From: reed@reedmedia.net (Jeremy C. Reed)
Subject: [TUHS] History of #! interpretation in Unix
Date: Mon, 17 Jan 2011 16:41:39 -0600 (CST) [thread overview]
Message-ID: <alpine.NEB.2.01.1101171616540.22444@t1.m.reedmedia.net> (raw)
In-Reply-To: <20110117205128.GI2461@mercury.ccil.org>
On Mon, 17 Jan 2011, John Cowan wrote:
> > This seems to indicate the idea was not developed separately at
> > Berkeley.
>
> Thanks for doing the digging. What this shows is that dmr came up with
> the idea of putting shebang processing into the kernel, but it does not
> show where shebangs as a shell feature came from. I still think that
> has to be the CSRG.
As a similar feature, Joy's experimental "ashell" in the first BSD had a
feature to run Pascal objects (started with the magic 0404 octal word)
with the px interpreter. In 2BSD (and then 3BSD), his new csh had the
OTHERSH feature -- if it started with # it would use csh; if the script
did not begin with the # it would use /bin/sh.
I still don't see the same #! feature, but the above appear they may be
inspiration. Also the 1BSD and 2BSD predate CSRG.
> > It was introduced into BSD by April 1981. For 2BSD (2.8) it was added by
> > Dec. 16, 1981 when built with MENLO_SCRIPT defined (but I don't see that
> > documented or defined).
>
> Thanks again for clarifying the ordering here: I had assumed that 2.8
> was older than 4.0.
next prev parent reply other threads:[~2011-01-17 22:41 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-16 8:43 Warren Toomey
2011-01-16 9:55 ` John Cowan
2011-01-16 13:20 ` Sven Mascheck
2011-01-16 17:17 ` John Cowan
2011-01-16 19:19 ` Sven Mascheck
2011-01-16 20:17 ` John Cowan
2011-01-16 20:42 ` Larry McVoy
2011-01-16 21:08 ` Sven Mascheck
2011-01-16 21:37 ` John Cowan
2011-01-17 16:35 ` Warner Losh
2011-01-17 20:47 ` John Cowan
2011-01-17 10:09 ` Tim Bradshaw
2011-01-16 10:53 ` Wilko Bulte
2011-01-17 16:25 ` Warner Losh
2011-01-17 19:02 ` Jeremy C. Reed
2011-01-17 20:51 ` John Cowan
2011-01-17 22:41 ` Jeremy C. Reed [this message]
2011-01-17 20:58 ` Sven Mascheck
2011-01-19 4:10 ` Cyrille Lefevre
2011-01-19 20:35 ` Sven Mascheck
2011-01-20 4:09 ` Cyrille Lefevre
2011-01-28 19:38 ` Jeremy C. Reed
2011-01-30 15:05 ` Sven Mascheck
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