2 Unix SMB/CIFS implementation.
3 time handling functions
5 Copyright (C) Andrew Tridgell 1992-2004
6 Copyright (C) Stefan (metze) Metzmacher 2002
7 Copyright (C) Jeremy Allison 2007
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.
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.
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/>.
27 * @brief time handling functions
31 #define NTTIME_INFINITY (NTTIME)0x8000000000000000LL
33 #if (SIZEOF_LONG == 8)
34 #define TIME_FIXUP_CONSTANT_INT 11644473600L
35 #elif (SIZEOF_LONG_LONG == 8)
36 #define TIME_FIXUP_CONSTANT_INT 11644473600LL
41 parse a nttime as a large integer in a string and return a NTTIME
43 NTTIME nttime_from_string(const char *s)
45 return strtoull(s, NULL, 0);
48 /**************************************************************
49 Handle conversions between time_t and uint32, taking care to
50 preserve the "special" values.
51 **************************************************************/
53 uint32_t convert_time_t_to_uint32_t(time_t t)
55 #if (defined(SIZEOF_TIME_T) && (SIZEOF_TIME_T == 8))
56 /* time_t is 64-bit. */
57 if (t == 0x8000000000000000LL) {
59 } else if (t == 0x7FFFFFFFFFFFFFFFLL) {
66 time_t convert_uint32_t_to_time_t(uint32_t u)
68 #if (defined(SIZEOF_TIME_T) && (SIZEOF_TIME_T == 8))
69 /* time_t is 64-bit. */
70 if (u == 0x80000000) {
71 return (time_t)0x8000000000000000LL;
72 } else if (u == 0x7FFFFFFF) {
73 return (time_t)0x7FFFFFFFFFFFFFFFLL;
79 /****************************************************************************
81 ****************************************************************************/
83 bool nt_time_is_zero(const NTTIME *nt)
88 /****************************************************************************
89 Convert ASN.1 GeneralizedTime string to unix-time.
90 Returns 0 on failure; Currently ignores timezone.
91 ****************************************************************************/
93 time_t generalized_to_unix_time(const char *str)
99 if (sscanf(str, "%4d%2d%2d%2d%2d%2d",
100 &tm.tm_year, &tm.tm_mon, &tm.tm_mday,
101 &tm.tm_hour, &tm.tm_min, &tm.tm_sec) != 6) {
110 /*******************************************************************
111 Accessor function for the server time zone offset.
112 set_server_zone_offset() must have been called first.
113 ******************************************************************/
115 static int server_zone_offset;
117 int get_server_zone_offset(void)
119 return server_zone_offset;
122 /*******************************************************************
123 Initialize the server time zone offset. Called when a client connects.
124 ******************************************************************/
126 int set_server_zone_offset(time_t t)
128 server_zone_offset = get_time_zone(t);
129 return server_zone_offset;
132 /***************************************************************************
133 Server versions of the above functions.
134 ***************************************************************************/
136 void srv_put_dos_date(char *buf,int offset,time_t unixdate)
138 push_dos_date((uint8_t *)buf, offset, unixdate, server_zone_offset);
141 void srv_put_dos_date2(char *buf,int offset, time_t unixdate)
143 push_dos_date2((uint8_t *)buf, offset, unixdate, server_zone_offset);
146 void srv_put_dos_date3(char *buf,int offset,time_t unixdate)
148 push_dos_date3((uint8_t *)buf, offset, unixdate, server_zone_offset);
151 void round_timespec(enum timestamp_set_resolution res, struct timespec *ts)
154 case TIMESTAMP_SET_SECONDS:
155 round_timespec_to_sec(ts);
157 case TIMESTAMP_SET_MSEC:
158 round_timespec_to_usec(ts);
160 case TIMESTAMP_SET_NT_OR_BETTER:
161 /* No rounding needed. */
166 /****************************************************************************
167 Take a Unix time and convert to an NTTIME structure and place in buffer
168 pointed to by p, rounded to the correct resolution.
169 ****************************************************************************/
171 void put_long_date_timespec(enum timestamp_set_resolution res, char *p, struct timespec ts)
174 round_timespec(res, &ts);
175 unix_timespec_to_nt_time(&nt, ts);
176 SIVAL(p, 0, nt & 0xFFFFFFFF);
177 SIVAL(p, 4, nt >> 32);
180 void put_long_date(char *p, time_t t)
185 put_long_date_timespec(TIMESTAMP_SET_SECONDS, p, ts);
188 void dos_filetime_timespec(struct timespec *tsp)
194 /*******************************************************************
195 Create a unix date (int GMT) from a dos date (which is actually in
197 ********************************************************************/
199 time_t make_unix_date(const void *date_ptr, int zone_offset)
205 dos_date = IVAL(date_ptr,0);
211 interpret_dos_date(dos_date,&t.tm_year,&t.tm_mon,
212 &t.tm_mday,&t.tm_hour,&t.tm_min,&t.tm_sec);
222 /*******************************************************************
223 Like make_unix_date() but the words are reversed.
224 ********************************************************************/
226 time_t make_unix_date2(const void *date_ptr, int zone_offset)
230 x = IVAL(date_ptr,0);
231 x2 = ((x&0xFFFF)<<16) | ((x&0xFFFF0000)>>16);
234 return(make_unix_date((const void *)&x, zone_offset));
237 /*******************************************************************
238 Create a unix GMT date from a dos date in 32 bit "unix like" format
239 these generally arrive as localtimes, with corresponding DST.
