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

12       gettimeofday — get the date and time
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SYNOPSIS

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

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

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

32       No errors are defined.
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34       The following sections are informative.
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EXAMPLES

37       None.
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APPLICATION USAGE

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

44       None.
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FUTURE DIRECTIONS

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

50       clock_getres(), ctime()
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52       The Base Definitions volume of POSIX.1‐2017, <sys_time.h>
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55       Portions  of  this text are reprinted and reproduced in electronic form
56       from IEEE Std 1003.1-2017, Standard for Information Technology --  Por‐
57       table  Operating System Interface (POSIX), The Open Group Base Specifi‐
58       cations Issue 7, 2018 Edition, Copyright (C) 2018 by the  Institute  of
59       Electrical  and  Electronics Engineers, Inc and The Open Group.  In the
60       event of any discrepancy between this version and the original IEEE and
61       The  Open Group Standard, the original IEEE and The Open Group Standard
62       is the referee document. The original Standard can be  obtained  online
63       at http://www.opengroup.org/unix/online.html .
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65       Any  typographical  or  formatting  errors that appear in this page are
66       most likely to have been introduced during the conversion of the source
67       files  to  man page format. To report such errors, see https://www.ker‐
68       nel.org/doc/man-pages/reporting_bugs.html .
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72IEEE/The Open Group                  2017                     GETTIMEOFDAY(3P)
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