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.  The two  times
       are  specified in calendar time, which represents the time
       elapsed since 00:00:00 on  January  1,  1970,  Coordinated
       Universal Time (UTC).

CONFORMING TO
       SVID 3, BSD 4.3, ISO 9899

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

GNU                        July 2, 1993                         1