Ironruby core - Apr 2009 - FW: File.executable? always returns false on Windows machine

Anyone know what File.executable? is supposed to do? For me, it always returns
false. For Jim, Tomas and others, it always returns true no matter what the file
extension is. Any idea why we might be getting different results?

FWIW, the current IronRuby implementation returns true if the file extension is
".exe".

Thanks,
Shri

From: Shri Borde
Sent: Thursday, April 02, 2009 3:59 PM
To: ruby-core at ruby-lang.org
Subject: File.executable? always returns false on Windows machine

On my machine, File.executable? is always returning false. I have tried 1.8p27.
I am running on a Windows Vista x86 machine. The file system is NTFS. I
can''t think of anything unusual about my machine.

What are the semantic supposed to be? Most of the people I have asked get a
value of true for all of the statements below, even for the File.executable? on
the ttf file.

puts File.exists?("C:/windows/fonts/wingding.ttf")
puts File.readable?("C:/windows/fonts/wingding.ttf")
puts File.executable?("C:/windows/fonts/wingding.ttf") # Prints false
only for me

puts File.exists?("C:/windows/notepad.exe")
puts File.readable?("C:/windows/notepad.exe")
puts File.executable?("C:/windows/notepad.exe") # Prints false only
for me

With the 1.9 binaries, File.executable? returns true only if the file extensions
is something like .exe. Again, it always returns true for the people I have
asked.

Thanks,
Shri

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On *nix systems it would return true if the executable bit is set and false
if it''s not.  Windows doesn''t really have a comparable
attribute since files
are "categorized" based on extension, hence .exe acting as a sort of
"executable bit".

On Fri, Apr 3, 2009 at 1:36 PM, Shri Borde <Shri.Borde at microsoft.com>
wrote:
>  Anyone know what File.executable? is supposed to do? For me, it always
> returns false. For Jim, Tomas and others, it always returns true no matter
> what the file extension is. Any idea why we might be getting different
> results?
>
>
>
> FWIW, the current IronRuby implementation returns true if the file
> extension is ?.exe?.
>
>
>
> Thanks,
>
> Shri
>
>
>
> *From:* Shri Borde
> *Sent:* Thursday, April 02, 2009 3:59 PM
> *To:* ruby-core at ruby-lang.org
> *Subject:* File.executable? always returns false on Windows machine
>
>
>
> On my machine, File.executable? is always returning false. I have tried
> 1.8p27. I am running on a Windows Vista x86 machine. The file system is
> NTFS. I can?t think of anything unusual about my machine.
>
>
>
> What are the semantic supposed to be? Most of the people I have asked get a
> value of true for all of the statements below, even for the
File.executable?
> on the ttf file.
>
>
>
> puts File.exists?("C:/windows/fonts/wingding.ttf")
>
> puts File.readable?("C:/windows/fonts/wingding.ttf")
>
> puts File.executable?("C:/windows/fonts/wingding.ttf") # Prints
false only
> for me
>
>
>
> puts File.exists?("C:/windows/notepad.exe")
>
> puts File.readable?("C:/windows/notepad.exe")
>
> puts File.executable?("C:/windows/notepad.exe") # Prints false
only for me
>
>
>
> With the 1.9 binaries, File.executable? returns true only if the file
> extensions is something like .exe. Again, it always returns true for the
> people I have asked.
>
>
>
> Thanks,
>
> Shri
>
>
>
> _______________________________________________
> Ironruby-core mailing list
> Ironruby-core at rubyforge.org
> http://rubyforge.org/mailman/listinfo/ironruby-core
>
>

-- 
Michael Letterle
IronRuby MVP
http://blog.prokrams.com
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We should probably return true if the extension is in PATHEXT. This should
return true for EXE,COM, CMD, BAT, PS1 (if you have Powershell). It would be
nice if we could inspect whatever assoc touches, so that if I add an assoc and
filetype for RB, it becomes executable.

JD

From: ironruby-core-bounces at rubyforge.org [mailto:ironruby-core-bounces at
rubyforge.org] On Behalf Of Michael Letterle
Sent: Friday, April 03, 2009 12:04 PM
To: ironruby-core at rubyforge.org
Subject: Re: [Ironruby-core] FW: File.executable? always returns false on
Windows machine

On *nix systems it would return true if the executable bit is set and false if
it''s not.  Windows doesn''t really have a comparable attribute
since files are "categorized" based on extension, hence .exe acting as
a sort of "executable bit".
On Fri, Apr 3, 2009 at 1:36 PM, Shri Borde <Shri.Borde at
microsoft.com<mailto:Shri.Borde at microsoft.com>> wrote:

Anyone know what File.executable? is supposed to do? For me, it always returns
false. For Jim, Tomas and others, it always returns true no matter what the file
extension is. Any idea why we might be getting different results?



FWIW, the current IronRuby implementation returns true if the file extension is
".exe".



