On Sat, Jun 16, 2012 at 11:43 AM, Christiano F. Haesbaert <[email protected]> wrote: > On Sat, Jun 16, 2012 at 01:48:17PM +0200, Antoine Jacoutot wrote: >> On Sat, Jun 16, 2012 at 12:39:36PM +0100, Mik J wrote: ... >> > However, I'm unable to >> > mount the partition if the owner of /mnt/extpart is root although that mount >> > point is rwx by the group operator and myuser belongs to that group. >> > # ls -l >> > /mnt >> > drwxrwxr-x 2 root operator 512 May 7 22:38 extpart >> > >> > I assume that >> > kern.usermount allows a partition to be mounted only if the mount point is >> > owned by a user and the group owner is not considered. >> > I have search for a >> > variable kern.groupmount but there is not such thing. >> > >> > So my question is: >> > Is >> > it possible to allow a group to mount partitions (or usb keys, cdrom) ? >> >> Man mount(8). >> " >> Only the superuser may >> mount file systems unless kern.usermount is nonzero (see sysctl(8)), the >> special device is readable and writeable by the user attempting the >> mount, and the mount point node is owned by the user attempting the >> mount. >> " > > Any special reason why not respecting groups ? > This feels like a strange behaviour.
It's not obvious to me that it's safe. For example, you would also need a !(mode & S_ISTXT) test. Should sys_unmount let other users in the group unmount it? Stacking of mounts by different users in the same group? Lacking any info about what problem this is supposed to be a solution to, my response to the original question is "Have each user mount somewhere they own and use a symlink" Philip Guenther
