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GH-126606: don't write incomplete pyc files (GH-126627)

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Co-authored-by: Kirill Podoprigora <kirill.bast9@mail.ru>
Co-authored-by: Brett Cannon <brett@python.org>
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CF Bolz-Tereick 2024-11-13 22:39:10 +01:00 • committed by GitHub
parent f6b0361c17
commit c695e37a3f
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3 changed files with 40 additions and 1 deletions
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6
Lib/importlib/_bootstrap_external.py
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@ -209,7 +209,11 @@ def _write_atomic(path, data, mode=0o666):
# We first write data to a temporary file, and then use os.replace() to
# perform an atomic rename.
with _io.FileIO(fd, 'wb') as file:
file.write(data)
bytes_written = file.write(data)
if bytes_written != len(data):
# Raise an OSError so the 'except' below cleans up the partially
# written file.
raise OSError("os.write() didn't write the full pyc file")
_os.replace(path_tmp, path)
except OSError:
try: