The ftime() function sets the time and millitm members of the timeb structure pointed to by tp. The
structure is defined in <sys/timeb.h> and contains the following members:
unsigned short millitm;
The time and millitm members contain the seconds and milliseconds portions, respectively, of the current time in seconds since 00:00:00 UTC (Coordinated Universal
Time), January 1, 1970.
The timezone member contains the local time zone. The dstflag member contains a flag that, if non-zero, indicates that Daylight Saving time applies locally during
the appropriate part of the year.
The contents of the timezone and dstflag members of tp after a call to ftime() are unspecified.