gettimeofday

GETTIMEOFDAY(3P)           POSIX Programmer's Manual          GETTIMEOFDAY(3P)



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.1‐2008, <sys_time.h>

COPYRIGHT
       Portions of this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
       -- Portable Operating System Interface (POSIX), The Open Group Base
       Specifications Issue 7, Copyright (C) 2013 by the Institute of
       Electrical and Electronics Engineers, Inc and The Open Group.  (This is
       POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) 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.unix.org/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 .



IEEE/The Open Group                  2013                     GETTIMEOFDAY(3P)