This manual page is part of the POSIX Programmer's Manual. The Linux
implementation of this interface may differ (consult the corresponding Linux
manual page for details of Linux behavior), or the interface may not be
implemented on Linux.
gettimeofday — get the date and time
int gettimeofday(struct timeval *restrict tp, void *restrict tzp);
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
If tzp is not a null pointer, the behavior is
The gettimeofday() function shall return 0 and no value shall be reserved
to indicate an error.
No errors are defined.
The following sections are informative.
Applications should use the clock_gettime() function instead of the
obsolescent gettimeofday() function.
The gettimeofday() function may be removed in a future version.
The Base Definitions volume of POSIX.1‐2017,
Portions of this text are reprinted and reproduced in electronic form from IEEE
Std 1003.1-2017, Standard for Information Technology -- Portable Operating
System Interface (POSIX), The Open Group Base Specifications Issue 7, 2018
Edition, Copyright (C) 2018 by the Institute of Electrical and Electronics
Engineers, Inc and The Open Group. In the event of any discrepancy between
this version and the original IEEE and The Open Group Standard, the original
IEEE and The Open Group Standard is the referee document. The original
Standard can be obtained online at http://www.opengroup.org/unix/online.html .
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