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The stuff I posted when I opened this bug report was all
from running "make test".  I have now discovered the
"regrtest.py" file and am experimenting with it.  -s doesn't
seem to work for test_ioctl.py:

HACK pion:~/playground/python/python/dist/src$ ./python
./Lib/test/regrtest.py -v -s ./Lib/test/test_ioctl.py
./Lib/test/test_ioctl
test ./Lib/test/test_ioctl crashed -- exceptions.ValueError:
Empty module name
Traceback (most recent call last):
  File "./Lib/test/regrtest.py", line 394, in runtest
    the_package = __import__(abstest, globals(), locals(), [])
ValueError: Empty module name
1 test failed:
    ./Lib/test/test_ioctl
Traceback (most recent call last):
  File "./Lib/test/regrtest.py", line 1005, in ?
    main()
  File "./Lib/test/regrtest.py", line 332, in main
    os.unlink(filename)
OSError: [Errno 2] No such file or directory: '/tmp/pynexttest'


But running regrtest.py by itself runs a bunch of tests
including test_ioctl, apparently successfully:

HACK pion:~/playground/python/python/dist/src$ ./python
./Lib/test/regrtest.py
...
test_ioctl
...
224 tests OK.
31 tests skipped:
    test_aepack test_al test_bsddb185 test_bsddb3 test_bz2
test_cd
    test_cl test_curses test_dbm test_email_codecs test_gdbm
test_gl
    test_imgfile test_linuxaudiodev test_locale test_macfs
    test_macostools test_nis test_normalization test_ossaudiodev
    test_pep277 test_plistlib test_scriptpackages
test_socket_ssl
    test_socketserver test_sunaudiodev test_timeout
test_unicode_file
    test_urllibnet test_winreg test_winsound
4 skips unexpected on linux2:
    test_dbm test_bz2 test_gdbm test_locale


So I guess this is an "issue" in the make target rather than
in the ioctl code itself...