On Thu, Jul 24, 2014 at 10:31:11PM +0200, Benno Schulenberg wrote:
> Current mount (2.25) will always mount a device when more
> than one type is given in a comma-separated list. Older mount
> (2.17.2 for example) would not not do that but error out.
We want to support list-of-types in fstab and on command line.
> For example, /dev/sda2 is of type ext4, but we are playing dumb,
> to see what mount will say:
>
> $ sudo ./mount /dev/sda2 /place -t btrfs
> lt-mount: /dev/sda2: can't read superblock
>
> $ sudo ./mount /dev/sda2 /place -t msdos
> lt-mount: wrong fs type, bad option, bad superblock on /dev/sda2,
> missing codepage or helper program, or other error
>
> In some cases useful info is found in syslog - try
> dmesg | tail or so.
>
> $ sudo ./mount /dev/sda2 /place -t btrfs,msdos
this is bug, it continues with /{proc,etc}/filesystems when no found
anything useful in the list.
> $ ./mount | grep sda2
> /dev/sda2 on /place type ext4 (rw)
>
> I find this surprising. If -t does not support a comma-separated
> list, it should report an error. If it does, it should, IMO, only
> try the specified types and not any others.
yes, I'm just working on patch and regression test for all -t
use-cases.
Karel
--
Karel Zak <kzak@xxxxxxxxxx>
http://karelzak.blogspot.com
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