Date: Tue, 14 Jan 1997 13:27:01 +0100 (MET) From: Christoph Kukulies <kuku@gilberto.physik.rwth-aachen.de> To: freebsd-questions@freefall.FreeBSD.org Subject: NFS problem Message-ID: <199701141227.NAA13072@gilberto.physik.rwth-aachen.de>
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I have supplied a simple suid program doing a
"system /sbin/mount -t cd9660 /dev/wcd0c /cdrom" on a
2.2-BETA machine. The program is
-rwsr-xr-x 1 root bin 8808 Jan 14 13:12 /usr/local/bin/cdmount
(I left out nosuid,noexec considerations here for simpliness).
/etc/exports:
/usr -alldirs chuck hp
/ -alldirs gil blues hp
/cdrom gil blues hp
mounted is running -n (tried without also)
When I do the mount being su'ed everything works fine on the
client side.
Doing the mount with the suid program results in
mounting failure on the client side (hp-ux):
hp-ux # mount smile:/cdrom /mnt
mount: smile:/cdrom on /mnt: Permission denied
Mounting using the suid program I get (on the server):
smile # mount
miles> mount
/dev/wd0a on / (NFS exported, local)
/dev/wd0s3e on /usr (NFS exported, local)
/dev/wd0s1 on /c (local)
procfs on /proc (local)
/dev/wcd0c on /cdrom (local, read-only)
Looking at the mount type on the server side I get the following
picture in the case of mounting as 'su':
smile # mount
/dev/wd0a on / (NFS exported, local)
/dev/wd0s3e on /usr (NFS exported, local)
/dev/wd0s1 on /c (local)
procfs on /proc (local)
/dev/wcd0c on /cdrom (NFS exported, local, read-only)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
I'm baffled.
--Chris Christoph P. U. Kukulies kuku@gil.physik.rwth-aachen.de
Any clues?
help
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