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Re: coreutils-5.1.3 released: bug-fix-only, candidate for stable 5.2.0
From: |
Daniel Jacobowitz |
Subject: |
Re: coreutils-5.1.3 released: bug-fix-only, candidate for stable 5.2.0 |
Date: |
Thu, 12 Feb 2004 00:05:53 -0500 |
User-agent: |
Mutt/1.5.1i |
On Wed, Feb 11, 2004 at 12:33:52PM -0800, Paul Eggert wrote:
> Jim Meyering <address@hidden> writes:
>
> > I've never heard of a shell performing the // -> / substitution
> > indiscriminately.
>
> Me neither.
>
> Autoconf is littered with code like this:
>
> ac_script='s/\$U\././;s/\.o$//;s/\.obj$//'
> ac_i=`echo "$ac_i" | sed "$ac_script"`
By the way, something I noticed a few months ago when fixing quoting
bugs in GCC: this style of code triggers all sorts of problems with dash
(formerly called ash) at least as of 0.4.21 and a few earlier versions.
For example:
$ a='a\b'
$ set | grep '^a='
a='a\b'
$ echo "$a"
a
$
i.e. the \b is processed. This interacts very badly with
--program-transform-name='s/g\(.*\)/g\1-3.4/', because autoconf eats
the backslashes. POSIX appears to allow this behavior. Using here
documents works:
$ cat <<EOF
> $a
> EOF
a\b
$
I don't know if ash is considered an unsuitable shell. I know Debian
used to allow it to be used as /bin/sh and no longer does.
--
Daniel Jacobowitz
MontaVista Software Debian GNU/Linux Developer
- Re: coreutils-5.1.3 released: bug-fix-only, candidate for stable 5.2.0, Jim Meyering, 2004/02/11
- Shell-parsing test program (was Re: coreutils-5.1.3 released: bug-fix-only, candidate for stable 5.2.0), Eric Siegerman, 2004/02/11
- Re: coreutils-5.1.3 released: bug-fix-only, candidate for stable 5.2.0, Paul Eggert, 2004/02/11
- Re: coreutils-5.1.3 released: bug-fix-only, candidate for stable5.2.0, Bruce Korb, 2004/02/11
- Re: coreutils-5.1.3 released: bug-fix-only, candidate for stable 5.2.0, Lars Hecking, 2004/02/11
- Re: coreutils-5.1.3 released: bug-fix-only, candidate for stable 5.2.0,
Daniel Jacobowitz <=
- Re: coreutils-5.1.3 released: bug-fix-only, candidate for stable 5.2.0, Paul Eggert, 2004/02/12
- Re: coreutils-5.1.3 released: bug-fix-only, candidate for stable 5.2.0, Daniel Jacobowitz, 2004/02/12
- Re: coreutils-5.1.3 released: bug-fix-only, candidate for stable 5.2.0, Paul Eggert, 2004/02/12
- Re: coreutils-5.1.3 released: bug-fix-only, candidate for stable 5.2.0, Daniel Jacobowitz, 2004/02/16
- Re: coreutils-5.1.3 released: bug-fix-only, candidate for stable 5.2.0, Paul Eggert, 2004/02/17
- Re: coreutils-5.1.3 released: bug-fix-only, candidate for stable 5.2.0, Jeff Sheinberg, 2004/02/14
Re: coreutils-5.1.3 released: bug-fix-only, candidate for stable 5.2.0, Thomas Dickey, 2004/02/11