Executing os command from pl/sql

hi all , i've written the following code in order to call the unix OS command , the code compiles fine and runs too but when i pass any unix command as procedure parameter i encounter error
ERROR at line 1:
ORA-29532: Java call terminated by uncaught Java exception: java.io.IOException: can't exec: pwd does not exists
ORA-06512: at "SYS.EXEOS", line 0
ORA-06512: at line 1
kindly help me. i'll be very thankful to u
regards

3360,
Actually pwd is not an OS command, it is a shell commandJust for correction.
pwd is OS command and also some of shells (sh, ksh) could have their own pwd implemented which supercede existing binary pwd.
Linux:
$ which pwd
/bin/pwdSolaris:
$ which pwd
/usr/bin/pwd
Of course giving the privileges to run a shell from the database is a security hole big enough to drive a truck through. ThinkI totaly agree. Unfortunately there are people who are still thinking that database could be ideal mail server :-) or OS simulator :-).
Perhaps Oracle could be running under chroot-ed enviroment but this of course could be not useful in some cases.

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