| @@ -380,15 +380,24 @@ def __get__(self, instance, owner=None): |
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def get_user_id() -> int | None: |
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-"""Return the current user id, or None if we cannot get it reliably on the current platform.""" |
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-# win32 does not have a getuid() function. |
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-# On Emscripten, getuid() is a stub that always returns 0. |
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-if sys.platform in ("win32", "emscripten"): |
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+"""Return the current process's real user id or None if it could not be |
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+ determined. |
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+ |
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+ :return: The user id or None if it could not be determined. |
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+ """ |
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+# mypy follows the version and platform checking expectation of PEP 484: |
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+# https://mypy.readthedocs.io/en/stable/common\_issues.html?highlight=platform#python-version-and-system-platform-checks |
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+# Containment checks are too complex for mypy v1.5.0 and cause failure. |
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+if sys.platform == "win32" or sys.platform == "emscripten": |
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+# win32 does not have a getuid() function. |
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+# Emscripten has a return 0 stub. |
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return None |
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-# getuid shouldn't fail, but cpython defines such a case. |
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-# Let's hope for the best. |
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-uid = os.getuid() |
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-return uid if uid != -1 else None |
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+else: |
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+# On other platforms, a return value of -1 is assumed to indicate that |
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+# the current process's real user id could not be determined. |
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+ERROR = -1 |
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+uid = os.getuid() |
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+return uid if uid != ERROR else None |
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# Perform exhaustiveness checking. |