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Date: Thu, 9 Dec 2004 13:41:35 -0500 (EST)
From: Igor Pechtchanski <pechtcha AT cs DOT nyu DOT edu>
Reply-To: cygwin AT cygwin DOT com
To: "Waiss, Garrett" <GWaiss AT netsuite DOT com>
cc: cygwin AT cygwin DOT com
Subject: Re: 1.5.12: ssh hangs with Windows XP SP2
In-Reply-To: <3A83D9BECDDF58468F068F6CA1C36AB90288A849@corpmail.corp.netledger.com>
Message-ID: <Pine.GSO.4.61.0412091338320.13318@slinky.cs.nyu.edu>
References: <3A83D9BECDDF58468F068F6CA1C36AB90288A849 AT corpmail DOT corp DOT netledger DOT com>
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On Wed, 8 Dec 2004, Waiss, Garrett wrote:

> Cygwin version: 1.5.12
> OS: Windows XP SP2
>
> Before applying the SP2, ssh was working fine. Now ssh will hang with
> this specfic case.
>
> This works:
> sh -c "ssh -i c:/keys/id_foo foo AT bong 'ls -l /opt/'"
>
> However, putting this into a java class for instance will cause this to
> hang:
>
> <code>
> import java.io.*;
>
> public class test {
>    public static void main(String[] args) {
>       try {
>          final String cmd = "/bin/ssh -p 22 -i c:/keys/id_foo foo AT bong 'ls -l /opt'";
>          final Process p = Runtime.getRuntime().exec(new String[] {
>             "sh", "-c", cmd
>          });
>          final InputStreamReader isr = new InputStreamReader(p.getInputStream());
>          final BufferedReader br = new BufferedReader(isr);
>          String line;
>          final StringBuffer sb = new StringBuffer(0);
>          while((line = br.readLine()) != null) {
>             sb.append(line);
>             sb.append('\n');
>          }
>          System.out.println(sb.toString());
>       }
>       catch (Exception e) {
>          System.out.println(e.getMessage());
>       }
>    }
> }
> </code>
>
> Is there a solution to this problem?

It's usually recommended to invoke remote commands that don't require
input with the "-n" ssh flag, which will close stdin -- try that.  If it
doesn't help, this could be the problem with the new pipe code that's been
mentioned on this list -- search the web archives for "ssh hangs".
HTH,
	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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