ReadError when open a tarfile for writing

[serhiy-storchaka]

BPO	20243
Nosy	@birkenfeld, @gustaebel, @serhiy-storchaka
Dependencies	bpo-20238: Incomplete gzip output with tarfile.open(fileobj=..., mode="w:gz")
Files	tarfile_readerror_write_mode.patch

^{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/serhiy-storchaka'
closed_at = <Date 2014-01-18.15:19:15.862>
created_at = <Date 2014-01-13.19:59:44.505>
labels = ['type-bug', 'library']
title = 'ReadError when open a tarfile for writing'
updated_at = <Date 2014-01-18.15:19:15.861>
user = 'https://github.com/serhiy-storchaka'

bugs.python.org fields:

activity = <Date 2014-01-18.15:19:15.861>
actor = 'serhiy.storchaka'
assignee = 'serhiy.storchaka'
closed = True
closed_date = <Date 2014-01-18.15:19:15.862>
closer = 'serhiy.storchaka'
components = ['Library (Lib)']
creation = <Date 2014-01-13.19:59:44.505>
creator = 'serhiy.storchaka'
dependencies = ['20238']
files = ['33449']
hgrepos = []
issue_num = 20243
keywords = ['patch']
message_count = 2.0
messages = ['208044', '208401']
nosy_count = 4.0
nosy_names = ['georg.brandl', 'lars.gustaebel', 'python-dev', 'serhiy.storchaka']
pr_nums = []
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue20243'
versions = ['Python 2.7', 'Python 3.3', 'Python 3.4']

[serhiy-storchaka]

ReadError can be raised when open a tarfile in write mode (e.g. 'w:gz'). Here is a patch wish a test. In additional it rewrites the handling errors in gzopen() which is too complicated now. This complication is possible the cause of bugs bpo-11513 and bpo-20238.

[python-dev]

New changeset 61b6accbca9f by Serhiy Storchaka in branch '2.7':
Issue bpo-20243: TarFile no longer raise ReadError when opened in write mode.
http://hg.python.org/cpython/rev/61b6accbca9f

New changeset 2f3b47b63f91 by Serhiy Storchaka in branch '3.3':
Issue bpo-20243: TarFile no longer raise ReadError when opened in write mode.
http://hg.python.org/cpython/rev/2f3b47b63f91

New changeset 40a5c7547c3d by Serhiy Storchaka in branch 'default':
Issue bpo-20243: TarFile no longer raise ReadError when opened in write mode.
http://hg.python.org/cpython/rev/40a5c7547c3d