help with sudo

Hi NMLUG...

For a complicated reason, I need to run a script that sets euid to
several different values.  I have sudo ALL privileges, but I won't get
root on the machine in question.

Under sudo, I can set euid once, but I haven't figured out a way to
set euid more than once.  Here's a toy Ruby script that shows the
problem:

#################
euids = [2205, 2206, 2207]

euids.each do |id|

    Process.euid = id
    puts "euid is: "
    puts Process.euid

end
####################

Here's the output of this script running as me, and under sudo:

cmcmahon@machine:~$ ruby sudodemo.rb
sudodemo.rb:7:in `euid=': Operation not permitted (Errno::EPERM)
        from sudodemo.rb:7
        from sudodemo.rb:5:in `each'
        from sudodemo.rb:5
cmcmahon@machine:~$ sudo ruby sudodemo.rb
euid is:
2205
sudodemo.rb:7:in `euid=': Operation not permitted (Errno::EPERM)
        from sudodemo.rb:7
        from sudodemo.rb:5:in `each'
        from sudodemo.rb:5
cmcmahon@machine:~$


I also have access to the user whose euid is 2205, and that user also
has sudo ALL privileges.  I've tried doing "sudo -v" as the 2205 user
and then running the script as me, but I get the same result.

It may not be possible to do what I want to do, but any suggestions
would be appreciated.
Thanks,
-Chris
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