[Linux] Location for logs and UE4 environment vars

Development Programming & Scripting
1

Hi,

Is it possible to change the default log directory using en environment variable?

It seems to create ~/Library/Logs/Unreal Engine/LocalBuildLogs/Cook.*.txt

but I’d like to put logs in a custom location, for archiving and monitoring.

*** Moreover, is there a listing of all the possible Linux environment vars that can be understood by UE4

Thanks!

2

That log location is specified in RunUAT.sh which is shared between Mac and Linux.

As for the env vars, there aren’t any relevant I remember of off the top of my head. Some third-party software (UELinuxNativeDialogs) has vars like LND_BACKEND, and SDL perhaps recognizes a bunch of vars, but we are not using them to control engine behavior in general, preferring commandline switches and .ini settings.

3

There’s a pending pull request on Unreal’s GitHub repository that makes Unreal write its logs into the more appropriate ~/.local directory:
https://github.com/EpicGames/UnrealEngine/pull/10138

Until it’s merged (if it gets merged), just replace the #run UAT section in your engine’s Engine/Build/BatchFiles/RunUAT.sh file with the section from the linked pull request and run the UnrealEditor binary file as usual - the change will be picked up automatically.

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