Thanks,

Shri



From: Shri Borde
Sent: Thursday, April 02, 2009 3:59 PM
To: ruby-core at ruby-lang.org<mailto:ruby-core at ruby-lang.org>
Subject: File.executable? always returns false on Windows machine



On my machine, File.executable? is always returning false. I have tried 1.8p27.
I am running on a Windows Vista x86 machine. The file system is NTFS. I
can''t think of anything unusual about my machine.



What are the semantic supposed to be? Most of the people I have asked get a
value of true for all of the statements below, even for the File.executable? on
the ttf file.



puts File.exists?("C:/windows/fonts/wingding.ttf")

puts File.readable?("C:/windows/fonts/wingding.ttf")

puts File.executable?("C:/windows/fonts/wingding.ttf") # Prints false
only for me



puts File.exists?("C:/windows/notepad.exe")

puts File.readable?("C:/windows/notepad.exe")

puts File.executable?("C:/windows/notepad.exe") # Prints false only
for me



With the 1.9 binaries, File.executable? returns true only if the file extensions
is something like .exe. Again, it always returns true for the people I have
asked.



Thanks,

Shri



_______________________________________________
Ironruby-core mailing list
Ironruby-core at rubyforge.org<mailto:Ironruby-core at rubyforge.org>
http://rubyforge.org/mailman/listinfo/ironruby-core



--
Michael Letterle
IronRuby MVP
http://blog.prokrams.com

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Yes, Windows does not have a comparable attribute. However, I can''t
figure out how MRI running on Windows implements this since I am getting a
different behavior than what other folks are. IronRuby uses the ".exe"
extension as a sort of "executable bit". Don''t know what MRI
on Windows does though. Like I said before, it always returns false for all file
extensions for me. It always returns true for all file extensions for Jim, Tomas
and others.

We need to try to figure out what MRI does, why MRI might be behaving
differently for me, and then use the same logic in IronRuby. Does MRI honor
PATHEXT?

Thanks,
Shri

From: ironruby-core-bounces at rubyforge.org [mailto:ironruby-core-bounces at
rubyforge.org] On Behalf Of Jim Deville
Sent: Friday, April 03, 2009 2:52 PM
To: ironruby-core at rubyforge.org
Subject: Re: [Ironruby-core] FW: File.executable? always returns false on
Windows machine

We should probably return true if the extension is in PATHEXT. This should
return true for EXE,COM, CMD, BAT, PS1 (if you have Powershell). It would be
nice if we could inspect whatever assoc touches, so that if I add an assoc and
filetype for RB, it becomes executable.

JD

From: ironruby-core-bounces at rubyforge.org [mailto:ironruby-core-bounces at
rubyforge.org] On Behalf Of Michael Letterle
Sent: Friday, April 03, 2009 12:04 PM
To: ironruby-core at rubyforge.org
Subject: Re: [Ironruby-core] FW: File.executable? always returns false on
Windows machine

On *nix systems it would return true if the executable bit is set and false if
it''s not.  Windows doesn''t really have a comparable attribute
since files are "categorized" based on extension, hence .exe acting as
a sort of "executable bit".
On Fri, Apr 3, 2009 at 1:36 PM, Shri Borde <Shri.Borde at
microsoft.com<mailto:Shri.Borde at microsoft.com>> wrote:

Anyone know what File.executable? is supposed to do? For me, it always returns
false. For Jim, Tomas and others, it always returns true no matter what the file
extension is. Any idea why we might be getting different results?



FWIW, the current IronRuby implementation returns true if the file extension is
".exe".



Thanks,

Shri



From: Shri Borde
Sent: Thursday, April 02, 2009 3:59 PM
To: ruby-core at ruby-lang.org<mailto:ruby-core at ruby-lang.org>
Subject: File.executable? always returns false on Windows machine



On my machine, File.executable? is always returning false. I have tried 1.8p27.
I am running on a Windows Vista x86 machine. The file system is NTFS. I
can''t think of anything unusual about my machine.



What are the semantic supposed to be? Most of the people I have asked get a
value of true for all of the statements below, even for the File.executable? on
the ttf file.



puts File.exists?("C:/windows/fonts/wingding.ttf")

puts File.readable?("C:/windows/fonts/wingding.ttf")

puts File.executable?("C:/windows/fonts/wingding.ttf") # Prints false
only for me



puts File.exists?("C:/windows/notepad.exe")

puts File.readable?("C:/windows/notepad.exe")

puts File.executable?("C:/windows/notepad.exe") # Prints false only
for me



With the 1.9 binaries, File.executable? returns true only if the file extensions
is something like .exe. Again, it always returns true for the people I have
asked.



Thanks,

Shri



_______________________________________________
Ironruby-core mailing list
Ironruby-core at rubyforge.org<mailto:Ironruby-core at rubyforge.org>
http://rubyforge.org/mailman/listinfo/ironruby-core



--
Michael Letterle
IronRuby MVP
http://blog.prokrams.com
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