Calling a Host Command

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

> [email protected]
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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?

Similar Messages

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?
rdbms: 11.1.0.7, Redhat 4
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;
/

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 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

Calling host commands

Hello All;
Is it possible to call the host command in Jdeveloper like it's called in Oracle Form such as host(command_1,NO_SCREEN)?
Thanks in advance for your reply.
TD

Try the Runtime.exec method
http://java.sun.com/j2se/1.4.2/docs/api/java/lang/Runtime.html

Call HOST command FROM FORMS 4.5 AND 6.0

I have a problem that I found out about yesterday, and have no idea how to fixe it.
I created a form to run on form 4.5.9.7 In this form i call up the host command, but it does not work properly, because by using the host oracle stops there until i close the application that i called with the host, it hangs there. But now it doesn't do it, once the host is executed, it continues the rest of the code that i have, which should not.
On the same computer i created another form on forms 6.0.5.2 and call the host command again, and finally it worked perfect! I mean until the program called by host command is running forms does not continue, it hangs there.
Could someone explains me that please, is there some patch I need on forms 4.5?
null

We converted forms from 4.5 to 6.0. Basically all you have to do is recompile the forms. but, the very first thing you have to do is recompile all the libraries. The forms will not work if you don't recompile the libraries first. So, open and compile the libraries in 6.0, then open and compile the forms in 6.0. They should then work fine. If they do not, try deleting and reattaching the libraries and compile again.
Good luck.

Using the Host command

Hi,
I'm running windows 2000 O/S on my desktop to connect to an IBM AIX server to run Forms6. If you call the host command from within forms, does it go to the my desktop (client) or to AIX (server). Also, if I need a username and password to log onto AIX will I be prompted to for the username and password by the OS after issuing the host command? Please provide example if you can.
Thanks,
Leonard905

When you execute a HOST command the code is executed on the machine on which your Forms engine is running.
In client server this will be the client.
In Web deployed Forms this will be the middle tier application server.
Regards
Grant Ronald
FOrms Product Management

Within SQL*Plus, get error code of host command

Hello everyone,
I am currently writing an SQL*Plus (Oracle 10g) that has a big logic and somewhere in the middle, I have to call a host command, which is an C++ function.
I call it using
SQL> HOST cd
SQL> HOST cd bins
SQL> HOST ./my_procedureBut, I need to get the return code of my procedure to see if it finished correctly?
I checked [the manual|http://download.oracle.com/docs/cd/B19306_01/server.102/b14357/ch4.htm#sthref883] but they don't say anything about return codes.
When I try:
SQL> host echo $?
0It always returns 0, even if I SIGTERM or SIGKILL the child process. Anyone has an idea on how is it possible to retrieve the return code?
Thanks

user13117585 wrote:
Hello guys and thanks for your answers.
Let me tell you a little more about my problem... I have a 3 steps process. The first step is done in the database. It updates a few tables. Then, when that step successfully ends, I need to start a second step. That second step is done on the server where I have my SQL Plus session. Because I actually have 2 different machines. The first one is where the database is running and the second one where I have SQL Plus (Oracle client 10g) and the program that I have to start in this second step. Then, once this process is finished and his return code is 0, then I have to execute the third step in the database.
Basically, I wanted to have something like:
VARIABLE returnCode
BEGIN
:returnCode := some_package.do_step_1;
-- do whatever I want with returnCode.
EXCEPTION WHEN ...
END;
HOST execute_external_program
BEGIN
IF external_job_succeed THEN
some_package.do_step_3
END IF;
EXCEPTION...
END;
/I wanted to use the Oracle Scheduler to create an EXTERNAL JOB. The problem is that the external program is not deployed on the same machine as the database.I know that on 11g, we have external remote jobs. But I'm on 10g and I have no agent on the server where the external program is. So, what are my options? SQL*Plus and the host command... Or I can also write a bash script to do that... Or any hight level programming language...
Any other idea?
Thanks again guys,move functionality of second step into PL/SQL procedure resident inside DB.

About running host command

Hi,
Suppose that I need to run 'zip' in the mean time when running Java, what should I use for calling such host command from O/S?
Thks & Bst Rgds,
Huamin

Runtime.exec()

Calling SQL Loader from Forms 4.5 using HOST command in Win2000

One of my forms calls SQL Loader 7.3 using HOST command to load a csv file onto the database(Oracle 7.3) under Windows 2000 platform.
Only after sql loader finishes its operation the control should come to my form i.e. synchronous execution.
As of now its running asynchronously.
Is there any way to make it synchronous. If Not any other work arounds?
Environment Details
Forms [32 Bit] Version 4.5.10.6.0 (Production)
Windows 2000 Operating System
Oracle7 Release 7.3.2.3.2

Forms6i running on W2000, Rdbms 8.1.7
in Forms I added a button TEST,
Trigger when-button-pressed : host('test.bat') ;
in directory .......\frm I added file test.bat :
REM ===============
cd /d C:\........\ldr
pause
sqlldr parfile=test.par
pause
type test.log
pause
exit
REM ================
now, pressing TEST button opens DOS window, telling me what's going on, running sqlldr, finally going back to forms
Are you using NO_PROMPT or NO_SCREEN option of HOST command ?
Had a look at Forms 4.5 manuals, there is no mentioning of (a)synchronously operation in connection with HOST command.

