From: Park Heesob <phasis68@...>
Date: 2006-11-10T19:27:50+09:00
Subject: Re: win32/process question


Hi,

>From: J-Van <joevandyk@gmail.com>
>Reply-To: ruby-talk@ruby-lang.org
>To: ruby-talk@ruby-lang.org (ruby-talk ML)
>Subject: Re: win32/process question
>Date: Fri, 10 Nov 2006 15:23:58 +0900
>
>I guess I should note that this is after I require 'win32/process'
>(which is installed via a gem).
>
>On 11/9/06, J-Van <joevandyk@gmail.com> wrote:
>>On Windows XP, Ruby 1.8.5:
>>
>># start notepad
>>irb(main):003:0> info = Process.create :app_name => "notepad"
>>=> #<struct Struct::ProcessInfo process_handle=1916,
>>thread_handle=1912, process_id=3536, thread_id=3088>
>>
>># notepad running
>>irb(main):004:0> Process.kill 0, info.process_id
>>=> [3536]
>>
>># kill notepad
>>irb(main):005:0> Process.kill 9, info.process_id
>>=> [3536]
>>
>># notepad's dead, but why doesn't this throw an exception?!
>>irb(main):006:0> Process.kill 0, info.process_id
>>=> [3536]
>>
>>Any ideas?
>>Thanks,
>>Joe
>>
>
Refer to http://msdn2.microsoft.com/fr-fr/library/ms686722.aspx,
"While open handles to kernel objets are closed automatically when a process 
terminates, the objects themselves exist until all open handles to them are 
closed. Therefore, an object will remain valid after a process that is using 
it terminates if another process has an open handle to it."

Here is the working code.

irb(main):001:0> require 'win32/process'
=> true
irb(main):002:0> include Windows::Handle
=> Object
irb(main):003:0> info = Process.create :app_name=>'notepad'
=> #<struct Struct::ProcessInfo process_handle=1916, thread_handle=1912, 
process
_id=1748, thread_id=1108>
irb(main):004:0> Process.kill 0,info.process_id
=> [1748]
irb(main):005:0> Process.kill 9,info.process_id
=> [1748]
irb(main):006:0> CloseHandle(info.process_handle)
=> true
irb(main):007:0> CloseHandle(info.thread_handle)
=> true
irb(main):008:0> Process.kill 0,info.process_id
ProcessError: The parameter is incorrect.
        from 
c:/ruby/lib/ruby/gems/1.8/gems/win32-process-0.5.1/lib/win32/proces
s.rb:156:in `kill'
        from 
c:/ruby/lib/ruby/gems/1.8/gems/win32-process-0.5.1/lib/win32/proces
s.rb:132:in `each'
        from 
c:/ruby/lib/ruby/gems/1.8/gems/win32-process-0.5.1/lib/win32/proces
s.rb:132:in `kill'
        from (irb):8


Regards,

Park Heesob

_________________________________________________________________
Don't just search. Find. Check out the new MSN Search! 
http://search.msn.click-url.com/go/onm00200636ave/direct/01/