Subj : Re: dosemu
To   : tenser
From : Al
Date : Wed Feb 05 2020 04:51:10

 te> Short answer, I'm afraid I don't know why your batch file is
 te> displaying, but that redirection is almost certainly NOT what you
 te> want.

I'm not sure why either. If that didn't happen I wouldn't need to
redirect anything. I suppose it's not really a big deal I just prefer it
didn't do that.

 te> My suspicion is that, if you opened up the .bat file itself, you'd
 te> see it either directing itself to echo everything (I think that was
 te> a thing in DOS batch files?  I honestly don't remember, and haven't
 te> touched MSFT anything in many years.  I have some vague memory of
 te> `@echo on` or something like that at the top of the file.  A quick
 te> search tells me that prepending each command with '@' will disable
 te> echoing the command as the batch file executes and that if you add
 te> `@echo off` as the first line of the file it won't echo the
 te> commands it executes as it runs), or it's explicitly cat'ing itself
 te> out (e.g. it has a line like `type me.bat`).

Here's a look at the .bat file dosemu runs fire up The Magic Oracle..

@echo off
bnu /L0:38400
D:
CD \TMO
ORACLE.EXE /n%1 /dd:\tmo\node%1\dorinfo1.def
exitemu

I'm using dosemu with FreeDOS, so it might be different with another
version of DOS, I'm not sure.

 te> Fun historical fact: the existence of `stderr` owes itself to the
 te> invention of pipes in 3rd Edition Research Unix.  Before that,
 te> there was no need for a separate error stream!

In my day to day computing I rarely need to redirect anything so when I
do I always have to look it up. When I have a problem with ./configure or
make I need to redirect the output to a file so I can post it. Most times
I also need to grab both stdout and stderr so I'll have to do some
redirection and it always takes me a few tries to get the details out.


 Ttyl :-),
         Al

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