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Re: [SOLVED] Libtool/zsh quoting problem: a zsh... bug?
- X-seq: zsh-workers 22245
- From: Peter Stephenson <p.w.stephenson@xxxxxxxxxxxx>
- To: zsh-workers@xxxxxxxxxx (Zsh hackers list)
- Subject: Re: [SOLVED] Libtool/zsh quoting problem: a zsh... bug?
- Date: Sun, 12 Feb 2006 20:26:17 +0000
- In-reply-to: Your message of "Sat, 11 Feb 2006 10:14:40 PST." <20060211181440.GA30984@xxxxxxxxxxxxx>
- Mailing-list: contact zsh-workers-help@xxxxxxxxxx; run by ezmlm
Wayne Davison wrote:
> I just took a look at that code using Peter's old patch as a start, and
> the assertion that the quotes have been stripped out is not quite true:
> there are still Dnull and Snull characters remaining which indicate that
> there used to be a double- or single-quotes present. This allows us to
> check the string. An overly simple version is this:
>
> --- subst.c 6 Feb 2006 11:57:06 -0000 1.44
> +++ subst.c 11 Feb 2006 18:07:23 -0000
> @@ -2012,6 +2012,8 @@ paramsubst(LinkList l, LinkNode n, char
> */
> multsub(&val, (aspar ? NULL : &aval), &isarr, NULL);
> copied = 1;
> + if (spbreak && (*s == Dnull || *s == Snull))
> + spbreak = 0;
> }
> break;
> case ':':
>
> This will turn off word-splitting if the string started with a single or
> a double quote. This is incomplete because the arg may be something
> more complicated (such as: 'one' 'two' 'three four'), but it seems
> better than what we have now.
Frankly, it's such a mess at the moment that I think any practical
improvement is a good thing. However, I think a comment would be a good
idea. (I've already covered paramsubst() with ranty comments about the
mess but never worked out what to do about it.)
> One question I have is what to do about ${=1:"$@"}? In the patch above,
> I chose to let the double quotes override the '='. If that is not
> desired, change the new "if" to only trigger disallow an spbreak of 2:
>
> + if (spbreak == 1 && (*s == Dnull || *s == Snull))
As pointed out elsewhere, the ${1+"$@"} is to work around limitations of
old Bourne shells and this sort of thing isn't that natural in native
zsh, which is the only place we have to worry about the = syntax. I
would probably expect the splitting to take place, but I'm not that
fussed.
--
Peter Stephenson <p.w.stephenson@xxxxxxxxxxxx>
Web page still at http://www.pwstephenson.fsnet.co.uk/
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