[TUHS] Shell control through external commands

Tony Finch dot at dotat.at
Mon Sep 12 22:41:10 AEST 2016

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)


f.anthony.n.finch  <dot at dotat.at>  http://dotat.at/  -  I xn--zr8h punycode
Southeast Fitzroy: Southerly becoming cyclonic, 5 to 7, occasionally 4 later.
Moderate or rough, occasionally very rough at first. Rain or showers. Good,
occasionally poor.

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