From: utzoo!decvax!harpo!npoiv!alice!rabbit!ark
Newsgroups: net.unix-wizards
Title: #!
Article-I.D.: rabbit.853
Posted: Sat Oct 30 10:10:03 1982
Received: Sun Oct 31 02:37:34 1982

The "#!" hack in the 4BSD kernel could not have been done in the Shell.
Consider, with this change it is possible to put #!/bin/sh in the
first line of a file, set the setuid bit, and have the effect of a
setuid shell script.  This could only be accomplished in the Shell
by making the Shell a super-user program -- surely a poor idea.