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Reply-To: Brian DOT Inglis AT Shaw DOT ca
Subject: Re: cygcheck and literal plus sign
References: <CAJ1FpuMrKniJ7mPi0dqmZERo876q0ow2MExepC_J-D7aGnsVaA AT mail DOT gmail DOT com> <588c8cc9 DOT a5249d0a DOT d8d5b DOT 49c2 AT mx DOT google DOT com> <a8ddccfc-6eed-0d05-b756-f95d7e5ccdf2 AT SystematicSw DOT ab DOT ca> <8ce40df2-0a8f-4128-9107-ea2f16ec7fca AT redhat DOT com>
To: cygwin AT cygwin DOT com
From: Brian Inglis <Brian DOT Inglis AT Shaw DOT ca>
Message-ID: <492085c7-09c5-0c5b-8b6b-02f38a8df9a5@Shaw.ca>
Date: Sat, 28 Jan 2017 12:59:12 -0700
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On 2017-01-28 12:06, Eric Blake wrote:
> On 01/28/2017 11:45 AM, Brian Inglis wrote:
>>> it did put me on the right track:
>>>     $ cygcheck -p 'mingw32-g[:punct:][:punct:]' | awk 'NR>1{$0=$1}1'
>> Your command is the same as:
>> $ cygcheck -p mingw32-g[:ctnpu][:ctnpu] | sed '2,$s/\s.*//'
> Not necessarily. You forgot quotes, so depending on what is in your 
> current directory, that glob might expand.

The point was that in any case it was not doing what was wanted nor 
expected, and an extra set of brackets [[:punct:]] are needed to 
search for punctuation.

>> ITYM:
>> $ cygcheck -p mingw32-g[[:punct:]][[:punct:]] | sed '2,$s/\s.*//'

Not sure what if anything glob does with double brackets - anything 
I tried with ls always returned the search string e.g. 

$ ls /etc/setup/[[a-z]]*
ls: cannot access '/etc/setup/[[a-z]]*': No such file or directory

It does not seem to have any support for accented character classes 
or the ilk e.g. re [[:a:][:e:][:i:][:o:][:u:]] which could be useful 
searching for UTF-8 filenames.

> Or, with proper quoting to shield yourself from globbing based on the
> contents of the current directory:
> cygcheck -p 'mingw32-g[[:punct:]][[:punct:]]' | sed '2,$s/\s.*//'

Always a concern for conscientious scripters and especially on Windows 
where characters which may rarely be encountered on Unix systems are 
often lurking to catch unwary scripters.

-- 
Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada

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