File attribute dialog displays every user and group (except for the current user) twice in the dropdowns (macOS)

[sirburpalot]

File attribute dialog displays every user and group (except for the current user) twice in the dropdowns (macOS)

[exkrexpexfex]

Far seems to use getpwent() when generating the list
Simple test on latest MacOS

	while ((pw = getpwent()) != NULL)
		std::cout << pw->pw_name << " " << pw->pw_uid << "\n";`

shows duplicates when output is sorted

daemon 1
daemon 1
nobody 4294967294
nobody 4294967294
root 0
root 0

Documentation man getpwent states that the information is obtained from opendirectoryd
With fairly default configuration with no external directories added

% odutil show nodenames             
Nodenames:

Name              State  Refs Type External Locked Hidden 
----------------- ------ ---- ---- -------- ------ ------ 
/Active Directory Online 1                  X      X      
/Configure        Online 1                  X      X      
/Contacts         Online 3                                
/LDAPv3           Online 1                  X      X      
/Local            Online 2                  X      X      
/Local/Default    Online 63                 X             
/Platform SSO     Online 1                  X             
/Search           Online 26                               

username nobody is found in two locations

 % dscl localhost -list /Search/Users |grep nobody
nobody
 % dscl localhost -list /Local/Default/Users |grep nobody
nobody

That's probably the source of duplicates on Mac.
Also FreeBSD man page for getpwent explicitly states "The getpwent() and getpwent_r() functions make
no attempt to suppress duplicate information if multiple sources are
specified in nsswitch.conf(5)"
So the issue is not Mac-specific. It seems to be good to remove duplicates from the list obtained from getpwent