[Bug 1611603] Re: fails to start when confined in a snap
Ubuntu Foundations Team Bug Bot
1611603 at bugs.launchpad.net
Wed Aug 10 08:28:41 UTC 2016
The attachment "skip chown when it would be a no-op" seems to be a
patch. If it isn't, please remove the "patch" flag from the attachment,
remove the "patch" tag, and if you are a member of the ~ubuntu-
reviewers, unsubscribe the team.
[This is an automated message performed by a Launchpad user owned by
~brian-murray, for any issues please contact him.]
** Tags added: patch
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https://bugs.launchpad.net/bugs/1611603
Title:
fails to start when confined in a snap
Status in gunicorn package in Ubuntu:
New
Bug description:
I attempted to package a simple WSGI app in an Ubuntu snap with
gunicorn, and ran into a problem with gunicorn vs. the Snap security
policy.
The policy forbids calling chown at all, whereas the
workers.workertmp.WorkerTmp class relies on the default and
historically unproblematic behaviour of silently succeeding when the
UID/GID are the same as the calling process's.
I've attached a patch that attempts to short-circuit chown when it
would be a no-op, which is the case when gunicorn is run as root in a
snap, and this patch lets my app work when confined.
snaps also do not currently allow setuid, etc., and so there's no sense in trying to create a gunicorn-using snap that starts as root and then drops privileges. For more information on the snap security policy, please visit: https://developer.ubuntu.com/en/snappy/guides/security/
and https://developer.ubuntu.com/en/snappy/build-apps/debug/
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