How to call a .exe from PL/SQL?

Question

I have given the following grants for permission and calling CMD.EXE appears to work like shown in below code example.

However, I cannot get any output from whoami.exe. I can see that the default directory is C:\app\oramgr\product\12.1.0\dbhome_1\database\ that appears in the JJJ.TXT file. However, the JJJ_WHOAMI.TXT file contains nothing.

Any suggestions?

dbms_java.grant_permission('PWATSON', 'SYS:java.io.FilePermission', 'C:\WINDOWS\SYSTEM32\CMD.EXE', 'execute');
dbms_java.grant_permission('PWATSON', 'SYS:java.io.FilePermission', 'C:\Windows\System32\whoami.exe', 'execute');
dbms_java.grant_permission('PWATSON', 'SYS:java.lang.RuntimePermission', '*', 'writeFileDescriptor');
dbms_java.grant_permission('PWATSON', 'SYS:java.lang.RuntimePermission', '*', 'readFileDescriptor');

dbms_java.grant_permission('PWATSON', 'SYS:java.io.FilePermission', 'C:\Users\pwatson', 'read, write');
dbms_java.grant_permission('PWATSON', 'SYS:java.io.FilePermission', 'C:\Users\pwatson\*', 'read, write');
dbms_java.grant_permission('PWATSON', 'SYS:java.io.FilePermission', 'C:\temp', 'read');

SQL> select util.RUN_CMD('C:\WINDOWS\system32\cmd.EXE /c CD C:\Users\pwatson\src\java ^& ECHO ^%CD^% ^& EXIT 4') as y from dual;
         Y
----------
         4

C:\app\oramgr\product\12.1.0\dbhome_1\DATABASE
SQL> select util.RUN_CMD('C:\WINDOWS\system32\cmd.EXE /c ECHO ^%CD^% >jjj.txt ^& EXIT 7') as y from dual;
         Y
----------
         7

SQL> select util.RUN_CMD('C:\WINDOWS\system32\cmd.EXE /c C:\Windows\System32\whoami.exe >jjj_whoami.txt') as y from dual;
         Y
----------
         0


C:\app\oramgr\product\12.1.0\dbhome_1\database>type JJJ.TXT
C:\app\oramgr\product\12.1.0\dbhome_1\DATABASE

C:\app\oramgr\product\12.1.0\dbhome_1\database>type JJJ_WHOAMI.TXT

Answer 1

Maybe Oracle is a nobody when it runs whoami on Windows? Good idea is to change the user who starts the service.

---

The third call is slightly different from the second. You didn't call for an exit.

Try the below:

select util.RUN_CMD('C:\WINDOWS\system32\cmd.EXE /c C:\Windows\System32\whoami.exe >jjj_whoami.txt ^& EXIT 8') as y from dual;