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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 specified time and the Epoch, according to a formula for con-
       version 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  sec-
       onds  and  because  clocks are not required to be synchronized to a standard refer-
       ence.  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 information about reporting bugs, can be found at  http://www.ker-
       nel.org/doc/man-pages/.



Linux                             1997-09-09                           TIME(2)

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