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_ATIME_N)
 408         struct timespec ret;
 409         ret.tv_sec = pst->st_atime;
 410         ret.tv_nsec = pst->st_atime_n;
 411         return ret;
 412 #elif defined(HAVE_STAT_ST_ATIMESPEC)
 413         return pst->st_atimespec;
 414 #else
 415 #error  CONFIGURE_ERROR_IN_DETECTING_TIMESPEC_IN_STAT
 416 #endif
 417 #endif
 418 }
 419
 420 void set_atimespec(SMB_STRUCT_STAT *pst, struct timespec ts)
 421 {
 422 #if !defined(HAVE_STAT_HIRES_TIMESTAMPS)
 423         /* Old system - no ns timestamp. */
 424         pst->st_atime = ts.tv_sec;
 425 #else
 426 #if defined(HAVE_STAT_ST_ATIM)
 427         pst->st_atim = ts;
 428 #elif defined(HAVE_STAT_ST_ATIMENSEC)
 429         pst->st_atime = ts.tv_sec;
 430         pst->st_atimensec = ts.tv_nsec;
 431 #elif defined(HAVE_STAT_ST_ATIME_N)
 432         pst->st_atime = ts.tv_sec;
 433         pst->st_atime_n = ts.tv_nsec;
 434 #elif defined(HAVE_STAT_ST_ATIMESPEC)
 435         pst->st_atimespec = ts;
 436 #else
 437 #error  CONFIGURE_ERROR_IN_DETECTING_TIMESPEC_IN_STAT
 438 #endif
 439 #endif
 440 }
 441
 442 struct timespec get_mtimespec(const SMB_STRUCT_STAT *pst)
 443 {
 444 #if !defined(HAVE_STAT_HIRES_TIMESTAMPS)
 445         struct timespec ret;
 446
 447         /* Old system - no ns timestamp. */
 448         ret.tv_sec = pst->st_mtime;
 449         ret.tv_nsec = 0;
 450         return ret;
 451 #else
 452 #if defined(HAVE_STAT_ST_MTIM)
 453         return pst->st_mtim;
 454 #elif defined(HAVE_STAT_ST_MTIMENSEC)
 455         struct timespec ret;
 456         ret.tv_sec = pst->st_mtime;
 457         ret.tv_nsec = pst->st_mtimensec;
 458         return ret;
 459 #elif defined(HAVE_STAT_ST_MTIME_N)
 460         struct timespec ret;
 461         ret.tv_sec = pst->st_mtime;
 462         ret.tv_nsec = pst->st_mtime_n;
 463         return ret;
 464 #elif defined(HAVE_STAT_ST_MTIMESPEC)
 465         return pst->st_mtimespec;
 466 #else
 467 #error  CONFIGURE_ERROR_IN_DETECTING_TIMESPEC_IN_STAT
 468 #endif
 469 #endif
 470 }
 471
 472 void set_mtimespec(SMB_STRUCT_STAT *pst, struct timespec ts)
 473 {
 474 #if !defined(HAVE_STAT_HIRES_TIMESTAMPS)
 475         /* Old system - no ns timestamp. */
 476         pst->st_mtime = ts.tv_sec;
 477 #else
 478 #if defined(HAVE_STAT_ST_MTIM)
 479         pst->st_mtim = ts;
 480 #elif defined(HAVE_STAT_ST_MTIMENSEC)
 481         pst->st_mtime = ts.tv_sec;
 482         pst->st_mtimensec = ts.tv_nsec;
 483 #elif defined(HAVE_STAT_ST_MTIME_N)
 484         pst->st_mtime = ts.tv_sec;
 485         pst->st_mtime_n = ts.tv_nsec;
 486 #elif defined(HAVE_STAT_ST_MTIMESPEC)
 487         pst->st_mtimespec = ts;
 488 #else
 489 #error  CONFIGURE_ERROR_IN_DETECTING_TIMESPEC_IN_STAT
 490 #endif
 491 #endif
 492 }
 493
 494 struct timespec get_ctimespec(const SMB_STRUCT_STAT *pst)
 495 {
 496 #if !defined(HAVE_STAT_HIRES_TIMESTAMPS)
 497         struct timespec ret;
 498
 499         /* Old system - no ns timestamp. */
 500         ret.tv_sec = pst->st_ctime;
 501         ret.tv_nsec = 0;
 502         return ret;
