Re: [Jython-users] Running System Commands

[Robert W. B. <rb...@di...>]

Hi Chris,

On Wed, 28 Mar 2001, Chris Meyers wrote:
> Is there an easy (or not so easy) way to run a system command in jython?

yes, Runtime.

> tried to run os.system(xpdf foo.pdf) and I get this:
>
> AttributeError: class 'org.python.modules.os' has no attribute 'system'

There is no os.system in Jython.  Brian Z recently posted the Runtime
info/examples that will help.  Found at:

http://www.geocrawler.com/lists/3/SourceForge/7017/75/5376252/
           - and -
http://www.geocrawler.com/lists/3/SourceForge/7017/75/5376101/

I haven't really looked at this, but if you really wanted os.system,
it could start with something as simple as patch below considering how
os.system doesn't return data.
<warning- untested, just for example>

--- /usr/src/CVS/jython/Lib/javaos.py	Wed Jan 31 04:38:36 2001
+++ javaos.py	Mon Mar 19 18:00:37 2001
@@ -1,5 +1,6 @@
 import java
 from java.io import File
+from java.lang import Runtime
 import javapath
 path = javapath

@@ -51,6 +52,10 @@
     if not File(path).delete():
 	raise OSError(0, "couldn't delete directory", path)

+def system(cmd):
+    if not Runtime.getRuntime().exec(cmd):
+        raise OSError(0, "couldn't run command:  %s" % cmd)
+
 unlink = remove

 def stat(path):
@@ -62,5 +67,5 @@
     # is zero sized or does not exist.
     if size == 0 and not f.exists():
         raise OSError(0, 'No such file or directory', path)
-    mtime = f.lastModified() / 1000.0
+    mtime = f.lastModified()
     return (0, 0, 0, 0, 0, 0, size, mtime, mtime, 0)