Module: ChildProcess::Windows::Lib

Extended by:
FFI::Library
Defined in:
lib/childprocess/windows.rb,
lib/childprocess/windows/constants.rb,
lib/childprocess/windows/functions.rb

Class Method Summary collapse

Class Method Details

.create_proc(cmd, opts = {}) ⇒ Object 



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# File 'lib/childprocess/windows/functions.rb', line 17

def self.create_proc(cmd, opts = {})
  cmd_ptr = FFI::MemoryPointer.from_string cmd

  si = StartupInfo.new
  pi = ProcessInfo.new

  ok = create_process(nil, cmd_ptr, nil, nil, !!opts[:inherit], 0, nil, nil, si, pi)
  ok or raise Error, last_error_message

  close_handle pi[:hProcess]
  close_handle pi[:hThread]

  pi[:dwProcessId]
end

.last_error_message ⇒ Object 



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# File 'lib/childprocess/windows/functions.rb', line 5

def self.last_error_message
  errnum = get_last_error
  buf = FFI::MemoryPointer.new :char, 512

  size = format_message(
    FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_ARGUMENT_ARRAY,
    nil, errnum, 0, buf, buf.size, nil
  )

  buf.read_string(size).strip
end