tkqueue.py

import errno
import os
import select


def test_fd(fd):
    kqueue = select.kqueue()
    kevent = select.kevent(fd, filter=select.KQ_FILTER_READ, flags=select.KQ_EV_ADD | select.KQ_EV_ENABLE)
    events = kqueue.control([kevent], 1, 0.001)
    if not events:
        print "fd workss with kqueue"
        return
    assert len(events) == 1
    event = events[0]
    if (event.flags & select.KQ_EV_ERROR) == 0 or event.data != errno.EINVAL:
        print "fd workss with kqueue"
    else:
        print "fd does NOT work with kqueue"


tty_fd = os.open('/dev/tty', os.O_RDWR)
print "Testing if kqueue works with /dev/tty"
test_fd(tty_fd)

ttyname = os.ttyname(1)
ttyname_fd = os.open(ttyname, os.O_RDWR)
print "Testing if kqueue works with %s" % ttyname
test_fd(ttyname_fd)