OS Commands not executing through published java procedure... :(

Question

Hello all :)
Im trying to get a PL/SQL block to delete a file out in the OS. Theres plenty of examples out there and the one I got came from burleson consulting, and incorporates a java method and a call to java wrapped in PL/SQL.. after all suggested grants, using the procedure yields no result. Here is the source code
-- java procedure used to execute OS command
CREATE OR REPLACE AND COMPILE JAVA SOURCE NAMED "Host" AS
import java.io.*;
public class Host {
public static void executeCommand(String command) {
try {
String[] finalCommand;
if (isWindows()) {
finalCommand = new String[4];
finalCommand[0] = "C:\\WINDOWS\\system32\\cmd.exe";
finalCommand[1] = "/y";
finalCommand[2] = "/c";
finalCommand[3] = command;
else {
finalCommand = new String[3];
finalCommand[0] = "/bin/sh";
finalCommand[1] = "-c";
finalCommand[2] = command;
final Process pr = Runtime.getRuntime().exec(finalCommand);
new Thread(new Runnable() {
public void run() {
try {
BufferedReader br_in = new BufferedReader(new
InputStreamReader(pr.getInputStream()));
String buff = null;
while ((buff = br_in.readLine()) != null) {
System.out.println(buff);
try {Thread.sleep(100); } catch(Exception e) {}
br_in.close();
catch (IOException ioe) {
System.out.println("Exception caught printing process output.");
ioe.printStackTrace();
}).start();
new Thread(new Runnable() {
public void run() {
try {
BufferedReader br_err = new BufferedReader(new
InputStreamReader(pr.getErrorStream()));
String buff = null;
while ((buff = br_err.readLine()) != null) {
System.out.println(buff);
try {Thread.sleep(100); } catch(Exception e) {}
br_err.close();
catch (IOException ioe) {
System.out.println("Exception caught printing process error.");
ioe.printStackTrace();
}).start();
catch (Exception ex) {
System.out.println(ex.getLocalizedMessage());
public static boolean isWindows() {
if (System.getProperty("os.name").toLowerCase().indexOf("windows") != -1)
return true;
else
return false;
-- PL/SQL wrapper to publish java method.
CREATE OR REPLACE PROCEDURE host_command (p_command IN VARCHAR2)
AS LANGUAGE JAVA
NAME 'Host.executeCommand (java.lang.String)';
these are the grants I am issuing on install:
BEGIN
DBMS_JAVA.grant_permission ('LOANADMIN', 'java.io.FilePermission',
'<>', 'read ,write, execute, delete');
DBMS_JAVA.grant_permission ('LOANADMIN', 'SYS:java.lang.RuntimePermission',
'writeFileDescriptor', '');
DBMS_JAVA.grant_permission ('LOANADMIN', 'SYS:java.lang.RuntimePermission',
'readFileDescriptor', '');
END;
-- and this is the block I am using to execute the OS command..
1 BEGIN
2 host_command (p_command => 'DEL C:\PRETEND.TXT');
3* END;
SQL> /
PL/SQL procedure successfully completed.
Everything returns as successfully completed. But the file is not deleted from the server. I know im missing some kind of privilege. Can anyone help me? Thanks
Mo

Answer 1

Burleson consulting...
Says it all. Exposure on the Net doesn't mean quality.
Burleson code usually has not been tested, is not robust, and quite often doesn't work.
Why didn't you implement run_cmd, as suggested earlier?
THAT works!
Sybrand Bakker
Senior Oracle DBA