Create config file with group/world permissions revoked - #1028

I run my entire system with 077 and fully agree with this change. The patch looks good and appears to work fine, but will it cause any issues on Windows?

I run my entire system with 077 and fully agree with this change. The patch looks good and appears to work fine, but will it cause any issues on Windows?

Posix umask is also awailable on Windows: https://docs.microsoft.com/en-us/cpp/c-runtime-library/reference/posix-umask?view=msvc-160

Thanks for the patch!

Tested on windows:

• it doesn't crash
• it doesn't change permissions.

I can't find information on python's os.umask, but testing results and this commit https://git.lclutz.de/ghstars/certbot-certbot/commit/50fa04ba0cb739eb0eafec2286cb08d9caae1b16 leads me to believe it's stubbed out on windows...

More direct test:

C:\Users\IEUser>C:\gpodder-3.10.17-portable\data\bin\python
Python 3.8.9 (default, Apr  3 2021, 09:29:25)  [GCC 10.2.0 32 bit] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import os
>>> os.umask(0)
0
>>> os.umask(0o077)
0
>>> os.umask(0)
0

Also cpython tests don't assert modified persmissions on windows https://github.com/python/cpython/blob/bb3e0c240bc60fe08d332ff5955d54197f79751c/Lib/test/test_os.py#L1582

@juergenhoetzel please add a simple comment that it's a noop on windows and let's merge, to improve it on other platforms.

@juergenhoetzel please add a simple comment that it's a noop on windows and let's merge, to improve it on other platforms.

Thank you for your research. I just amended the commit and added your suggestion.

Merged, thanks!