SUID permission on Bash script

[Jeronimo Calvo]

Hi folks!

Im trying to set up a reaaallly basic scrip to allow one user to shutdown my
machine without root permisions, seting up SUID as follows:


-rwsrwxr-- 1 root wheel 38 Aug 27 23:12 apagar.sh

$ ./apagar.sh

Permission denied


content of script:


cat apagar.sh

]#!/usr/local/bin/bash
shutdown -p now

As far as i know, using SUID, script must runs with root permissions... so i
shoudnt get "Permission denied", what im doing wrong??