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Shell Programming and Scripting
Hour handling through parameter
Post 302902464 by DGPickett on Tuesday 20th of May 2014 04:24:28 PM
05-20-2014
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__________________________________
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LEARN ABOUT XFREE86
difftime
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 4.15 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)