Hi

I am running slack 10.1 and running kernel-2.6.11.8 which i just finished doing, am having a problem with the permissions for the cd player.

I have seen several posts as it is actually seeing my burner its fstab is
/dev/sr0 /mnt/burner iso9660 noauto,ro,user 0 0


I thought I would try something I read in another post about this and that was to

chmod 666 /dev/sr0

Ok so it saw the cd rom then and brought up a track list but that was it Slackware froze couldn't unfreeze it ctrl+F1 ..ctrl+Esc+F1 nothing but the power off button would turn it off.

What did I do? what can I do to get the device working normally?

I don't use 2.6 kernels (yet) but I believe to have read
that since 2.6.8 ide-scsi is broken (on purpose) ... so if
the burner isn't an actual SCSI device you may want
to omit the ide-scsi and use the ATA interface ... versions
2.0.1x of cdrecord should be working with the newer
kernels.

On another note: 2.6 kernels use udev, the perms are
set on each boot according to /etc/udev

Cheers,
Tink

Tinkster,

do you have a link where we could read more about this?
So, support for SCSI devices [edit: SCSI emulation!] is going to be lost entirely? Why?

hmmm.... just found this article

http://www.reactivated.net/weblog/ar...nt-26-kernels/

SCSI won't be lost - ide-scsi emulation will... as for the
why: the kernel developers think of it as a kludge.

The link April provided pretty much states it :)


Cheers,
Tink

ok read article and understand what is happening but not not sure how to add myself(user) to the /dev/sr0 group...

I received the OK echo from root, but from my user a/c received no echo or error

root@flebslack:/home/flebber# [ -w /dev/sr0 ] && echo "OK"
OK

&

root@flebslack:/home/flebber# ls -lF /dev/sr0
brw-rw---- 1 root cdrom 11, 0 2005-05-05 00:49 /dev/sr0


So I can assume its a permissions error so how would I add myself so that user has priviledges for reading and writing.

If I edit my /etc/group file inserting user name as follows, I have but a cdrom entry, no burner or /dev/sr0 entry:

news::13:news
uucp::14:uucp
man::15:
audio::17:flebber
video::18:
cdrom::19:flebber

You'd add the users who you want to be able to burn
to the group cdrom

But you're still using the ide-scsi device?

Your burner should be something like /dev/hdd if you
don't ...



Cheers,
Tink

flebber,

I've had the same problem. It seems like no matter what I do with groups, permissions, etc..I cant get permission to burn a CD as a regular user. So after trying everything else, I finally just made a SUID wrapper program. For example, using fireburner

as root:

burner.c

+------------------------------------------------------------+
main () {
setuid (0,0) ;
system ("/usr/local/bin/fireburner") ;
}

+------------------------------------------------------------+

gcc -o burner burner.c
chmod 4755

this way at least I can burn CD's as a regular user. Even though, fireburner IS running as root, it's better than nothing!

The only advantage to this over 'sudo fireburner' is that you don't have to enter a password or edit the sudoers file. But it makes for a nice quick way for users to burn CD's

flebber,

If your drive is still being seen as /dev/sr0, remove/ comment out the line "append=hdc:ide-scsi" (or something like that) in /etc/lilo.conf, run /sbin/lilo and restart. Your drive should return to its correct designation, probably /dev/hdc or /dev/hdd

I have a Lite On LTR-52327S. The original configuration was /dev/hdc, which /dev/cdrom pointed to. If left like this, running cdrecord --scanbus found nothing. The only way to get the cdrw recognized was to append the ide-scsi to lilo.conf. In which case, the designation became /dev/sr0.

I tried adding myself to the disk group [for /dev/hdc], I tried adding myself to the cdrom group and tried adding myself to both. And I tried adding a 'burners' group, which had write access to disk and cdrom. In none of these cases was I able to burn as a regular user.

Have any of you done this and actually burned a cd as a regular user? If so, maybe you can post EXACTLY what you did step by step and your configuration. Like I said, I have tried everything, and nothing worked.

Further, when adding 'append=ide-scsi /dev/hdc' to lilo.conf, running a program like 'eject' would no longer eject the cdrw tray, because it was no longer recognized as /dev/cdrom. You had to enter 'eject /dev/sr0'

So finally, after reading everything I could find on the subject, and trying everything I mentioned, I finally added "append=ide-scsi /dev/sr0' to lilo.conf and changed /dev/cdrom to point to /dev/sr0.

This way, cdrecord --scanbus would recognize the cdrw, and 'eject' would eject the cdrw. I added the wrapper that I mentioned above, so that as a user I could launch fireburner.

So please, like i said, if any of you have actually burned a cd as a regular user, please post your config and step by step what you did to get permission to burn as a regular user! Phew....

Thanks ;-)

April,

On 2.6 kernels:

1) You don't need ide-scsi (it's broken, don't touch it) or any append lines. Get rid of all append lines for the CDRW in lilo.conf

2) Ignore --scanbus - it can't pick up IDE devices (and it even tells you it has problems with post 2.5 kernels). Doesn't mean cdrecord can't write to the device.

3) Just use the /dev/hdX name for the device (not ATAPI:0,0,1 or anything else)

e.g.

cdrecord dev=/dev/hdd some.iso

4) Permissions:

The only 'permissions' I have changed is that I am a member of cdrom.

Okay....thank you

I am actually still using the original 10.1 2.4.29 kernel, but what you said about scanbus not picking up IDE devices explains everything. I assumed that because cdrecord --scanbus could not identify the device, that it wasn't working! So all I really have to do is put back the original configuration and use /dev/hdc, and add myself to the cdrom group. cool!

One last question though, cdrdao asks you to use the format of ATAPI:0,0,0, but can you go ahead and use /dev/hdc with cdrdao, or do you still have to use the ATAPI:0,0,0 format?

I don't the append=hdc:ide-scsi line in fstab I just went and removed everything scsi from my kernel and rebuilt it in order to have it work, but I seem to have removed dma from my hard disk said on boot it will slow so I am going to have to track that down. My Fstab now reads:

# This file is edited by fstab-sync - see 'man fstab-sync' for details
/dev/hda6 swap swap defaults 0 0
/dev/hda5 / reiserfs defaults 1 1
/dev/hda1 /fat-c ntfs auto,rw,unmask=000 1 0
/dev/cdrom /mnt/cdrom iso9660 noauto,ro 0 0
/dev/hdd /mnt/burner iso9660 noauto,ro,user 0 0
/dev/fd0 /mnt/floppy auto noauto, 0 0
devpts /dev/pts devpts gid=5,mode=620 0 0
proc /proc proc defaults 0 0
none /sys sysfs defaults 0 0
user,exec,noauto,comment 0 0

And my error has now changed to this

dev/sr0 does not appear to point to a valid CD device. This may be because:
a) CD support is not present in your machine
b) You do not have the correct permissions to access the CD drive
c) /dev/sr0 is not the CD drive.

Press 'Set device' to go to a dialog where you can set the device, or press 'Quit' to quit the CD player

flebber,

Please read what I said carefully. Remove the append line from:rerun /sbin/lilo, restart. fstab has *nothing* to do with that.

/dev/sr0 problems are coming up because ide-scsi is not being used, but the append line in LILO prevents the drive from being seen as an IDE device (it caught me out the first time I upgraded to the 2.6 series).

Once that's done, find out what your CDRW/CD is being seen as and correct the /dev/sr0 entry in /etc/fstab (as I said before, it's probably /dev/hdc or /dev/hdd).