On Fri, Mar 31, 2017 at 11:00:24AM +0200, Rüdiger Meier wrote:
> $ truncate -s100M /tmp/img
> $ losetup /dev/loop0 /tmp/img
> $ mkfs.ext2 /dev/loop0
>
> $ mkdir /tmp/mnt
> $ ln -s /tmp /tmp/xyz/symlink
>
> $ mount /dev/loop0 /tmp/xyz/symlink/mnt
> $ mount | grep loop
> /dev/loop0 on /tmp/mnt type ext2 ...
>
>
> I need a command which outputs "/dev/loop0" when "/tmp/xyz/symlink/mnt" is
> given.
$ findmnt -no SOURCE /tmp/xyz/symlink/mnt
/dev/loop0
Note that for bind mounts there is nothing like primary (original)
and secondary mountpoints. It's two ways to the same filesystem.
Karel
--
Karel Zak <kzak@xxxxxxxxxx>
http://karelzak.blogspot.com
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