[wplug] Disk permissions

[Matthew Zwier]

Hi Lawrence,

Is this a DOS/Windows formatted disk?  If so, check out the "Mount
options for FAT" section of the man page for "mount".  Notably, uid,
gid, umask, dmask, and fmask.  For example,

mount -t vfat -o uid=1000,gid=1000 /dev/fd0 /mnt/floppy

If you want all users to be able to write to it:

mount -t vfat -o umask=0777,dmask=0777,fmask=0666 /dev/fd0 /mnt/floppy

If you're mounting a Linux-formatted disk (ext2 or somesuch), you'll
need to mount it as root and change the permissions of the root
directory of the floppy:  chmod a=rwxt /mnt/floppy

Matt Z.

On Mon, Jun 13, 2011 at 11:20 AM, Weber, Lawrence A
<Lawrence.Weber at ansaldo-sts.us> wrote:
> I have been trying to mount a floppy disk with user write permissions on
> Ubuntu 10.04 and Fedora 14 and 15.  No matter what I try, the disk mounts
> but with only root having write permissions.
>
>
>
> Tried:
>
> Mount to /media/disk
>
> Mount to /mnt/floppy
>
> Added a line to fstab to mount a floppy
>
> Udisks –mount /dev/fd0
>
>
>
> These all work except just adding the line to fstab and running mount –a.
> However they all mount the floppy with only root write permission.
>
>
>
> I was just about to give up when I went back to an old Fedora 9 PC and
> noticed that I had a disk mount icon on the toolbar.  I used it to mount a
> disk and the user can both read and write.  I checked and found that it
> created a mount point /media/disk with 755 permissions, so the user should
> not be able to write???  I have no idea how the disk mounter icon’s code
> works.
>
>
>
> The floppy disks are ms-dos formatted.  I noticed that the old Fedora 9 PC
> also can mount a network ms-dos file system but the newer distros have the
> same write restrictions using the same mounting techniques.
>
>
>
> Can anyone point me to a reference to how mount and permissions work?  The
> man page is not enough.
>
>
>
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