SFTP: a new command to get filesystem size/free space

[Thue Janus Kristensen]

On 2/19/07, Damien Miller <djm at mindrot.org> wrote:
> On Sun, 18 Feb 2007, Thue Janus Kristensen wrote:
>
> > I am using sshfs with FUSE to mount a remote directory over ssh/sftp
> > (on linux).
> >
> > It would be nice if df could be able to show the total size/free space
> > of the mounted directory.
> >
> > I am aware that returning size/free space would have some limitations.
> > For example, if a subdir of the mounted directory has another
> > filesystem mounted on the remote server, this can not be represented
> > simply.
> >
> > However, I still think that a simple implementation could be useful.
> > My idea is to simply return the total size and free space of the
> > current working directory.
> >
> > Would you accept patches implementing this?
>
> We would consider them, sure - but we can't promise we will like
> them enough to accept them before we see them :)

Of course :)

> The patch would have the best chance of being accepted if it used the
> SSH2_FXP_EXTENDED protocol message and followed the message format of
> later filexfer drafts for the encoding of filesystem information (IIRC
> recent filexfer drafts have a statvfs-like method).

I skimmed http://tools.ietf.org/html/draft-ietf-secsh-filexfer-13 ,
the latest version available at
http://tools.ietf.org/wg/secsh/draft-ietf-secsh-filexfer/ , but I
didn't notice any reference to this.

> The patch would also need to implement support for it in the sftp
> client, so we can have a way to test the method in our regress tests.

Of course.

> > PS: does the openssh sftp implementation conform to
> > http://www.openssh.org/txt/draft-ietf-secsh-filexfer-02.txt ?  If not,
> > is the protocol described elsewhere?
>
> IIRC we actually implement filexfer-03, but the draft for it seems to
> have fallen off the net.
>
> -d

It is available at http://tools.ietf.org/wg/secsh/draft-ietf-secsh-filexfer/

Regards, Thue