901
 902         if (!lt) {
 903                 return "unknown time";
 904         }
 905
 906         asct = asctime(lt);
 907         if (!asct) {
 908                 return "unknown time";
 909         }
 910         return asct;
 911 }
 912
 913 const char *display_time(NTTIME nttime)
 914 {
 915         float high;
 916         float low;
 917         int sec;
 918         int days, hours, mins, secs;
 919
 920         if (nttime==0)
 921                 return "Now";
 922
 923         if (nttime==NTTIME_INFINITY)
 924                 return "Never";
 925
 926         high = 65536;
 927         high = high/10000;
 928         high = high*65536;
 929         high = high/1000;
 930         high = high * (~(nttime >> 32));
 931
 932         low = ~(nttime & 0xFFFFFFFF);
 933         low = low/(1000*1000*10);
 934
 935         sec=(int)(high+low);
 936
 937         days=sec/(60*60*24);
 938         hours=(sec - (days*60*60*24)) / (60*60);
 939         mins=(sec - (days*60*60*24) - (hours*60*60) ) / 60;
 940         secs=sec - (days*60*60*24) - (hours*60*60) - (mins*60);
 941
 942         return talloc_asprintf(talloc_tos(), "%u days, %u hours, %u minutes, "
 943                                "%u seconds", days, hours, mins, secs);
 944 }
 945
 946 bool nt_time_is_set(const NTTIME *nt)
 947 {
 948         if (*nt == 0x7FFFFFFFFFFFFFFFLL) {
 949                 return false;
 950         }
 951
 952         if (*nt == NTTIME_INFINITY) {
 953                 return false;
 954         }
 955
 956         return true;
 957 }