Problem using Host command to call a batch file

Hi all,
I am trying to call a batch file with the Host command:
host c:\test\u.bat
where u.bat calls unix2dos.exe with a parameter of d_unix.txt.
Bat file looks like this:
C:\test\unix2dos.exe d_unix.txt
PAUSE
The bat file gets called fine, but the following error occurs (in the cmd prompt):
T:\globals\ORACLE8\bin>C:\test\unix2dos.exe d_unix.txt
d_unix.txt:
Can't open file
T:\globals\ORACLE8\bin>PAUSE
Press any key to continue . . .
Running the batch file directly in windows works fine. The batch file also runs fine from the Host command if I remove the d_unix.txt parameter.
The file d_unix.txt file is in the same directory as the batch file and as unix2dos.exe.
Running from Sql Plus in a windows environment.
Any thoughts?
Edited by: dgouin on Aug 19, 2009 11:41 AM
Edited by: dgouin on Aug 19, 2009 11:42 AM
Edited by: dgouin on Aug 19, 2009 11:42 AM

I always understood that it worked with whatever directory you were in when you launched the SQL*Plus binary:
D:\>SQLPLUS dbuser@testdb
SQL*Plus: Release 10.2.0.4.0 - Production on Wed Aug 19 15:26:35 2009
Copyright (c) 1982, 2007, Oracle. All Rights Reserved.
Enter password:
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
dbuser@testdb > HOST ECHO %CD%
D:\
dbuser@testdb > exit
Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
D:\>H:
H:\>SQLPLUS dbuser@testdb
SQL*Plus: Release 10.2.0.4.0 - Production on Wed Aug 19 15:27:03 2009
Copyright (c) 1982, 2007, Oracle. All Rights Reserved.
Enter password:
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
dbuser@testdb > HOST ECHO %CD%
H:\
dbuser@testdb > exit
Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

When use host command to call discoverer

hi all
i am using the host command in forms 6i to call open
the discoverer by command line . its fine and works well
but the discoverer locks the screen and i cant work with both of them so i have to close the discoverer and i cant leave it open .
can solve this problem ?

Use API d2kwutil
PROCEDURE proc_call_disc IS
declare
nm_command varchar2(10000);
nm_user varchar2(20);
pw_user varchar2(20);
cn_user varchar2(20);
BEGIN
nm_user := get_application_property( username );
pw_user := get_application_property( password );
cn_user := get_application_property( connect_string );
nm_command := 'dis4usr /connect ' || nm_user || '/' || pw_user || '@' || cn_user||' /opendb "owner.'||v_nome_bis||'" /sheet '||v_sheet||' '||string_parametros;
win_api_shell.winexec(nm_command, WIN_API.SW_SHOWMAXIMIZED, false);
END;

Calling SQL Loader using HOST command from Developer Forms 4.5

I want to execute a set of code from D2K Forms 4.5 which has interfface with Client - OS ( In my case Windows NT/XP). I want to execute SQL Loader from Forms using Host Command and then after completion of that process, I want to do next transcations ( depending upond success of HOST/SQL Loader).
How to achive this?
I tried writing code like this ...
l_vc_command := 'sqlldr73'
                    ||' USERID='||l_vc_username||'/'||l_vc_password||'@'||l_vc_connect_string
                    ||' CONTROL='||l_vc_filepath||'Upload.ctl'
                    ||' DATA='||LTRIM(RTRIM(l_vc_fileloc))
                    ||' LOG='||l_vc_filepath|| l_vc_log_file || '_' || l_dt_sysdate_str ||'.log'
                    ||' BAD='||l_vc_filepath|| l_vc_bad_file || '_' || l_dt_sysdate_str ||'.bad'
                    ||' DISCARD='||l_vc_filepath|| l_vc_discard_file || '_' || l_dt_sysdate_str ||'.dsc';
HOST(l_vc_command,NO_PROMPT);
After this command i want to do some other code execution. so even if it fails or success, next code is executed. How to control this?
Please help..
Regards,
Milind

Forms6i running on W2000, Rdbms 8.1.7
in Forms I added a button TEST,
Trigger when-button-pressed : host('test.bat') ;
in directory .......\frm I added file test.bat :
REM ===============
cd /d C:\........\ldr
pause
sqlldr parfile=test.par
pause
type test.log
pause
exit
REM ================
now, pressing TEST button opens DOS window, telling me what's going on, running sqlldr, finally going back to forms
Are you using NO_PROMPT or NO_SCREEN option of HOST command ?
Had a look at Forms 4.5 manuals, there is no mentioning of (a)synchronously operation in connection with HOST command.