 503 #else
 504 #if defined(HAVE_STAT_ST_CTIM)
 505         return pst->st_ctim;
 506 #elif defined(HAVE_STAT_ST_CTIMENSEC)
 507         struct timespec ret;
 508         ret.tv_sec = pst->st_ctime;
 509         ret.tv_nsec = pst->st_ctimensec;
 510         return ret;
 511 #elif defined(HAVE_STAT_ST_CTIME_N)
 512         struct timespec ret;
 513         ret.tv_sec = pst->st_ctime;
 514         ret.tv_nsec = pst->st_ctime_n;
 515         return ret;
 516 #elif defined(HAVE_STAT_ST_CTIMESPEC)
 517         return pst->st_ctimespec;
 518 #else
 519 #error  CONFIGURE_ERROR_IN_DETECTING_TIMESPEC_IN_STAT
 520 #endif
 521 #endif
 522 }
 523
 524 void set_ctimespec(SMB_STRUCT_STAT *pst, struct timespec ts)
 525 {
 526 #if !defined(HAVE_STAT_HIRES_TIMESTAMPS)
 527         /* Old system - no ns timestamp. */
 528         pst->st_ctime = ts.tv_sec;
 529 #else
 530 #if defined(HAVE_STAT_ST_CTIM)
 531         pst->st_ctim = ts;
 532 #elif defined(HAVE_STAT_ST_CTIMENSEC)
 533         pst->st_ctime = ts.tv_sec;
 534         pst->st_ctimensec = ts.tv_nsec;
 535 #elif defined(HAVE_STAT_ST_CTIME_N)
 536         pst->st_ctime = ts.tv_sec;
 537         pst->st_ctime_n = ts.tv_nsec;
 538 #elif defined(HAVE_STAT_ST_CTIMESPEC)
 539         pst->st_ctimespec = ts;
 540 #else
 541 #error  CONFIGURE_ERROR_IN_DETECTING_TIMESPEC_IN_STAT
 542 #endif
 543 #endif
 544 }
 545
 546 void dos_filetime_timespec(struct timespec *tsp)
 547 {
 548         tsp->tv_sec &= ~1;
 549         tsp->tv_nsec = 0;
 550 }
 551
 552 /*******************************************************************
 553  Create a unix date (int GMT) from a dos date (which is actually in
 554  localtime).
 555 ********************************************************************/
 556
 557 static time_t make_unix_date(const void *date_ptr, int zone_offset)
 558 {
 559         uint32_t dos_date=0;
 560         struct tm t;
 561         time_t ret;
 562
 563         dos_date = IVAL(date_ptr,0);
 564
 565         if (dos_date == 0) {
 566                 return 0;
 567         }
 568
 569         interpret_dos_date(dos_date,&t.tm_year,&t.tm_mon,
 570                         &t.tm_mday,&t.tm_hour,&t.tm_min,&t.tm_sec);
 571         t.tm_isdst = -1;
 572
 573         ret = timegm(&t);
 574
 575         ret += zone_offset;
 576
 577         return(ret);
 578 }
 579
 580 /*******************************************************************
 581  Like make_unix_date() but the words are reversed.
 582 ********************************************************************/
 583
 584 static time_t make_unix_date2(const void *date_ptr, int zone_offset)
 585 {
 586         uint32_t x,x2;
 587
 588         x = IVAL(date_ptr,0);
 589         x2 = ((x&0xFFFF)<<16) | ((x&0xFFFF0000)>>16);
 590         SIVAL(&x,0,x2);
 591
 592         return(make_unix_date((const void *)&x, zone_offset));
 593 }
 594
 595 /*******************************************************************
 596  Create a unix GMT date from a dos date in 32 bit "unix like" format
 597  these generally arrive as localtimes, with corresponding DST.
