[issue23234] refactor subprocess: use new OSError exceptions, factorize stdin.write() code

[STINNER Victor]

New submission from STINNER Victor:

Attached patch refactors subprocess code:

- use new OSError exceptions
- factorize stdin.write() code

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components: Extension Modules
files: subprocess.patch
keywords: patch
messages: 233974
nosy: haypo, serhiy.storchaka
priority: normal
severity: normal
status: open
title: refactor subprocess: use new OSError exceptions, factorize stdin.write() code
type: enhancement
versions: Python 3.4, Python 3.5
Added file: http://bugs.python.org/file37696/subprocess.patch

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<http://bugs.python.org/issue23234>
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