#include <time.h> time_t time(time_t *tloc);
#include <sys/types.h> #include <sys/timeb.h> ftime(struct timeb *tp);
Time returns the value of time in seconds since 00:00:00 GMT, January 1, 1970.
If tloc is nonnull, the return value is also stored in the place to which tloc points.
The BSD ftime function fills in a structure pointed to by its argument, as defined in <sys/timeb.h>. The structure contains the time since the epoch in seconds, up to 1000 milliseconds of more-precise interval, the local time zone (measured in minutes of time westward from Greenwich), and a flag that, if nonzero, indicates that Daylight Saving time applies locally during the appropriate part of the year.