From: Robert Klemme <bob.news@...>
Date: 2003-09-22T21:49:44+09:00
Subject: Re: fork not available?

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"Austin Ziegler" <austin@halostatue.ca> schrieb im Newsbeitrag
news:2003919133052.522296@PADD...
> On Sat, 20 Sep 2003 01:50:32 +0900, walter@mwsewall.com wrote:
> > I am running windows 2000 using the PragProgs install.
> >
> >
> > I have tried fork but get an unimplemented on this machine error.  I
have
> > tried this on multiple windows 2000 machines and get the same error.
>
> I believe that Windows doesn't support fork().

I know there's a problem with popen() but AFAIK fork() does work on
Windows.  The attached script produced expected output with ruby on
cygwin:

13:58:35 [ruby]: ruby -w forks.rb
1.8.0
Testing: /bin/ls
CHILD 2228
forks.rb:23: warning: Insecure world writable dir /cygdrive/c, mode 040777
blah.rb        extract.rb.bak  forks.rb.bak    fw.rb.bak      ip.rb.bak
client.rb      fact.rb         fw-http.rb      garble.rb      junctions.rb
client.rb.bak  fact.rb.bak     fw-http.rb.bak  garble.rb.bak
junctions.rb.bak
extract.rb     forks.rb        fw.rb           ip.rb          keynames.txt
FINISH 2032 - 2228
Testing: /bin/sleep 1000
CHILD 2692
forks.rb:23: warning: Insecure world writable dir /cygdrive/c, mode 040777
TIMEOUT
13:58:46 [ruby]:

Regards

    robert

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def test( cmd, *args )
  puts "Testing: #{cmd} #{args.join ' '}"
  stat = nil
  pid = fork

  if pid
    # parent
    old = trap( "CLD" ) do
      stat = true
    end

    sleep 10
    trap( "CLD", old )

    unless stat
      puts "TIMEOUT"
    else
      stat = Process.wait
      puts "FINISH #{$$} - #{pid}"
    end
  else
    puts "CHILD #{$$}"
    exec( cmd, *args )
  end
end

puts RUBY_VERSION

test( "/bin/ls" )


test( "/bin/sleep", "1000" )

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