Bug 1130189 - Annoying message about permissions of /dev/kvm
Summary: Annoying message about permissions of /dev/kvm
Keywords:
Status: CLOSED UPSTREAM
Alias: None
Product: Virtualization Tools
Classification: Community
Component: libguestfs
Version: unspecified
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: Richard W.M. Jones
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2014-08-14 14:01 UTC by Vincent Bernat
Modified: 2014-08-24 20:33 UTC (History)
3 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2014-08-14 16:37:37 UTC


Attachments (Terms of Use)

Description Vincent Bernat 2014-08-14 14:01:27 UTC
Description of problem:

When running guestfish, I always get this message:

libguestfs: warning: current user is not a member of the KVM group (group ID 118). This user cannot access /dev/kvm, so libguestfs may run very slowly. It is recommended that you 'chmod 0666 /dev/kvm' or add the current user to the KVM group (you might need to log out and log in again).

On a modern desktop, permissions are setup by logind:

# file: dev/kvm
# owner: root
# group: kvm
user::rw-
user:bernat:rw-
group::rw-
mask::rw-
other::---

I think libguestfs should just try to open /dev/kvm (RW) and close it. If this succeeds, this means that the permissions are correct.

Version-Release number of selected component (if applicable):

1.26.7

Comment 1 Richard W.M. Jones 2014-08-14 14:18:44 UTC
Please try the patch here:

https://www.redhat.com/archives/libguestfs/2014-August/msg00119.html

Comment 2 Richard W.M. Jones 2014-08-14 16:37:37 UTC
The patch is upstream, please try it out.

Comment 3 Vincent Bernat 2014-08-14 17:21:49 UTC
Thanks, it works for me.

Comment 4 Richard W.M. Jones 2014-08-24 20:33:09 UTC
Planned to be fixed in 1.26.8.


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