 598 ******************************************************************/
 599
 600 static time_t make_unix_date3(const void *date_ptr, int zone_offset)
 601 {
 602         time_t t = (time_t)IVAL(date_ptr,0);
 603         if (!null_mtime(t)) {
 604                 t += zone_offset;
 605         }
 606         return(t);
 607 }
 608
 609 time_t srv_make_unix_date(const void *date_ptr)
 610 {
 611         return make_unix_date(date_ptr, server_zone_offset);
 612 }
 613
 614 time_t srv_make_unix_date2(const void *date_ptr)
 615 {
 616         return make_unix_date2(date_ptr, server_zone_offset);
 617 }
 618
 619 time_t srv_make_unix_date3(const void *date_ptr)
 620 {
 621         return make_unix_date3(date_ptr, server_zone_offset);
 622 }
 623
 624 /****************************************************************************
 625  Convert a normalized timeval to a timespec.
 626 ****************************************************************************/
 627
 628 struct timespec convert_timeval_to_timespec(const struct timeval tv)
 629 {
 630         struct timespec ts;
 631         ts.tv_sec = tv.tv_sec;
 632         ts.tv_nsec = tv.tv_usec * 1000;
 633         return ts;
 634 }
 635
 636 /****************************************************************************
 637  Convert a normalized timespec to a timeval.
 638 ****************************************************************************/
 639
 640 struct timeval convert_timespec_to_timeval(const struct timespec ts)
 641 {
 642         struct timeval tv;
 643         tv.tv_sec = ts.tv_sec;
 644         tv.tv_usec = ts.tv_nsec / 1000;
 645         return tv;
 646 }
 647
 648 /****************************************************************************
 649  Return a timespec for the current time
 650 ****************************************************************************/
 651
 652 struct timespec timespec_current(void)
 653 {
 654         struct timeval tv;
 655         struct timespec ts;
 656         GetTimeOfDay(&tv);
 657         ts.tv_sec = tv.tv_sec;
 658         ts.tv_nsec = tv.tv_usec * 1000;
 659         return ts;
 660 }
 661
 662 /****************************************************************************
 663  Return the lesser of two timespecs.
 664 ****************************************************************************/
 665
 666 struct timespec timespec_min(const struct timespec *ts1,
 667                            const struct timespec *ts2)
 668 {
 669         if (ts1->tv_sec < ts2->tv_sec) return *ts1;
 670         if (ts1->tv_sec > ts2->tv_sec) return *ts2;
 671         if (ts1->tv_nsec < ts2->tv_nsec) return *ts1;
 672         return *ts2;
 673 }
 674
 675 /****************************************************************************
 676   compare two timespec structures.
 677   Return -1 if ts1 < ts2
 678   Return 0 if ts1 == ts2
 679   Return 1 if ts1 > ts2
 680 ****************************************************************************/
 681
 682 int timespec_compare(const struct timespec *ts1, const struct timespec *ts2)
 683 {
 684         if (ts1->tv_sec  > ts2->tv_sec)  return 1;
 685         if (ts1->tv_sec  < ts2->tv_sec)  return -1;
 686         if (ts1->tv_nsec > ts2->tv_nsec) return 1;
 687         if (ts1->tv_nsec < ts2->tv_nsec) return -1;
 688         return 0;
 689 }
 690
 691 /****************************************************************************
 692  Interprets an nt time into a unix struct timespec.
 693  Differs from nt_time_to_unix in that an 8 byte value of 0xffffffffffffffff
 694  will be returned as (time_t)-1, whereas nt_time_to_unix returns 0 in this case.
 695 ****************************************************************************/
 696
 697 struct timespec interpret_long_date(const char *p)
 698 {
 699         NTTIME nt;
 700         nt = IVAL(p,0) + ((uint64_t)IVAL(p,4) << 32);
 701         if (nt == (uint64_t)-1) {
 702                 struct timespec ret;
 703                 ret.tv_sec = (time_t)-1;
 704                 ret.tv_nsec = 0;
 705                 return ret;
 706         }
 707         return nt_time_to_unix_timespec(&nt);
