redhat man page for difftime

Query: difftime

OS: redhat

Section: 3

Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar

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. The two times are specified in calendar time, which represents the time elapsed since the Epoch (00:00:00 on January 1, 1970, Coordinated Universal Time (UTC)).
CONFORMING TO
SVID 3, BSD 4.3, ISO 9899
NOTES
This function is required by ANSI C. 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)
GNU
1993-07-02 DIFFTIME(3)
Related Man Pages
difftime(3p) - centos
difftime(3c) - sunos
difftime(3) - linux
difftime(3) - opendarwin
difftime(3) - php
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