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asyncio subprocess cannot read from /dev/stdin #90522

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asyncio subprocess cannot read from /dev/stdin#90522
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topic-asynciotype-bugAn unexpected behavior, bug, or error

Description

@xopham
xopham
mannequin
opened on Jan 13, 2022
BPO 46364
Nosy @asvetlov, @1st1, @xopham
PRs
  • bpo-46364: Use sockets only for stdin of asyncio on AIX #30596
    		•

    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 2022-01-13.08:18:32.782>
labels = ['type-bug', 'expert-asyncio']
title = 'asyncio subprocess cannot read from /dev/stdin'
updated_at = <Date 2022-02-01.18:11:58.688>
user = 'https://github.com/xopham'

    bugs.python.org fields:

    activity = <Date 2022-02-01.18:11:58.688>
actor = 'xoph'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['asyncio']
creation = <Date 2022-01-13.08:18:32.782>
creator = 'xoph'
dependencies = []
files = []
hgrepos = []
issue_num = 46364
keywords = ['patch']
message_count = 3.0
messages = ['410466', '410467', '412297']
nosy_count = 3.0
nosy_names = ['asvetlov', 'yselivanov', 'xoph']
pr_nums = ['30596']
priority = 'normal'
resolution = None
stage = 'patch review'
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue46364'
versions = []

    Activity

    1. xopham
      added
      topic-asyncio
      type-bugAn unexpected behavior, bug, or error
      on Jan 13, 2022

    2. xopham commented on Jan 13, 2022

      @xopham
      xophammannequin
      on Jan 13, 2022
      MannequinAuthor

      asyncio.create_subprocess_exec and asyncio.create_subprocess_shell fail with "No such device or address" when called on a program that attempts to invoke /dev/stdin on Linux.
      This happens in contrast to the subprocess module and was discussed in the this thread: https://stackoverflow.com/questions/70624413/how-to-read-from-dev-stdin-with-asyncio-create-subprocess-exec

      It seems while subprocess uses a pipe, asyncio uses socket.socketpair() to communicate with the subprocess which in turn appears to fail for /dev/stdin

    3. asvetlov commented on Jan 13, 2022

      @asvetlov
      asvetlov
      on Jan 13, 2022
      Contributor

      True. Would you make a pull request that uses socketpair on AIX only?
      A test for desired behavior is required.

    4. xopham commented on Feb 1, 2022

      @xopham
      xophammannequin
      on Feb 1, 2022
      MannequinAuthor

      Created a PR: #30596

      It's ready for review. Happy about any feedback!

    5. ezio-melotti
      transferred this issue fromon Apr 10, 2022
    6. ezio-melotti
      added this to asyncioon Jun 20, 2022
    7. ezio-melotti
      moved this to Todo in asyncioon Jul 17, 2022
    8. tifv
      added a commit that references this issue on Jul 18, 2022

      pythongh-90522: add test

      6477c7e
    9. xopham
      added a commit that references this issue on Aug 12, 2022

      pythongh-90522: add test

      ef62e67

    10. xopham commented on Aug 19, 2022

      @xopham
      xopham
      on Aug 19, 2022
      ContributorAuthor

      @1st1 @asvetlov the associated PR is ready, including tests. It's a small change. Would be happy to move this forward and resolve the issue 🙂

    11. xopham
      added a commit that references this issue on Oct 13, 2022

      pythongh-90522: add test

      0ac3aed
    12. kumaraditya303
      closed this as completedon Oct 13, 2022
    13. Repository owner moved this from Todo to Done in asyncioon Oct 13, 2022
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      Labels

      topic-asynciotype-bugAn unexpected behavior, bug, or error

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