[issue15723] Python breaks OS' append guarantee on file writes

[Poul-Henning Kamp]

Poul-Henning Kamp added the comment:

Yes, it does:

If the O_APPEND flag of the file status flags is set, the file offset shall be set to the end of the file prior to each write and no intervening file modification operation shall occur between changing the file offset and the write operation.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue15723>
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