GETTIMEOFDAY(3POSIX)

PROLOG
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.

NAME
gettimeofday — get the date and time

SYNOPSIS

#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()

The Base Definitions volume of POSIX.1-2017, <sys_time.h>

COPYRIGHT
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 .

Any typographical or formatting errors that appear in this page are most likely to have been introduced during the conversion of the source files to man page format. To report such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html .