Re: devfs vs udev, thoughts from a devfs user

[Maneesh Soni]

On Wed, Feb 11, 2004 at 01:59:39AM +0000, Kevin P. Fleming wrote:
> Greg KH wrote:
> 
> >Doesn't work for what we want here:
> >
> >	$ mkdir /tmp/a /tmp/b
> >	$ mount -t ramfs none /tmp/a
> >	$ touch /tmp/a/foo
> >	$ mount --move /tmp/a /tmp/b
> >	$ ls /tmp/b
> >	foo
> >	$ umount /tmp/a
> >	$ ls /tmp/b
> >	$ 
> 
> That seems very odd, the "umount /tmp/a" should have failed, given than 
> nothing is mounted there any longer.

I think there is a bug in the mount utility. /etc/mtab is not updated
correctly after "mount --move". /proc/mounts does get updated correctly.
So, if one creates /etc/mtab as sym linked with /proc/mounts, the above 
steps will correctly _fail_ "umount /tmp/a"

Maneesh

-- 
Maneesh Soni
Linux Technology Center, 
IBM Software Lab, Bangalore, India
email: maneesh@xxxxxxxxxx
Phone: 91-80-25044999 Fax: 91-80-5268553
T/L : 9243696
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