time - get time in seconds
time_t time(time_t *t);
() returns the time as the number of seconds since the Epoch,
1970-01-01 00:00:00 +0000 (UTC).
is non-NULL, the return value is also stored in the memory pointed
to by t
On success, the value of time in seconds since the Epoch is returned. On error,
is returned, and errno
- t points outside your accessible address space.
SVr4, 4.3BSD, C89, C99, POSIX.1-2001. POSIX does not specify any error
POSIX.1 defines seconds since the Epoch
using a formula that approximates
the number of seconds between a specified time and the Epoch. This formula
takes account of the facts that all years that are evenly divisible by 4 are
leap years, but years that are evenly divisible by 100 are not leap years
unless they are also evenly divisible by 400, in which case they 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 system 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.1-2008 Rationale A.4.15 for further rationale.
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