From mboxrd@z Thu Jan  1 00:00:00 1970
From: cowan@mercury.ccil.org (John Cowan)
Date: Sun, 16 Jan 2011 12:17:15 -0500
Subject: [TUHS] History of #! interpretation in Unix
In-Reply-To: <20110116132039.GA16484@lisa.in-ulm.de>
References: <20110116084330.GA27396@minnie.tuhs.org>
	<20110116095548.GC3374@mercury.ccil.org>
	<20110116132039.GA16484@lisa.in-ulm.de>
Message-ID: <20110116171715.GD3374@mercury.ccil.org>

Sven Mascheck scripsit:

> As you mention "shebangs began .. as csh-only hack":
> I still wonder if one may call the BSD csh-hack as origin,
> because #! might have been developed independently at Bell Labs.

No, that would be too much of a coincidence to choose exactly the
same characters.  There has to be a single point of origin, from
which it spread by stimulus diffusion (you hear there are telescopes,
you know they use lenses, you build your own telescope).

> I thought sh-like shells in general try to interprete scripts themselves
> upon an ENOEXEC.  Do you know certain shells which actually call "/bin/sh"?

Yes, seemingly bash does that too.  Bogus.

-- 
John Cowan    cowan at ccil.org    http://ccil.org/~cowan
The whole of Gaul is quartered into three halves.
        --Julius Caesar