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Re: Following symlinks in globstar (part 2)


From: Chet Ramey
Subject: Re: Following symlinks in globstar (part 2)
Date: Wed, 11 Apr 2018 10:57:20 -0400
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:52.0) Gecko/20100101 Thunderbird/52.7.0

On 4/11/18 10:32 AM, Greg Wooledge wrote:
> On Wed, Apr 11, 2018 at 10:21:03AM -0400, Chet Ramey wrote:
>> On 4/11/18 12:21 AM, Murukesh Mohanan wrote:
>>> This has come up in the past, and was somewhat resolved (<
>>> http://lists.gnu.org/archive/html/bug-bash/2014-03/msg00097.html>), but
>>> bash's behaviour is still a but surprising IMHO. While globstar doesn't
>>> descend further into symlinks, symlinked directories are selected as a
>>> candidate for matches to ** itself. But zsh doesn't do this:
>>
>> Before I look at this, note that this doesn't demonstrate anything: you
>> haven't enabled the `globstar' option, so `**' isn't treated specially.
>>
>>> $ bash -c '(d=$(mktemp -d); cd "$d"; mkdir a; ln -s a b; touch a/a.c c.c;
>>> echo **/*.c; cd ..; rm -r "$d")'
>>> a/a.c b/a.c
> 
> Here's a possibly more useful demonstration:
> 
> wooledg:~$ mkdir /tmp/x; cd /tmp/x
> wooledg:/tmp/x$ mkdir dir; ln -s dir link; touch dir/file
> wooledg:/tmp/x$ shopt -s globstar
> wooledg:/tmp/x$ echo **
> dir dir/file link
> wooledg:/tmp/x$ echo **/file
> dir/file link/file
> 
> I think the complaint is about the handling of "**/file" here.

Yep, that's an incompatibility. The `c.c' thing in the original report is
just a red herring, though.

Chet
-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU    address@hidden    http://tiswww.cwru.edu/~chet/



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