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GH-87235: Make sure "python /dev/fd/9 9</path/to/script.py" works on macOS - #99768
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ronaldoussoren merged 3 commits intoNov 27, 2022
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…ks on macOS
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.ronaldoussoren
requested review from
brettcannon, encukou, ericsnowcurrently, ncoghlan and warsaw
as code ownersNovember 25, 2022 09:18
| # to not cause problems when some runs 'python3 /dev/fd/9 9<some_script' | ||
| start_offset = fp.tell() | ||
| try: | ||
| fp.seek(-END_CENTRAL_DIR_SIZE, 2) |
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The PR looks messy here. I just indented the body of "with fp" one level deeper to add the code to reset the file offset, that is:
start_offset=fp.tell()
try:
<ORIGINALCODE>finally:
fp.seek(start_offset)brettcannon
requested review from
serhiy-storchaka
and removed request for
brettcannonNovember 25, 2022 19:07
serhiy-storchaka
approved these changes
Nov 26, 2022
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It looks like a hack to me, but I do not know a better solution.
miss-islington
commented
Nov 27, 2022
Contributor
Thanks @ronaldoussoren for the PR 🌮🎉.. I'm working now to backport this PR to: 3.10, 3.11. |
bedevere-bot
commented
Nov 27, 2022
GH-99816 is a backport of this pull request to the 3.11 branch. |
miss-islington pushed a commit
to miss-islington/cpython
that referenced
this pull request
Nov 27, 2022
…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 pushed a commit
to miss-islington/cpython
that referenced
this pull request
Nov 27, 2022
…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>
bedevere-bot
commented
Nov 27, 2022
GH-99817 is a backport of this pull request to the 3.10 branch. |
miss-islington added a commit
that referenced
this pull request
Nov 27, 2022
…macOS (GH-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>
ambv added a commit
that referenced
this pull request
Mar 28, 2023
…rks on macOS (GH-99768) (#99817) 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> * Regen zipimport --------- Co-authored-by: Ronald Oussoren <ronaldoussoren@mac.com> Co-authored-by: Shantanu <12621235+hauntsaninja@users.noreply.github.com> Co-authored-by: Łukasz Langa <lukasz@langa.pl>
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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")behaves more likedup(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.
/dev/fd/X#87235