Thread: [Jython-users] Can't run java.lang.Runtime.getRuntime().exec("cmd....")

Brought to you by: bckfnn, bwarsaw, bzimmer, cgroves, and 4 others

jython-users

[Jython-users] Can't run java.lang.Runtime.getRuntime().exec("cmd....")

From: Alec C. <ale...@me...> - 2003-05-01 05:01:29

G'Day

Jython 2.1 on Windows 2000 SP3. JDK 1.4.1_1

I am trying to execute a command from within a Jython script and 
failing. The snippet below shows the problem I am seeing. I have tried 
various different approaches and failed. The only thing I can think of 
is that the Java security manager is stopping this perhaps??? How would 
I find out or fix it?

Many thanks



 >>> from java.util import Random
 >>> r = Random()
 >>> r.nextInt()
1416976808
 >>> from java.lang import Runtime
 >>> java.lang.Runtime.getRuntime().exec("cmd.exe /cecho hello")
Traceback (innermost last):
   File "<console>", line 1, in ?
NameError: java





-- 
Alec Clews,            Consultant, Merant, Australia
<alec dot clews at merant dot com>
Voice +61-(3)9522-4441          http://merant.com/

Re: [Jython-users] Can't run java.lang.Runtime.getRuntime().exec("cmd....")

From: Oti <oh...@ya...> - 2003-05-01 05:10:02

[ Alec Clews ]

>  >>> from java.util import Random
>  >>> r = Random()
>  >>> r.nextInt()
> 1416976808
>  >>> from java.lang import Runtime
>  >>> java.lang.Runtime.getRuntime().exec("cmd.exe /cecho hello")
> Traceback (innermost last):
>    File "<console>", line 1, in ?
> NameError: java

[infra|pwe] > jython
Jython 2.1 on java1.4.1_02 (JIT: null)
Type "copyright", "credits" or "license" for more information.
>>> from java.lang import Runtime
>>> Runtime.getRuntime().exec("cmd.exe /cecho hello")
java.lang.Win32Process@9446e4
>>> 

So if you say:
  process = Runtime.getRuntime().exec("cmd.exe /cecho hello")
you can grab the output of the process.

On the other hand, os.system() maybe already does it for you:
>>> import os
>>> os.system( "echo hello" )
hello
0
>>> 

Best wishes,
Oti.

__________________________________
Do you Yahoo!?
The New Yahoo! Search - Faster. Easier. Bingo.
http://search.yahoo.com

Re: [Jython-users] Can't run java.lang.Runtime.getRuntime().exec("cmd....")

From: Alec C. <ale...@me...> - 2003-05-01 05:18:35

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
  <meta http-equiv="Content-Type" content="text/html;charset=ISO-8859-1">
  <title></title>
</head>
<body>
Oti,<br>
<br>
Many thanks for the help. After you pointed it&nbsp; out it was obvious, bit
embarrassed I did not spot that :-)<br>
<br>
One thing that surprised me was that os.system worked -- I understood
from the Jython web site that os did not work unless you download some
special version implemented using JNI<br>
<br>
<br>
Oti wrote:<br>
<blockquote type="cite"
 cite="mid...@we...">
  <pre wrap="">[ Alec Clews ]

  </pre>
  <blockquote type="cite">
    <pre wrap=""> &gt;&gt;&gt; from java.util import Random
 &gt;&gt;&gt; r = Random()
 &gt;&gt;&gt; r.nextInt()
1416976808
 &gt;&gt;&gt; from java.lang import Runtime
 &gt;&gt;&gt; java.lang.Runtime.getRuntime().exec("cmd.exe /cecho hello")
Traceback (innermost last):
   File "&lt;console&gt;", line 1, in ?
NameError: java
    </pre>
  </blockquote>
  <pre wrap=""><!---->
[infra|pwe] &gt; jython
Jython 2.1 on java1.4.1_02 (JIT: null)
Type "copyright", "credits" or "license" for more information.
  </pre>
  <blockquote type="cite">
    <blockquote type="cite">
      <blockquote type="cite">
        <pre wrap="">from java.lang import Runtime
Runtime.getRuntime().exec("cmd.exe /cecho hello")
        </pre>
      </blockquote>
    </blockquote>
  </blockquote>
  <pre wrap=""><!---->java.lang.Win32Process@9446e4
  </pre>
  <pre wrap=""><!---->
So if you say:
  process = Runtime.getRuntime().exec("cmd.exe /cecho hello")
you can grab the output of the process.

