Fix PermissionError caused by shared /tmp/buskill.log across users

[Raihan93-coder]

Summary

This PR fixes a startup failure caused by the global /tmp/buskill.log logfile when BusKill is executed by multiple users on the same system.

Previously, BusKill initialized logging using:

os.path.join(tempfile.gettempdir(), 'buskill.log')

This created a shared logfile at /tmp/buskill.log. If BusKill was first executed by one user (for example root) and later started by another user, the second user could encounter:

PermissionError: [Errno 13] Permission denied: '/tmp/buskill.log'

Root Cause

The logfile path was globally shared across users and initialized before BusKill had created its user-specific CACHE_DIR.

Additionally, when BusKill was executed directly from source (python3 src/main.py), logger handlers were not always initialized yet, causing fallback logging initialization issues.

Changes Made

• Replaced the global /tmp/buskill.log logfile with a logfile stored inside the BusKill user cache directory:

os.path.join(buskill.CACHE_DIR, 'buskill.log')

• Added a safe fallback for cases where logger handlers are not yet initialized during direct script execution.

• Delayed fallback logfile initialization until after setupDataDir() has created a writable user-specific CACHE_DIR.

Result

BusKill can now be started by different users on the same system without logfile permission conflicts.

I tested the fix successfully with:

• root user execution
• regular user execution
• Environment : Parrot OS/Debian based system
• direct script execution using python3 src/main.py

without startup or logging errors.

[maltfield]

Hey @Raihan93-coder, thanks for the PR

Unfortunately, I realized that we don't yet have a process for contributors. I'm currently in the process of fixing that here:

• Setup CAA for Contributors #110

Please note that we also have a policy not to include contributions from AI:

• https://github.com/BusKill/buskill-app/blob/f21531dd9e5c40958520109cf6b0dcc484081fbf/CONTRIBUTING.md#ai-policy

Can you please indicate if you wrote this code yourself, or if you used AI to write this code?

[maltfield]

@Raihan93-coder can you please send us an email so we can send you the CAA?

• https://buskill.in/contact

[Raihan93-coder]

The code and the implementation ( I took inspiration from you ) is solely written by me The commenting as well as the PR request generated is done by AI ( Lazy to write 😅 )

…

On Mon, 25 May 2026, 4:34 am Michael Altfield, ***@***.***> wrote: *maltfield* left a comment (BusKill/buskill-app#109) <#109 (comment)> @Raihan93-coder <https://github.com/Raihan93-coder> can you please send us an email so we can send you the CAA? - https://buskill.in/contact — Reply to this email directly, view it on GitHub <#109 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/BLS5YWJ2NIOUIDVDGKG333L44N5Y7AVCNFSM6AAAAACZK4GMTCVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHM2DKMZQGQ2DKMRZGY> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[Raihan93-coder]

I just told AI to give me the PR after giving it my git diff command and that is how the PR was generated and the code, I don't have enough tokens for this big of a project nor CLAUDE CODE. So you can 100% trust me the code is written by me and also the fallback logic ( implementation of cache_dir only after the initialization of setupdatadir ) was found by me when I was trying to run i got error if no buskill.log file was created it led to an outofbound error in logger.root.handlers[0] which was caused as there was no writable user specific cache dir created ( so the program had to wait ✋️ )

[maltfield]

Thanks. I confirmed that @Raihan93-coder has signed the BusKill CAA.

So there's a couple issues with this PR:

1. It was made against the master branch, which is pinned to our old version. Development should be done in the dev branch in this repo.
2. Comments and PR generated by AI

Can you please create a new PR where [a] you've made the changes to the dev branch and [b] everything (including comments and the contents of the PR) are written by your hands, without using AI?

[maltfield]

replacement pr:

• Fix user-specific log file initialization #117