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Date: Thu, 18 Nov 2004 16:30:20 -0500 (EST)
From: Igor Pechtchanski <pechtcha AT cs DOT nyu DOT edu>
Reply-To: cygwin AT cygwin DOT com
To: Stephen Studley <sstudley AT adobe DOT com>
cc: cygwin AT cygwin DOT com
Subject: Re: Executing ssh from perl
In-Reply-To: <p0610050ebdc2bb230c14@[153.32.225.133]>
Message-ID: <Pine.GSO.4.61.0411181627330.17559@slinky.cs.nyu.edu>
References: <p0610050abdc2a0cde006@[153.32.225.133]> <Pine DOT GSO DOT 4 DOT 61 DOT 0411181407420 DOT 17559 AT slinky DOT cs DOT nyu DOT edu> <p0610050bbdc2adfcf70d@[153.32.225.133]> <Pine DOT GSO DOT 4 DOT 61 DOT 0411181537080 DOT 17559 AT slinky DOT cs DOT nyu DOT edu> <p0610050ebdc2bb230c14@[153.32.225.133]>
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On Thu, 18 Nov 2004, Stephen Studley wrote:

> At 3:39 PM -0500 11/18/04, Igor Pechtchanski wrote:
> >  > unfortunately, no change in my results.
> > >  BTW: I have ssh configured for passwordless connection.
> >
> > You *did* properly escape the command string, right?  Otherwise,
> >
> > my $str = `ssh -n user AT machine DOT domain ls`;
> >
> > will try to interpolate the contents of the array @machine into the
> > command...  You need to use
> >
> > my $str = `ssh -n user\@machine.domain ls`;
> >
> > BTW, the -n flag is still useful, since some commands don't properly run
> > otherwise.
>
> yep, everything is escaped as needed. I know that by looking at the debug
> output:
> debug1: Sending command: ls <path to file I care about>
>
> I've also printed the command to stdout and pasted it into a windows cmd shell
> and cygwin terminal with success.
>
> If I use system("<cmd>"); instead of `<cmd>`;, the command returns 0, (no
> hang).  Unfortunately system wont work for my needs, as it is critical I
> evaluate stdout:stderr.
>
> I do appreciate your help.
> Stephen

I suppose the next step is to try to reproduce this in a command-line perl
invocation, e.g., something like

perl -we 'my $str=`ssh -n user\@machine.domain ls`;print "[$str]\n"'

and see what messages that produces.  I assume it's working for you from a
Linux machine...  Also, I don't believe you've said anything about your
system configuration -- please review <http://cygwin.com/problems.html>
and provide the requested information.
	Igor
-- 
				http://cs.nyu.edu/~pechtcha/
      |\      _,,,---,,_		pechtcha AT cs DOT nyu DOT edu
ZZZzz /,`.-'`'    -.  ;-;;,_		igor AT watson DOT ibm DOT com
     |,4-  ) )-,_. ,\ (  `'-'		Igor Pechtchanski, Ph.D.
    '---''(_/--'  `-'\_) fL	a.k.a JaguaR-R-R-r-r-r-.-.-.  Meow!

"The Sun will pass between the Earth and the Moon tonight for a total
Lunar eclipse..." -- WCBS Radio Newsbrief, Oct 27 2004, 12:01 pm EDT

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