How do I grant permission for lp0?

[csdiwhitt]

This problem has been around a while, but I can not find a solution that I can do or works. I have defined my printer, recognized by the cups, When I print the print test page a print job is completed, but there is a message in /var/log/messages as follows:

Aug 16 15:29:01 whitt-desktop kernel: [30445.975135] audit(1218914941.304:5): type=1503 operation="inode_permission" requested_mask="::rw" denied_mask="::rw" name="/dev/tty" pid=14127 profile="/usr/sbin/cupsd" namespace="default"

I found this:

5. 3. Check device file permissions

Device files for printers (like /dev/lp0, /dev/usb/lp0, ...) must be readable and writable for the user "root" and the group "sys".
in:
http://www.linuxprinting.org/~till/p...tut.html#1_1_1

Nice to know, but there was no suggestion of a method to use to do this or even a suggestion of how to fix it.

I have Googled and Search documentation until I am half blind.

I do not understand Commands and don't turst things that I don't understand.

I have had this on my back for over a month. If you know how to grant permission for /dev/lp0 I would be ever grateful.

[sisco311]

Add your user to the lp group.
Open a terminal and run the following command:

sudo adduser your-user-name-here lp

then log out and log in(or reboot).

[csdiwhitt]

OK, I did that, but I get the same message.

whitt@whitt-desktop:~$ sudo adduser lp whitt
[sudo] password for whitt:
Adding user `lp' to group `whitt' ...
Adding user lp to group whitt
Done.
whitt@whitt-desktop:~$

Result message:

Aug 16 16:32:34 whitt-desktop kernel: [34252.059447] audit(1218918754.393:6): type=1503 operation="inode_permission" requested_mask="::rw" denied_mask="::rw" name="/dev/tty" pid=14996 profile="/usr/sbin/cupsd" namespace="default"

Thanks. It didn't solve the problem, but your suggestion was very clear.

[Too Late]

You have to reboot (or re-login) before that change takes effect.

edit: Sorry, it was already said before, didn't notice that.

[csdiwhitt]

Rebooted, but still no change:

Aug 16 16:45:24 whitt-desktop kernel: [ 134.506533] audit(1218919524.150:3): type=1503 operation="inode_permission" requested_mask="::rw" denied_mask="::rw" name="/dev/tty" pid=6241 profile="/usr/sbin/cupsd" namespace="default"

[sisco311]

never mind!
It's a bug:
https://bugs.launchpad.net/ubuntu/+s...ba/+bug/217787

update your system:

sudo aptitude update
sudo aptitude full-upgrade

[csdiwhitt]

OK:

whitt@whitt-desktop:~$ ls -1 /dev/lp0
/dev/lp0
whitt@whitt-desktop:~$

I don't know what it means, but no nasty message.

[Too Late]

It's "ls -l" (letter L with small case), NOT "ls -1" (number one).

[cariboo]

When I run ls -l /dev/lp0, I get the following:

crw-rw---- 1 root lp 6, 0 2008-08-15 15:17 /dev/lp0

Are you not pasting the output?

Jim

[csdiwhitt]

Sorry, not careful enough.

whitt@whitt-desktop:~$ ls -1 /dev/lp0
/dev/lp0
whitt@whitt-desktop:~$ ls -l /dev/lp0
crw-rw---- 1 root lp 6, 0 2008-08-16 16:53 /dev/lp0
whitt@whitt-desktop:~$

It does make a difference.