[ruby-core:30380] execve still not possible?

Hi, 

I just tried to call an execve system call from ruby (need to exec one
of these silly cups printer programs that expect ARGV0 to be different
from their path), but when doing something like 

syscall 11 , '/bin/true' , ["true",0].pack('pi') , ['X=1', 0].pack('pi')


I get 


ArgumentError: string contains null byte
	       from (irb):1:in `syscall'
	       from (irb):1
	       from :0


which seems to be a rather old problem, has already been discussed
2008 under http://www.ruby-forum.com/topic/160121



However, the problem still exist with 1.8 and 1.9



Is there any way to call execve from ruby (i.e. execute a program with
a first parameter different from its path)?


regards
Hadmut