https://bugs.freedesktop.org/show_bug.cgi?id=65933
Priority: medium
Bug ID: 65933
Assignee: [email protected]
Summary: weston-launch -u doesn't work
Severity: normal
Classification: Unclassified
OS: All
Reporter: [email protected]
Hardware: Other
Status: NEW
Version: unspecified
Component: weston
Product: Wayland
When weston-launch is used as root with the -u option to switch to a non-root
user, the supplementary group list isn't set so this user is a member of root's
group and the primary group of the user (in my situation, the group list is
"root xuser").
This doesn't work too well when permissions on /dev/dri/card0 are root:video
660, because this user isn't currently a member of video (despite /etc/group
saying otherwise). Permission denied, weston fails.
It looks like the solution on Linux would be to use getgrouplist()/setgroups()
before setgid()/setuid().
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