gettimeofday - get the date and time
The function obtains the current time, expressed as seconds and
microseconds since Epoch, and stores it in the structure pointed to by
The resolution of the system clock is one microsecond.
Programs should use this time zone information only in the absence of
the environment variable.
tp A pointer to a structure in which the current time is returned.
The structure includes the following members:
tzp If this parameter is not a null pointer, it is interpreted as a
pointer to a structure under HP-UX. The structure has the follow‐
tz_minuteswest The number of minutes that the local time zone is
west of Coordinated Universal Time (UTC) or Epoch.
tz_dsttime A flag that, if nonzero, indicates that Daylight
Savings Time (DST) applies locally during the
appropriate part of the year.
returns the following values under HP-UX:
is set to indicate the error.
If fails, is set to the following value under HP-UX:
[EFAULT] An argument address referenced invalid memory.
The following HP-UX example calls twice. It then computes the lapsed
time between the calls in seconds and microseconds and stores the
result in a timeval structure:
Relying on a granularity of one microsecond may result in code that is
not portable to other platforms.
was developed by the University of California, Berkeley, and HP.
SEE ALSOdate(1), ftime(2), settimeofda(2), stime(2), time(2), ctime(3C).