240 ******************************************************************/
242 time_t make_unix_date3(const void *date_ptr, int zone_offset)
244 time_t t = (time_t)IVAL(date_ptr,0);
251 time_t srv_make_unix_date(const void *date_ptr)
253 return make_unix_date(date_ptr, server_zone_offset);
256 time_t srv_make_unix_date2(const void *date_ptr)
258 return make_unix_date2(date_ptr, server_zone_offset);
261 time_t srv_make_unix_date3(const void *date_ptr)
263 return make_unix_date3(date_ptr, server_zone_offset);
266 /****************************************************************************
267 Convert a normalized timeval to a timespec.
268 ****************************************************************************/
270 struct timespec convert_timeval_to_timespec(const struct timeval tv)
273 ts.tv_sec = tv.tv_sec;
274 ts.tv_nsec = tv.tv_usec * 1000;
278 /****************************************************************************
279 Convert a normalized timespec to a timeval.
280 ****************************************************************************/
282 struct timeval convert_timespec_to_timeval(const struct timespec ts)
285 tv.tv_sec = ts.tv_sec;
286 tv.tv_usec = ts.tv_nsec / 1000;
290 /****************************************************************************
291 Return a timespec for the current time
292 ****************************************************************************/
294 struct timespec timespec_current(void)
297 clock_gettime(CLOCK_REALTIME, &ts);
301 /****************************************************************************
302 Return the lesser of two timespecs.
303 ****************************************************************************/
305 struct timespec timespec_min(const struct timespec *ts1,
306 const struct timespec *ts2)
308 if (ts1->tv_sec < ts2->tv_sec) return *ts1;
309 if (ts1->tv_sec > ts2->tv_sec) return *ts2;
310 if (ts1->tv_nsec < ts2->tv_nsec) return *ts1;
314 /****************************************************************************
315 compare two timespec structures.
316 Return -1 if ts1 < ts2
317 Return 0 if ts1 == ts2
318 Return 1 if ts1 > ts2
319 ****************************************************************************/
321 int timespec_compare(const struct timespec *ts1, const struct timespec *ts2)
323 if (ts1->tv_sec > ts2->tv_sec) return 1;
324 if (ts1->tv_sec < ts2->tv_sec) return -1;
325 if (ts1->tv_nsec > ts2->tv_nsec) return 1;
326 if (ts1->tv_nsec < ts2->tv_nsec) return -1;
330 /****************************************************************************
331 Round up a timespec if nsec > 500000000, round down if lower,
333 ****************************************************************************/
335 void round_timespec_to_sec(struct timespec *ts)
337 ts->tv_sec = convert_timespec_to_time_t(*ts);
341 /****************************************************************************
342 Round a timespec to usec value.
343 ****************************************************************************/
345 void round_timespec_to_usec(struct timespec *ts)
347 struct timeval tv = convert_timespec_to_timeval(*ts);
348 *ts = convert_timeval_to_timespec(tv);
349 while (ts->tv_nsec > 1000000000) {
351 ts->tv_nsec -= 1000000000;
355 /****************************************************************************
356 Interprets an nt time into a unix struct timespec.
357 Differs from nt_time_to_unix in that an 8 byte value of 0xffffffffffffffff
358 will be returned as (time_t)-1, whereas nt_time_to_unix returns 0 in this case.
359 ****************************************************************************/
361 struct timespec interpret_long_date(const char *p)
364 nt = IVAL(p,0) + ((uint64_t)IVAL(p,4) << 32);
365 if (nt == (uint64_t)-1) {
367 ret.tv_sec = (time_t)-1;
371 return nt_time_to_unix_timespec(&nt);
374 /*******************************************************************
375 Re-read the smb serverzone value.
376 ******************************************************************/
378 static struct timeval start_time_hires;
382 set_server_zone_offset(time(NULL));
384 DEBUG(4,("TimeInit: Serverzone is %d\n", server_zone_offset));
386 /* Save the start time of this process. */
387 if (start_time_hires.tv_sec == 0 && start_time_hires.tv_usec == 0) {
388 GetTimeOfDay(&start_time_hires);
392 /**********************************************************************
393 Return a timeval struct of the uptime of this process. As TimeInit is
394 done before a daemon fork then this is the start time from the parent
396 ***********************************************************************/
398 void get_process_uptime(struct timeval *ret_time)
400 struct timeval time_now_hires;
402 GetTimeOfDay(&time_now_hires);
403 ret_time->tv_sec = time_now_hires.tv_sec - start_time_hires.tv_sec;
404 if (time_now_hires.tv_usec < start_time_hires.tv_usec) {
405 ret_time->tv_sec -= 1;
406 ret_time->tv_usec = 1000000 + (time_now_hires.tv_usec - start_time_hires.tv_usec);
408 ret_time->tv_usec = time_now_hires.tv_usec - start_time_hires.tv_usec;
413 * @brief Get the startup time of the server.
