term% cat index.txt TIME(2) System Calls Manual TIME(2)
NAME
time, nsec - time in seconds and nanoseconds since epoch
SYNOPSIS
#include <u.h>
#include <libc.h>
long time(long *tp)
vlong nsec(void)
DESCRIPTION
Both time and nsec return the time since the epoch 00:00:00 GMT, Jan.
1, 1970. The return value of the former is in seconds and the latter
in nanoseconds. For time, if tp is not zero then *tp is also set to
the answer.
Times from time should be stored in and treated as ulongs; this extends
the range of valid times into the year 2106.
Time simply calls nsec and returns the value divided by 1000000000.
Nsec is a system call. Previous implementations read /dev/bintime,
opening that file when first called, and maintaining a static file de‐
scriptor; however, the maintenance of file descriptors in the face of
process forks is overly complex and prone to error.
SOURCE
/sys/src/libc/9sys/time.c
/sys/src/libc/9syscall
SEE ALSO
cputime(2), cons(3)
DIAGNOSTICS
Sets errstr.
TIME(2)