cygcheck and literal plus sign

cygcheck and literal plus sign

[Steven Penny]

Searching for the popular compiler produces unexpected results

    $ cygcheck -p 'g++.exe'
    Found 0 matches for g  .exe

    $ cygcheck -p 'g\+\+.exe'
    Found 0 matches for g\ \ .exe

How can I include a literal '+' (plus character) in my search?

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Re: cygcheck and literal plus sign

[Christopher Faylor]

On Tue, Jan 21, 2014 at 05:59:16PM -0600, Steven Penny wrote:
>Searching for the popular compiler produces unexpected results
>
>    $ cygcheck -p 'g++.exe'
>    Found 0 matches for g  .exe
>
>    $ cygcheck -p 'g\+\+.exe'
>    Found 0 matches for g\ \ .exe
>
>How can I include a literal '+' (plus character) in my search?

By remembering that this is a regex search.  How do you quote special characters
in regexes?  Answer: With a '\'.

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Re: cygcheck and literal plus sign

[Marco Atzeri]

On 22/01/2014 06:58, Christopher Faylor wrote:
> On Tue, Jan 21, 2014 at 05:59:16PM -0600, Steven Penny wrote:
>> Searching for the popular compiler produces unexpected results
>>
>>     $ cygcheck -p 'g++.exe'
>>     Found 0 matches for g  .exe
>>
>>     $ cygcheck -p 'g\+\+.exe'
>>     Found 0 matches for g\ \ .exe
>>
>> How can I include a literal '+' (plus character) in my search?
>
> By remembering that this is a regex search.  How do you quote special characters
> in regexes?  Answer: With a '\'.
>

I am surely dumb, but whatever and how many '\' are used
the '+' is always returned as a ' ' in the reply.

So the specific example will be appreciated,
as a single quoting usually works in regexes

  $ cd /etc/setup
  $ zcat gcc-g++.lst.gz |grep -P "g\+\+"
usr/bin/g++.exe
usr/bin/i686-pc-cygwin-g++.exe
usr/share/man/man1/g++.1.gz

Is something "sanitizing" the query on server side to avoid
nasty surprise ?

  $ zcat gcc-g++.lst.gz |grep  -P "g++" |wc -l
723


Marco



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Re: cygcheck and literal plus sign

[Andrew Schulman]

> >    $ cygcheck -p 'g\+\+.exe'
> >    Found 0 matches for g\ \ .exe
> >
> >How can I include a literal '+' (plus character) in my search?
> 
> By remembering that this is a regex search.  How do you quote special characters
> in regexes?  Answer: With a '\'.

That's what he did.  The single quotes protected the \'s from
interpretation by the shell, so cygcheck received the regex: g\+\+.exe


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Re: cygcheck and literal plus sign

[Christopher Faylor]

On Wed, Jan 22, 2014 at 06:34:49AM -0500, Andrew Schulman wrote:
>> >    $ cygcheck -p 'g\+\+.exe'
>> >    Found 0 matches for g\ \ .exe
>> >
>> >How can I include a literal '+' (plus character) in my search?
>> 
>> By remembering that this is a regex search.  How do you quote special characters
>> in regexes?  Answer: With a '\'.
>
>That's what he did.  The single quotes protected the \'s from
>interpretation by the shell, so cygcheck received the regex: g\+\+.exe

Sorry.  I screwed up there by not reading carefully.

So I'll change my answer to "I don't know".

cgf

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Re: cygcheck and literal plus sign

[Andrew Schulman]

> On Wed, Jan 22, 2014 at 06:34:49AM -0500, Andrew Schulman wrote:
> >> >    $ cygcheck -p 'g\+\+.exe'
> >> >    Found 0 matches for g\ \ .exe
> >> >
> >> >How can I include a literal '+' (plus character) in my search?
> >> 
> >> By remembering that this is a regex search.  How do you quote special characters
> >> in regexes?  Answer: With a '\'.
> >
> >That's what he did.  The single quotes protected the \'s from
> >interpretation by the shell, so cygcheck received the regex: g\+\+.exe

(which should have been g\+\+\.exe)

> Sorry.  I screwed up there by not reading carefully.
> 
> So I'll change my answer to "I don't know".

