René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Handle not executable directories for `os.listdir`","articleBody":"# Bug report\r\n\r\n### Bug description:\r\n\r\nI have a directory with \"rw-\" permisions with a file `inaccessible.txt`:\r\n\r\n```python\r\n\u003e\u003e\u003e import os\r\n\u003e\u003e\u003e os.listdir(\"directory\")\r\n['inaccessible.txt']\r\n\u003e\u003e\u003e os.path.exists(\"directory/inaccessible.txt\")\r\nFalse\r\n```\r\n\r\nThat's inconsistent behaviour: `os.listdir` says `directory/inaccessible.txt` exists, while `os.path.exists` says it does not.\r\nThis can be solved simply be raising a `PermissionError` (or a subclass) for `os.listdir` when the directory is not executable.\r\nI can't think of any situation outside of a CTF where it would be useful to be able to list the files in such directories.\r\n\r\n_Note that this is different from a directory with \"-wx\" permisions with a file `secret.txt`:_\r\n\r\n```python\r\n\u003e\u003e\u003e import os\r\n\u003e\u003e\u003e os.listdir(\"directory\")\r\nTraceback (most recent call last):\r\n  File \"\u003cstdin\u003e\", line 1, in \u003cmodule\u003e\r\nPermissionError: [Errno 13] Permission denied: 'directory'\r\n\u003e\u003e\u003e os.path.exists(\"directory/secret.txt\")\r\nTrue\r\n```\r\n\r\n_In this case, files can still be accessed if you know the filename._\r\n\r\n### CPython versions tested on:\r\n\r\n3.12\r\n\r\n### Operating systems tested on:\r\n\r\nmacOS","author":{"url":"https://github.com/nineteendo","@type":"Person","name":"nineteendo"},"datePublished":"2024-03-31T11:58:41.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":3},"url":"https://github.com/117402/cpython/issues/117402"}