// Start starts the command and returns cross-interfaces to its standard input, output and error.
func (x *XCmd) Start() (xstdin circuit.X, xstdout, xstderr circuit.X, err error) {
//
stdin, err := x.cmd.StdinPipe()
if err != nil {
return nil, nil, nil, err
}
//
stdout, err := x.cmd.StdoutPipe()
if err != nil {
return nil, nil, nil, err
}
//
stderr, err := x.cmd.StderrPipe()
if err != nil {
return nil, nil, nil, err
}
//
if err = x.cmd.Start(); err != nil {
return nil, nil, nil, err
}
defer func() {
go x.cmd.Wait() // Calling wait is necessary, otherwise child remains zombie
}()
return xyio.NewXWriteCloser(stdin), xyio.NewXReadCloser(stdout), xyio.NewXReadCloser(stderr), nil
}
func (x XValve) Send() (circuit.X, error) {
w, err := x.Valve.Send()
if err != nil {
return nil, errors.Pack(err)
}
return xio.NewXWriteCloser(w), nil
}
func (x XContainer) Stdin() circuit.X {
return xio.NewXWriteCloser(x.Container.Stdin())
}
func (x XProc) Stdin() circuit.X {
return xio.NewXWriteCloser(x.Proc.Stdin())
}