A time-honored answer :)


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Re: cygcheck and literal plus sign

[David Boyce]

On Wed, Jan 22, 2014 at 7:07 AM, Christopher Faylor wrote:

> So I'll change my answer to "I don't know".

How about 'g[+][+]' or 'g[+]{2}'?

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Re: cygcheck and literal plus sign

[Larry Hall (Cygwin)]

On 1/22/2014 11:05 AM, David Boyce wrote:
> On Wed, Jan 22, 2014 at 7:07 AM, Christopher Faylor wrote:
>
>> So I'll change my answer to "I don't know".
>
> How about 'g[+][+]' or 'g[+]{2}'?

May I suggest that curious folks can more directly validate workarounds
by trying them directly.  cygwin.com generally has reasonable turnaround.

-- 
Larry

_____________________________________________________________________

A: Yes.
 > Q: Are you sure?
 >> A: Because it reverses the logical flow of conversation.
 >>> Q: Why is top posting annoying in email?

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Re: cygcheck and literal plus sign

[Steven Penny]

On Wed, Jan 22, 2014 at 10:05 AM, David Boyce wrote
> How about 'g[+][+]' or 'g[+]{2}'?

Please, no more lazy answers

    $ cygcheck -p 'g[+][+].exe'
    Found 0 matches for g[ ][ ].exe

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RE: cygcheck and literal plus sign

[Gates, Roger]

On Friday, January 24, 2014 9:26 PM Steven Penny wrote
>On Wed, Jan 22, 2014 at 10:05 AM, David Boyce wrote
>> How about 'g[+][+]' or 'g[+]{2}'?
>
>Please, no more lazy answers
>
>    $ cygcheck -p 'g[+][+].exe'
>    Found 0 matches for g[ ][ ].exe

$ ascii +
ASCII 2/11 is decimal 043, hex 2b, octal 053, bits 00101011: prints as `+'
Official name: Plus Sign
Other names: Add, Cross

$ cygcheck -p 'g\x{2b}\x{2b}.exe'
Found 11 matches for g\x{2b}\x{2b}.exe
x86/cygwin64-gcc-g++/cygwin64-gcc-g++-4.8.2-1
x86/cygwin64-gcc-g++/cygwin64-gcc-g++-4.8.2-2
x86/gcc-g++/gcc-g++-4.8.2-1
x86/gcc-g++/gcc-g++-4.8.2-2
x86/gcc4-g++/gcc4-g++-4.7.3-2
x86/mingw-gcc-g++/mingw-gcc-g++-4.5.2-1
x86/mingw-gcc-g++/mingw-gcc-g++-4.7.3-1
x86/mingw64-i686-gcc-g++/mingw64-i686-gcc-g++-4.8.2-1
x86/mingw64-i686-gcc-g++/mingw64-i686-gcc-g++-4.8.2-2
x86/mingw64-x86_64-gcc-g++/mingw64-x86_64-gcc-g++-4.8.2-1
x86/mingw64-x86_64-gcc-g++/mingw64-x86_64-gcc-g++-4.8.2-2
$

Roger L. Gates

______________________________________________________________________
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Re: cygcheck and literal plus sign

[Larry Hall (Cygwin)]

On 1/27/2014 10:47 AM, Gates, Roger wrote:
>
> $ ascii +
> ASCII 2/11 is decimal 043, hex 2b, octal 053, bits 00101011: prints as `+'
> Official name: Plus Sign
> Other names: Add, Cross
>
> $ cygcheck -p 'g\x{2b}\x{2b}.exe'
> Found 11 matches for g\x{2b}\x{2b}.exe

But of course, everyone knows that! ;-)

Thanks Roger for providing this useful bit of info.

