iB::Topic::/dev/fb0 access denied when using fbi

	Damn Small Linux :: Damn Small Linux Board The DSL Forums

» Welcome Guest
[ Log In :: Register ]

Damn Small Linux Board » Damn Small Linux » Other Help Topics » /dev/fb0 access denied when using fbi

		Mini-ITX Boards Sale, Fanless BareBones Mini-ITX, Bootable 1G DSL USBs, 533MHz Fanless PC <-- SALE $200 each!
		Get The Official Damn Small Linux Book. DSL Market , Great VPS hosting provided by Tektonic

Pages: (4) </ 1 2 [3] 4 >/

[ Track this topic :: Email this topic :: Print this topic ]

Topic: /dev/fb0 access denied when using fbi

< Next Oldest | Next Newest >

mikshaw

Group: Members
Posts: 4856
Joined: July 2004

Posted: Jan. 25 2007,18:22

one thing about usermod -G....
I had the understanding that this replaces the user's groups, rather than adds to them. Would you need to do this:
sudo usermod -G staff,dialout,fax,voice,cdrom,floppy,tape,sudo,audio,dip,video,games,users,usb,tty dsl

I'm not sure about that, but it's the command I use to fix dsl's permissions to use a subshell with mc.uci

--------------
http://www.tldp.org/LDP/intro-linux/html/index.html

^thehatsrule^ Offline

Group: Members
Posts: 3275
Joined: July 2006

Posted: Jan. 26 2007,00:13

For special device files, I've used cp -a on them before to get them to work.

mikshaw

Group: Members
Posts: 4856
Joined: July 2004

Posted: Jan. 26 2007,00:51

That may not work for the framebuffer device, or other tty device. I'm guessing cp tries to read the device, which i assume is constantly changing or being written...something like that (example: try "cat /dev/tty1" and the command doesn't complete). Copying some devices may just copy the /dev/whatever file itself, but I have a feeling that this is an exception.

--------------
http://www.tldp.org/LDP/intro-linux/html/index.html

Zucca

Group: Members
Posts: 524
Joined: Feb. 2006

Posted: Jan. 30 2007,12:07

Quote

-G group,[...]
A list of supplementary groups which the user is also a member
of. Each group is separated from the next by a comma, with no
intervening whitespace. The groups are subject to the same
restrictions as the group given with the -g option. If the
user is currently a member of a group which is not listed, the
user will be removed from the group. This behaviour can be
changed via -a option, which appends user to the current sup-
plementary group list.

AND

Quote

$ ls -lhaF /KNOPPIX/dev/fb* | head -n 3
crw--w--w- 1 root tty 29, 0 Apr 15 2001 /KNOPPIX/dev/fb0
crw--w--w- 1 root tty 29, 1 Apr 15 2001 /KNOPPIX/dev/fb0autodetect
crw--w--w- 1 root tty 29, 0 Apr 15 2001 /KNOPPIX/dev/fb0current

Then this should work:

Code Sample

sudo usermod -a -G tty dsl

... But as usermod is old in dsl you must specify all the groups. ;(
I wonder if there's a way somehow to list groups where a user belongs to..?

--------------
Do you have it? - http://dy.fi/mak

mikshaw

Group: Members
Posts: 4856
Joined: July 2004

Posted: Jan. 30 2007,14:34

As dsl: groups
As root: groups dsl

I imagine one could write a small script that uses groups to list your groups and appends to that, so you don't need to type a list of groups.

GRPS=`groups`
sudo usermod -G $GRPS tty dsl

--------------
http://www.tldp.org/LDP/intro-linux/html/index.html

15 replies since Jan. 23 2007,15:26

< Next Oldest | Next Newest >

[ Track this topic :: Email this topic :: Print this topic ]

Pages: (4) </ 1 2 [3] 4 >/

Damn Small Linux Board » Damn Small Linux » Other Help Topics » /dev/fb0 access denied when using fbi