Date: Mon, 6 Mar 2000 14:09:16 +0600 (NS) From: Max Khon <fjoe@iclub.nsu.ru> To: Martin Cracauer <cracauer@cons.org> Cc: John Polstra <jdp@polstra.com>, Doug@gorean.org, hackers@FreeBSD.ORG Subject: Re: empty lists in for (/bin/sh) Message-ID: <Pine.BSF.4.21.0003061402350.95710-100000@iclub.nsu.ru> In-Reply-To: <20000306084031.A35426@cons.org>
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hi, there!
On Mon, 6 Mar 2000, Martin Cracauer wrote:
> I just checked POSIX 1003.2.
>
> for name [ in word ]
> do
> compound-list
> done
>
> "First, the list of words following 'in' shall be expanded to generate
> a list of items." [...] "If no items result from the expansion, the
> compound-list shall not be executed."
>
> <nothing> is not a word at all, so it can't be expanded, so I think
> bash is corrent to complain about a syntax error.
>
> It is clear, though, that your (John) example "variable expansion to
> nothing" is not an error and both shells do it right.
A lot of stuff in /usr/ports/Mk/bsd.port.mk depends on current /bin/sh
behaviour ("do nothing" instead of "complain and bail out").
I am the original poster and faced this problem when tried to port FreeBSD
Ports subsystem to Solaris and Linux.
/fjoe
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