-- 
Larry

_____________________________________________________________________

A: Yes.
 > Q: Are you sure?
 >> A: Because it reverses the logical flow of conversation.
 >>> Q: Why is top posting annoying in email?

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Re: cygcheck and literal plus sign

[Steven Penny]

On Mon, Jan 27, 2014 at 9:47 AM, Gates, Roger wrote
> $ ascii +

It should be noted that "ascii" is not included with a base install, and part of
the "ascii" package

> $ cygcheck -p 'g\x{2b}\x{2b}.exe'

it should be further noted that the braces are not necessary in this instance

    $ cygcheck -p 'g\x2b\x2b.exe'
    Found 9 matches for g\x2b\x2b.exe
    x86_64/cygwin32-gcc-g++/cygwin32-gcc-g++-4.8.2-1
    x86_64/cygwin32-gcc-g++/cygwin32-gcc-g++-4.8.2-2
    x86_64/gcc-g++/gcc-g++-4.8.1-3
    x86_64/gcc-g++/gcc-g++-4.8.2-1
    x86_64/mingw-gcc-g++/mingw-gcc-g++-4.7.3-1
    x86_64/mingw64-i686-gcc-g++/mingw64-i686-gcc-g++-4.8.1-2
    x86_64/mingw64-i686-gcc-g++/mingw64-i686-gcc-g++-4.8.2-1
    x86_64/mingw64-x86_64-gcc-g++/mingw64-x86_64-gcc-g++-4.8.1-2
    x86_64/mingw64-x86_64-gcc-g++/mingw64-x86_64-gcc-g++-4.8.2-1

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Re: cygcheck and literal plus sign

[Steven Penny]

On Mon, 27 Jan 2014 16:43:23, Steven Penny wrote:
>     $ cygcheck -p 'g\x2b\x2b.exe'

It looks like this is broken again. package-grep does work:

$ q=https://cygwin.com/cgi-bin2/package-grep.cgi
$ curl -s "$q"'?text=1&arch=x86_64&grep=mingw32-g%2B%2B' | awk 'NR>1{$0=$1}1'
Found 4 matches for mingw32-g++
mingw64-i686-gcc-g++-5.4.0-2
mingw64-i686-gcc-g++-5.4.0-3
mingw64-x86_64-gcc-g++-5.4.0-2
mingw64-x86_64-gcc-g++-5.4.0-3

but it seems no incantation will make cygcheck work:

    $ cygcheck -p mingw32-g%2B%2B
    Found 0 matches for mingw32-g%2B%2B

    $ cygcheck -p mingw32-g%2b%2b
    Found 0 matches for mingw32-g%2b%2b

    $ cygcheck -p mingw32-g++
    Found 0 matches for mingw32-g

    $ cygcheck -p 'mingw32-g\+\+'
    Found 0 matches for mingw32-g\ \

    $ cygcheck -p 'mingw32-g\x{2b}\x{2b}'
    Found 0 matches for mingw32-g\x{2b}\x{2b}

    $ cygcheck -p 'mingw32-g\x2b\x2b'
    Found 0 matches for mingw32-g\x2b\x2b

    $ cygcheck -p 'mingw32-g\53\53'
    Found 0 matches for mingw32-g\53\53

    $ cygcheck -p 'mingw32-g\053\053'
    Found 0 matches for mingw32-g\053\053


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Re: cygcheck and literal plus sign

[Doug Henderson]

On 27 January 2017 at 20:01, Steven Penny wrote:
> On Mon, 27 Jan 2014 16:43:23, Steven Penny wrote:
>>     $ cygcheck -p 'g\x2b\x2b.exe'
>
> It looks like this is broken again. package-grep does work:
>
> $ q=https://cygwin.com/cgi-bin2/package-grep.cgi
> $ curl -s "$q"'?text=1&arch=x86_64&grep=mingw32-g%2B%2B' | awk 'NR>1{$0=$1}1'
> Found 4 matches for mingw32-g++
> mingw64-i686-gcc-g++-5.4.0-2
> mingw64-i686-gcc-g++-5.4.0-3
> mingw64-x86_64-gcc-g++-5.4.0-2
> mingw64-x86_64-gcc-g++-5.4.0-3
>
> but it seems no incantation will make cygcheck work:

