gh-96005: Handle WASI ENOTCAPABLE in getpath (GH-96006)

[tiran]

• On WASI ENOTCAPABLE is now mapped to PermissionError.
• The errno modules exposes the new error number.
• getpath.py now ignores PermissionError when it cannot open landmark
  files pybuilddir.txt and pyenv.cfg.

• Issue: [WASI] getpath.py does not handle "Capabilities insufficient" (ENOTCAPABLE) #96005

[zooba]

LGTM

[tiran]

@pablogsal RM, is this an acceptable change for 3.11.0, should I delay it for 3.11.1, or only apply it to 3.12?

[pablogsal]

@pablogsal RM, is this an acceptable change for 3.11.0, should I delay it for 3.11.1, or only apply it to 3.12?

This is likely too big for 3.11.0 :( are you ok delaying this to 3.11.1?

[tiran]

This is likely too big for 3.11.0 :( are you ok delaying this to 3.11.1?

Sure, no problem! I'll update the docs.

[miss-islington]

Thanks @tiran for the PR 🌮🎉.. I'm working now to backport this PR to: 3.11.
🐍🍒⛏🤖

[bedevere-bot]

GH-96032 is a backport of this pull request to the 3.11 branch.

[bedevere-bot]

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot AMD64 FreeBSD Non-Debug 3.x has failed when building commit 48174fa.

What do you need to do:

1. Don't panic.
2. Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
3. Go to the page of the buildbot that failed (https://buildbot.python.org/all/#builders/172/builds/2715) and take a look at the build logs.
4. Check if the failure is related to this commit (48174fa) or if it is a false positive.
5. If the failure is related to this commit, please, reflect that on the issue and make a new Pull Request with a fix.

You can take a look at the buildbot page here:

https://buildbot.python.org/all/#builders/172/builds/2715

Failed tests:

• test_exception_hierarchy

Failed subtests:

• test_errno_mapping - test.test_exception_hierarchy.HierarchyTest.test_errno_mapping

Summary of the results of the build (if available):

== Tests result: FAILURE then FAILURE ==

415 tests OK.

10 slowest tests:

• test_multiprocessing_spawn: 4 min 27 sec
• test_concurrent_futures: 3 min 15 sec
• test_asyncio: 2 min 49 sec
• test_unparse: 2 min 24 sec
• test_tokenize: 1 min 58 sec
• test_multiprocessing_forkserver: 1 min 53 sec
• test_venv: 1 min 48 sec
• test_multiprocessing_fork: 1 min 43 sec
• test_capi: 1 min 36 sec
• test_gdb: 1 min 21 sec

1 test failed:
test_exception_hierarchy

19 tests skipped:
test_dbm_gnu test_devpoll test_epoll test_idle test_ioctl
test_launcher test_msilib test_spwd test_startfile test_tcl
test_tix test_tkinter test_ttk test_ttk_textonly test_turtle
test_winconsoleio test_winreg test_winsound test_zipfile64

1 re-run test:
test_exception_hierarchy

Total duration: 15 min 56 sec

Click to see traceback logs

Traceback (most recent call last):
  File "/usr/home/buildbot/python/3.x.koobs-freebsd-9e36.nondebug/build/Lib/test/test_exception_hierarchy.py", line 94, in test_errno_mapping
    self.assertIs(type(e), OSError)
AssertionError: <class 'PermissionError'> is not <class 'OSError'>

[pablogsal]

@tiran That looks like a genuine failure

[tiran]

Will investigate later