sftp client for dropbear

[Roberto A. Foglietta]

2007/9/18, Roberto A. Foglietta <roberto.foglietta at gmail.com>:
> 2007/9/17, Matt Johnston <matt at ucc.asn.au>:
> > On Mon, Sep 17, 2007 at 02:52:58PM +0200, Roberto A. Foglietta wrote:
> > > 2007/9/17, Matt Johnston <matt at ucc.asn.au>:
> > > > On Mon, Sep 17, 2007 at 10:25:49AM +0200, Roberto A. Foglietta wrote:
> > > > > Hi to all folks,
> > > > >
> > > > >  do you know a sftp client which could work with dropbear?
> > > > >  I tried which one comes with OpenSSH but does not work.
> > > > >
> > > > >  In case there is not any sftp client for dropbear do you think
> > > > > adapting openssh one it could be a lot of work or just a different ssh
> > > > > syntax adapt?
> > > >
> > > > How does it not work? Have you tried the instructions from
> > > > http://lists.ucc.gu.uwa.edu.au/pipermail/dropbear/2007q1/000502.html ?
> > > > (see the followup posts too)
> > >
> > >  Yes, but... I was talking about sftp client not server!
> > >  Have I missed something about that thread?
> >
> > Oops sorry, misread the mail.
> >
> > I can get the OpenSSH sftp client to work with dbclient on a
> > Linux system with
> > sftp -s /usr/lib/openssh/sftp-server -S /usr/bin/dbclient remotehost
> > though for some reason it seems not to work on Mac OS X
> > here - I'll try figure what's happening. Does that work for
> > you (with paths changed appropriately)? I assume the sftp
> > client will compile with similar settings to sftp-server.
> >
>
>  sftp client was cross-compiled for a PPC board while sftp-server is
> running onto an Ubuntu Linux / x86 arch. \
>
>  After login sftp gets out immediately, however if I specify a batch
> file it works.
>  Finally I found very annoying having to tell to sftp command where is
> the remote sftp-server binary!
>
> ~ # sftp -S /usr/bin/dbclient -s /usr/lib/openssh/sftp-server
> foglietr at 172.16.119.6
> Connecting to 172.16.119.6...
> WARNING: Ignoring unknown argument '-oForwardX11 no'
> WARNING: Ignoring unknown argument '-oForwardAgent no'
> WARNING: Ignoring unknown argument '-oPermitLocalCommand no'
> WARNING: Ignoring unknown argument '-oClearAllForwardings yes'
> WARNING: Ignoring unknown argument '-oProtocol 2'
> foglietr at 172.16.119.6's password:
> foglietr at 172.16.119.6's password:
> foglietr at 172.16.119.6's password:
> xset:  unable to open display ""
> xset:  unable to open display ""
> sftp>
> ~ #

The amazing thing is.... 2>/dev/null resolve the issue!

sftp -s /usr/lib/openssh/sftp-server -S /usr/bin/dbclient
foglietr at 172.16.119.6 2>/dev/null

 It does not make any sense for me. Anyway sftp.err.1 is a strace log
in console without any 2>redirection while sftp.err.2 is the log saved
on file. With the help of diff I see in the first case reading fd=0
whould returns EAGAIN and quit.

 Do you think could be a bug of openssh project or dropbear?

 Cheers,
-- 
/roberto