Re: Adding subroot information to /proc/mounts, or obtaining that through other means

Karel Zak
2007-06-20T22:06:18Z

On Wed, Jun 20, 2007 at 01:57:33PM -0700, H. Peter Anvin wrote:
>
> We could add a field to /proc/mounts to add this information:
>
> /dev/md6 /export ext3 rw,data=ordered 0 0 /
> /dev/md6 /home/foo ext3 rw,data=ordered 0 0 /users/foo
> /dev/md6 /home/bar ext3 rw,data=ordered 0 0 /users/bar

I prefer this format. It's compatible with the mount(8) -- the mount
ignores extra columns.

> ... or, alternatively, add a subfield to the first field (which would
> entail escaping whatever separator we choose):
>
> /dev/md6 /export ext3 rw,data=ordered 0 0
> /dev/md6:/users/foo /home/foo ext3 rw,data=ordered 0 0
> /dev/md6:/users/bar /home/bar ext3 rw,data=ordered 0 0

We needn't a new separator (':') there already is one (' ').

> I'm personally leaning toward the second option (/dev/md6:/users/foo).
> Although that might confuse current utilities, those utilities are
> *already* liable to get confused by the fact that the line doesn't mean
> what they think it means.

Many people use "ln -s /proc/mounts /etc/mtab".

Karel

--
Karel Zak <kzak@redhat.com>