// Chtimes changes the modification and access time of a given file. func Chtimes(path string, atime, mtime time.Time) error { // https://github.com/torvalds/linux/blob/2decb2682f80759f631c8332f9a2a34a02150a03/include/uapi/linux/fcntl.h#L56 var utimes [2]unix.Timespec utimes[0] = unix.NsecToTimespec(atime.UnixNano()) utimes[1] = unix.NsecToTimespec(mtime.UnixNano()) if e := unix.UtimesNanoAt(unix.AT_FDCWD, path, utimes[0:], unix.AT_SYMLINK_NOFOLLOW); e != nil { return &os.PathError{Op: "futimesat", Path: path, Err: e} } return nil }
func TestPpoll(t *testing.T) { f, cleanup := mktmpfifo(t) defer cleanup() const timeout = 100 * time.Millisecond ok := make(chan bool, 1) go func() { select { case <-time.After(10 * timeout): t.Errorf("Ppoll: failed to timeout after %d", 10*timeout) case <-ok: } }() fds := []unix.PollFd{{Fd: int32(f.Fd()), Events: unix.POLLIN}} timeoutTs := unix.NsecToTimespec(int64(timeout)) n, err := unix.Ppoll(fds, &timeoutTs, nil) ok <- true if err != nil { t.Errorf("Ppoll: unexpected error: %v", err) return } if n != 0 { t.Errorf("Ppoll: wrong number of events: got %v, expected %v", n, 0) return } }
// durationToTimespec prepares a timeout value func durationToTimespec(d time.Duration) unix.Timespec { return unix.NsecToTimespec(d.Nanoseconds()) }