Gcmbust as non-root

[Tim Wunder]

On 5/22/2002 9:45 AM, someone claiming to be Net Llama! wrote:
> On Wed, 22 May 2002, Tim Wunder wrote:
> 
>>On 5/22/2002 9:13 AM, someone claiming to be Roger Oberholtzer wrote:
>>
>>>Since xcdroast works, I would imagine that cdrecord itself has proper
>>>permissions. Still, I have to ask...
>>>
>>>Mine are:
>>>
>>>  -r-sr-sr-x  1 root  root 185948 Dec 13 13:55 /usr/bin/cdrecord
>>>
>>
>>-rws--x---   1  root  xcdwrite  265232 Apr 29 22:50 /usr/local/bin/cdrecord
> 
> 
> That's not the same as what Roger posted.  Not even close.  You can't
> execute a file that you can't read.
> 

Yes, it's not the same, I'll grant you that. He's got it readable/executable by everyone and I don't. Mine's readable and writeable by root, executable by group xcdwrite, with suid root.

Changing it's perms to -rws------ renders it not executable by me as user. Having it readable by group seems to be not relevant.

> 
>>>I had to do a 'chmod +s' myself. I don't care what the packages claim.
>>>It don't work for me without this.
>>>
>>
>>I'm a member of the xcdrwite group, sufficient for executing cdrecord with the perm's it has.
> 
> 
> Not when you can't read it.
> 

Whatever... explain to me, then, why I can run 'cdrecord --scanbus' as an ordinary user and get the correct output with those permissions. The permissions I've listed are correct (I thought maybe I transcribed something wrong). I can run it, and it lists my 2 CD devices AND my ZIP drive. I didn't feel like typing out the output, or capturing it to a file, scp'ing it here and copying it to the e-mail message.

No, permissions on cdrecord are NOT the problem. It's device permissions somewhere.