Bug 179655

Summary:	sys-fs/udev needs a net group
Product:	Gentoo Linux	Reporter:	Matthew Schultz <mattsch>
Component:	New packages	Assignee:	Gentoo Linux bug wranglers <bug-wranglers>
Status:	RESOLVED CANTFIX
Severity:	enhancement
Priority:	High
Version:	unspecified
Hardware:	All
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---

Description Matthew Schultz 2007-05-24 15:49:44 UTC

I am proposing adding a new group to the udev rules for the net interfaces.  The reason I am requesting this is because when you want to run a program like qemu as a regular user, you are unable to bring up a network interface (tap device on a bridge) without having to change the permissions of /dev/net/tun.  

Reproducible: Always

Steps to Reproduce:
1. Run qemu as a regular user
2. Have qemu attempt to bring up a tap interface on a bridge
3. Access Problem.

Actual Results:  
warning: could not open /dev/net/tun: no virtual network emulation
Could not initialize device 'tap'


Expected Results:  
Interface would come up if the user belonged to the new "net" group.  Here's an example of a device in /dev/net:

crw-rw---- 1 root net 10, 200 May 24 09:48 /dev/net/tun

Comment 1 Matthew Schultz 2007-05-24 18:32:39 UTC

After some more researching, it looks like this is not an issue.  It seems that there are some abilities in libcap (set CAP_NET_ADMIN on the binary) that don't exist yet and is causing problems with qemu and tap/tun interfaces running under regular user.