FINALLY, real UNIX-style process mgmt on JRuby

gistfile1.txt

system ~/projects/jruby $ cat blah.rb
in_c, in_p = IO.pipe
out_p, out_c = IO.pipe
err_p, err_c = IO.pipe
pid = spawn('cat', :in => in_c, :out => out_c, :err => err_c)
[in_c, out_c, err_c].each(&:close)
in_p.puts("hello, world")
in_p.close
puts out_p.read
Process.waitpid(pid)

system ~/projects/jruby $ jruby blah.rb
hello, world

source.rb

in_c, in_p = IO.pipe
out_p, out_c = IO.pipe
err_p, err_c = IO.pipe

pid = spawn('cat -n',
  :in => in_c,
  :out => out_c,
  :err => err_c)

[in_c, out_c, err_c].each(&:close)

in_p.puts("hello, world")
in_p.close

puts out_p.read # => "     1  hello, world"

Process.waitpid(pid)