From mboxrd@z Thu Jan  1 00:00:00 1970
From: schily@schily.net (Joerg Schilling)
Date: Mon, 12 Sep 2016 14:50:10 +0200
Subject: [TUHS] Shell control through external commands
In-Reply-To: <alpine.DEB.2.11.1609121337110.28546@grey.csi.cam.ac.uk>
References: <201607151647.u6FGlqvW037575@tahoe.cs.Dartmouth.EDU>
 <20160910174011.GF5970@dnied%tiscali.it>
 <201609101922.u8AJMmtq024477@freefriends.org>
 <1bjMiH-10N-00@marmaro.de>
 <57d6748e.CNiWgn0QxOuugldp%schily@schily.net>
 <alpine.DEB.2.11.1609121337110.28546@grey.csi.cam.ac.uk>
Message-ID: <57d6a482.xj2/kMA3y0vR9uVo%schily@schily.net>

Tony Finch <dot at dotat.at> wrote:

> Joerg Schilling <schily at schily.net> wrote:
> >
> > The colon was introduced by AT&T around 1983.
>
> It's a builtin in the v7 Bourne shell - see SYSNULL in msg.c (which
> has the command name table) and in xec.c (which has the implementation)

You are missinterpeting things.

The colon in line one as a hint to a modified csh to call the Bourne Shell  
first appeared around 1983.


Jörg

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