Module: Session::Spawn

Defined in:
lib/session.rb

Overview

class IDL

Class Method Summary collapse

Class Method Details

.spawn(command) ⇒ Object 



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# File 'lib/session.rb', line 623

def spawn command
  ipath = tmpfifo
  opath = tmpfifo
  epath = tmpfifo

  cmd = "#{ command } < #{ ipath } 1> #{ opath } 2> #{ epath } &"
  system cmd 

  i = open ipath, 'w'
  o = open opath, 'r'
  e = open epath, 'r'

  [i,o,e]
end

.tmpfifo ⇒ Object 



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# File 'lib/session.rb', line 637

def tmpfifo
  path = nil
  42.times do |i|
    tpath = File::join(Dir::tmpdir, "#{ $$ }.#{ rand }.#{ i }")
    v = $VERBOSE
    begin
      $VERBOSE = nil
      system "mkfifo #{ tpath }"
    ensure
      $VERBOSE = v 
    end
    next unless $? == 0
    path = tpath
    at_exit{ File::unlink(path) rescue STDERR.puts("rm <#{ path }> failed") }
    break
  end
  raise "could not generate tmpfifo" unless path
  path
end