On the other hand, os.system() maybe already does it for you:
  </pre>
  <blockquote type="cite">
    <blockquote type="cite">
      <blockquote type="cite">
        <pre wrap="">import os
os.system( "echo hello" )
        </pre>
      </blockquote>
    </blockquote>
  </blockquote>
  <pre wrap=""><!---->hello
0
  </pre>
  <pre wrap=""><!---->
  </pre>
</blockquote>
<br>
<br>
<pre class="moz-signature" cols="72">-- 
Alec Clews,            Consultant, Merant, Australia
&lt;alec dot clews at merant dot com&gt;
Voice +61-(3)9522-4441          <a class="moz-txt-link-freetext" href="http://merant.com/">http://merant.com/</a>
</pre>
</body>
</html>

Re: [Jython-users] Can't run java.lang.Runtime.getRuntime().exec("cmd....")

From: Oti <oh...@ya...> - 2003-05-01 05:26:26

[ Alec Clews ]

> One thing that surprised me was that os.system worked -- I
> understoodfrom the Jython web site that os did not work unless you
> download somespecial version implemented using JNI

Not everything from the os module is working like in CPython, but quite
a bit !

Oti.

__________________________________
Do you Yahoo!?
The New Yahoo! Search - Faster. Easier. Bingo.
http://search.yahoo.com

Re: [Jython-users] Can't run java.lang.Runtime.getRuntime().exec("cmd....")

From: Don C. <dco...@ch...> - 2003-05-01 05:35:00

try >>> Runtime.getRuntime().exec("cmd.exe /cecho hello")

On Thu, 2003-05-01 at 01:01, Alec Clews wrote:
> G'Day
> 
> Jython 2.1 on Windows 2000 SP3. JDK 1.4.1_1
> 
> I am trying to execute a command from within a Jython script and 
> failing. The snippet below shows the problem I am seeing. I have tried 
> various different approaches and failed. The only thing I can think of 
> is that the Java security manager is stopping this perhaps??? How would 
> I find out or fix it?
> 
> Many thanks
> 
> 
> 
>  >>> from java.util import Random
>  >>> r = Random()
>  >>> r.nextInt()
> 1416976808
>  >>> from java.lang import Runtime
>  >>> java.lang.Runtime.getRuntime().exec("cmd.exe /cecho hello")
> Traceback (innermost last):
>    File "<console>", line 1, in ?
> NameError: java
> 
> 
> 
>

Re: [Jython-users] Can't run java.lang.Runtime.getRuntime().exec("cmd....")

From: Jingzhao Ou <ja...@ya...> - 2003-05-01 07:07:59

I am using WindowsXP. I am using jython CVS version on Cygwin. I got the
following. Even though there is no error message, there is nothing happening
either. Any thing wrong? Thanks!

Best regards,
Jingzhao

=================================================================
$ jython
Jython 2.1+ on java1.4.0_01-ea (JIT: null)
Type "copyright", "credits" or "license" for more information.
>>> from java.lang import Runtime
>>> Runtime.getRuntime().exec("cmd.exe /cecho hello")
java.lang.Win32Process@dc4cd9
>>> Runtime.getRuntime().exec("cmd.exe")
java.lang.Win32Process@c6b8b0
>>> Runtime.getRuntime().exec("dir")
java.lang.Win32Process@baf4ae
>>> print Runtime.getRuntime().exec("dir")
java.lang.Win32Process@3e6f83
>>>
==================================================================

--- Don Coleman <dco...@ch...> wrote:
> try >>> Runtime.getRuntime().exec("cmd.exe /cecho hello")
> 
> On Thu, 2003-05-01 at 01:01, Alec Clews wrote:
> > G'Day
> > 
> > Jython 2.1 on Windows 2000 SP3. JDK 1.4.1_1
> > 
> > I am trying to execute a command from within a Jython script and 
> > failing. The snippet below shows the problem I am seeing. I have tried 
> > various different approaches and failed. The only thing I can think of 
> > is that the Java security manager is stopping this perhaps??? How would 
> > I find out or fix it?
> > 
> > Many thanks
> > 
> > 
> > 
> >  >>> from java.util import Random
> >  >>> r = Random()
> >  >>> r.nextInt()
> > 1416976808
> >  >>> from java.lang import Runtime
> >  >>> java.lang.Runtime.getRuntime().exec("cmd.exe /cecho hello")
> > Traceback (innermost last):
> >    File "<console>", line 1, in ?
> > NameError: java
> > 
> > 
> > 
> > 
> 
> 
> 
> -------------------------------------------------------
> This sf.net email is sponsored by:ThinkGeek
> Welcome to geek heaven.
> http://thinkgeek.com/sf
> _______________________________________________
> Jython-users mailing list
> Jyt...@li...
> https://lists.sourceforge.net/lists/listinfo/jython-users

Re: [Jython-users] Can't run java.lang.Runtime.getRuntime().exec("cmd....")

