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samba-mirror/source3/lib/time.c

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/*
Unix SMB/CIFS implementation.
time handling functions
Copyright (C) Andrew Tridgell 1992-2004
Copyright (C) Stefan (metze) Metzmacher 2002
Copyright (C) Jeremy Allison 2007
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
/**
* @file
* @brief time handling functions
*/
#define NTTIME_INFINITY (NTTIME)0x8000000000000000LL
#if (SIZEOF_LONG == 8)
#define TIME_FIXUP_CONSTANT_INT 11644473600L
#elif (SIZEOF_LONG_LONG == 8)
#define TIME_FIXUP_CONSTANT_INT 11644473600LL
#endif
/**************************************************************
Handle conversions between time_t and uint32, taking care to
preserve the "special" values.
**************************************************************/
uint32_t convert_time_t_to_uint32_t(time_t t)
{
#if (defined(SIZEOF_TIME_T) && (SIZEOF_TIME_T == 8))
/* time_t is 64-bit. */
if (t == 0x8000000000000000LL) {
return 0x80000000;
} else if (t == 0x7FFFFFFFFFFFFFFFLL) {
return 0x7FFFFFFF;
}
#endif
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return (uint32_t)t;
}
time_t convert_uint32_t_to_time_t(uint32_t u)
{
#if (defined(SIZEOF_TIME_T) && (SIZEOF_TIME_T == 8))
/* time_t is 64-bit. */
if (u == 0x80000000) {
return (time_t)0x8000000000000000LL;
} else if (u == 0x7FFFFFFF) {
return (time_t)0x7FFFFFFFFFFFFFFFLL;
}
#endif
return (time_t)u;
}
/****************************************************************************
Check if NTTIME is 0.
****************************************************************************/
bool nt_time_is_zero(const NTTIME *nt)
{
return (*nt == 0);
}
/****************************************************************************
Convert ASN.1 GeneralizedTime string to unix-time.
Returns 0 on failure; Currently ignores timezone.
****************************************************************************/
time_t generalized_to_unix_time(const char *str)
{
struct tm tm;
ZERO_STRUCT(tm);
if (sscanf(str, "%4d%2d%2d%2d%2d%2d",
&tm.tm_year, &tm.tm_mon, &tm.tm_mday,
&tm.tm_hour, &tm.tm_min, &tm.tm_sec) != 6) {
return 0;
}
tm.tm_year -= 1900;
tm.tm_mon -= 1;
return timegm(&tm);
}
/*******************************************************************
Accessor function for the server time zone offset.
set_server_zone_offset() must have been called first.
******************************************************************/
static int server_zone_offset;
int get_server_zone_offset(void)
{
return server_zone_offset;
}
/*******************************************************************
Initialize the server time zone offset. Called when a client connects.
******************************************************************/
int set_server_zone_offset(time_t t)
{
server_zone_offset = get_time_zone(t);
return server_zone_offset;
}
/***************************************************************************
Server versions of the above functions.
***************************************************************************/
void srv_put_dos_date(char *buf,int offset,time_t unixdate)
{
push_dos_date((uint8_t *)buf, offset, unixdate, server_zone_offset);
}
void srv_put_dos_date2(char *buf,int offset, time_t unixdate)
{
push_dos_date2((uint8_t *)buf, offset, unixdate, server_zone_offset);
}
void srv_put_dos_date3(char *buf,int offset,time_t unixdate)
{
push_dos_date3((uint8_t *)buf, offset, unixdate, server_zone_offset);
}
void round_timespec(enum timestamp_set_resolution res, struct timespec *ts)
{
switch (res) {
case TIMESTAMP_SET_SECONDS:
round_timespec_to_sec(ts);
break;
case TIMESTAMP_SET_MSEC:
round_timespec_to_usec(ts);
break;
case TIMESTAMP_SET_NT_OR_BETTER:
/* No rounding needed. */
break;
}
}
/****************************************************************************
Take a Unix time and convert to an NTTIME structure and place in buffer
pointed to by p, rounded to the correct resolution.
****************************************************************************/
void put_long_date_timespec(enum timestamp_set_resolution res, char *p, struct timespec ts)
{
NTTIME nt;
round_timespec(res, &ts);
nt = unix_timespec_to_nt_time(ts);
SBVAL(p, 0, nt);
}
void put_long_date(char *p, time_t t)
{
struct timespec ts;
ts.tv_sec = t;
ts.tv_nsec = 0;
put_long_date_timespec(TIMESTAMP_SET_SECONDS, p, ts);
}
void dos_filetime_timespec(struct timespec *tsp)
{
tsp->tv_sec &= ~1;
tsp->tv_nsec = 0;
}
/*******************************************************************
Create a unix date (int GMT) from a dos date (which is actually in
localtime).
********************************************************************/
time_t make_unix_date(const void *date_ptr, int zone_offset)
{
return pull_dos_date(date_ptr, zone_offset);
}
/*******************************************************************
Like make_unix_date() but the words are reversed.
********************************************************************/
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time_t make_unix_date2(const void *date_ptr, int zone_offset)
{
return pull_dos_date2(date_ptr, zone_offset);
}
/*******************************************************************
Create a unix GMT date from a dos date in 32 bit "unix like" format
these generally arrive as localtimes, with corresponding DST.
******************************************************************/
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time_t make_unix_date3(const void *date_ptr, int zone_offset)
{
return pull_dos_date3(date_ptr, zone_offset);
}
time_t srv_make_unix_date(const void *date_ptr)
{
return make_unix_date(date_ptr, server_zone_offset);
}
time_t srv_make_unix_date2(const void *date_ptr)
{
return make_unix_date2(date_ptr, server_zone_offset);
}
time_t srv_make_unix_date3(const void *date_ptr)
{
return make_unix_date3(date_ptr, server_zone_offset);
}
/****************************************************************************
Interprets an nt time into a unix struct timespec.
