OSError：不允许操作 os.setegid

Question

I get an "operation not permitted" traceback with trying to use os.setegid(). I've found a few answers to similar questions to this one, but the questions are more complicated than my case, and the answers presume the users did a setuid first, or suggest setting the setgid bit on the directory.

This issue is much simpler. I'm just doing a os.setegid with group id that I am a member of. In the shell I can use sg(), newgrp(), or chgrp() with the same group successfully. Why does this python command fail?

>>> import os
>>> os.setegid(34007)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
OSError: [Errno 1] Operation not permitted
>>> 

I am using RHEL7 and an older version of python (2.7.5) but the same error occurs with python 3.6.10, though in that case it's a PermissionError rather than an OSError.

Answer 1

Ensure you're running as root.

https://www.geeksforgeeks.org/python-os-getegid-and-os-setegid-method/

...method is typically available only to the superuser. Superuser means a root user or an administrative user who has all the permissions to run or execute any program in the operating system