TIME(2) Linux Programmer's Manual TIME(2)NAMEtime - get time in seconds
SYNOPSIS
#include <time.h>
time_t time(time_t *t);
DESCRIPTIONtime() 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 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 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 ALSOdate(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.kernel.org/doc/man-pages/.
Linux 1997-09-09 TIME(2)