Differs from nt_time_to_unix in that an 8 byte value of 0xffffffffffffffff
will be returned as (time_t)-1, whereas nt_time_to_unix returns 0 in this case.
****************************************************************************/
struct timespec interpret_long_date(const char *p)
{
NTTIME nt;
nt = BVAL(p, 0);
if (nt == (uint64_t)-1) {
struct timespec ret;
ret.tv_sec = (time_t)-1;
ret.tv_nsec = 0;
return ret;
}
return nt_time_to_unix_timespec(nt);
}
/*******************************************************************
Re-read the smb serverzone value.
******************************************************************/
static struct timeval start_time_hires;
void TimeInit(void)
{
set_server_zone_offset(time(NULL));
DEBUG(4,("TimeInit: Serverzone is %d\n", server_zone_offset));
/* Save the start time of this process. */
if (start_time_hires.tv_sec == 0 && start_time_hires.tv_usec == 0) {
GetTimeOfDay(&start_time_hires);
}
}
/**********************************************************************
Return a timeval struct of the uptime of this process. As TimeInit is
done before a daemon fork then this is the start time from the parent
daemon start. JRA.
***********************************************************************/
void get_process_uptime(struct timeval *ret_time)
{
struct timeval time_now_hires;
GetTimeOfDay(&time_now_hires);
ret_time->tv_sec = time_now_hires.tv_sec - start_time_hires.tv_sec;
if (time_now_hires.tv_usec < start_time_hires.tv_usec) {
ret_time->tv_sec -= 1;
ret_time->tv_usec = 1000000 + (time_now_hires.tv_usec - start_time_hires.tv_usec);
} else {
ret_time->tv_usec = time_now_hires.tv_usec - start_time_hires.tv_usec;
}
}
/**
* @brief Get the startup time of the server.
*
* @param[out] ret_time A pointer to a timveal structure to set the startup
* time.
*/
void get_startup_time(struct timeval *ret_time)
{
ret_time->tv_sec = start_time_hires.tv_sec;
ret_time->tv_usec = start_time_hires.tv_usec;
}
/****************************************************************************
Convert a NTTIME structure to a time_t.
It's originally in "100ns units".
This is an absolute version of the one above.
By absolute I mean, it doesn't adjust from 1/1/1601 to 1/1/1970
if the NTTIME was 5 seconds, the time_t is 5 seconds. JFM
****************************************************************************/
time_t nt_time_to_unix_abs(const NTTIME *nt)
{
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uint64_t d;
if (*nt == 0) {
return (time_t)0;
}
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if (*nt == (uint64_t)-1) {
return (time_t)-1;
}
if (*nt == NTTIME_INFINITY) {
return (time_t)-1;
}
/* reverse the time */
/* it's a negative value, turn it to positive */
d=~*nt;
d += 1000*1000*10/2;
d /= 1000*1000*10;
if (!(TIME_T_MIN <= ((time_t)d) && ((time_t)d) <= TIME_T_MAX)) {
return (time_t)0;
}
return (time_t)d;
}
time_t uint64s_nt_time_to_unix_abs(const uint64_t *src)
{
NTTIME nttime;
nttime = *src;
return nt_time_to_unix_abs(&nttime);
}
/****************************************************************************
Convert a time_t to a NTTIME structure
This is an absolute version of the one above.
By absolute I mean, it doesn't adjust from 1/1/1970 to 1/1/1601
If the time_t was 5 seconds, the NTTIME is 5 seconds. JFM
****************************************************************************/
void unix_to_nt_time_abs(NTTIME *nt, time_t t)
{
double d;
if (t==0) {
*nt = 0;
return;
}
if (t == TIME_T_MAX) {
*nt = 0x7fffffffffffffffLL;
return;
}
if (t == (time_t)-1) {
/* that's what NT uses for infinite */
*nt = NTTIME_INFINITY;
return;
}
d = (double)(t);
d *= 1.0e7;
*nt = (NTTIME)d;
/* convert to a negative value */
*nt=~*nt;
}
/****************************************************************************
Utility function that always returns a const string even if localtime
and asctime fail.
****************************************************************************/
const char *time_to_asc(const time_t t)
{
const char *asct;
struct tm *lt = localtime(&t);
if (!lt) {
return "unknown time";
}
asct = asctime(lt);
if (!asct) {
return "unknown time";
}
return asct;
}
const char *display_time(NTTIME nttime)
{
float high;
float low;
int sec;
int days, hours, mins, secs;
if (nttime==0)
return "Now";
if (nttime==NTTIME_INFINITY)
return "Never";
high = 65536;
high = high/10000;
high = high*65536;
high = high/1000;
high = high * (~(nttime >> 32));
low = ~(nttime & 0xFFFFFFFF);
low = low/(1000*1000*10);
sec=(int)(high+low);
days=sec/(60*60*24);
hours=(sec - (days*60*60*24)) / (60*60);
mins=(sec - (days*60*60*24) - (hours*60*60) ) / 60;
secs=sec - (days*60*60*24) - (hours*60*60) - (mins*60);
return talloc_asprintf(talloc_tos(), "%u days, %u hours, %u minutes, "
"%u seconds", days, hours, mins, secs);
}
bool nt_time_is_set(const NTTIME *nt)
{
if (*nt == 0x7FFFFFFFFFFFFFFFLL) {
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return false;
}
if (*nt == NTTIME_INFINITY) {
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return false;
}
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return true;
}