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Re: wildcard authz docs question

From: Doug Robinson <doug.robinson_at_wandisco.com>
Date: Tue, 21 Mar 2017 11:40:50 -0400


The shell's all treat ** as * and require that it match something. So
"mkdir -p foo/bar/baz" would match.

I would expect "/*/**/*", "/**/*/*" and "/*/*/**" to all match exactly the
same sets of components.

No command shell that I know of (sh,bash,zsh,tcsh,csh,ksh) has a
moral equivalent to "zero or more path components". Perl, python,
et. al. do.



On Wed, Mar 15, 2017 at 5:55 AM, Daniel Shahaf <d.s_at_daniel.shahaf.name>

> From the 1.10 draft release notes:
> > All wildcards apply to full path segments only, i.e. * never matches
> > /, except for the case where /**/ matches zero or more path segments.
> > For example, /*/**/* will match any path which contains at least
> > 2 segments and is equivalent to /**/*/* as well as /*/*/**.
> Are «/*/**/*» «/**/*/*» «/*/*/**» really equivalent? I would have
> expected the first two to match any node except / and /'s immediate
> children, but I wouldn't expect the third form to match /trunk/iota
> where iota is a file, since the pattern has a trailing slash after the
> non-optional second component.
> Testing this in
> cd $(mktemp -d)
> mkdir -p foo/bar
> , I see that neither vim nor zsh finds any matches for */*/**, meaning
> they don't interpret ** as "zero or more" path components in this
> pattern. I suppose they only treat ** in this way when it appears with
> slashes immediately before and after it.
> Cheers,
> Daniel

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Received on 2017-03-21 16:41:06 CET

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