Originální popis anglicky:
time - get time in seconds
Návod, kniha: Linux Programmer's Manual
#include <time.h>
time_t time(time_t *t);
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.
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.
- EFAULT
- t points outside your accessible address space.
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 naïve
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 synchronised 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.
SVr4, SVID, POSIX, X/OPEN, BSD 4.3
Under BSD 4.3, this call is obsoleted by
gettimeofday(2). POSIX does not
specify any error conditions.
date(1),
gettimeofday(2),
ctime(3),
ftime(3)
