AW: feature request

[Fiedler Roman]

> -----Ursprüngliche Nachricht-----
> Von: openssh-unix-dev-bounces+roman.fiedler=ait.ac.at at mindrot.org
> [mailto:openssh-unix-dev-bounces+roman.fiedler=ait.ac.at at mindrot.org]
> Im Auftrag von Cyrille Lefevre
> Gesendet: Dienstag, 8. Februar 2011 10:41
> An: openssh-unix-dev at mindrot.org
> Betreff: Re: feature request
> 
> 
> Le 08/02/2011 01:41, Iain Morgan a écrit :
> >
> > On Mon, Feb 07, 2011 at 15:56:29 -0600, Cyrille Lefevre wrote:
> >>
> >> Hi,
> >>
> >> how about to provide a simple way to forward raw file descriptors
> >> through ssh tunnels.
> >>
> >> something which may provide a way to write something like :
> >>
> >> (echo 3; read>  out3) |&
> >> exec 3<&p 4>&p
> >> echo 5>| out5
> >> exec 5<>  out5
> >> echo 1 |
> >> ssh -d 3:rd -d 4:wr -d 5:rw '
> >> 	read<&3; echo $REPLY>&4
> >> 	read; echo $REPLY
> >> 	read<&5; echo $REPLY>&5
> >> '>  out1
> >>
> >> the expected result is 1 in out1, 3 in out3 and 5\n5 in out5.
> >>
> >> PS : hope the sample is right :-)
> >
> > What problem are you hoping to solve with this?
> 
> the ability to have more than the 3 standard file descriptors in remote
> shell scripting.
> 
> a common case I use is :
> 
> exec 9>&1
> var=$(script)
> 
> where script output its result on fd 1, error messages of fd 2 and
> informational messages on fd 9. don't ask why, it's like that.
> 
> thing impossible through ssh w/o playing w/ something to multiplex
> standard file descriptors through fd 2 using fifos, tags and loops.
> 
> https://groups.google.com/group/fr.comp.os.unix/browse_thread/thread/8
> acc88b475b324b6/21d2e2f1bf85c5a7?hl=fr&ie=UTF-
> 8&q=cyrille+lefevre+PreSshFilterLog&pli=1
> 
> I've tryed netpipesw/o success and even if that worked, that will
> require to have netpipes on every host which is not possible in my
> production environment.

I've had the same problem with ssh. I'll check the netpipes, perhaps they could be used. At the moment a primitive multiplexer based on "xxd -p", "grep", "sed" is in use.