Try this:
$ cygcheck -p "mingw32-g[*-,][*-,]"
Found 4 matches for mingw32-g[*-,][*-,]
mingw64-i686-gcc-g++-5.4.0-2 - mingw64-i686-gcc-g++: GCC for Win32
(i686-w64-mingw32) toolchain (C++) (installed binaries and support
files)
mingw64-i686-gcc-g++-5.4.0-3 - mingw64-i686-gcc-g++: GCC for Win32
(i686-w64-mingw32) toolchain (C++) (installed binaries and support
files)
mingw64-x86_64-gcc-g++-5.4.0-2 - mingw64-x86_64-gcc-g++: GCC for Win64
toolchain (C++) (installed binaries and support files)
mingw64-x86_64-gcc-g++-5.4.0-3 - mingw64-x86_64-gcc-g++: GCC for Win64
toolchain (C++) (installed binaries and support files)

HTH
Doug

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Re: cygcheck and literal plus sign

[Steven Penny]

On Fri, 27 Jan 2017 21:01:14, Doug Henderson wrote:
> Try this:
> $ cygcheck -p "mingw32-g[*-,][*-,]"
> Found 4 matches for mingw32-g[*-,][*-,]

Thanks for this. Using ranges is gross, because it relies on your locale, but
it did put me on the right track:

    $ cygcheck -p 'mingw32-g[:punct:][:punct:]' | awk 'NR>1{$0=$1}1'
    Found 8 matches for mingw32-g[:punct:][:punct:]
    mingw64-i686-gcc-core-5.4.0-2
    mingw64-i686-gcc-core-5.4.0-3
    mingw64-i686-gcc-debuginfo-5.4.0-2
    mingw64-i686-gcc-debuginfo-5.4.0-3
    mingw64-x86_64-gcc-core-5.4.0-2
    mingw64-x86_64-gcc-core-5.4.0-3
    mingw64-x86_64-gcc-debuginfo-5.4.0-2
    mingw64-x86_64-gcc-debuginfo-5.4.0-3


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Re: cygcheck and literal plus sign

[Brian Inglis]

On 2017-01-28 05:21, Steven Penny wrote:
> On Fri, 27 Jan 2017 21:01:14, Doug Henderson wrote:
>> Try this:
>> $ cygcheck -p "mingw32-g[*-,][*-,]"
>> Found 4 matches for mingw32-g[*-,][*-,]
> Thanks for this. Using ranges is gross, because it relies on your locale, but
> it did put me on the right track:
>     $ cygcheck -p 'mingw32-g[:punct:][:punct:]' | awk 'NR>1{$0=$1}1'
>     Found 8 matches for mingw32-g[:punct:][:punct:]
>     mingw64-i686-gcc-core-5.4.0-2
>     mingw64-i686-gcc-core-5.4.0-3
>     mingw64-i686-gcc-debuginfo-5.4.0-2
>     mingw64-i686-gcc-debuginfo-5.4.0-3
>     mingw64-x86_64-gcc-core-5.4.0-2
>     mingw64-x86_64-gcc-core-5.4.0-3
>     mingw64-x86_64-gcc-debuginfo-5.4.0-2
>     mingw64-x86_64-gcc-debuginfo-5.4.0-3

Your command is the same as:

