How to call a host command/program within a PL/SQL Procedure OR Block

Hello ,
I want to call a host program (in my case it is unix shell program) from within a PL/SQL
Procedure..Please let me know if you have a clue...Thanks a bunch...Ajeet

Alternatively you could create a PL/SQL procedure that wraps a Java Runtime object.
You can find an example of this in the Ask Tom column of Oracle Magazine. You can get there from OTN home page. Type "Java Runtime" into the Search Archive engine.
HTH, APC

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PL/SQL Procedure Calling Java Host Command Problem

This is my first post to this forum so I hope I have chosen the correct one for my problem. I have copied a java procedure to call Unix OS commands from within a PL/SQL procedure. This java works well for some OS commands (Eg ls -la) however it fails when I call others (eg env). Can anyone please give me some help or pointers?
The java is owned by sys and it looks like this
CREATE OR REPLACE AND COMPILE JAVA SOURCE NAMED "ExecCmd" AS
//ExecCmd.java
import java.io.*;
import java.util.*;
//import java.util.ArrayList;
public class ExecCmd {
static public String[] runCommand(String cmd)
throws IOException {
// set up list to capture command output lines
ArrayList list = new ArrayList();
// start command running
System.out.println("OS Command is: "+cmd);
Process proc = Runtime.getRuntime().exec(cmd);
// get command's output stream and
// put a buffered reader input stream on it
InputStream istr = proc.getInputStream();
BufferedReader br = new BufferedReader(new InputStreamReader(istr));
// read output lines from command
String str;
while ((str = br.readLine()) != null)
list.add(str);
// wait for command to terminate
try {
proc.waitFor();
catch (InterruptedException e) {
System.err.println("process was interrupted");
// check its exit value
if (proc.exitValue() != 0)
System.err.println("exit value was non-zero: "+proc.exitValue());
// close stream
br.close();
// return list of strings to caller
return (String[])list.toArray(new String[0]);
public static void main(String args[]) throws IOException {
try {
// run a command
String outlist[] = runCommand(args[0]);
for (int i = 0; i < outlist.length; i++)
System.out.println(outlist);
catch (IOException e) {
System.err.println(e);
The PL/SQL looks like so:
CREATE or REPLACE PROCEDURE RunExecCmd(Command IN STRING) AS
LANGUAGE JAVA NAME 'ExecCmd.main(java.lang.String[])';
I have granted the following permissions to a user who wishes to run the code:
drop public synonym RunExecCmd
create public synonym RunExecCmd for RunExecCmd
grant execute on RunExecCmd to FRED
grant javasyspriv to FRED;
Execute dbms_java.grant_permission('FRED','java.io.FilePermission','/bin/env','execute');
commit
Execute dbms_java.grant_permission('FRED','java.io.FilePermission','/opt/oracle/live/9.0.1/dbs/*','read, write, execute');
commit
The following test harness has been used:
Set Serverout On size 1000000;
call dbms_java.set_output(1000000);
execute RunExecCmd('/bin/ls -la');
execute RunExecCmd('/bin/env');
The output is as follows:
SQL> Set Serverout On size 1000000;
SQL> call dbms_java.set_output(1000000);
Call completed.
SQL> execute RunExecCmd('/bin/ls -la');
OS Command is: /bin/ls -la
total 16522
drwxrwxr-x 2 ora9sys dba 1024 Oct 18 09:46 .
drwxrwxr-x 53 ora9sys dba 1024 Aug 13 09:09 ..
-rw-r--r-- 1 ora9sys dba 40 Sep 3 11:35 afiedt.buf
-rw-r--r-- 1 ora9sys dba 51 Sep 3 09:52 bern1.sql
PL/SQL procedure successfully completed.
SQL> execute RunExecCmd('/bin/env');
OS Command is: /bin/env
exit value was non-zero: 127
PL/SQL procedure successfully completed.
Both commands do work when called from the OS command line.
Any help or assistance would be really appreciated.
Regards,
Bernard.

Kamal,
Thanks for that. I have tried to use getErrorStream and it does give me more info. It appears that some of the commands cannot be found. I suspected that this was the case but I am not sure about how this can be as they all appear to reside in the same directory with the same permissions.
What is more confusing is output like so:
SQL> Set Serverout On size 1000000;
SQL> call dbms_java.set_output(1000000);
Call completed.
SQL> execute RunExecCmd('/usr/bin/id');
OS Command is: /usr/bin/id
exit value was non-zero: 1
id: invalid user name: ""
PL/SQL procedure successfully completed.
SQL> execute RunExecCmd('/usr/bin/which id');
OS Command is: /usr/bin/which id
/usr/bin/id
PL/SQL procedure successfully completed.
Regards,
Bernard

How to call Operating System commands / external programs from within APEX

Hi,
Can someone please suggest how to call Operating Systems commands / external programs from within APEX?
E.g. say I need to run a SQL script on a particular database. SQL script, database name, userid & password everything is available in a table in Oracle. I want to build a utility in APEX where by when I click a button APEX should run the following
c:\oracle\bin\sqlplusw.exe userud/password@database @script_name.sql
Any pointers will be greatly appreciated.
Thanks & Regards,

Hi Guys,
I have reviewed the option of using scheduler and javascript and they do satisfy my requirements PARTIALLY. Any calls to operating system commands through these features will be made on the server where APEX is installed.
However, here what I am looking at is to call operating systems programs on client machine. For example in my APEX application I have constructed the following strings of commands that needs to be run to execute a change request.
sqlplusw.exe user/password@database @script1.sql
sqlplusw.exe user/password@database @script2.sql
sqlplusw.exe user/password@database @script3.sql
sqlplusw.exe user/password@database @script4.sql
What I want is to have a button/link on the APEX screen along with these lines so that when I click that link/button this entire line of command gets executed in the same way it would get executed if I copy and paste this command in the command window of windows.
Believe me, if I am able to achieve what I intend to do, it is going to save a lot of our DBAs time and effort.
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How to call a Standard SAP Program in Zprogram.

