writeprotection of unmounted mountpoints automaitcally - possible??

[Alexander Raab]

Jonathan Berry wrote:

>On Fri, 14 Jan 2005 09:30:29 +0100, Alexander Raab
><alexander.raab at chello.at> wrote:
>  
>
>>Hi, all.
>>Is there a possibility to set the permissons of ummounted mountpoints to
>>writeprotected?
>>I am coping files very often without checking if a usb-drive is really
>>mounted.
>>
>>Alex
>>    
>>
>
>I think this would be possible, but only if what you are mounting is,
>say, formatted with FAT or FAT32.  I know the permissions for those
>FSs are set when the device is mounted with options in fstab.  You
>should be able to "chmod -w" the mount point (device is not mounted),
>which should prevent writing.  Then when the device is mounted, the
>options should change the permissions.  You can always try it and see
>what happens.
>I know if the device is formatted with ext3 then you simply
>chmod/chown the directory after the device is mounted to change the
>permissions on the device.  I don't recall whether these permissions
>are seperate from those of the directory when nothing is mounted
>there.  Again, I'd suggest just trying it and seeing what happens. 
>You can always change it if it doesn't work.
>
>Jonathan
>
>  
>
Hi,
nice idea, but change the permissions didn't help.
I have made a chmod -rwx and d--------- looks good, but it didn't help.
No permissions, but I still can write there.
Alex