From: Alec C. <ale...@me...> - 2003-05-01 07:23:08

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
  <meta http-equiv="Content-Type" content="text/html;charset=ISO-8859-1">
  <title></title>
</head>
<body>
<br>
<br>
1) Try using os.system(".....")<br>
<br>
Or if you really want to to use java.lang.runtime<br>
<br>
2)&nbsp; I think you will have to find some way of getting hold of stout
from the process object returned by getRuntime. I had a quick look
inthe Java doc but could see noting obvious<br>
<br>
<br>
<br>
Jingzhao Ou wrote:<br>
<blockquote type="cite"
 cite="mid...@we...">
  <pre wrap="">I am using WindowsXP. I am using jython CVS version on Cygwin. I got the
following. Even though there is no error message, there is nothing happening
either. Any thing wrong? Thanks!

Best regards,
Jingzhao

=================================================================
$ jython
Jython 2.1+ on java1.4.0_01-ea (JIT: null)
Type "copyright", "credits" or "license" for more information.
  </pre>
  <blockquote type="cite">
    <blockquote type="cite">
      <blockquote type="cite">
        <pre wrap="">from java.lang import Runtime
Runtime.getRuntime().exec("cmd.exe /cecho hello")
        </pre>
      </blockquote>
    </blockquote>
  </blockquote>
  <pre wrap=""><!---->java.lang.Win32Process@dc4cd9
  </pre>
  <blockquote type="cite">
    <blockquote type="cite">
      <blockquote type="cite">
        <pre wrap="">Runtime.getRuntime().exec("cmd.exe")
        </pre>
      </blockquote>
    </blockquote>
  </blockquote>
  <pre wrap=""><!---->java.lang.Win32Process@c6b8b0
  </pre>
  <blockquote type="cite">
    <blockquote type="cite">
      <blockquote type="cite">
        <pre wrap="">Runtime.getRuntime().exec("dir")
        </pre>
      </blockquote>
    </blockquote>
  </blockquote>
  <pre wrap=""><!---->java.lang.Win32Process@baf4ae
  </pre>
  <blockquote type="cite">
    <blockquote type="cite">
      <blockquote type="cite">
        <pre wrap="">print Runtime.getRuntime().exec("dir")
        </pre>
      </blockquote>
    </blockquote>
  </blockquote>
  <pre wrap=""><!---->java.lang.Win32Process@3e6f83
  </pre>
  <pre wrap=""><!---->==================================================================

--- Don Coleman <a class="moz-txt-link-rfc2396E" href="mailto:dco...@ch...">&lt;dco...@ch...&gt;</a> wrote:
  </pre>
  <blockquote type="cite">
    <pre wrap="">try &gt;&gt;&gt; Runtime.getRuntime().exec("cmd.exe /cecho hello")

On Thu, 2003-05-01 at 01:01, Alec Clews wrote:
    </pre>
    <blockquote type="cite">
      <pre wrap="">G'Day

Jython 2.1 on Windows 2000 SP3. JDK 1.4.1_1

I am trying to execute a command from within a Jython script and 
failing. The snippet below shows the problem I am seeing. I have tried 
various different approaches and failed. The only thing I can think of 
is that the Java security manager is stopping this perhaps??? How would 
I find out or fix it?

Many thanks



 &gt;&gt;&gt; from java.util import Random
 &gt;&gt;&gt; r = Random()
 &gt;&gt;&gt; r.nextInt()
1416976808
 &gt;&gt;&gt; from java.lang import Runtime
 &gt;&gt;&gt; java.lang.Runtime.getRuntime().exec("cmd.exe /cecho hello")
Traceback (innermost last):
   File "&lt;console&gt;", line 1, in ?
NameError: java
      </pre>
    </blockquote>
  </blockquote>
</blockquote>
<br>
<br>
<pre class="moz-signature" cols="72">-- 
Alec Clews,            Consultant, Merant, Australia
&lt;alec dot clews at merant dot com&gt;
Voice +61-(3)9522-4441          <a class="moz-txt-link-freetext" href="http://merant.com/">http://merant.com/</a>
</pre>
</body>
</html>