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Re: 1.5.12: ssh hangs with Windows XP SP2


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@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@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
-- 
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     |,4-  ) )-,_. ,\ (  `'-'		Igor Pechtchanski, Ph.D.
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"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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