Message 376684 - Python tracker

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In-reply-to
Author	eryksun
Recipients	Carl Osterwisch, Gabi.Davar, John Florian, chary314, dabrahams, davide.rizzo, dlenski, eric.araujo, eric.smith, eryksun, ethan smith, jaraco, jwilk, martin.panter, ncoghlan, njs, paul.moore, piotr.dobrogost, pitrou, r.david.murray, sbt, steve.dower, tim.golden, zach.ware
Date	2020年09月10日.13:22:00
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1599744120.2.0.661501152484.issue14243@roundup.psfhosted.org>

Content
> we'd have to reimplement the UCRT function using the system API. Could the implementation drop support for os.O_TEXT? I think Python 3 should have removed both os.O_TEXT and os.O_BINARY. 3.x has no need for the C runtime's ANSI text mode, with its Ctrl+Z behavior inherited from MS-DOS. I'd prefer that os.open always used _O_BINARY and raised a ValueError if passed any of the C runtime's text modes, including _O_TEXT, _O_WTEXT, _O_U16TEXT, and _O_U8TEXT. If _O_TEXT is supported, then we have to copy the C runtime's behavior, which truncates a Ctrl+Z from the end of the file if it's opened with read-write access. If Unicode text modes are supported, then we have to read the BOM, which can involve opening the file twice if the caller doesn't request read access.

Content

> we'd have to reimplement the UCRT function using the system API. 
Could the implementation drop support for os.O_TEXT? I think Python 3 should have removed both os.O_TEXT and os.O_BINARY. 3.x has no need for the C runtime's ANSI text mode, with its Ctrl+Z behavior inherited from MS-DOS. I'd prefer that os.open always used _O_BINARY and raised a ValueError if passed any of the C runtime's text modes, including _O_TEXT, _O_WTEXT, _O_U16TEXT, and _O_U8TEXT.
If _O_TEXT is supported, then we have to copy the C runtime's behavior, which truncates a Ctrl+Z from the end of the file if it's opened with read-write access. If Unicode text modes are supported, then we have to read the BOM, which can involve opening the file twice if the caller doesn't request read access.

History
Date	User	Action	Args
2020年09月10日 13:22:00	eryksun	set	recipients: + eryksun, paul.moore, jaraco, ncoghlan, pitrou, eric.smith, tim.golden, jwilk, eric.araujo, r.david.murray, njs, dabrahams, davide.rizzo, sbt, Gabi.Davar, martin.panter, piotr.dobrogost, zach.ware, dlenski, steve.dower, Carl Osterwisch, ethan smith, John Florian, chary314
2020年09月10日 13:22:00	eryksun	set	messageid: <1599744120.2.0.661501152484.issue14243@roundup.psfhosted.org>
2020年09月10日 13:22:00	eryksun	link	issue14243 messages
2020年09月10日 13:22:00	eryksun	create

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