HOST COMMAND ON LINUX

hi all
i'm trying to execute a host command from the oracle form on linux operating system. all commands are executed under the linux user OPS$THIN . i want to change this user. i tried a shell script to change the user i.e: switch user (SU) and it did not work. i checked the script privileges and it's 777.
plz help
thanx

Hi Francois
Yes that user has all the rights. To prove that I have the following code
declare
in_file text_io.file_type;
linebuf varchar2(200);
infile1 text_io.file_type;
begin
/*host ('/bin/sh /u01/apps/nucleus/a.sh',screen);
if NOT Form_Success then
message('failed ');pause;
else
message('Form_Success');pause;
end if;*/
in_file := Text_IO.Fopen('/u01/apps/a.txt', 'r');
infile1 := Text_IO.Fopen('/u01/apps/a1.txt', 'w');
Text_IO.Get_Line(in_file,linebuf);
text_io.fclose(in_file);
text_io.put_line(infile1,linebuf);
text_io.fclose(infile1);
End;
Now a1.txt created.
Thanks
Muthu

Similar Messages

Host command on linux with forms 10g

Dear Experts
i have one major problem as i have made a form in forms 10g to upload .dmp files copied in application server my problem is that when i excute host command like bellow
cmdln := './imp.sh'
host(cmdln)
to excute and run shell script saved on application server which runs an imp command to upload all files copied in specified location but nothing is happening when i click on button as these command are fired on when button click trigger plzzz help its urgent
were i can make mistake

Whoa...please don't use txt speak when posting here; it is very hard to read and right now it took me about 5 minutes to understand what you have written. Please write proper sentences; help us to help you ; )
It is a good idea to have exact the same verison of exp / imp then your database version; Forms 10.1.2.0.2 would be compatible with a 10.1 database. If your database is e.g. 10.2 you'd need to install the 10.2 client software on your application server anyway. You wouldn't need to care about this when using datapump.
And another thing regarding datapump: conventional export is deprecated in 11.2 so one day or another your customers will need to move to datapump; the sooner the better.
As said: try to run your script on the shell without forms and see if this works. You would see error messages generated by your shell script too.
cheers
Edited by: christian erlinger on 19.05.2011 01:14
that damn smileys don't work anymore

Host command on Linux not working

I am running forms10g (Mid tier is Linux and client is windows 2000) with the following code in when-button-pressed
host ('/bin/sh /u01/apps/a.sh',screen);
if NOT Form_Success then
message('failed ');pause;
else
message('Form_Success');pause;
end if;
a.sh contains
cp /u01/apps/a.txt /u01/apps/a1.txt
and i am always getting the message('failed'). nothing show up on the screen, anything wrong in the code ?
Thanks
Muthu

Hi Francois
Yes that user has all the rights. To prove that I have the following code
declare
in_file text_io.file_type;
linebuf varchar2(200);
infile1 text_io.file_type;
begin
/*host ('/bin/sh /u01/apps/nucleus/a.sh',screen);
if NOT Form_Success then
message('failed ');pause;
else
message('Form_Success');pause;
end if;*/
in_file := Text_IO.Fopen('/u01/apps/a.txt', 'r');
infile1 := Text_IO.Fopen('/u01/apps/a1.txt', 'w');
Text_IO.Get_Line(in_file,linebuf);
text_io.fclose(in_file);
text_io.put_line(infile1,linebuf);
text_io.fclose(infile1);
End;
Now a1.txt created.
Thanks
Muthu

Host command is not working on linux

Hi
I m using linux for application server n windows for client. I need to create folder from client machine by cliking a button of forms10g runtime.HOST command is not working which was working fine in windows.
Any help is appriciateable.
kazi mokarem

Hi
I had the same issue on linux a few weeks back. What tuned out was, when you install the Oracle app svr it does not include the system paths by default.
The path where mkdir is located may not be visible to the app.
Try to hardcode the path for mkdir as /bin/mkdir .... and seee if that works.
If the above statement works then add that path in the paths variable in default.env file located in $ORACLE_HOME/forms/server directory
HTH
Arvind