 708 }
 709
 710 /***************************************************************************
 711  Client versions of the above functions.
 712 ***************************************************************************/
 713
 714 void cli_put_dos_date(struct cli_state *cli, char *buf, int offset, time_t unixdate)
 715 {
 716         put_dos_date(buf, offset, unixdate, cli->serverzone);
 717 }
 718
 719 void cli_put_dos_date2(struct cli_state *cli, char *buf, int offset, time_t unixdate)
 720 {
 721         put_dos_date2(buf, offset, unixdate, cli->serverzone);
 722 }
 723
 724 void cli_put_dos_date3(struct cli_state *cli, char *buf, int offset, time_t unixdate)
 725 {
 726         put_dos_date3(buf, offset, unixdate, cli->serverzone);
 727 }
 728
 729 time_t cli_make_unix_date(struct cli_state *cli, const void *date_ptr)
 730 {
 731         return make_unix_date(date_ptr, cli->serverzone);
 732 }
 733
 734 time_t cli_make_unix_date2(struct cli_state *cli, const void *date_ptr)
 735 {
 736         return make_unix_date2(date_ptr, cli->serverzone);
 737 }
 738
 739 time_t cli_make_unix_date3(struct cli_state *cli, const void *date_ptr)
 740 {
 741         return make_unix_date3(date_ptr, cli->serverzone);
 742 }
 743
 744 /****************************************************************************
 745  Check if two NTTIMEs are the same.
 746 ****************************************************************************/
 747
 748 bool nt_time_equals(const NTTIME *nt1, const NTTIME *nt2)
 749 {
 750         return (*nt1 == *nt2);
 751 }
 752
 753 /*******************************************************************
 754  Re-read the smb serverzone value.
 755 ******************************************************************/
 756
 757 static struct timeval start_time_hires;
 758
 759 void TimeInit(void)
 760 {
 761         set_server_zone_offset(time(NULL));
 762
 763         DEBUG(4,("TimeInit: Serverzone is %d\n", server_zone_offset));
 764
 765         /* Save the start time of this process. */
 766         if (start_time_hires.tv_sec == 0 && start_time_hires.tv_usec == 0) {
 767                 GetTimeOfDay(&start_time_hires);
 768         }
 769 }
 770
 771 /**********************************************************************
 772  Return a timeval struct of the uptime of this process. As TimeInit is
 773  done before a daemon fork then this is the start time from the parent
 774  daemon start. JRA.
 775 ***********************************************************************/
 776
 777 void get_process_uptime(struct timeval *ret_time)
 778 {
 779         struct timeval time_now_hires;
 780
 781         GetTimeOfDay(&time_now_hires);
 782         ret_time->tv_sec = time_now_hires.tv_sec - start_time_hires.tv_sec;
 783         if (time_now_hires.tv_usec < start_time_hires.tv_usec) {
 784                 ret_time->tv_sec -= 1;
 785                 ret_time->tv_usec = 1000000 + (time_now_hires.tv_usec - start_time_hires.tv_usec);
 786         } else {
 787                 ret_time->tv_usec = time_now_hires.tv_usec - start_time_hires.tv_usec;
 788         }
 789 }
 790
 791 /****************************************************************************
 792  Convert a NTTIME structure to a time_t.
 793  It's originally in "100ns units".
 794
 795  This is an absolute version of the one above.
 796  By absolute I mean, it doesn't adjust from 1/1/1601 to 1/1/1970
 797  if the NTTIME was 5 seconds, the time_t is 5 seconds. JFM
 798 ****************************************************************************/
 799
 800 time_t nt_time_to_unix_abs(const NTTIME *nt)
 801 {
 802         uint64_t d;
 803
 804         if (*nt == 0) {
 805                 return (time_t)0;
 806         }
 807
 808         if (*nt == (uint64_t)-1) {
 809                 return (time_t)-1;
 810         }
 811
 812         if (*nt == NTTIME_INFINITY) {
 813                 return (time_t)-1;
 814         }
 815
 816         /* reverse the time */
 817         /* it's a negative value, turn it to positive */
 818         d=~*nt;
 819
 820         d += 1000*1000*10/2;
 821         d /= 1000*1000*10;
 822
 823         if (!(TIME_T_MIN <= ((time_t)d) && ((time_t)d) <= TIME_T_MAX)) {
 824                 return (time_t)0;
 825         }
 826
 827         return (time_t)d;
 828 }
 829
 830 time_t uint64s_nt_time_to_unix_abs(const uint64_t *src)
 831 {
 832         NTTIME nttime;
 833         nttime = *src;
 834         return nt_time_to_unix_abs(&nttime);
 835 }
 836
 837 /****************************************************************************
