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Date:	Mon, 6 Mar 2000 10:58:36 PST
From:	<leganii@surfree.com >
Reply-To:	scoug-programming@scoug.com
To:	scoug-programming@scoug.com
Subject:	SCOUG-Programming: Re: korn shell

Content Type: text/plain

On Mon, 06 March 2000, Peter Skye wrote:

>
> dallasii@kincyb.com wrote:
> >
> > The thing in my mind that defines UNIX at the command line
> > prompt is that each stage in a pipe occurs as a process
> > that happens in parallel to the other stages of the pipe.
> >
> > As far as I know, this is not the case for all versions of
> > DOS, OS/2, and any products from M$.
>
> OS/2 parallels its command line "pipes" - I believe it's documented
> (don't remember where) and the command line filters I run seem to act
> accordingly.
>
> I just tested the following on a large partition and the output appears
> instantly, hence there's no "temporary" file on disk:
>
> cd \
> dir /s | find " "
>
> The above starts in the root directory and does a DIR list of every file
> on the drive. The FIND simply copies every line, since every line
> contains at least one space.

You're right. You can't trust that guy at
dallasii@kincyb.com. :-)

I've checked it on my NT ( :-( )
workstation, with the same results as you.
I'm trying to remember the circumstances that
convinced me that it was like DOS, something to do
with logging ppp.exe as I recall.
I based my rant on some experience I had though, it
wasn't pure pomposity that drove me on.

>
> DOS and DOS-based versions of Windows use a temporary file for a pipe.
> _____
>
> > Also the process control seems to be an area that OS/2
> > doesn't quite have all the fine points that UNIX has.
> > The little 'go' utility seems to provide rough
> > equivalants to 'kill', 'ps' and 'fg' (restart in
> > foreground), but what to replace the suspend character
> > '^Z' and 'bg' (restart in background) with I don't
> > know - maybe someone else has some suggestions?
>
> Clueless here. I don't know anything about go, kill, ps, fg, bg and the
> ^Z suspend character. Are these all Unix commands?

Yeah. 'kill' sends a signal, frequently the infamous
-9, unconditional kill the process.
'ps' lists current processes.
^Z suspends the current job at the console.
I don't use them too much, but 'bg' and 'fg'
restart or move a job into background or
foreground when suspended or in background.
From what little I know, the ^Z and 'bg'
pair are the ones I don't see any immediate
equivalence in OS/2 to.
I think did impliment a '&',
which sends something from the prompt imediately
into background. Example:

type * >> monster.file & # this would go into
background immediately, you come right back to the
prompt.

'go.exe' was a little OS/2 utility that can do
things like list processes, jump to them from the
command line, and kill jobs.
I think the consensus on comp.lang.rexx a while back
was that it was probably the easiest way to deal
with these things, should be available on Hobbes.
I should of suggested it the other month when
they were compiling the list of favorite tools.
I take it for granted, it probably should come
with OS/2.

>
> Good info, thanks.
> _____
>
>
> - Peter
>
>

Regards
Dallas E. Legan II / leganii@surfree.com / dallasii@kincyb.com

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