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3a31a7d886
On macOS when using a become plugin as an unprivileged user, to another
unprivileged user it is likely that the current working directory can't be
read. In this case os.cwd() raises PermissionError.
On versions of Python currently in the wild (March 2024, CPython <= 3.13) if
any non-builtin or non-frozen module (e.g. zlib, base64) is imported then
`importlib._bootstrap_external.PathFinder._path_importer_cache()` attempts to
call os.cwd() without catching PermissionError.
The previous comment about needing an extra .encode() appears to be wrong,
atleast for Python 3.x >= 3.6.
Command size increased by 54 bytes, bootstrap by 804 bytes. Changed from
codecs module to binascii & zlib because they're extensions, and importing
them triggers fewer supporting imports (e.g. encodings module).
Before
```
✗ ./preamble_size.py
SSH command size: 705
Bootstrap (mitogen.core) size: 17078 (16.68KiB)
Original Minimized Compressed
mitogen.parent 97884 95.6KiB 50515 49.3KiB 51.6% 12727 12.4KiB
13.0%
mitogen.fork 8436 8.2KiB 4130 4.0KiB 49.0% 1648 1.6KiB
19.5%
mitogen.ssh 10892 10.6KiB 6952 6.8KiB 63.8% 2113 2.1KiB
19.4%
mitogen.sudo 12089 11.8KiB 5924 5.8KiB 49.0% 2249 2.2KiB
18.6%
mitogen.select 12325 12.0KiB 2929 2.9KiB 23.8% 964 0.9KiB
7.8%
mitogen.service 41699 40.7KiB 22477 22.0KiB 53.9% 5885 5.7KiB
14.1%
mitogen.fakessh 15577 15.2KiB 7989 7.8KiB 51.3% 2623 2.6KiB
16.8%
mitogen.master 51398 50.2KiB 25715 25.1KiB 50.0% 6886 6.7KiB
13.4%
```
After
```
✗ ./preamble_size.py
SSH command size: 759
Bootstrap (mitogen.core) size: 17882 (17.46KiB)
Original Minimized Compressed
mitogen.parent 98173 95.9KiB 50571 49.4KiB 51.5% 12747 12.4KiB
13.0%
mitogen.fork 8436 8.2KiB 4130 4.0KiB 49.0% 1648 1.6KiB
19.5%
mitogen.ssh 10892 10.6KiB 6952 6.8KiB 63.8% 2113 2.1KiB
19.4%
mitogen.sudo 12089 11.8KiB 5924 5.8KiB 49.0% 2249 2.2KiB
18.6%
mitogen.select 12325 12.0KiB 2929 2.9KiB 23.8% 964 0.9KiB
7.8%
mitogen.service 41699 40.7KiB 22477 22.0KiB 53.9% 5885 5.7KiB
14.1%
mitogen.fakessh 15577 15.2KiB 7989 7.8KiB 51.3% 2623 2.6KiB
16.8%
mitogen.master 56116 54.8KiB 29427 28.7KiB 52.4% 7627 7.4KiB
13.6%
```
Fixes #885
Refs https://github.com/python/cpython/issues/115911
|
3 months ago | |
|---|---|---|
| .. | ||
| _static | 5 years ago | |
| _templates | 10 months ago | |
| images | 5 years ago | |
| .gitignore | 6 years ago | |
| Makefile | 6 years ago | |
| ansible_detailed.rst | 10 months ago | |
| api.rst | 3 years ago | |
| changelog.rst | 3 months ago | |
| conf.py | 7 months ago | |
| contributors.rst | 5 years ago | |
| domainrefs.py | 5 years ago | |
| examples.rst | 2 years ago | |
| getting_started.rst | 5 years ago | |
| howitworks.rst | 3 years ago | |
| index.rst | 10 months ago | |
| internals.rst | 5 years ago | |
| pickle-substitutes.ods | 6 years ago | |
| requirements.txt | 10 months ago | |
| services.rst | 5 years ago | |
| toc.rst | 5 years ago | |