// 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) Recv() (circuit.X, error) {
r, err := x.Valve.Recv()
if err != nil {
return nil, errors.Pack(err)
}
return xio.NewXReadCloser(r), nil
}
func (x XServer) Profile(name string) (circuit.X, error) {
r, err := x.server.Profile(name)
if err != nil {
return nil, errors.Pack(err)
}
return xio.NewXReadCloser(r), nil
}
func (x XContainer) Stderr() circuit.X {
return xio.NewXReadCloser(x.Container.Stderr())
}
func (x XProc) Stderr() circuit.X {
return xio.NewXReadCloser(x.Proc.Stderr())
}