Mount /cdrom as non-root user - does this actually work for anyone?

[Tom McLaughlin]

On Sun, 2004-01-04 at 08:31, Stacey Roberts wrote:
> Hello,
>     Thanks for the reply.
> 
> ----- Original Message -----
> From: "Tom McLaughlin <tmclaugh at sdf.lonestar.org>"
> To: To Stacey Roberts
> Date: Sun, 04 Jan, 2004 05:48 GMT
> Subject: Re: Mount /cdrom as non-root user - does this actually work for anyone?
> 
> > On Sat, 2004-01-03 at 20:13, Stacey Roberts wrote:
> > > Hello,
> > >      Thanks for the reply..,
> > > 
> > > ----- Original Message -----
> > > From: "Gautam Gopalakrishnan <ggop at madras.dyndns.org>"
> > > To: To Stacey Roberts
> > > Date: Sun, 04 Jan, 2004 00:59 GMT
> > > Subject: Re: Mount /cdrom as non-root user - does this actually work for anyone?
> > > 
> > > > On Sun, Jan 04, 2004 at 12:53:52AM +0000, Stacey Roberts wrote:
> > > > > Hello,
> > > > > As root I can mount and read the CD fine.., checking for non-root user:
> > > > > exit
> > > > > ~ $ mount /cdrom
> > > > > cd9660: /dev/acd0c: Operation not permitted
> > > > > ~ $ mount -t cd9660 /dev/acd0c ~/cdrom
> > > > > cd9660: /dev/acd0c: Operation not permitted
> > > > > ~ $
> > > > > 
> > > > > Attempting to mount to mount-point in user home dir:
> > > > > ~ $ cd ~
> > > > > ~ $ pwd
> > > > > /home/stacey
> > > > > ~ $ ls -ltra cdrom
> > > > > total 6
> > > > > drwxr-xr-x 2 stacey stacey 512 Jan 3 23:50 ./
> > > > > drwxr-xr-x 31 stacey stacey 2560 Jan 3 23:50 ../
> > > > > ~ $ mount -t cd9660 /dev/acd0c ~/cdrom
> > > > > cd9660: /dev/acd0c: Operation not permitted
> > > > > ~ $
> > > > 
> > > > chmod +s /sbin/umount /sbin/mount
> > > > 
> > > > works fine for me (without any other changes necessary). Don't know
> > > > if it's the recommended procedure though.
> > > > 
> > > 
> > > Nor I, to be honest.., I'm not sure about setting the suid bit on mount.., Given that the HandBook provides what I thought would have been straight-forward instructions on what (presumably) is I hoped is a simple procedure.., I'd not want to start making undocumented config changes.
> > > 
> > > Thanks all the same for taking the time to respond.
> > > 
> > > Regards,
> > > 
> > > Stacey
> > > 
> > > > Gautam
> > > > 
> > 
> > Stacey, what are permissions of /dev/acd0c?  The handbook example
> > changes the permissions of a SCSI cdrom.  I made the mistake of not
> > noticing this when I first tried to do make my cdrom user mountable.
> > 
> 
> $ ls -la /dev/acd*
> crw-r-----  4 root  operator  117,   0 Nov  9 14:21 /dev/acd0a
> crw-r-----  4 root  operator  117,   0 Nov  9 14:21 /dev/acd0c
> $
> 
> That's what the permissions are like after running through the procedure in the HandBook. On that note, fr the record, on all machines, there are IDE CDROM drives and one IDE CD-RW drive that I've got here.
> 
> Thanks again.
> 
> Regards,
> 
> Stacey
> 
> > Tom
> > 

Stacey, do `chmod 666 /dev/acd0c`.  That will give the first IDE cdrom
drive the correct permissions.  You should be able to pop in a disk and
mount it in your directory then.

[tom at compass tom]$ ls -al /dev/acd*
crw-rw-rw-  4 root  operator  117,   0 Dec 18 00:53 /dev/acd0a
crw-rw-rw-  4 root  operator  117,   0 Dec 18 00:53 /dev/acd0c
...
crw-rw-rw-  4 root  operator  117,   8 Dec 18 00:53 /dev/acd1a
crw-rw-rw-  4 root  operator  117,   8 Dec 18 00:53 /dev/acd1c


Tom