Here's something interesting I found in the man page for openat (2): it appears that it would retrun EACCES for file permission errors. EPERM is something different, with two possible causes.

Environment details OS type and version: Ubuntu 22.04.4 LTS Python version: python --version 3.11.3 pip version: pip --version 24.2 google-cloud-storage version: pip show google-cloud-storage 2.14.0 ...