Bug 455022 - Can't access /dev/sr0, /dev/cdrom, /dev/sr1, etc. to write DVD .... Works as root.
Can't access /dev/sr0, /dev/cdrom, /dev/sr1, etc. to write DVD .... Works as...
Product: Fedora
Classification: Fedora
Component: hal (Show other bugs)
All Linux
low Severity medium
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Assigned To: David Zeuthen
Fedora Extras Quality Assurance
Depends On:
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Reported: 2008-07-11 10:45 EDT by Tom London
Modified: 2013-03-05 22:56 EST (History)
4 users (show)

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Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Last Closed: 2009-08-12 12:34:33 EDT
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description Tom London 2008-07-11 10:45:27 EDT
Description of problem:
[Sorry if this BZ needs to be re-directed....]

If I try to write to a blank DVD from desktop, I get failure popup/message.

If I try to write to a blank DVD from console via "dvdrecord -v dev=/dev/cdrom
*.iso" or "dvdrecord -v dev=/dev/sr0 *.iso", I get:

[tbl@localhost Downloads]$ dvdrecord -v dev=/dev/cdrom *.iso
dvdrecord: No write mode specified.
dvdrecord: Asuming -tao mode.
dvdrecord: Future versions of wodim may have different drive dependent defaults.
TOC Type: 1 = CD-ROM
dvdrecord: Operation not permitted. Warning: Cannot raise RLIMIT_MEMLOCK
limits.scsidev: '/dev/cdrom'
devname: '/dev/cdrom'
scsibus: -2 target: -2 lun: -2
dvdrecord: Permission denied. 
Cannot open SCSI driver!
For possible targets try 'wodim --devices' or 'wodim -scanbus'.
For possible transport specifiers try 'wodim dev=help'.
For IDE/ATAPI devices configuration, see the file README.ATAPI.setup from
the wodim documentation.
[tbl@localhost Downloads]$ 

Works if I run one of the above commands as root.

[tbl@localhost Downloads]$ getfacl /dev/sr0
getfacl: Removing leading '/' from absolute path names
# file: dev/sr0
# owner: root
# group: disk
user:tbl:rw-			#effective:r--

[tbl@localhost Downloads]$ 

Version-Release number of selected component (if applicable):

How reproducible:
Every time

Steps to Reproduce:
Actual results:

Expected results:

Additional info:
Comment 1 Tom London 2008-07-17 20:01:44 EDT
Also works if I 'chmod 666 /dev/sr0' ....
Comment 2 Bug Zapper 2008-11-25 21:32:38 EST
This bug appears to have been reported against 'rawhide' during the Fedora 10 development cycle.
Changing version to '10'.

More information and reason for this action is here:
Comment 3 Jörg Schilling 2009-02-10 10:22:37 EST
You are suffering from a problem that is a result from
using a defactive fork instead of original software.
The people behind the defective fork do not like to
admit that root privileges are needed in order to let
cdrecord work correctly. They even removed several related
consistency checks and cause the fork to fail later with 
unklear problems.

Doing a chmod on /dev/ entries is not a solution as it
causes your system to become less secure.

I recommend to get recent original software from:


make sure to call "make install" as root to get it
installed suid root.
Comment 4 Tom London 2009-02-10 10:34:01 EST
I'm running rawhide, but there 'getfacl /dev/sr0' now says:

[root@tlondon ~]# getfacl $_
getfacl: Removing leading '/' from absolute path names
# file: dev/sr0
# owner: root
# group: cdrom

[root@tlondon ~]# 

Looks like the "mask" has changed from "r--" to "rw-".

I'm guessing changes with {Policy,Console}Kit or some such.
Comment 5 Jerry Amundson 2009-08-12 10:21:37 EDT
Works for me.
hal-0.5.12-15.20081027git.fc10.i386 (from updates-testing)
Comment 6 Tom London 2009-08-12 10:29:46 EDT
I haven't closed this since I've been running Rawhide (not fc10!), so I couldn't verify that it was fixed for fc10.

I'm willing to close this based on report in comment 5....

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