1GETTIMEOFDAY(3P)           POSIX Programmer's Manual          GETTIMEOFDAY(3P)
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PROLOG

6       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
7       implementation of this interface may differ (consult the  corresponding
8       Linux  manual page for details of Linux behavior), or the interface may
9       not be implemented on Linux.
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NAME

13       gettimeofday — get the date and time
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SYNOPSIS

16       #include <sys/time.h>
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18       int gettimeofday(struct timeval *restrict tp, void *restrict tzp);
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DESCRIPTION

21       The gettimeofday() function shall obtain the current time, expressed as
22       seconds  and  microseconds since the Epoch, and store it in the timeval
23       structure pointed to by tp.  The resolution  of  the  system  clock  is
24       unspecified.
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26       If tzp is not a null pointer, the behavior is unspecified.
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RETURN VALUE

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

33       No errors are defined.
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35       The following sections are informative.
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EXAMPLES

38       None.
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APPLICATION USAGE

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

45       None.
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FUTURE DIRECTIONS

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

51       clock_getres(), ctime()
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53       The Base Definitions volume of POSIX.1‐2008, <sys_time.h>
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56       Portions  of  this text are reprinted and reproduced in electronic form
57       from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
58       --  Portable  Operating  System  Interface (POSIX), The Open Group Base
59       Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri‐
60       cal  and  Electronics  Engineers,  Inc  and  The  Open Group.  (This is
61       POSIX.1-2008 with the 2013 Technical Corrigendum  1  applied.)  In  the
62       event of any discrepancy between this version and the original IEEE and
63       The Open Group Standard, the original IEEE and The Open Group  Standard
64       is  the  referee document. The original Standard can be obtained online
65       at http://www.unix.org/online.html .
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67       Any typographical or formatting errors that appear  in  this  page  are
68       most likely to have been introduced during the conversion of the source
69       files to man page format. To report such errors,  see  https://www.ker‐
70       nel.org/doc/man-pages/reporting_bugs.html .
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74IEEE/The Open Group                  2013                     GETTIMEOFDAY(3P)
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