Hi,
how to call a SAP Standard program in SAP Program?
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Again, ABAP related questions should be asked in the ABAP forum.
To answer you question, if the standard program is a report program, you can use the SUBMIT statement and pass parameters using the WITH Extention.
Submit <report>
with p_fld = 'X'
and return.
Please make sure to award points for helpful answers and mark your posts as solved when solved completely. Thanks.
Regards,
RIch Heilman

Calling a Host Command

Dear Friends,
Is it posible to call a host command (windows) from PLSQL (Oracle 9i) ?
Thanks.
Jai

> [email protected]
[email protected]
[email protected]
So.. the one who dies with the most e-mail addresses wins?
Or what exactly is the purpose of posting all your e-mail addresses - besides as food for web bot e-mail harvesters used by spammers?

How to call unix script/command in ODI

Hello Gurus,
Please let me know how to call unix script/command in ODI?
Thanks
Shridhar

you can call shell script using the OS command found in Package.
Step 1. Drag the OS Command in the Packgae
Step 2. In the Text mentiond call the script say for ex sh /opt/path/script.sh
Step 3. Execute.
Note : Make sure the User through which ODI is triggering does have the required permission to execute shellscript , also always provide the full path , since scripts are execute from the oracldi/bin folder so its necessary to provide the complete path of the script location.
Hope this helps.

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Hello everybody,
I want to pass an unix command from a Report. I am running the report (Report 2.5) on an Unix server and I want to pass a unix host command inside the Before Report Trigger of the report. But Report2.5 is not recognising the HOST built-in. Is there is any way around?
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First off is that openssl command correct? Should it be this instead:
openssl pkcs8 -inform der -nocrypt -in test.der -out result.pem
Try out your openssl command within a command prompt so that you know that it works ok. I think the command line you specified waits on stdin (well it does for me).
After that.....
runtime.exec creates a Process object. If you do this:
Process openssl = runtime.exec("....")
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Calling java host command in trigger/PLSQL

I created a java call to execute a linux host command that calls a shell script that will echo out a result. It is owned by SYS and has granted execute to SYSTEM. SYSTEM has a table that monitors accesses to the RDBMS. When a user logs on from a remote server vis sqlplus, this LOGON trigger write to the SYSTEM table (successfully). SYSTEM has a trigger that runs a linux command to execute a shell script that pulls the actual IP address from the remote system. I can run this call from a PLSQL block (outside the trigger) and get a response back like "user:101.101.101.111" but when I have the same user log on, the trigger fires - no errors or exceptions yet no rows are returned. Is there some restriction in a trigger versus just a plsql block call? The java code used is what I found on (http://www.oracle-base.com/articles/8i/ ... mPLSQL.php) and it works perfectly OUTSIDE the trigger but nothing is returned in the trigger firing steps. Any idea?
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I know the code works because I can write the host command output to a file. Later in the trigger I can open the file and can read the data that should have been returned in the java host call.

FYI - here is the code from your site that I used:
DROP JAVA SOURCE SYS."Host";
CREATE OR REPLACE AND RESOLVE JAVA SOURCE NAMED SYS."Host" as import java.io.*;
public class Host {
public static void executeCommand(String command) {
try {
String[] finalCommand;
if (isWindows()) {
finalCommand = new String[4];
// Use the appropriate path for your windows version.
finalCommand[0] = "C:\\windows\\system32\\cmd.exe"; // Windows XP/2003
//finalCommand[0] = "C:\\winnt\\system32\\cmd.exe"; // Windows NT/2000
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);
pr.waitFor();
new Thread(new Runnable(){
public void run() {
BufferedReader br_in = null;
try {
br_in = new BufferedReader(new InputStreamReader(pr.getInputStream()));
String buff = null;
while ((buff = br_in.readLine()) != null) {
System.out.println("Cmd results: " + buff);
try {Thread.sleep(100); } catch(Exception e) {}
br_in.close();
catch (IOException ioe) {
System.out.println("Exception caught printing process output.");
ioe.printStackTrace();
finally {
try {
br_in.close();
} catch (Exception ex) {}
}).start();
new Thread(new Runnable(){
public void run() {
BufferedReader br_err = null;
try {
br_err = new BufferedReader(new InputStreamReader(pr.getErrorStream()));
String buff = null;
while ((buff = br_err.readLine()) != null) {
System.out.println("Cmd Error: " + buff);
try {Thread.sleep(100); } catch(Exception e) {}
br_err.close();
catch (IOException ioe) {
System.out.println("Exception caught printing process error.");
ioe.printStackTrace();
finally {
try {
br_err.close();
} catch (Exception ex) {}
}).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;
/

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My program is here in two directories.Let
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I have a requirment where need to call a oracle form from within the Oracle APEX application?
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Thanks

Hi,
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How do I know HOST command status?

Hi Guys,
I am running a shell script at middle tier (on application server) from web forms using HOST command.
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How to call a host command/program within a PL/SQL Procedure OR Block

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