K3B was working; now cant get perms to write to device ...

stardotstar

Having been using K3B for a while to do my MP3 discs I find suddenly (no doubt after some recent emergence) I cannot burn to my CD/DVD RW
It is reporting a permisisons thing that I don't seem to see solved elsewhere.

The debug info from K3B is straightforward:

gerard27 · Posted: Sat Aug 04, 2007 9:06 am Post subject:

Hi stardotstar,
Try going to k3b>tools>k3bsetup.
You'll have to supply root password.
Once set up you shouldn't have any problem.
Gerard.
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stardotstar · Posted: Mon Aug 06, 2007 9:55 am Post subject:

It isn't so unfortunately;

I have no k3b setup in tools menu:

copy...
erase...
format...
rip various etc

and no setup in configure k3b either, no prompt for root password at any stage.

is this because I am running it on gnome?

thanks
will
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roderick · Posted: Mon Aug 06, 2007 1:10 pm Post subject:

Open a command prompt and run

darkphader · Veteran Joined: 09 May 2002 Posts: 1217 Location: Motown

The setup is in the the "Settings" menu:

Settings > Setup System Permissions...

Chris
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gerard27 · Posted: Mon Aug 06, 2007 1:54 pm Post subject:

You are right chris.My mistake.
Gerard
_________________
To install Gentoo I use sysrescuecd.Based on Gentoo,has firefox to browse Gentoo docs and mc to browse (and edit) files.
The same disk can be used for 32 and 64 bit installs.
You can follow the Handbook verbatim.
http://www.sysresccd.org/Download

darkphader · Veteran Joined: 09 May 2002 Posts: 1217 Location: Motown

I think they moved it sometime back. So it's possible we're both right...it just depends on which version you have installed.

Chris
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stardotstar · Posted: Tue Aug 07, 2007 12:43 pm Post subject:

hmmm, thanks for the replies guys but I am starting to feel rather more stupid than I normally do.

no k4bsetup in my bin paths,,, and (being a gnome user?_) I am not seeing the setup menus you speak of ...

roderick · Posted: Tue Aug 07, 2007 1:56 pm Post subject:

stardotstar · Posted: Tue Aug 07, 2007 10:51 pm Post subject:

I regularly revdep-rebuild and deep update world. Unless the use flags have changed since I was last burning with k3b that should be fine...

I can't see the setup programme you refer to (as directed)

b0b0 · n00b Joined: 18 Nov 2004 Posts: 43

You have to build k3b with the kde useflag in order to get k3bsetup.

roderick · Posted: Wed Aug 08, 2007 12:46 am Post subject:

b0b0 found it... I bet if you look at your USE flags, you must have removed kde from /etc/make.conf or /etc/portage/package.use recently (OR at least sometime since needing k3bsetup).

So, rule of thumb... when in doubt, check the ebuild. There's actualy a elog warning that gets printed if you do not have the kde use flag enabled.

b0b0 · n00b Joined: 18 Nov 2004 Posts: 43

You're welcome, but surely there is a better way to grant access to the cdrw device besides giving k3b root access? I would much rather give my user account specific permission (maybe through group permissions?) to the dvd-rw device rather than let k3b use root in order to cdrecord. What do you all think would be the safest way to do this?

Edit:
This is weird. I just added myself to the "cdrw" group, thinking this might fix the problem, but it has not.

b0b0 · n00b Joined: 18 Nov 2004 Posts: 43

Setting suid root for /usr/bin/cdrecord solves the problem, but surely there has to be a better way to do this.

stardotstar · Posted: Thu Aug 09, 2007 2:51 am Post subject:

I have set suid root for cdrecord at the moment and then look at the implications of changing my use flag for either the package or generally.

The issue being that it seems more to do with cdrecord because I found that Gnome CD Burner wouldn't work either but now it does.

strangely enough the VMWare guest can use nero.
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Tolstoi · l33t Joined: 20 May 2004 Posts: 678

As root I added

b0b0 · n00b Joined: 18 Nov 2004 Posts: 43

But surely there has to be a better way than setting cdrecord to suid root. I am in the cdrom and cdrw groups; doesn't this give me permission to write CDs?

Corona688 · Veteran Joined: 10 Jan 2004 Posts: 1204

airman · Posted: Mon Jan 21, 2008 11:27 pm Post subject:

Thanks guys. This thread solved my problem with K3b not having the proper permissions to burn a CD.

babudro · n00b Joined: 30 Sep 2005 Posts: 35 Location: Canada

The "burning" group did the trick for me. I didn't have to restart either, as Tolstoi did, just did "groupadd burning" then "usermod -a -G burning." It's such a relief to fix this problem that had me baffled. I tried all the usual things that people above recommended, but hadn't hit on this "burning" group idea until now. So thanks very much, Tolstoi!

speeddemon · Apprentice Joined: 27 Sep 2003 Posts: 162

Ok, I have the same problem now, but there is now no kde use flag for k3b (doesn't matter whether I use it or not, it doesn't pop up in the list).

nemesiss41 · n00b Joined: 24 Nov 2007 Posts: 10

Try adding yourself to the "burning" group.

speeddemon · Apprentice Joined: 27 Sep 2003 Posts: 162

penetrode · Posted: Thu Apr 17, 2008 3:55 am Post subject: Extremely bad idea

mimosinnet · Posted: Mon May 05, 2008 5:20 pm Post subject:

Thanks very much! This thread has been very helpful.

There was a permissions issue and I have follow the different steps in this thread.

What I have not tried:
* Like stardotstar, I do not have k3bsetup but I have the kde flag set, so I was unable to run k3bsetup.
* Like penetrode, I do not think it is a good idea to set cdrecord setuid root.

What I did:
Add myself to the cdrom and cdrw. Create the burning group and add myself to that group. These are the groups to which my user (perru) belongs:

# cat /etc/group | grep perru
wheel::10:root,perru
audio::18:perru,pulse
cdrom::19:haldaemon,perru
video:!:27:root,perru
cdrw::80:haldaemon,perru
users::100:games,perru
perru:x:1000:
plugdev:!:1004:haldaemon,perru
burning:x:1012:perru

Finally, this did not work till I exit and enter back to kde ;-)

My question: How is that the group 'burning' is not created by default?

Thanks to all!!! :-)