Date: Mon, 02 Nov 1998 23:57:59 +0000 From: Brian Somers <brian@Awfulhak.org> To: Dan Nelson <dnelson@emsphone.com> Cc: Brian Somers <brian@Awfulhak.org>, "John W. DeBoskey" <jwd@unx.sas.com>, Brian Feldman <green@zone.syracuse.net>, freebsd-current@FreeBSD.ORG Subject: Re: Changing sh for compatibility sake Message-ID: <199811022357.XAA03594@woof.lan.awfulhak.org> In-Reply-To: Your message of "Sun, 01 Nov 1998 21:05:12 CST." <19981101210512.A21213@emsphone.com>
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> In the last episode (Nov 01), Brian Somers said:
> > The *only* shell I've ever seen that does this is the original ksh.
> > I think it's a *great* feature, but it's also non-standard. With it,
> > you can also
> >
> > echo hello there | read a b
> >
> > and get $a and $b back. Certainly, any version of sh, ash, zsh, bash
> > and pdksh that I've seen execute everything in the pipe in a subshell.
>
> ? I thought standard procedure was to execute the last command in a
> pipe in the parent shell. Your command runs fine on zsh and bash (not
> ash though).
I haven't got an installed zsh handy, but:
dev:~ $ bash
dev:~ $ echo hello there | read a b
dev:~ $ echo $a $b
dev:~ $ echo $BASH_VERSION
2.01.0(1)-release
dev:~ $
>From the man page:
Each command in a pipeline is executed as a separate pro-
cess (i.e., in a subshell).
Zsh behaved the same with the latest release from about 3 months ago.
> -Dan
--
Brian <brian@Awfulhak.org>, <brian@FreeBSD.org>, <brian@OpenBSD.org>
<http://www.Awfulhak.org>;
Don't _EVER_ lose your sense of humour....
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