From: Jatinder Singh <jatinder.saundh@...>
Date: 2006-06-13T13:39:38+09:00
Subject: Re: win32-open3 module: giving a name to a Process

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Hi,

Now I need to create a process with a name(the process is an instance of
webrick server).
I can create a webrick instance using following command,(this is not a
blocking call, it returns immediately..thats what I want)
input, out, err, @pid = Open4.popen4('D:\ruby\bin\ruby
C:\InstantRails\rails_apps\app1\script\server -p 3002')

Now at later point of time I would like to kill this process which I can
ofcourse do using
Process.kill(9, @pid)

It may very well happen that process was killed externally, hence in that
case I am first finding out if process with @pid is still alive by calling
Process.kill(0,@pid) (it gives an error it the process is not alive, which I
am catching)

My assumption in above case is that the webrick instance I had created
earlier using popen4 method is still running with @pid; it may very well
happen that webrick instance was killed externally and @pid was taken up by
some other process; this will result in killing of a innocent process.
I was thinking if I could assign a name to a process and then later on while
killing, verify the name, then that would solve the problem.
But how do I assign a name to a process while creating a process using
popen4 method and then how do I find the pid of a process by name.


Help is appreciated!

Regards,
Jatinder



On 6/12/06, Jatinder Singh <jatinder.saundh@gmail.com> wrote:
>
> Thanks this open3.so works!
>
> -Jatinder
>
>
>
> On 6/12/06, Park Heesob <phasis68@hotmail.com> wrote:
> >
> >
> >
> > Hi,
> >
> > >From: "Jatinder Singh" <jatinder.saundh@gmail.com>
> > >Reply-To: ruby-talk@ruby-lang.org
> > >To: ruby-talk@ruby-lang.org (ruby-talk ML)
> > >Subject: Re: Instructions for downloading and installing win32-open3
> > module
> > >Date: Mon, 12 Jun 2006 21:45:52 +0900
> > >
> > >Hi,
> > >
> > >I was able to get around with the installation by renaming the so file
> to
> > >open3.so and putting it in the mentioned folder, but now on executing
> the
> > >ruby program I get following error,
> > >
> > >
> > >
> > >check.rb:3: [BUG] Segmentation fault
> > >ruby 1.8.4 (2005-12-24) [i386-mswin32]
> > >
> > >
> > >This application has requested the Runtime to terminate it in an
> unusual
> > >way.
> > >Please contact the application's support team for more information.
> > >Following are the contents of ruby program,
> > >
> > >require "win32/open3"
> > >
> > >input, out, err, @pid = Open4.popen4('dir')
> > >
> > >
> > >
> > >Help Appreciated!
> > >
> > >Thanks
> > >
> > >Jatinder
> > >
> > Same as win32-serivce.so, you can download "open3.so" at
> > http://home.nownuri.net/~phasis/open3.so
> > and copy to ruby\lib\ruby\site_ruby\1.8\i386-msvcrt\win32 directory
> >
> > Soon or later, the segfaulting binary files will be replaced with
> correct
> > version.
> >
> > Regards,
> >
> > Park Heesob
> >
> >
> >
> >
>
>

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