difftime man page on Kali

difftime man page on Kali

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DIFFTIME(3)		   Linux Programmer's Manual		   DIFFTIME(3)

NAME
       difftime - calculate time difference

SYNOPSIS
       #include <time.h>

       double difftime(time_t time1, time_t time0);

DESCRIPTION
       The  difftime()	function returns the number of seconds elapsed between
       time time1 and time time0, represented as a double.  Each of the	 times
       is  specified  in calendar time, which means its value is a measurement
       (in seconds) relative to the Epoch, 1970-01-01 00:00:00 +0000 (UTC).

ATTRIBUTES
       For  an	explanation  of	 the  terms  used   in	 this	section,   see
       attributes(7).

       ┌───────────┬───────────────┬─────────┐
       │Interface  │ Attribute	   │ Value   │
       ├───────────┼───────────────┼─────────┤
       │difftime() │ Thread safety │ MT-Safe │
       └───────────┴───────────────┴─────────┘
CONFORMING TO
       POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD.

NOTES
       On  a  POSIX  system,  time_t is an arithmetic type, and one could just
       define

	   #define difftime(t1,t0) (double)(t1 - t0)

       when the possible overflow in the subtraction is not a concern.

SEE ALSO
       date(1), gettimeofday(2), time(2), ctime(3), gmtime(3), localtime(3)

COLOPHON
       This page is part of release 4.14 of the Linux  man-pages  project.   A
       description  of	the project, information about reporting bugs, and the
       latest	 version    of	  this	  page,	   can	   be	  found	    at
       https://www.kernel.org/doc/man-pages/.

GNU				  2015-08-08			   DIFFTIME(3)

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