On Wed, 2004-12-15 at 16:41 -0500, H. S. wrote: --snip--
Okay, here is what I get when I list the hd[cd] permissions and those of the device link created by pluggin of a USB stick based on my rule in udev:
~# ls -l /dev/hd[cd] /dev/*hs*
brw-rw---- 1 root disk 22, 0 Dec 15 14:13 /dev/hdc
brw-rw---- 1 root disk 22, 64 Dec 15 14:13 /dev/hdd
brw-rw---- 1 root root 8, 0 Dec 15 16:34 /dev/hs-jd-sda
lrwxrwxrwx 1 root root 9 Dec 15 16:34 /dev/hs-jd-usb -> hs-jd-sda
Regarding the cdrom drives (hd[cd]), I looked into /etc/udev/permissions.d/udev.permissions and noticed that I have these lines in this file:
cdemu/*:root:cdrom:0660
ide/*/cd:root:cdrom:0660
ide/*:root:disk:0660 <--- is this deciding the root:disk permissions?
hd[a-s]:root:disk:0660
hd[a-s][0-9]*:root:disk:0660
sd[a-z]:root:disk:0660
sd[a-z][0-9]*:root:disk:0660
sd[a-i][a-z]:root:disk:0660
sd[a-i][a-z][0-9]*:root:disk:0660
Am I supposed to tune this permissions file to make cdrom as root:cdrom? Also, based on these lines, should an /dev/sda device be made by /dev/hs-jd-sda and own by root:disk?
Yes, you need to edit the permissions file. The line you'll probably want to look at for your hd* devices is:
hd[a-s]:root:disk:0660
You'll want to change disk to cdrom. (or, alternately, you can just add yourself to the disk group.)
Here is what I did and it seems to have solved the problem: I just created my own permissions file for udev in /etc/udev/permissions.d: #> ls -l total 4 -rw-r--r-- 1 root root 163 Dec 15 21:26 00hs-udev.permissions -rw-r--r-- 1 root root 2674 Oct 30 06:56 udev.permissions
#> cat 00hs-udev.permissions #permissions added by HS,15Dec,2004, based on: # http://wiki2.archlinux.org/index.php/UdevHowTo
#to make CDROMs root:cdrom hdc:root:cdrom:660 hdd:root:cdrom:660
So, after restarting udev: #> /etc/init.d/udev restart Recreating device nodes...done.
I got /dev/hd[cd] as root:cdrom. BTW, for the CDROM reader, hdc, 440 will also do, right? I cannot write to it anyway.
Regarding adding myself (or any other user) to the 'disk' groups, isn't that a bad idea? I hit upon this option when I first installed Sarge and people here told me *never* to add normal users to the 'disk' group.
Thanks, ->HS
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