$ cygcheck -p mingw32-g[:ctnpu][:ctnpu] | sed '2,$s/\s.*//'
Found 8 matches for mingw32-g[:ctnpu][:ctnpu]
mingw64-i686-gcc-core-5.4.0-2
mingw64-i686-gcc-core-5.4.0-3
mingw64-i686-gcc-debuginfo-5.4.0-2
mingw64-i686-gcc-debuginfo-5.4.0-3
mingw64-x86_64-gcc-core-5.4.0-2
mingw64-x86_64-gcc-core-5.4.0-3
mingw64-x86_64-gcc-debuginfo-5.4.0-2
mingw64-x86_64-gcc-debuginfo-5.4.0-3

ITYM:

$ cygcheck -p mingw32-g[[:punct:]][[:punct:]] | sed '2,$s/\s.*//'
Found 4 matches for mingw32-g[[:punct:]][[:punct:]]
mingw64-i686-gcc-g++-5.4.0-2
mingw64-i686-gcc-g++-5.4.0-3
mingw64-x86_64-gcc-g++-5.4.0-2
mingw64-x86_64-gcc-g++-5.4.0-3

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Re: cygcheck and literal plus sign

[Eric Blake]

[-- Attachment #1.1: Type: text/plain, Size: 750 bytes --]

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.

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

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.*//'

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org


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Re: cygcheck and literal plus sign

[Brian Inglis]

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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Re: cygcheck and literal plus sign

[Jon Turney]

On 28/01/2017 03:01, Steven Penny wrote:
> On Mon, 27 Jan 2014 16:43:23, Steven Penny wrote:
>>     $ cygcheck -p 'g\x2b\x2b.exe'

I think this relies on this being interpreted as a PCRE regex, which 
hasn't been the case for a while, since some server-side changes.

> It looks like this is broken again. package-grep does work:

Thanks for pointing this out.

> $ q=https://cygwin.com/cgi-bin2/package-grep.cgi
> $ curl -s "$q"'?text=1&arch=x86_64&grep=mingw32-g%2B%2B' | awk 'NR>1{$0=$1}1'
> Found 4 matches for mingw32-g++
> mingw64-i686-gcc-g++-5.4.0-2
> mingw64-i686-gcc-g++-5.4.0-3
> mingw64-x86_64-gcc-g++-5.4.0-2
> mingw64-x86_64-gcc-g++-5.4.0-3
>
> but it seems no incantation will make cygcheck work:
[...]
>
>     $ cygcheck -p mingw32-g++
>     Found 0 matches for mingw32-g

It looks like the underlying bug here is that 'cygcheck -p' doesn't 
encode '+', but the package-grep-cgi script is expecting the query part 
of the URL to be application/x-www-form-urlencoded (as is the case with 
the web form interface to this search), where '+' is the encoding for a 
' '...

I added a workaround to the script so that corresponding decoding ('+' 
-> ' ') is skipped if it looks like a cygcheck request ('text=1'), so 
this should be working again

> $ cygcheck -p mingw32-g++
> Found 4 matches for mingw32-g++
> mingw64-i686-gcc-g++-5.4.0-2 - mingw64-i686-gcc-g++: GCC for Win32 (i686-w64-mingw32) toolchain (C++) (installed binaries and support files)
> mingw64-i686-gcc-g++-5.4.0-3 - mingw64-i686-gcc-g++: GCC for Win32 (i686-w64-mingw32) toolchain (C++) (installed binaries and support files)
> mingw64-x86_64-gcc-g++-5.4.0-2 - mingw64-x86_64-gcc-g++: GCC for Win64 toolchain (C++) (installed binaries and support files)
> mingw64-x86_64-gcc-g++-5.4.0-3 - mingw64-x86_64-gcc-g++: GCC for Win64 toolchain (C++) (installed binaries and support files)


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Re: cygcheck and literal plus sign

[Steven Penny]

On Mon, 30 Jan 2017 18:30:19, Jon Turney wrote:
> I added a workaround to the script so that corresponding decoding ('+' 
> -> ' ') is skipped if it looks like a cygcheck request ('text=1'), so 
> this should be working again

Confirmed fixed, thanks.


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