Function showMOTD

agent/agentssh/agentssh.go:1317–1333

showMOTD will output the message of the day from the given filename to dest, if the file exists. https://github.com/openssh/openssh-portable/blob/25bd659cc72268f2858c5415740c442ee950049f/session.c#L784

(fs afero.Fs, dest io.Writer, filename string)

//
// https://github.com/openssh/openssh-portable/blob/25bd659cc72268f2858c5415740c442ee950049f/session.c#L784
func showMOTD(fs afero.Fs, dest io.Writer, filename string) error {
	if filename == "" {
		return nil
	}

	f, err := fs.Open(filename)
	if err != nil {
		if xerrors.Is(err, os.ErrNotExist) {
			// This is not an error, there simply isn't a MOTD to show.
			return nil
		}
		return xerrors.Errorf("open MOTD: %w", err)
	}
	defer f.Close()

	return writeWithCarriageReturn(f, dest)
}

// writeWithCarriageReturn writes each line with a carriage return to ensure
// that each line starts at the beginning of the terminal.