magic numbers

[Tony Luck]

One really useful effect of having the kernel look for '#!' is that shell
scripts are then really just like other executables (there should be no
way to tell by running it whether a program is a shell file or a binary)
i.e. you can make them setuid if you need to, or use them as login shells
without having to fix login/newgrp/su to know about ENOEXEC.

Tony Luck      { ... UK !ukc!edcaad!edee!aegl }