NAME
ftime — get date and time more precisely
SYNOPSIS
#include <sys/timeb.h>
int ftime(struct timeb *tp);
Remarks
This facility is provided for backwards compatibility with Version 7 systems.
Either
time()
or
gettimeofday()
should be used in new programs.
DESCRIPTION
ftime()
fills in a structure pointed to by its argument, as defined by
<sys/timeb.h>:
/*
* Structure returned by ftime system call
*/
struct timeb {
time_t time;
unsigned short millitm;
short timezone;
short dstflag;
};
The structure contains the time in seconds
since 00:00:00
UTC
(Coordinated Universal Time), January 1, 1970,
up to 1000 milliseconds of more-precise interval,
the local timezone (measured in minutes of time westward from UTC),
and a flag that, if nonzero, indicates that
Daylight Saving time applies locally during the appropriate part of the year.
Consult
gettimeofday(2)
for more details on the meaning of the timezone field.
ftime()
can fail for exactly the same reasons as
gettimeofday(2).
WARNINGS
The millisecond value usually has a granularity greater than one
due to the resolution of the system clock.
Depending on any granularity
(particularly a granularity of one)
renders code non-portable.
STANDARDS CONFORMANCE
ftime(): XPG4.2
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