gettimeofday(3p) — Linux manual page

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

PROLOG         top

       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         top

       gettimeofday — get the date and time

SYNOPSIS         top

       #include <sys/time.h>

       int gettimeofday(struct timeval *restrict tp, void *restrict tzp);

DESCRIPTION         top

       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         top

       The gettimeofday() function shall return 0 and no value shall be
       reserved to indicate an error.

ERRORS         top

       No errors are defined.

       The following sections are informative.

EXAMPLES         top

       None.

APPLICATION USAGE         top

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

RATIONALE         top

       None.

FUTURE DIRECTIONS         top

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

SEE ALSO         top

       clock_getres(3p), ctime(3p)

       The Base Definitions volume of POSIX.1‐2017, sys_time.h(0p)

COPYRIGHT         top

       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 .

IEEE/The Open Group               2017                  GETTIMEOFDAY(3P)

Pages that refer to this page: sys_time.h(0p),  time(3p)

HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH.