The Open Group Base Specifications Issue 7
IEEE Std 1003.1, 2013 Edition
Copyright © 2001-2013 The IEEE and The Open Group

#### 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.

The following sections are informative.

#### 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.

End of informative text.

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