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From: mykes@3comvax.UUCP (Mike Schwartz)
Newsgroups: net.micro.amiga
Subject: Re: Re: More unwanted opinions on Amiga DOS
Message-ID: <423@3comvax.UUCP>
Date: Mon, 24-Feb-86 12:47:31 EST
Article-I.D.: 3comvax.423
Posted: Mon Feb 24 12:47:31 1986
Date-Received: Sat, 1-Mar-86 17:21:41 EST
References: <1041@caip.RUTGERS.EDU> <373@3comvax.UUCP> <1628@jhunix.UUCP> <625@baylor.UUCP>
Reply-To: mykes@3comvax.UUCP (Mike Schwartz)
Distribution: net
Organization: 3Com Corp; Mountain View, CA
Lines: 23

If you want "pipes" (like those in Unix or MS DOS), AmigaDos provides
a real simple way to implement them - without designing custom devices, etc.
The statement:

CAT file | MORE

can be done on the Amiga using two commands:

CAT >PIPE-TEMPORARY-FILE file
MORE <PIPE-TEMPORARY-FILE

This is not as friendly as the original way, but there is an easy solution.
Write a small wedge between the CLI and the user.  This wedge can use
gets() to input strings (therefore it will look transparent to the user),
then can use the Exec() function of AmigaDos to turn the first type of
command into the second.  When command lines without pipes are entered,
the "wedge" program simply uses Exec() to execute the command line as typed.


My understanding is that TRIPOS supports more than one CLI and that at Amiga,
they chose to use the one that required the least amount of memory (a real
good choice in my opinion).  With a little bit of programming, a custom
CLI can also be done.