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tarfile.py incurs exception from self.chmod() when tarball has g+s #47266

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zooko mannequin opened this issue May 30, 2008 · 3 comments
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tarfile.py incurs exception from self.chmod() when tarball has g+s #47266

zooko mannequin opened this issue May 30, 2008 · 3 comments
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@gustaebel
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type-bug An unexpected behavior, bug, or error

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@zooko
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Mannequin

zooko mannequin commented May 30, 2008

BPO 3016
Nosy @loewis, @gustaebel

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/gustaebel'
closed_at = <Date 2008-05-31.11:06:54.720>
created_at = <Date 2008-05-30.22:54:51.926>
labels = ['type-bug']
title = 'tarfile.py incurs exception from self.chmod() when tarball has g+s'
updated_at = <Date 2008-05-31.11:06:54.718>
user = 'https://bugs.python.org/zooko'

bugs.python.org fields:

activity = <Date 2008-05-31.11:06:54.718>
actor = 'lars.gustaebel'
assignee = 'lars.gustaebel'
closed = True
closed_date = <Date 2008-05-31.11:06:54.720>
closer = 'lars.gustaebel'
components = []
creation = <Date 2008-05-30.22:54:51.926>
creator = 'zooko'
dependencies = []
files = []
hgrepos = []
issue_num = 3016
keywords = []
message_count = 3.0
messages = ['67563', '67568', '67574']
nosy_count = 3.0
nosy_names = ['loewis', 'zooko', 'lars.gustaebel']
pr_nums = []
priority = 'normal'
resolution = 'works for me'
stage = None
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue3016'
versions = []
@zooko
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zooko mannequin commented May 30, 2008

As reported at https://bugs.launchpad.net/pyopenssl/+bug/236190 ,
tarfile.py incurs an "Operation not permitted" exception (on Mac OS
10.4) when it tries to untar the pyOpenSSL-0.6.tar.gz tarball, because
that tarball has directories in it marked as having the "g+s" bit.

(Why this leads to an "Operation not permitted" exception, I don't know.)

@zooko zooko mannequin added the type-bug An unexpected behavior, bug, or error label May 30, 2008
@loewis
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loewis mannequin commented May 31, 2008

I can't reproduce this. If I do

py> import tarfile
py> t=tarfile.open("pyOpenSSL-0.6.tar.gz","r:*")
py> t.extractall()
py>

it extracts just fine, and sets the s-bits. I've used the file at

http://downloads.sourceforge.net/pyopenssl/pyOpenSSL-0.6.tar.gz?modtime=1092355200&big_mirror=0

@loewis loewis mannequin assigned gustaebel May 31, 2008
@gustaebel
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gustaebel mannequin commented May 31, 2008

With some effort I could reproduce the problem (on a FAT32 filesystem),
but what we have here is clearly a usage problem. In unpack_tarfile() in
setuptools/archive_util.py TarFile's internal _extract_member() method
is used to extract the contents. For every non-fatal error (like a
failing chmod()) _extract_member() raises an ExtractError exception. In
TarFile.extract() these ExtractErrors are normally ignored. The
unpack_tarfile() function in setuptools needs some fixing, it should
either act more like TarFile.extract() or better use the public API.

@gustaebel gustaebel mannequin closed this as completed May 31, 2008
@ezio-melotti ezio-melotti transferred this issue from another repository Apr 10, 2022
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