why call _Py_set_inheritable(0) from os.open() when O_CLOEXEC?

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
25/100
Issue type
Refactor
Clarity
Needs clarification
Activity status
Stale
Tech stack
c, python
Domain
operating-systems

Research direction

Start by tracing os.open and _Py_set_inheritable when O_CLOEXEC is used, then review the linked BPO discussion and its two messages. Determine whether the call is redundant or required on supported platforms, and document the decision with any needed test coverage.

Written by the indexing model from the issue text.

Description

3.8 (EOL)
BPO 36615
Nosy @vstinner, @cagney

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 = None
closed_at = None
created_at = <Date 2019-04-12.14:46:33.267>
labels = ['3.8']
title = 'why call _Py_set_inheritable(0) from os.open() when O_CLOEXEC?'
updated_at = <Date 2019-04-12.14:50:18.302>
user = 'https://github.com/cagney'

bugs.python.org fields:

activity = <Date 2019-04-12.14:50:18.302>
actor = 'vstinner'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = []
creation = <Date 2019-04-12.14:46:33.267>
creator = 'cagney'
dependencies = []
files = []
hgrepos = []
issue_num = 36615
keywords = []
message_count = 2.0
messages = ['340050', '340051']
nosy_count = 2.0
nosy_names = ['vstinner', 'cagney']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = None
url = 'https://bugs.python.org/issue36615'
versions = ['Python 3.8']

Dominant language
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