415 * @param[out] ret_time A pointer to a timveal structure to set the startup
418 void get_startup_time(struct timeval *ret_time)
420 ret_time->tv_sec = start_time_hires.tv_sec;
421 ret_time->tv_usec = start_time_hires.tv_usec;
425 /****************************************************************************
426 Convert a NTTIME structure to a time_t.
427 It's originally in "100ns units".
429 This is an absolute version of the one above.
430 By absolute I mean, it doesn't adjust from 1/1/1601 to 1/1/1970
431 if the NTTIME was 5 seconds, the time_t is 5 seconds. JFM
432 ****************************************************************************/
434 time_t nt_time_to_unix_abs(const NTTIME *nt)
442 if (*nt == (uint64_t)-1) {
446 if (*nt == NTTIME_INFINITY) {
450 /* reverse the time */
451 /* it's a negative value, turn it to positive */
457 if (!(TIME_T_MIN <= ((time_t)d) && ((time_t)d) <= TIME_T_MAX)) {
464 time_t uint64s_nt_time_to_unix_abs(const uint64_t *src)
468 return nt_time_to_unix_abs(&nttime);
471 /****************************************************************************
472 Put a 8 byte filetime from a struct timespec. Uses GMT.
473 ****************************************************************************/
475 void unix_timespec_to_nt_time(NTTIME *nt, struct timespec ts)
479 if (ts.tv_sec ==0 && ts.tv_nsec == 0) {
483 if (ts.tv_sec == TIME_T_MAX) {
484 *nt = 0x7fffffffffffffffLL;
487 if (ts.tv_sec == (time_t)-1) {
493 d += TIME_FIXUP_CONSTANT_INT;
495 /* d is now in 100ns units. */
496 d += (ts.tv_nsec / 100);
502 void nt_time_to_unix_timespec(struct timespec *ts, NTTIME t)
508 /* t starts in 100 nsec units since 1601-01-01. */
511 /* t is now in nsec units since 1601-01-01. */
513 t -= TIME_FIXUP_CONSTANT*1000*1000*100;
514 /* t is now in nsec units since the UNIX epoch 1970-01-01. */
516 ts->tv_sec = t / 1000000000LL;
518 if (TIME_T_MIN > ts->tv_sec || ts->tv_sec > TIME_T_MAX) {
524 ts->tv_nsec = t - ts->tv_sec*1000000000LL;
528 /****************************************************************************
529 Convert a time_t to a NTTIME structure
531 This is an absolute version of the one above.
532 By absolute I mean, it doesn't adjust from 1/1/1970 to 1/1/1601
533 If the time_t was 5 seconds, the NTTIME is 5 seconds. JFM
534 ****************************************************************************/
536 void unix_to_nt_time_abs(NTTIME *nt, time_t t)
545 if (t == TIME_T_MAX) {
546 *nt = 0x7fffffffffffffffLL;
550 if (t == (time_t)-1) {
551 /* that's what NT uses for infinite */
552 *nt = NTTIME_INFINITY;
561 /* convert to a negative value */
566 /****************************************************************************
567 Utility function that always returns a const string even if localtime
569 ****************************************************************************/
571 const char *time_to_asc(const time_t t)
574 struct tm *lt = localtime(&t);
577 return "unknown time";
582 return "unknown time";
587 const char *display_time(NTTIME nttime)
592 int days, hours, mins, secs;
597 if (nttime==NTTIME_INFINITY)
604 high = high * (~(nttime >> 32));
606 low = ~(nttime & 0xFFFFFFFF);
607 low = low/(1000*1000*10);
612 hours=(sec - (days*60*60*24)) / (60*60);
613 mins=(sec - (days*60*60*24) - (hours*60*60) ) / 60;
614 secs=sec - (days*60*60*24) - (hours*60*60) - (mins*60);
616 return talloc_asprintf(talloc_tos(), "%u days, %u hours, %u minutes, "
617 "%u seconds", days, hours, mins, secs);
620 bool nt_time_is_set(const NTTIME *nt)
622 if (*nt == 0x7FFFFFFFFFFFFFFFLL) {
626 if (*nt == NTTIME_INFINITY) {