can't add tun device to bridge as user

From: Terry Kemp (tkemp_at_mer-med.com)
Date: 06/29/05

  • Next message: Ernie McCracken: "Re: FC4 and vmware workstation 5" 
    To: For users of Fedora Core releases <fedora-list@redhat.com>
Date: Thu, 30 Jun 2005 09:57:56 +1200

    When starting QEMU, I am having problems configuring the tun device
    (tun0) as a user. Qemu runs the /etc/qemu-ifup script (as root?) which
    configures and then adds the tun device to the bridged eth0 device.
    It works as root, and worked in FC3 once I changed permissions on
    the /dev/net/tun device.

    [tkemp@systems-fc4 ~]$ ls -al /dev/net/tun
    crw-rw-rw- 1 root qemu 10, 200 Jun 24 00:36 /dev/net/tun

    [tkemp@systems-fc4 qvm]$ cat /etc/qemu-ifup
    #!/bin/sh
    /sbin/ifconfig $1 0.0.0.0 promisc up
    /usr/sbin/brctl addif br0 $1
    [tkemp@systems-fc4 qvm]$ ./startxp
    Connected to host network interface: tun0
    SIOCSIFADDR: Permission denied
    SIOCSIFFLAGS: Permission denied
    SIOCSIFFLAGS: Permission denied
    SIOCSIFFLAGS: Permission denied
    can't add tun0 to bridge br0: Operation not permitted
    /etc/qemu-ifup: could not launch network script

    [tkemp@systems-fc4 ~]$ ls -al /usr/sbin/brctl
    -rwxr-xr-x 1 root qemu 23912 Mar 3 03:36 /usr/sbin/brctl

    I tried adding a 'qemu' group and adding myself to that but am not
    having any luck. setenforce 0 doesn't help.

    What is locking me out?

    Terry 

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