test_tarfile writes in Lib/test directory

[jackjansen]

BPO	731403
Nosy	@brettcannon, @jackjansen

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = 'https://github.com/brettcannon'
closed_at = <Date 2003-06-12.08:03:19.000>
created_at = <Date 2003-05-02.15:20:24.000>
labels = []
title = 'test_tarfile writes in Lib/test directory'
updated_at = <Date 2003-06-12.08:03:19.000>
user = 'https://github.com/jackjansen'

bugs.python.org fields:

activity = <Date 2003-06-12.08:03:19.000>
actor = 'brett.cannon'
assignee = 'brett.cannon'
closed = True
closed_date = None
closer = None
components = ['None']
creation = <Date 2003-05-02.15:20:24.000>
creator = 'jackjansen'
dependencies = []
files = []
hgrepos = []
issue_num = 731403
keywords = []
message_count = 2.0
messages = ['15821', '15822']
nosy_count = 2.0
nosy_names = ['brett.cannon', 'jackjansen']
pr_nums = []
priority = 'normal'
resolution = 'fixed'
stage = None
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue731403'
versions = []

[jackjansen]

Test_tarfile writes a file in the Lib/test directory, which fails if Python
has been installed read-only. It would be better if it used
test_support.TESTFN as the basis for a filename to write to.

Here's the message for a binary install on MacOSX (framework
Python):

test test_tarfile crashed -- exceptions.IOError: [Errno 13] Permission
denied: '/Library/Frameworks/Python.framework/Versions/2.3/lib/
python2.3/test/testtar.tar.gz'

[brettcannon]

Logged In: YES
user_id=357491

Fixed the temp file name to use test_support.TESTFN and the
temp directory to use tempfile.gettempdir . Also fixed the
fetching of path names to use the functions used in the file
instead of getting it from the global variables.

Changed filename to be absolute for testar.tar instead of using
os.extsep since name is locked in since it is in CVS.

All checked in as revision 1.10 .