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Re: commands between { }


From: Paul Jarc
Subject: Re: commands between { }
Date: Fri, 03 May 2002 12:13:30 -0400
User-agent: Gnus/5.090006 (Oort Gnus v0.06) Emacs/21.2 (i686-pc-linux-gnu)

Jirka Kosina <address@hidden> wrote:
> P=0 ; { P=1; echo $P; }    | { cat -; echo $P; }
>
> I get
> 1
> 0
>
> Though I would accept

You mean "expect", not "accept".

> 1
> 1
>
> as commands between { } are executed in the same shell, which made P=0.

They are *not* run in the same process.  Each command in a pipeline is
run in its own process.  See FAQ entry E4.


paul



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