running unix 'su 'cmd from java

[SonalPSPL Bagmar]

Hi all,
i want to run various unix cmds like su, cd ,and also shell scripts thru java prg..
but using Runtime.getRuntime().exec("su - imail") , i am not able to attain control over the imail user id over the session. is it that the process runs and terminates? i want to actually switch to user imail thru java code.
any help ? also when i do
Runtime.getRuntime().exec("cd bin") , i want to be physically located at that position.

any alternative ?


Regards
SONAL

[Ernest Friedman-Hill]

This is essentially a repost of this. I'm going to close this thread, and then go over and reply in the other one, where a discussion is already in progress.