/dev/hdc file permissions Questions
Paul Howarth
paul at city-fan.org
Wed Mar 9 07:19:12 UTC 2005
On Wed, 2005-03-09 at 16:07 +0900, Mark Sargent wrote:
> Mark Sargent wrote:
>
> > Hi All,
> >
> > sometimes I load a scsi cd-rw at boot. It's always loaded as /dev/hdc.
> > I have a coupla Qs about permissions etc. When it's loaded each time,
> > does the file /dev/hdc permissions get altered each time.? I ask this,
> > because, 2 dys ago, I changed the permissions of the file to 666, so
> > as to allow K3b to burn in root mode. This is because the burn process
> > stops mid burn with a 254 error stating cdrecord is not being run with
> > root priviliges. But, the permissions are back as 600 today. I would
> > have thought the file's permissions stay changed despite the loading
> > or not of a block device to that file.? Am I wrong..?
> >
> Hi All,
>
> just to delve into this a little more; what are the default udev
> permissions/ownership for /dev/hdc /dev/scd0.? I get the following,
>
> [root at localhost dev]# ls -alh hdc scd0
> brw------- 1 coolboarderguy disk 22, 0 Mar 9 2005 hdc
> brw------- 1 coolboarderguy disk 11, 0 Mar 9 2005 scd0
>
> Shouldn't they be owned by root..? If no, then I get problems with
> cdrecorder/K3b. Burning stops mid-burn and gives the 254 error saying
> that cdrecorder is not with root priviliges. Little confused. Cheers.
You'll find there's a symlink created by udev:
/dev/cdwriter -> hdc
The device pointed to by this symlink will be owned by the currently-
logged-in user, so that they can access the device.
See /etc/security/console.perms
The idea is to support cd burning as a non-root user, but it appears
that this isn't working...
Paul.
--
Paul Howarth <paul at city-fan.org>
More information about the users
mailing list