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insane_rosenberg
n00b
Joined: 19 May 2005
Posts: 45
Location: Melbourne, Australia
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 Posted: Sat Jan 21, 2006 8:43 am Post subject: Programs cannot access CD Drives as user [SOLVED]. |
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Hey Guys,
At the moment I am unable to burn cd's using k3b, or listen to audio cd's, or watch DVD's, using any media player as apparently as user I do not have the required access privelges. It all seems to work fine when I'm logged in as root.
/etc/fstab:
| Code: | none /dev/shm tmpfs nodev,nosuid,noexec 0 0
/dev/hdg1 /boot ext2 defaults,noatime 1 2
/dev/hdg2 none swap sw 0 0
/dev/hdg3 / ext3 noatime 0 1
/dev/hdf1 /shared vfat noatime,uid=1000,gid=100 0 1
/dev/hdc /media/cdrom auto user,exec,noauto,managed 0 0
/dev/hda /media/cdrecorder auto user,exec,noauto,managed 0 0
/dev/floppy/0 /media/floppy auto user,exec,noauto,managed 0 0 |
Any pointers?
Last edited by insane_rosenberg on Sun Jan 22, 2006 10:24 pm; edited 1 time in total |
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lnxz
Guru
Joined: 03 Jul 2005
Posts: 472
Location: Earth
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| Posted: Sat Jan 21, 2006 8:48 am Post subject: |
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Check the permissions of the device by running
You might need to be part of the same group that the device is assigned to (probably "cdrom", "cdrw" or something).
Last edited by lnxz on Sat Jan 21, 2006 9:05 am; edited 1 time in total |
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ectospasm
l33t
Joined: 19 Feb 2003
Posts: 711
Location: Mobile, AL, USA
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| Posted: Sat Jan 21, 2006 8:51 am Post subject: |
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There are a couple of different things you could do. First, check that your normal (non-root) user is a member of these groups: cdrom, cdrw. There may be other groups that you need to be a part of, perhaps dvd or something. You might want to check to see if those groups exist first (look in /etc/group).
Another, probably easier option is to add the "user" option to each drive. This will allow normal users to mount and unmount those drives.
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insane_rosenberg
n00b
Joined: 19 May 2005
Posts: 45
Location: Melbourne, Australia
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| Posted: Sun Jan 22, 2006 1:04 am Post subject: |
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Nah, still no love guys.
k3b complains that it cannot find a suitable writer.
Kaffeine that: "The Source an't be read.
Maybe you dont have enough rights for this source..."
Again both things are still working as root.
lnxz... I tried to check the permissions, but it didn't tell me anything about groups.
For the burner:
| Code: | ls -l /dev/hda
brw-rw---- 1 root disk 3, 0 Jan 22 08:41 /dev/hda |
And DVD rom:
| Code: | ls -l /dev/hdc
brw-rw---- 1 root disk 22, 0 Jan 22 08:41 /dev/hdc |
My /etc/group file:
| Code: | oot:x:0:root
bin:x:1:root,bin,daemon
daemon:x:2:root,bin,daemon
sys:x:3:root,bin,adm
adm:x:4:root,adm,daemon
tty:x:5:
disk:x:6:root,adm
lp:x:7:lp
mem:x:8:
kmem:x:9:
wheel:x:10:root,insane
floppy:x:11:root,insane
mail:x:12:mail
news:x:13:news
uucp:x:14:uucp
man:x:15:man
cron:x:16:cron
console:x:17:
audio:x:18:insane
cdrom:x:19:insane
dialout:x:20:root
ftp:x:21:
sshd:x:22:
at:x:25:at
tape:x:26:root
video:x:27:root,insane
squid:x:31:squid
gdm:x:32:gdm
xfs:x:33:xfs
games:x:35:insane
named:x:40:named
mysql:x:60:
postgres:x:70:
cdrw:x:80:insane
apache:x:81:
nut:x:84:
usb:x:85:insane
vpopmail:x:89:
users:x:100:games,insane
nofiles:x:200:
qmail:x:201:
postfix:x:207:
postdrop:x:208:
smmsp:x:209:smmsp
slocate:x:245:
portage:x:250:portage
utmp:x:406:
nogroup:x:65533:
nobody:x:65534:
rpc:x:111:
messagebus:x:407:
haldaemon:x:408:
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'insane' is the name of my normal user. However it is also the system name. Any more tips would be greatly appreciated. |
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lnxz
Guru
Joined: 03 Jul 2005
Posts: 472
Location: Earth
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| Posted: Sun Jan 22, 2006 6:43 am Post subject: |
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| Both devices belong to the group disk, so you could try adding yourself to that group. |
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insane_rosenberg
n00b
Joined: 19 May 2005
Posts: 45
Location: Melbourne, Australia
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| Posted: Sun Jan 22, 2006 10:24 pm Post subject: |
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Thanks guys, that seems to have done the trick. I just didn't realise that that was the group name, when I did the:
I just thought it was telling me that they were a disk (drive).
Thanks for all the help, my working /etc/group file is below.
| Code: | root:x:0:root
bin:x:1:root,bin,daemon
daemon:x:2:root,bin,daemon
sys:x:3:root,bin,adm
adm:x:4:root,adm,daemon
tty:x:5:
disk:x:6:root,adm,insane
lp:x:7:lp
mem:x:8:
kmem:x:9:
wheel:x:10:root,insane
floppy:x:11:root,insane
mail:x:12:mail
news:x:13:news
uucp:x:14:uucp
man:x:15:man
cron:x:16:cron
console:x:17:
audio:x:18:insane
cdrom:x:19:insane
dialout:x:20:root
ftp:x:21:
sshd:x:22:
at:x:25:at
tape:x:26:root
video:x:27:root,insane
squid:x:31:squid
gdm:x:32:gdm
xfs:x:33:xfs
games:x:35:insane
named:x:40:named
mysql:x:60:
postgres:x:70:
cdrw:x:80:insane
apache:x:81:
nut:x:84:
usb:x:85:insane
vpopmail:x:89:
users:x:100:games,insane
nofiles:x:200:
qmail:x:201:
postfix:x:207:
postdrop:x:208:
smmsp:x:209:smmsp
slocate:x:245:
portage:x:250:portage
utmp:x:406:
nogroup:x:65533:
nobody:x:65534:
rpc:x:111:
messagebus:x:407:
haldaemon:x:408: |
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Black
Apprentice
Joined: 10 Dec 2002
Posts: 158
Location: Québec, Canada
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| Posted: Sun Mar 12, 2006 4:15 am Post subject: |
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Actually, I don't think adding a non-root user to the "disk" group is "the right answer", because I think your user can now write arbitrary data to any disk.
I was with the same problem since my last reboot. I changed the group to "cdrom" instead. Also, I noticed that my /dev/dvd symbolic link was missing, as well as my /dev/cdrom and /dev/cdr.
But, this leaves me with this question: how do I make these changes persistent over a reboot? While I could add the commands to the rc.local file, I think the correct way would be to have udev take care of it.
Kernel 2.6, udev. |
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