[ARROW-16753] [C++] LocalFileSystem cannot list Linux directory recursively when permission to subdirectory contents are denied

• Type: Bug
• Status: In Progress
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 6.0.1
• Component/s: C++
• Labels: good-second-issue pull-request-available
• Environment: Ubuntu 20.04 LTS
• External issue URL: https://github.com/apache/arrow/issues/32089
• Assignee: Unassigned
• Reporter: David Rauschenbach
• Created: 06/Jun/22 14:11
• Updated: 11/Jan/23 11:46

Description

The following code to list my root directory fails:

 

FileSelector file_selector;
file_selector.base_dir = "/";
file_selector.allow_not_found = true;
file_selector.recursive = true;
auto result = fs.GetFileInfo(file_selector);

The result.ok() value returns false, and then result.status().message() returns Cannot list directory '/var/run/wpa_supplicant'.

An examination of the /run directory (which /var/run symlinks to) shows:

 

$ ls -al /run
drwxr-xr-x 35 root              root  1040 Jun  6 06:11 .
drwxr-xr-x 20 root              root  4096 May 20 12:42 ..
...
drwxr-x---  2 root              root    60 Jun  4 12:14 wpa_supplicant

And then attempting to list this directory reveals:

 

$ ls -al /run/wpa_supplicant/
ls: cannot open directory '/run/wpa_supplicant/': Permission denied

 

As a user of LocalFileSystem, I should be able to list all of the files that I have access to.

 

 

Issue Links

• links to: GitHub Pull Request #13435