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gh-83925: Make asyncio.subprocess communicate similar to non-asyncio (#18650)

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subprocess's communicate(None) closes stdin of the child process, after
sending no (extra) data. Make asyncio variant do the same.
This fixes issues with processes that waits for EOF on stdin before
continuing.
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Marek Marczykowski-Górecki 2023-04-27 20:30:26 -04:00 • committed by GitHub
parent 424a785a07
commit 67d140dba7
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4 changed files with 32 additions and 7 deletions
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9
Doc/library/asyncio-subprocess.rst
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@ -207,8 +207,9 @@ their completion.
Interact with process:
1. send data to *stdin* (if *input* is not ``None``);
2. read data from *stdout* and *stderr*, until EOF is reached;
3. wait for process to terminate.
2. closes *stdin*;
3. read data from *stdout* and *stderr*, until EOF is reached;
4. wait for process to terminate.
The optional *input* argument is the data (:class:`bytes` object)
that will be sent to the child process.
@ -229,6 +230,10 @@ their completion.
Note, that the data read is buffered in memory, so do not use
this method if the data size is large or unlimited.
.. versionchanged:: 3.12
*stdin* gets closed when `input=None` too.
.. method:: send_signal(signal)
Sends the signal *signal* to the child process.