HOST command does not seem to work in deployment system

I am developing forms software for a SUSE Linux system, but the HOST command does not seem to operate correctly when used in conjunction with Application Server.
All I am trying to do is launch Adobe Acrobat reader as a background job using the command :-
HOST('/opt/Adobe/Reader8/bin/acroread &');
but nothing seems to happen.
If I enter the command :-
*/opt/Adobe/Reader8/bin/acroread &*
directly from a shell window (using the same login account) the command works correctly.
I have tried other commands e.g. directory listings etc and all seem to have the same problem.
Furthermore when the same form is run from the development environment using "Internet Developer Suite" it operates correctly with no problems.
I am running on a deployment system where all three tiers of oracle are on the same machine (i.e. Database, AS and web front end).
Can anybody suggest any possible causes or anything I can try to help resolve this problem ?

brian_a_j wrote:
Although I still dont understand why HOST would not work given my configuration (the Application Server and Web Browser operate on the same machine).One little test, put the execution command in a shell script and try to execute the script with the HOST command instead of the command itself.
Using HOST the script will be executed on the AS machine no matter from where it is executed.
Tony

Host Command does not come back

Hi,
I have treid to export schema by pressing a button, (form designed in Form10gR2 and excute via Application Server R2. )
For this I have applied one by one these syntaxes
1) host ( 'cmd /C start "" "'|| exp USERID=SYSTEM/MANAGER@ora11 OWNER=scott,hr FILE=E:\JAN10.DMP');
2) host ( 'cmd /C exp USERID=SYSTEM/MANAGER@ora11 OWNER=scott,hr FILE=E:\JAN10.DMP');
3) client_host('exp USERID=SYSTEM/MANAGER@ora11 OWNER=scott,hr FILE=E:\JAN10.DMP');
4) WEBUTIL_HOST.NONBLOCKING('exp USERID=SYSTEM/MANAGER@ora11 OWNER=scott,hr FILE=E:\JAN10.DMP');
When my client/ user executes the command, session goes hang and application screen does not come back. If I execute the exp command directly from the Application Server Command Prompt then exp works.
Please help me, what is the syntax to get the dump wihtout hanging the session.
Database 11g Linux
Application Server 10R2 Window2003.
Developer 10gR2.
Client Windows , Explorer, FireFox etc.
Regards.
Priya.

Hi Priya,
It is always a better practice to call a batch file using the host command instead of hardcoding the command inside form. Which would help you to modify the batch file for any changes, without re-compiling the forms.
In this case, create a batch script, which would set the ORACLE_HOME etc (to make sure the exp command is recognized, you need to add the DB ORACLE_HOME/bin to the PATH), and then call the command to export. You can also parameterize the batch script and pass the parameters from form, separated by space.
-Arun

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;
/

Host command output how do i get in forms

how do i read output of host command in forms.
l_cmd := host('which rm'); -- if u run on linux it returns /bin/rm on unix /usr/bin
l_cmd := l_cmd || ' -f '|| file_name;
host(l_cmd,no_screen);
command on linux look like /bin/rm -f filename.txt
on unix -> /usr/bin/rm -f filename.txt
how can i do this.

I found this in the forum, which might help you
http://forums.oracle.com/forums/thread.jspa;jsessionid=8d92200630de63aea3a17b9d4c7cb6ffc3714fdd2ce2.e34Tb34Lb34PbO0Lb3eTahiPbNyTe0?messageID=569031&#569031