 838  Put a 8 byte filetime from a struct timespec. Uses GMT.
 839 ****************************************************************************/
 840
 841 void unix_timespec_to_nt_time(NTTIME *nt, struct timespec ts)
 842 {
 843         uint64_t d;
 844
 845         if (ts.tv_sec ==0 && ts.tv_nsec == 0) {
 846                 *nt = 0;
 847                 return;
 848         }
 849         if (ts.tv_sec == TIME_T_MAX) {
 850                 *nt = 0x7fffffffffffffffLL;
 851                 return;
 852         }
 853         if (ts.tv_sec == (time_t)-1) {
 854                 *nt = (uint64_t)-1;
 855                 return;
 856         }
 857
 858         d = ts.tv_sec;
 859         d += TIME_FIXUP_CONSTANT_INT;
 860         d *= 1000*1000*10;
 861         /* d is now in 100ns units. */
 862         d += (ts.tv_nsec / 100);
 863
 864         *nt = d;
 865 }
 866
 867 /****************************************************************************
 868  Convert a time_t to a NTTIME structure
 869
 870  This is an absolute version of the one above.
 871  By absolute I mean, it doesn't adjust from 1/1/1970 to 1/1/1601
 872  If the time_t was 5 seconds, the NTTIME is 5 seconds. JFM
 873 ****************************************************************************/
 874
 875 void unix_to_nt_time_abs(NTTIME *nt, time_t t)
 876 {
 877         double d;
 878
 879         if (t==0) {
 880                 *nt = 0;
 881                 return;
 882         }
 883
 884         if (t == TIME_T_MAX) {
 885                 *nt = 0x7fffffffffffffffLL;
 886                 return;
 887         }
 888
 889         if (t == (time_t)-1) {
 890                 /* that's what NT uses for infinite */
 891                 *nt = NTTIME_INFINITY;
 892                 return;
 893         }
 894
 895         d = (double)(t);
 896         d *= 1.0e7;
 897
 898         *nt = (NTTIME)d;
 899
 900         /* convert to a negative value */
 901         *nt=~*nt;
 902 }
 903
 904
 905 /****************************************************************************
 906  Check if it's a null mtime.
 907 ****************************************************************************/
 908
 909 bool null_mtime(time_t mtime)
 910 {
 911         if (mtime == 0 || mtime == (time_t)0xFFFFFFFF || mtime == (time_t)-1)
 912                 return true;
 913         return false;
 914 }
 915
 916 /****************************************************************************
 917  Utility function that always returns a const string even if localtime
 918  and asctime fail.
 919 ****************************************************************************/
 920
 921 const char *time_to_asc(const time_t t)
 922 {
 923         const char *asct;
 924         struct tm *lt = localtime(&t);
 925
 926         if (!lt) {
 927                 return "unknown time";
 928         }
 929
 930         asct = asctime(lt);
 931         if (!asct) {
 932                 return "unknown time";
 933         }
 934         return asct;
 935 }
 936
 937 const char *display_time(NTTIME nttime)
 938 {
 939         float high;
 940         float low;
 941         int sec;
 942         int days, hours, mins, secs;
 943
 944         if (nttime==0)
 945                 return "Now";
 946
 947         if (nttime==NTTIME_INFINITY)
 948                 return "Never";
 949
 950         high = 65536;
 951         high = high/10000;
 952         high = high*65536;
 953         high = high/1000;
 954         high = high * (~(nttime >> 32));
 955
 956         low = ~(nttime & 0xFFFFFFFF);
 957         low = low/(1000*1000*10);
 958
 959         sec=(int)(high+low);
 960
 961         days=sec/(60*60*24);
 962         hours=(sec - (days*60*60*24)) / (60*60);
 963         mins=(sec - (days*60*60*24) - (hours*60*60) ) / 60;
 964         secs=sec - (days*60*60*24) - (hours*60*60) - (mins*60);
 965
 966         return talloc_asprintf(talloc_tos(), "%u days, %u hours, %u minutes, "
 967                                "%u seconds", days, hours, mins, secs);
 968 }
 969
 970 bool nt_time_is_set(const NTTIME *nt)
 971 {
 972         if (*nt == 0x7FFFFFFFFFFFFFFFLL) {
 973                 return false;
 974         }
 975
 976         if (*nt == NTTIME_INFINITY) {
 977                 return false;
 978         }
 979
 980         return true;
 981 }