Forms HOST command no longer works after database upgrade from 10g to 11g

Hi,
After upgrading the database 10g to 11g the forms HOST command no longer works on Unix server. The form used to work fine prior the upgrade. I read all the threads I could find and did not see any solutions. Adding PATH and LD_LIBRARY_PATH does not work because it does not even run a basic shell script. (I saw this solution, adding PATH and LD_LIBRARY_PATH, in many questions / threads).
1. I wouldn't expect the database upgrade to be an issue, but it is the only change we had.
2. Note, 11g is Oracle Fusion Middleware which is quite a bit different than 10g.
I even tried the most basic commands like "echo" which is a build-in Unix command and there is no directory for it (ie. no /usr/bin - so variable PATH is irrelvent). i.e HOST('echo hi'); and HOST('echo "hi" '); and even HOST ('echo hi > /my_file.txt'); all returns FORMS_FAILURE (actually the if is IF FORM_SUCCESS THEN ... else ... and the else part always runs now - whereas it didn't before.).
Or basic commands like /usr/bin/ls as in HOST(/usr/bin/ls). At that point I was just testing the Unix command would return FORM_SUCCESS even though I could not see the results (because they weren't writing to a log file). Notice that I'm using the direct path /usr/bin so no Unix environment variables were needed.
The form does use webutil but that part works. For example, we have webutil_file_transfer( ....) The file shows up on the application server and in the expected directory.
Here's the main goal. Upload a file from clients local PC to the datebase server. The form uploads the file to the Application server, then we have a Unix script to scp (secure copy) the file from the application server to the database server. IF webutil, or any other Oracle functions could put the file on the database server that would be better. But, I don't know of any procedures that do that - or would have done it cleanly (i.e. storing to database and write back to server and then using a blob etc. )
Anyway, I was hoping someone would help with either of these.
1) Get the HOST command to work. - If we can get that to work then I wouldn't need any more help. We can just call the already existing Unix script to copy the file from the application server to the database.
2) OR be able to upload directly to the database server - wanted to do that originally
Any help would be appreciated

Solution for those interested and for anyone else searching this forum for a solution
I found this on My Oracle Support:
<h3>Host Command from Forms Not Working in 11g in Sun Solaris Sparc OS [ID 1157346.1]</h3>
Applies To: Oracle Forms - Version 11.1.1.1.0 and later
Sun SPARC Sun OS
Symptoms:
When trying to execute a Shell script or any OS command using the host() Built-in from Forms 11g, the host()command is not getting executed. The same functionality works on other operating systems and in previous versions like 10gR2.
Steps to be followed:
1) Take a backup and edit the $DOMAIN_HOME/config/fmwconfig/servers/WLS_FORMS/applications/formsapp_11.1.1/config/default.env or any custom environment file.
2) Locate the following environment variable:
LD_PRELOAD=/ora10gas/app/11.1.0/Middleware/as_1/jdk/jre/lib/sparcv9/libjsig.so
3) Comment out this variable. After the changes, it will look like the following:
#LD_PRELOAD=/ora10gas/app/11.1.0/Middleware/as_1/jdk/jre/lib/sparcv9/libjsig.so
3) a) Instead of LD_PRELOAD, kindly use LD_PRELOAD_64 as given below :
LD_PRELOAD_64=/ora10gas/app/11.1.0/Middleware/as_1/jdk/jre/lib/sparcv9/libjsig.so
(This makes HOST AND RUN_REPORT_OBJECT work fine).
4) Save the file and execute your forms. The Host() built-in will work as expected
The LD_PRELOAD setting in default.env is only required for the working of signal chaining facility in JVM version 1.5 and later. If you are not using theSignal chaining facility, this variable is not required. For more information, refer to the following documentation
http://download.oracle.com/docs/cd/E14571_01/doc.1111/e14772/forms.htm#CJAJGAFF

How to run a script from Oracle Form (Beside using HOST command)

I would like to run a script from Forms 6.0. I know that we can actually issue this command :
host('plus80.exe' username/password@connect_string @c:\scriptname);
BUT, is there any other alternative ?

Sqlplus is a different program, so one way or the other you have to leave Forms to run sqlplus. What is you objection against HOST?
You can also run sqlplus from the database, but again you need a stored java procedure to call sqlplus (sort of HOST command that runs in the database).
Francois' solution works if your script just has a query to run, but if you have specific sqlplus commands (spool etc.) forms_ddl is probably not a solution.

Calling a Host Command

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