[dgibbs64]

Description

The OldUnreal 469 patch uses ~/.utpg as a per-user directory on Linux. Unless the server is started with -nohomedir (found in Core.so, along with SETHOMEDIR=), every ini the engine creates or saves goes to ~/.utpg/System, not serverfiles/System. This is why mutators that write their own ini (ACE, map vote, NewNet and so on) seem to write nothing: the file is created, but in ~/.utpg/System, where nobody looks. 469 also looks for inis in the home directory before System, so a copy there silently overrides the one admins edit.

The same directory also explains the large ~/.utpg seen on servers. ucc.log and the per-match ngLog stats files go to ~/.utpg/Logs and ~/.utpg/NetGamesUSA.com, while LinuxGSM's game log dir (serverfiles/Logs) stays empty and log rotation never touches them. On one long-running server this was about 544 MB (272 MB of ngLogs in each folder, 271 files), plus a User.ini the server had written there.

Changes:

• ut99server/_default.cfg: add -nohomedir to startparameters, as ut2k4 and ut3 already do.
• New pre-start fix_ut99.sh: when startparameters has -nohomedir, it moves any *.ini left in ~/.utpg/System into ${systemdir}, so existing servers keep their mutator settings and User.ini. The home copy was the one the server actually read, so it wins. A file it replaces in System (for example the stock User.ini) is kept as a numbered backup (User.ini.~1~). Once the files are moved, the fix does nothing on later starts.
• Registered in core_modules.sh and fix.sh.

Old logs in ~/.utpg/Logs and ~/.utpg/NetGamesUSA.com are not moved. Admins can delete ~/.utpg once the server has started on this version.

Backups (#5129): after this change UT99 keeps its config under serverfiles, which backup already covers, so no fn_backup_extradirs entry is needed.

Fixes #3835

Affected servers: ut99

Type of change

• Bug fix (a change which fixes an issue).
• New feature (a change which adds functionality).
• New Server (new server added).
• Refactor (restructures existing code).
• Chore (CI, workflows, tooling or other maintenance).
• Comment update (typo, spelling, explanation, examples, etc).

Testing

• Commands/tests run:
  • Fresh gameservermanagers/gameserver:ut99 container (469f RC6) on a test server, current develop. After start, ~/.utpg/System held ucc.log and ~/.utpg/Logs held the ngLog, while serverfiles/Logs was empty.
  • Started ucc-bin server with an ini= and userini= that did not exist yet. Without -nohomedir both files were created in ~/.utpg/System. With -nohomedir both were created in serverfiles/System. An strace of a normal start showed User.ini looked up in ~/.utpg/System first, then System.
  • Seeded ~/.utpg/System with a mutator-style ACE4835.ini and a modified User.ini, as an existing server would have. Then swapped in this branch's modules and _default.cfg, and ran start.
  • restart, then a direct gamedig query on the container IP, then monitor.
• Result:
  • start printed Applying move ACE4835.ini ... and Applying move User.ini .... Both files are now in serverfiles/System with their settings, and the stock User.ini was kept as User.ini.~1~ (md5 unchanged).
  • The server runs as ucc-bin server DM-Deck16][.unr ini=.../ut99server.ini -nohomedir. ucc.log is now in serverfiles/System, and new ngLogs go to serverfiles/Logs and serverfiles/NetGamesUSA.com.
  • restart applied no further moves. The query answered (LinuxGSM, DM-Deck16][, 0/10). monitor did not restart the server (start time unchanged).
  • ucc make could not be used to build a real test mutator: in 469f RC6 on Linux it recurses into ./ until the stack overflows. That is an engine bug, unrelated to this change. The ini=/userini= test exercises the same "create a new ini" path that mutators use.
• Environment used (distro/version): Ubuntu 26.04 (gameserver:ut99 image), OldUnreal UT 469f RC6.

Risk and rollback

• Risk level: low
• Rollback plan: revert this PR. Moved inis stay in serverfiles/System. 469 falls back to System when the home directory has no copy, so they keep working without -nohomedir.

Breaking changes

• No breaking changes.
• Breaking changes included (describe below).

Note: instances that override startparameters in their own config need to add -nohomedir themselves. Until they do, the fix module leaves ~/.utpg alone.

Documentation

• No documentation update required.
• User documentation update required (LinuxGSM-Docs).
• Developer documentation update required (LinuxGSM-Dev-Docs).

Checklist

PR will not be merged until all steps are complete.

• This pull request links to an issue ("Fixes", or "Related to" for a partial fix).
• This pull request uses the develop branch as its base.
• This pull request subject follows the Conventional Commits standard.
• This code follows the style guidelines of this project.
• I have performed a self-review of my code.
• I have provided a detailed enough description of this PR.

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