Set supplementary groups for non-root job processes (#107)#108
Merged
shiv-tyagi merged 1 commit intomainfrom Apr 19, 2026
Merged
Set supplementary groups for non-root job processes (#107)#108shiv-tyagi merged 1 commit intomainfrom
shiv-tyagi merged 1 commit intomainfrom
Conversation
Call initgroups() in pre_exec to inherit supplementary groups (video, render, etc.) when running jobs as non-root users. Without this, GPU device nodes (/dev/dri, /dev/kfd) are inaccessible because they require video/render group membership. Fixes #107 Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Summary
Fixes #107 — calls
initgroups()inpre_execso non-root job processes inherit supplementary groups (video, render, etc.) needed for GPU device access.Problem
Command::uid().gid()only sets primary UID/GID. GPU devices are typicallyroot:videoorroot:render. Without supplementary groups, non-root jobs get EACCES on/dev/driand/dev/kfd.Fix
Added
libc::initgroups(username, gid)call inpre_execbefore the process execs. This reads/etc/groupand sets all supplementary groups the user belongs to.Test plan
idshows video/render groupsrocm-smiworks inside non-root jobstat /dev/kfdaccessible inside non-root job🤖 Generated with Claude Code