On Thu, Apr 15, 2004 at 09:40:05PM +1000, Herbert Xu wrote:
> On Wed, Apr 14, 2004 at 01:59:01PM +0200, Frank K?ster wrote:
> > This is how dash calls it in _some_ subdirectories:
> >
> > configuring in tetex
> > running /bin/sh ./configure --prefix=/usr --enable-ipc --without-dialog\
> > --without-texinfo --with-system-ncurses --with-x --with-system-zlib \
> > --with-system-pnglib --with-system-tifflib --with-system-wwwlib \
> > --with-system-t1lib --disable-multiplatform --enable-shared \
> > --mandir=/usr/share/man --infodir=${prefix}/share/info \
> > --cache-file=.././config.cache --srcdir=.
> > loading cache .././config.cache
> >
> > That is, dash replaced the first occurence of ${prefix} by the variable
> > expansion. This shouldn't happen, because it is enclosed in single
> > quotes.
>
> This is caused by dash's use of fnmatch(3) which appears to break
> on patterns containing [\]...].
>
> Here is a sample program to demonstrate it.
>
> #include <stdio.h>
> #include <fnmatch.h>
>
> int main(int argc, char **argv)
> {
> printf("%d\n", fnmatch("[\\]a]", "a", 0));
> return 0;
> }
fnmatch(3) references glob(7), which says:
Character classes
An expression `[...]' where the first character after the lead-
ing `[' is not an `!' matches a single character, namely any of
the characters enclosed by the brackets. The string enclosed
by the brackets cannot be empty; therefore `]' can be allowed
between the brackets, provided that it is the first character.
(Thus, `[][!]' matches the three characters `[', `]' and `!'.)
...
One can remove the special meaning of `?', `*' and `[' by pre-
ceding them by a backslash, or, in case this is part of a shell
command line, enclosing them in quotes. Between brackets these
characters stand for themselves. Thus, `[[?*\]' matches the
four characters `[', `?', `*' and `\'.
Accordingly, I believe that the pattern in your example means
"backslash, followed by a, followed by closing square bracket", not what
you think it means.
--
Colin Watson [EMAIL PROTECTED]
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