Trouble Running Host Command

Hello folks I am trying to create a procedure to run linux host commands. I have found and used code available throughout the internet and it compiles and runs, but no matter what command I send to the host I get a 'Not Found' exception, even if I send as the command the full path to the executable. Here is my code:
*1- Java Procedure*
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 (System.getProperty("os.name").toLowerCase().indexOf("windows") != -1) {
finalCommand = new String[4];
finalCommand[0] = "C:\\winnt\\system32\\cmd.exe";
finalCommand[1] = "/y";
finalCommand[2] = "/c";
finalCommand[3] = command;
} else {                              // Linux or Unix System
finalCommand = new String[3];
//finalCommand[0] = "/bin/sh";
//finalCommand[1] = "-c";
//finalCommand[2] = "'" + command + "'";
finalCommand[0] = command;
finalCommand[1] = "";
finalCommand[2] = "";
// Execute the command...
final Process pr = Runtime.getRuntime().exec(finalCommand);
// Capture output from STDOUT...
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("stdout: " + buff);
try {Thread.sleep(100); } catch(Exception e) {}
br_in.close();
} catch (IOException ioe) {
System.out.println("Error printing process output.");
ioe.printStackTrace();
} finally {
try {
br_in.close();
} catch (Exception ex) {}
// Capture output from STDERR...
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("stderr: " + buff);
try {Thread.sleep(100); } catch(Exception e) {}
br_err.close();
} catch (IOException ioe) {
System.out.println("Error printing execution errors.");
ioe.printStackTrace();
} finally {
try {
br_err.close();
} catch (Exception ex) {}
catch (Exception ex) {
System.out.println("Exception: " + ex.getLocalizedMessage());
     ex.printStackTrace();
*2- PL/SQL Package*
CREATE OR REPLACE PACKAGE CIF_HOST_PKG IS
PROCEDURE host (p_command IN VARCHAR2);
END CIF_HOST_PKG;
PROCEDURE host (p_command IN VARCHAR2)
AS LANGUAGE JAVA
NAME 'Host.executeCommand (java.lang.String)';
END CIF_HOST_PKG;
*3- Java Permission*
EXEC Dbms_Java.Grant_Permission('CIF', 'SYS:java.lang.RuntimePermission', 'writeFileDescriptor', '');
EXEC Dbms_Java.Grant_Permission('CIF', 'SYS:java.lang.RuntimePermission', 'readFileDescriptor', '');
exec dbms_java.grant_permission( 'CIF', 'SYS:java.io.FilePermission', '/bin/sh', 'execute' );
exec dbms_java.grant_permission( 'CIF', 'SYS:java.io.FilePermission', '/bin/ps', 'read , execute' );
exec dbms_java.grant_permission( 'CIF', 'SYS:java.io.FilePermission', '/bin/ls', 'read , execute' );
*4- Test Code*
set serveroutput on size 1000000
exec dbms_java.set_output(1000000)
exec CIF_HOST_PKG.host('/bin/ls -l');
*5- Test Output*
anonymous block completed
Exception: Exception during creation of the process: java.io.IOException: '/bin/ls -l' not found
java.io.IOException: Exception during creation of the process: java.io.IOException: '/bin/ls -l' not found
     at java.lang.OracleProcess.start(OracleProcess.java:259)
     at java.lang.ProcessBuilder.start(ProcessBuilder.java:483)
     at java.lang.Runtime.exec(Runtime.java:591)
     at java.lang.Runtime.exec(Runtime.java:464)
     at Host.executeCommand(Host:24)
Any idea on what am I doing wrong?
Thank you in advance,
Andre

Has oracle user permissions to /bin/ls ?
try in sqlplus:
host /bin/ls -lIf not try chmod 777 /bin/lsElse you can try my package http://github.com/xtender/xt_svn
select * from table(XT_SVN_TEST.shell_exec('/bin/ls -l /var/tmp'))Best regards,
Malakshinov Sayan

HOST Command Equivalent In Forms 9i

We are migrating from Forms 5.0 to 9i. The current application is using lot of HOST commands in Forms 5.0.
As we knw HOST command is deprecated in Forms 9i, what method to be followed to recode this feature?
Thanks in advance.

