NAME
gettimeofday — get
the date and time
SYNOPSIS
[XSI]
#include <sys/time.h>
int gettimeofday(struct timeval *restrict tp, void *restrict tzp);
DESCRIPTION
The gettimeofday () function shall obtain
the current time, expressed as seconds and microseconds since the Epoch, and
store it in the
timeval
structure pointed to by
tp. The
resolution of the system clock is unspecified.
If tzp is not a null pointer, the behavior is unspecified.
RETURN VALUE
The gettimeofday () function shall return
0 and no value shall be reserved to indicate an error.
ERRORS
No errors are defined.
EXAMPLES
None.
APPLICATION USAGE
None.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
ctime(3), ftime(3), the Base Definitions volume of IEEE Std 1003.1-2001 (“POSIX.1”), <sys/time.h>
CHANGE HISTORY
First released in Issue 4, Version 2.
Issue 5
Moved from X/OPEN UNIX extension to BASE.
Issue 6
The DESCRIPTION is updated to refer to "seconds since the Epoch" rather than "seconds since 00:00:00 UTC (Coordinated Universal Time), January 1 1970" for consistency with other time functions.
The
restrict keyword
is added to the gettimeofday () prototype for
alignment with the ISO/IEC 9899:1999
(“ISO C99”) standard.
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