// 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())
}