--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ctat_bash_command_executer.py	Tue Jul 17 11:48:23 2018 -0400
@@ -0,0 +1,43 @@
+#!/usr/bin/env python
+
+import sys, subprocess, os
+
+def stop_err( msg ):
+    sys.stderr.write( "%s\n" % msg )
+    sys.exit()
+
+def __main__():
+    # Get command-line arguments
+    args = sys.argv
+    # Remove name of calling program, i.e. ./stderr_wrapper.py
+    args.pop(0)
+
+    # If there are no arguments left, we're done
+    if len(args) == 0:
+        return
+
+    # If one needs to silence stdout 
+    #args.append( ">" )
+    #args.append( "/dev/null" )
+
+    cmdline = " ".join(args)
+    
+    
+    try:
+        # Run program
+        err_capture = open("stderr.txt", 'w')
+        proc = subprocess.Popen( args=cmdline, shell=True, stderr=err_capture, stdout=sys.stdout )
+        returncode = proc.wait()
+        err_capture.close()
+
+        
+        if returncode != 0:
+            raise Exception
+
+    except Exception:
+        # Running Grinder failed: write error message to stderr
+        err_text = open("stderr.txt").readlines()
+        stop_err( "ERROR:\n" + "\n".join(err_text))
+
+
+if __name__ == "__main__": __main__()