os.CLD_KILLED and os.CLD_STOPPED should be implemented

[clintolsen]

BPO	38493
Nosy	@serhiy-storchaka, @corona10, @clintolsen
PRs	bpo-38493: Add os.CLD_KILLED and CLD_STOPPED for os #16821

^{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 = <Date 2019-10-21.07:02:12.948>
created_at = <Date 2019-10-16.04:36:12.740>
labels = ['type-feature', '3.9']
title = 'os.CLD_KILLED and os.CLD_STOPPED should be implemented'
updated_at = <Date 2019-10-21.07:02:12.947>
user = 'https://github.com/clintolsen'

bugs.python.org fields:

activity = <Date 2019-10-21.07:02:12.947>
actor = 'serhiy.storchaka'
assignee = 'none'
closed = True
closed_date = <Date 2019-10-21.07:02:12.948>
closer = 'serhiy.storchaka'
components = []
creation = <Date 2019-10-16.04:36:12.740>
creator = 'clintolsen'
dependencies = []
files = []
hgrepos = []
issue_num = 38493
keywords = ['patch']
message_count = 5.0
messages = ['354769', '354798', '354826', '355027', '355028']
nosy_count = 4.0
nosy_names = ['rosslagerwall', 'serhiy.storchaka', 'corona10', 'clintolsen']
pr_nums = ['16821']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue38493'
versions = ['Python 3.9']

[clintolsen]

I was running some experiments with os.waitid() and noticed that os.CLD_KILLED is not listed in the documentation.

However, if a process is killed by the system this (missing) value is returned from this function. It seems like possible constant values should be covered or at least documented as such? How should we code around unsupported constant values?

[serhiy-storchaka]

What about CLD_STOPPED?

For reference, other CLD_* constants were added in bpo-10812.

[corona10]

What about CLD_STOPPED?

I think that it should be added also.
I 've added the CLD_STOPPED on PR 16821.

[serhiy-storchaka]

New changeset 2eba6ad by Serhiy Storchaka (Dong-hee Na) in branch 'master':
bpo-38493: Add os.CLD_KILLED and os.CLD_STOPPED. (GH-16821)
2eba6ad

[serhiy-storchaka]

Thank you for your contribution Dong-hee!