1DIFFTIME(3P)               POSIX Programmer's Manual              DIFFTIME(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       difftime - compute the difference between two calendar time values
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SYNOPSIS

15       #include <time.h>
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17       double difftime(time_t time1, time_t time0);
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DESCRIPTION

21       The difftime() function shall compute the difference between two calen‐
22       dar times (as returned by time()): time1- time0.
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RETURN VALUE

25       The  difftime()  function shall return the difference expressed in sec‐
26       onds as a type double.
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ERRORS

29       No errors are defined.
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31       The following sections are informative.
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EXAMPLES

34       None.
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APPLICATION USAGE

37       None.
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RATIONALE

40       None.
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FUTURE DIRECTIONS

43       None.
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SEE ALSO

46       asctime(), clock(), ctime(),  gmtime(),  localtime(),  mktime(),  strf‐
47       time(),  strptime(),  time(),  utime(),  the Base Definitions volume of
48       IEEE Std 1003.1-2001, <time.h>
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51       Portions of this text are reprinted and reproduced in  electronic  form
52       from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
53       -- Portable Operating System Interface (POSIX),  The  Open  Group  Base
54       Specifications  Issue  6,  Copyright  (C) 2001-2003 by the Institute of
55       Electrical and Electronics Engineers, Inc and The Open  Group.  In  the
56       event of any discrepancy between this version and the original IEEE and
57       The Open Group Standard, the original IEEE and The Open Group  Standard
58       is  the  referee document. The original Standard can be obtained online
59       at http://www.opengroup.org/unix/online.html .
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63IEEE/The Open Group                  2003                         DIFFTIME(3P)
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