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Date: Fri, 28 Jan 2005 16:33:28 +0100
From: Jilles Tjoelker <jilles@stack.nl>
To: Julian Elischer <julian@elischer.org>
Message-ID: <20050128153328.GA96969@stack.nl>
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	<20050128094116.B56848@beagle.kn.op.dlr.de> <41FA008D.7030403@elischer.org>
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cc: Current <freebsd-current@freebsd.org>
cc: Harti Brandt <harti@freebsd.org>
Subject: Re: sh bug?
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On Fri, Jan 28, 2005 at 01:06:21AM -0800, Julian Elischer wrote:
> Harti Brandt wrote:
> >On Fri, 28 Jan 2005, Julian Elischer wrote:
> >JE>however  echo $$
> >JE>and
> >JE>  ( echo $$ )
> >JE>produce the same result.
> >I think that the $$ is expanded in the old shell in any case.

Although it seems similar, I prefer to say the value of $$ does not
change when forking a subshell. man sh and POSIX also state that. Thus,
all $ expandos work the same way.

> hence my test of
> ps -l vs (ps -l)

> unfortunatly the shell short circuits that too if it's too simple.

But unfortunately, it doesn't short circuit when you something like sh
-c xterm, it keeps a useless shell waiting.

-- 
Jilles Tjoelker