The client_host command that ships with the WebUtil package runs the command on the client workstation in a web deployed environment.
HOST runs the command on the machine where the Forms application/executable is running. This can a number of places:
- When running the later versions (web deployed) this is your application server
- When running GUI Forms in client/server mode this is the client workstation
- When running character bases Forms this is the machine that runs Oracle Forms. That could either be the client itself or a server that you access through telnet.
To come back to your question: client_host cannot be used to execute an operating system command at the database server. Personally, I would use DBMS_SCHEDULER for this an schedule an EXTERNAL JOB to be executed immediately. A Job of type External contains an Operating System command or script that gets executed.
Forms 5.0 is mostly deployed as a GUI client/server application. I don't know if it still supported character mode. Forms 3.0 was a true character mode application (no GUI yet). Forms 4.0 and 4.5 supported GUI and character mode as well.
You state that character mode Forms run on the database server, which is not necessarily true. Character mode Forms can run on whatever machine you want; a client desktop, a central Unix/Linux server or the database server itself. If it doesn't run on your local workstation you just need telnet access to the central server running Forms.
You are correct that client_host is used when migrating from client/server to the web. If you're still running character based Forms on the same server as your database, I would advice using the DBMS_SCHEDULER approach previously described. This keeps you from writing and maintaining a Pro*C program.

Issues with host command

Hi All
We are running Forms 10gR2 under linux. We are having issues with the host command. We use host command to call ProC* modules in the appsvr. It used to work in Forms 6i. Host commnd no longer works in forms10g. Do we need to any setup to run commands using host.
We need to resolve this issue immediately.
any help is appreciated.
Rgds
Arvind Balaraman

Arvind has said the command needs to run on the app server so HOST is correct, not CLIENT_HOST.
I noticed when I installed 10g (on solaris) that the default.env file has a setting for PATH which does not include /usr/bin so HOST would not be able to find standard unix commands, so I added it in:
PATH=/usr/bin:/home/oracle/product/AS101202/bin
Alternatively you could include the full path on any unix commands run by HOST.
Surpisingly I have not seen this documented anywhere. Could this be the problem ?
I have a related problem I have not solved yet. I have one particular HOST command which works OK until after I run reports from forms, then it just stops working without producing any error.

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 HOST command from Report 2.5

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?
Thank in advance.
Samujjwal Basu

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("....")
then you can examine the return code from openssl to see the exit code - for instance if the input file does not exist then exit = 1. You can test for this with Java
Alternatively you could get the stderr from the process and look inside it - if it is 0 length then all is good, if it has some text in there then it has likely failed. You could then throw an exception and include the stderr output in the exception messgae. You may need to experiment with this, runnig it first when openssl is happy then running it again when openssl is upset.
M

Host command in forms 10g

hi all
i am using host command in forms 10g. but it is not executing .
is there any distinct syntax or pre-requirement for executing this command
kindly help
thanks

i am using the following code create a text file in root directory.
the textfile should contain the list of folders,files present in the root directory.
XCMD:=NULL;
XCMD:='CD\' ;
CLIENT_HOST('CMD /C' || XCMD);
XCMD:='dir >C:foldnm.txt' ;
CLIENT_HOST('CMD /C '|| XCMD);
but the file is creating in the specific users directory. ie.
\ documents and settings\username\desktop
kindly help

HOST command not working in forms 10g

Hi,
I have migrated forms 6i to forms 10g, and having a requirement to open sqlplus prompt using a form menu. I have used the below command: -
"host('sqlplus '||user_name||'/'||pass||'@'||sid, no_screen);"
But I am not able to get the sqlplus window, and the main form is still in process for long time, till i bounce the server.
The forms are deployed on Oracle Applications Server 10g and i want to run it on server side.
Please help me with the problem.
Thanks,
Ankit

The deployment architecture is different between forms 10g and forms 6i.
In Forms 6i HOST built-in command will run on the client machine since you are running as client/server, but in WebForms (Forms10g) the HOST built-in command will run on the middle tier which is your application server machine.
In order to run hosts commands in WebForms you need to use webutil and use CLIENT_HOST in the webutil.
check the [Forms 10g R2 Demo|http://download.oracle.com/otndocs/demos/Forms_Demos_10gr2.zip] for sample codes of webutil.
You are using NO_SCREEN in your example, this will hide the window.
Tony
Edited by: Tony Garabedian on Nov 26, 2009 2:43 PM

HOST COMMAND ON LINUX

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