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Clarify run_process Ctrl+C documentation #3486

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Clarify run_process Ctrl+C documentation #3486

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10 changes: 6 additions & 4 deletions src/trio/_subprocess.py
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Expand Up @@ -663,10 +663,12 @@ async def my_deliver_cancel(process):
which is deprecated, then single exceptions will be collapsed.

.. note:: The child process runs in the same process group as the parent
Trio process, so a Ctrl+C will be delivered simultaneously to both
parent and child. If you don't want this behavior, consult your
platform's documentation for starting child processes in a different
process group.
Trio process, so a Ctrl+C will normally be delivered to both parent
and child.

Python's ``subprocess`` API provides platform-specific options such as
``process_group`` and ``start_new_session`` to control how child
processes are started.

"""

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