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time
[get current calendar time (as single number)]

    SYNOPSIS
    #include <time.h>
    time_t time(time_t *t);

DESCRIPTION
time looks up the best available representation of the current time and returns it, encoded as a time_t. It stores the same value at t unless the argument is NULL.

RETURNS
A -1 result means the current time is not available; otherwise the result represents the current time.

COMPLIANCE
ANSI C requires time.

Supporting OS subroutine required. Some implementations require gettimeofday.