3 time, nsec \- time in seconds and nanoseconds since epoch
20 return the time since the epoch 00:00:00 GMT, Jan. 1, 1970.
21 The return value of the former is in seconds and the latter in nanoseconds.
28 is also set to the answer.
30 These functions work by reading
32 opening that file when they are first called.
34 .B /sys/src/libc/9sys/time.c
36 .B /sys/src/libc/9sys/nsec.c
44 These routines maintain a static file descriptor.