Improving some scripts; exploit cache better.

gui/Scyther/Misc.py

@@ -105,8 +105,7 @@ def safeCommandOutput(cmd):
     Meant for short outputs, as output is stored in memory and
     not written to a file.
     """
-
-    p = Popen(cmd, shell=True, stdout=PIPE, stderr=PIPE)
+    p = Popen(cmd, shell=getShell(), stdout=PIPE, stderr=PIPE)
     (sout,serr) = p.communicate()
 
     return (p.returncode,sout,serr)
@@ -115,7 +114,7 @@ def safeCommand(cmd):
     """ Execute a command with some arguments. Safe cross-platform
     version, I hope. """
 
-    p = Popen(cmd, shell=True)
+    p = Popen(cmd, shell=getShell())
     sts = p.wait()
 
     return sts