python / python/cpython

Documentation of os.exec*() provides confusing information about "flushing file descriptors"

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Description

Documentation

The documentation of os.exec*() says:

The current process is replaced immediately. Open file objects and descriptors are not flushed, so if there may be data buffered on these open files, you should flush them using sys.stdout.flush() or os.fsync() before calling an exec* function.

However, os.fsync() flushs OS buffers to disk, and has nothing to with flushing userspace buffer to OS.

Linked PRs
  • gh-133333

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Research direction

Start with the os.exec*() documentation quoted in the issue and compare the roles of sys.stdout.flush() and os.fsync(). Confirm the wording accurately distinguishes userspace buffering from OS buffers, then verify that the revised documentation clearly explains what should be flushed before exec*().

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
documentation
Issue type
Documentation
Difficulty
1/5
Estimated time
Under an hour
Activity status
Stale
Clarity
Clearly specified
Newbie friendliness
45/100

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