NAME

gettimeofday - get the date and time

SYNOPSIS

[OB 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

Applications should use the clock_gettime() function instead of the obsolescent gettimeofday() function.

RATIONALE

None.

FUTURE DIRECTIONS

The gettimeofday() function may be removed in a future version.

SEE ALSO

clock_getres, ctime

XBD <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 standard.

Issue 7

The gettimeofday() function is marked obsolescent.