Method: SensibleSwing::MainWindow#system_blocking

Defined in:

lib/gui/base.rb

#system_blocking(command, low_prio = false) ⇒ Object

# File 'lib/gui/base.rb', line 361

def system_blocking command, low_prio = false
  return true if command =~ /^@rem/ # JRUBY-5890 bug
  if low_prio
    out = IO.popen(command) # + " 2>&1"
    low_prio = 64 # from msdn
    
    if command =~ /(ffmpeg|mencoder)/
      # XXXX not sure if there's a better way...because some *are* complex and have ampersands...
      # unfortunately have to check for nil because it could exit too early [?]
      exe_name = $1 + '.exe'
      begin
        p = proc{ ole = ::WMI::Win32_Process.find(:first,  :conditions => {'Name' => exe_name}); sleep 1 unless ole; ole }
        piddy = p.call || p.call || p.call # we actually do need this to loop...guess we're too quick
        # but the first time through this still inexplicably fails all 3...odd
        piddys = ::WMI::Win32_Process.find(:all,  :conditions => {'Name' => exe_name})
        for piddy in piddys
          # piddy.SetPriority low_prio # this call can seg fault at times...JRUBY-5422
          pid = piddy.ProcessId # this doesn't seg fault, tho
          system_original("vendor\\setpriority -lowest #{pid}") # uses PID for the command line
        end
      rescue Exception => e
        p 'warning, got exception trying to set priority [jruby prob? ...]', e
      end
    end
    print out.read # let it finish
    out.close
    $?.exitstatus == 0 # 0 means success
  else
    raise command + " failed env #{ENV['PATH']}" unless system_original command
  end
end