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Re: [vox-tech] devfs and mkisofs, don't have permission to createmultisession cd's
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Re: [vox-tech] devfs and mkisofs, don't have permission to createmultisession cd's



--On Saturday, January 31, 2004 01:12:51 AM -0800 "Samuel N. Merritt" <spam@andcheese.org> wrote:

On Fri, Jan 30, 2004 at 04:04:02PM -0800, Ken Bloom wrote:
I have a backup script that I run periodically (and I haven't run it
in two whole weeks), and I was trying to run it today but since having
switched to devfs, the permissions on the cd drive's device file seem
to have changed (probably as a result of the switch), so that I can't
read the file system. As a result, I can't add new sessions to a CD
because a permissions error keeps mkisofs from reading the previous
sessions on the CD.

Devfs complains about /dev/sg0

[bloom@kabloom ~]% ls -l /dev/sg0
lr-xr-xr-x    1 root     root           36 2004-01-30 07:22 /dev/sg0
-> scsi/host0/bus0/target0/lun0/generic
[bloom@kabloom ~]% ls -l `readlink -f /dev/sg0`
crw-r--r--    1 root     cdrom     21,   0 1969-12-31 16:00
/dev/scsi/host0/bus0/target0/lun0/generic

I'd set the device to 664 and make sure that the user running the
backup script is in the "cdrom" group.
Some systems will change the ownership on various devices to match the user logged in on the console, then set the ownership back when the user logs out. The idea is to let the person sitting in front of the computer have access to the cd-roms, sound device, etc. See if you have a file named "console.perms" in /etc/security or some similar location. You should be able to adjust it to include the scsi generic devices.

--
Ken Herron
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