$ strace ./shutdown

execve("./shutdown", ["./shutdown"], [/* 16 vars */]) = 0
.
. *****text omitted*****
.
getuid32() = 8218
geteuid32() = 8218
setuid32(8218) = 0
getuid32() = 8218
write(2, "shutdown: you must be root to do"..., 39shutdown: you must be root to do that!
) = 39
exit_group(1) = ?
Process 6144 detached
*************************************************

$ ./shutdown
shutdown: you must be root to do that!


Wow. Thanks dude. Never knew such a command existed even.