[3.10] GH-87235: Make sure "python /dev/fd/9 9</path/to/script.py" works on macOS (GH-99768) #99817
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…ks on macOS (pythonGH-99768) On macOS all file descriptors for a particular file in /dev/fd share the same file offset, that is ``open("/dev/fd/9", "r")`` behaves more like ``dup(9)`` than a regular open. This causes problems when a user tries to run "/dev/fd/9" as a script because zipimport changes the file offset to try to read a zipfile directory. Therefore change zipimport to reset the file offset after trying to read the zipfile directory. (cherry picked from commit d08fb25) Co-authored-by: Ronald Oussoren <ronaldoussoren@mac.com>
miss-islington
requested review from
brettcannon,
encukou,
ericsnowcurrently,
ncoghlan and
warsaw
as code owners
This was referenced Nov 27, 2022
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On macOS all file descriptors for a particular file in /dev/fd
share the same file offset, that is
open("/dev/fd/9", "r")behavesmore like
dup(9)than a regular open.This causes problems when a user tries to run "/dev/fd/9" as a script
because zipimport changes the file offset to try to read a zipfile
directory. Therefore change zipimport to reset the file offset after
trying to read the zipfile directory.
(cherry picked from commit d08fb25)
Co-authored-by: Ronald Oussoren ronaldoussoren@mac.com
/dev/fd/X#87235