Sudoers files that contain group names with spaces in their name don't work (illegal escape sequence)

[parapente]

Describe the bug
I have some ubuntu workstations connected to an active directory domain controller and I have created some sudoers files in /etc/sudoers.d/ to give some extra permissions to the users of the group "Domain Admins". Testing sudo-rs I am no longer able to use those files as I get an error when parsing them (illegal escape sequence).

To Reproduce
Steps to reproduce the behavior:

1. Create a sudoers file /etc/sudoers.d/domain-admins with the line:

%Domain\ Admins ALL=(ALL:ALL) NOPASSWD:ALL

2. Run sudo -i
3. See error:

/etc/sudoers.d/domain-admins:1:9: illegal escape sequence
%Domain\ Admins ALL=(ALL:ALL) NOPASSWD:ALL
        ^

Expected behavior
To open root shell

Environment (please complete the following information):

• Ubuntu 25.10
• sudo-rs 0.2.8

Additional context
Using group id works as expected via %#2000512 ALL=(ALL:ALL) NOPASSWD:ALL

[squell]

Thanks for the bug report! This case was missed when working on #17. The fix should be easy.

Another work-around which is probably easier for you is to use quoting: "%Domain Admins" should work.

[parapente]

@squell thank you for the immediate response! I tried %"Domain Admins" (which of course didn't work) but didn't think to include the percentage sign inside the quotes 😄