PL/SQL to execute exe file with parameters from DB

Question

Hi all,
I have a bit of a problem.
I am in need to write all Logon, Logoff and Logon fail data onto the Windows Application Log. To do this I already tried various solutions but with my configuration (Oracle EE 10.2.0.4 and Windows Server 2003 R2 X64) the only possible solution (apparently) is the following.
I create a Table with the info I need:
CREATE TABLE logonaudittable
event VARCHAR2(15),
sid NUMBER,
serial# NUMBER,
orario DATE,
username VARCHAR2(30),
osuserid VARCHAR2(30),
machinename VARCHAR2(64)
I create a trigger for Logon Data, one for Logoff and one for Logon Fail:
LOGON trigger.
CREATE OR REPLACE TRIGGER logonauditing AFTER LOGON ON database
DECLARE
machinename VARCHAR2(64);
osuserid VARCHAR2(30);
v_sid NUMBER(10);
v_serial NUMBER(10);
CURSOR c1 IS
SELECT sid, serial#, osuser, machine
FROM v$session WHERE audsid = userenv('sessionid');
BEGIN
OPEN c1;
FETCH c1 INTO v_sid, v_serial, osuserid, machinename;
INSERT INTO logonaudittable VALUES ( 'LOGON', v_sid, v_serial, sysdate,
user, osuserid, machinename );
CLOSE c1;
END;
LOGOFF trigger
CREATE OR REPLACE TRIGGER logoffauditing
BEFORE LOGOFF ON database
DECLARE
machinename VARCHAR2(64);
osuserid VARCHAR2(30);
v_sid NUMBER(10);
v_serial NUMBER(10);
CURSOR c1 IS
SELECT sid, serial#, osuser, machine
FROM v$session WHERE audsid = userenv('sessionid');
BEGIN
OPEN c1;
FETCH c1 INTO v_sid, v_serial, osuserid, machinename;
INSERT INTO logonaudittable VALUES ( 'LOGOFF', v_sid, v_serial, sysdate,
user, osuserid, machinename );
CLOSE c1;
END;
LOGON FAIL trigger
CREATE OR REPLACE TRIGGER logonfailauditing
AFTER SERVERERROR ON database
DECLARE
machinename VARCHAR2(64);
osuserid VARCHAR2(30);
v_sid NUMBER(10);
v_serial NUMBER(10);
CURSOR c1 IS
SELECT sid, serial#, osuser, machine
FROM v$session WHERE audsid = userenv('sessionid');
BEGIN
IF (IS_SERVERERROR(1017)) THEN
OPEN c1;
FETCH c1 INTO v_sid, v_serial, osuserid, machinename;
INSERT INTO logonaudittable VALUES ( 'FAILLOGON', v_sid, v_serial, sysdate,
user, osuserid, machinename );
CLOSE c1;
END IF;
END;
The I create a trigger that starts every time something is written on the table.
This trigger needs to start an EXE file that writes the latest data written on the table into the Windows Application Log.
So I need a trigger that executes my WRITELOG.EXE file adding the parameters. For example:
Execute WRITELOG.EXE event sid orario username
So my program will write a Log in Windows with this data:
Event: LOGON
Sid: 2938473
Orario: 12/12/2011 11:45:32
Username: Scott
And so on.
I already have the program that does this, I need to execute the program with the right data directly from trigger or from a procedure executed by my trigger.
Hope I've been clear and REALLY hope someone can help me!!!
Thank you all!

Answer 1

The java and PL/SQL you need to set up is in the very first response in the link. (I don't have a windows Oracle DB DBMS_JAVA to try it myself). Change the UNIX command '/usr/bin/ls' to your Windows command 'c:\yourdirectory\FILE.EXE'. Assuming you created everything and set permissions as Tom describes (later in the thread), your PL/SQL call in your trigger might look something like this:
CREATE OR REPLACE TRIGGER logonauditing AFTER LOGON ON database
DECLARE
machinename VARCHAR2(64);
osuserid VARCHAR2(30);
v_sid NUMBER(10);
v_serial NUMBER(10);
CURSOR c1 IS
SELECT sid, serial#, osuser, machine
FROM v$session WHERE audsid = userenv('sessionid');
BEGIN
OPEN c1;
FETCH c1 INTO v_sid, v_serial, osuserid, machinename;
INSERT INTO logonaudittable VALUES ( 'LOGON', v_sid, v_serial, sysdate,
user, osuserid, machinename );
RUN_CMD('c:\yourdirectory\FILE.EXE LOGON '||v_sid||' '||v_serial||' '||to_char(sysdate,'MM/DD/YYYY')||' '||user||' '||osuserid||' '||machinename);
CLOSE c1;
END;
Since you want to log what the trigger is writing to the table, you can call the executable with the same information you are writing, instead of writing then reading it back out again.