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TIME(2)                    Linux Programmer's Manual                   TIME(2)



NAME
       time - get time in seconds

SYNOPSIS
       #include <time.h>

       time_t time(time_t *t);

DESCRIPTION
       time() returns the time since the Epoch (00:00:00 UTC, January 1, 1970), measured in seconds.

       If t is non-NULL, the return value is also stored in the memory pointed to by t.

RETURN VALUE
       On success, the value of time in seconds since the Epoch is returned.  On error, ((time_t) -1) is returned, and
       errno is set appropriately.

ERRORS
       EFAULT t points outside your accessible address space.

CONFORMING TO
       SVr4, 4.3BSD, C89, C99, POSIX.1-2001.  POSIX does not specify any error conditions.

NOTES
       POSIX.1 defines seconds since the Epoch as a value to be interpreted as the number of seconds between a  speci-
       fied  time  and the Epoch, according to a formula for conversion from UTC equivalent to conversion on the naive
       basis that leap seconds are ignored and all years divisible by 4 are leap years.  This value is not the same as
       the actual number of seconds between the time and the Epoch, because of leap seconds and because clocks are not
       required to be synchronized to a standard reference.  The intention is that the interpretation of seconds since
       the Epoch values be consistent; see POSIX.1 Annex B 2.2.2 for further rationale.

SEE ALSO
       date(1), gettimeofday(2), ctime(3), ftime(3), time(7)

COLOPHON
       This  page  is part of release 3.22 of the Linux man-pages project.  A description of the project, and informa-
       tion about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.



Linux                             1997-09-09                           TIME(2)