Date: Tue, 18 Nov 2003 09:45:35 -0700 From: Dr Lyman Hazelton <lrh@alum.mit.edu> To: freebsd-questions@FreeBSD.ORG Subject: Non-root access to peripheral file devices Message-ID: <200311180945.35813.lrh@alum.mit.edu>
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Perhaps this is discussed somewhere, but so far I haven't found
anything that helps. I have two SCSI CDROM drives (/dev/cd0 and
/dev/cd1) and an IDE floppy drive. All of these drives are mountable
and work flawlessly if I am logged in as root. Trying to mount any
of them as any other login-id results in an "operation not permitted"
message and failure. I have a /cdrom mount point that is matched
with /dev/cd0 in /etc/fstab and says its file type is cd9660. The
permissions on /dev/cd0 are 0555. Same for /cdrom. The owner of
both is root:wheel. I already tried setting the permissions to
5555... no help. The odd thing is that I can successfully run KsCD
using either drive as a non-root user and play music through my sound
card. (Can't seem to make any other sound work, but that is a
separate issue.)
I even tried creating a file in /usr/local/bin called mountcd that has
just the line "mount /cdrom" in it, and setting the super user bit on
the file. That works fine for root, but fails the same way for
non-root users.
Does anyone have a hint that will allow me to fix this problem?
-Lyman
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