Message 237818 - Python tracker

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Author	mattip
Recipients	mattip, steve.dower, tim.golden, zach.ware
Date	2015-03-10.22:41:49
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1426027309.83.0.475753794617.issue23634@psf.upfronthosting.co.za>
In-reply-to

Content
If I have a read-only fd, and I try to open it as 'w' with os.fdopen(fd, 'w'), the operation raises on linux but succeeds on windows. Python relies on the underlying clib's fdopen to return an error, which glibc does, but MSVC happily closes the original fd and returns with no error. Would a patch to fix this be welcomed? A test demonstrating the issue is attached. The fix would be to check that the mode requested matches the mode of the argument fd. Related issues #22259 and #21191 did not consider this case

If I have a read-only fd, and I try to open it as 'w' with 

os.fdopen(fd, 'w'), 

the operation raises on linux but succeeds on windows. Python relies on the underlying clib's fdopen to return an error, which glibc does, but MSVC happily closes the original fd and returns with no error.

Would a patch to fix this be welcomed? A test demonstrating the issue is attached. The fix would be to check that the mode requested matches the mode of the argument fd.

Related issues #22259 and #21191 did not consider this case

History
Date	User	Action	Args
2015-03-10 22:41:49	mattip	set	recipients: + mattip, tim.golden, zach.ware, steve.dower
2015-03-10 22:41:49	mattip	set	messageid: <1426027309.83.0.475753794617.issue23634@psf.upfronthosting.co.za>
2015-03-10 22:41:49	mattip	link	issue23634 messages
2015-03-10 22:41:49	mattip	create