From: utzoo!decvax!harpo!floyd!vax135!ariel!houti!lime!burdvax!puder
Newsgroups: net.unix-wizards
Title: "Re: . files and interactiveness"
Article-I.D.: burdvax.270
Posted: Thu Oct 28 11:13:20 1982
Received: Fri Oct 29 02:25:01 1982
References: microsof.2557

There is already a standard for identifying scripts.
#! /bin/csh
as the first line of a file indicates that ccsshh should be
given the file to interpret.
#! /bin/sh
analogously for sshh.
One argument can be specified after the interpreter name, as in
#! /bin/csh -f
to prevent reading of .cshrc.
I understand (though I have not tried it) that any "interpreter" can be
specified in this way.
I believe that this information is used by the eexxeecc system call.