newConPty creates a PTY backed by a Windows PseudoConsole (ConPTY). This should only be used when a process will be attached via Start().
(opt ...Option)
| 47 | // newConPty creates a PTY backed by a Windows PseudoConsole (ConPTY). This |
| 48 | // should only be used when a process will be attached via Start(). |
| 49 | func newConPty(opt ...Option) (*ptyWindows, error) { |
| 50 | var opts ptyOptions |
| 51 | for _, o := range opt { |
| 52 | o(&opts) |
| 53 | } |
| 54 | |
| 55 | pty := &ptyWindows{ |
| 56 | opts: opts, |
| 57 | } |
| 58 | |
| 59 | var err error |
| 60 | pty.inputRead, pty.inputWrite, err = os.Pipe() |
| 61 | if err != nil { |
| 62 | return nil, err |
| 63 | } |
| 64 | pty.outputRead, pty.outputWrite, err = os.Pipe() |
| 65 | if err != nil { |
| 66 | _ = pty.inputRead.Close() |
| 67 | _ = pty.inputWrite.Close() |
| 68 | return nil, err |
| 69 | } |
| 70 | |
| 71 | // Default dimensions |
| 72 | width, height := 80, 80 |
| 73 | if opts.sshReq != nil { |
| 74 | if w := opts.sshReq.Window.Width; w > 0 && w <= 65535 { |
| 75 | width = w |
| 76 | } |
| 77 | if h := opts.sshReq.Window.Height; h > 0 && h <= 65535 { |
| 78 | height = h |
| 79 | } |
| 80 | } |
| 81 | |
| 82 | consoleSize := uintptr(width) + (uintptr(height) << 16) |
| 83 | |
| 84 | ret, _, err := procCreatePseudoConsole.Call( |
| 85 | consoleSize, |
| 86 | uintptr(pty.inputRead.Fd()), |
| 87 | uintptr(pty.outputWrite.Fd()), |
| 88 | 0, |
| 89 | uintptr(unsafe.Pointer(&pty.console)), |
| 90 | ) |
| 91 | // CreatePseudoConsole returns S_OK on success, as per: |
| 92 | // https://learn.microsoft.com/en-us/windows/console/createpseudoconsole |
| 93 | if windows.Handle(ret) != windows.S_OK { |
| 94 | _ = pty.Close() |
| 95 | return nil, xerrors.Errorf("create pseudo console (%d): %w", int32(ret), err) |
| 96 | } |
| 97 | |
| 98 | return pty, nil |
| 99 | } |
| 100 | |
| 101 | type ptyWindows struct { |
| 102 | opts ptyOptions |