Add getter for hasTerminal, terminalColumns and terminalLines on stdout.

runtime/bin/stdin_linux.cc

-// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-#include "platform/globals.h"
-#if defined(TARGET_OS_LINUX)
-
-#include <termios.h>  // NOLINT
-
-#include "bin/stdin.h"
-#include "bin/fdutils.h"
-
-
-namespace dart {
-namespace bin {
-
-int Stdin::ReadByte() {
-  FDUtils::SetBlocking(fileno(stdin));
-  int c = getchar();
-  if (c == EOF) {
-    c = -1;
-  }
-  FDUtils::SetNonBlocking(fileno(stdin));
-  return c;
-}
-
-
-bool Stdin::GetEchoMode() {
-  struct termios term;
-  tcgetattr(fileno(stdin), &term);
-  return (term.c_lflag & ECHO) != 0;
-}
-
-
-void Stdin::SetEchoMode(bool enabled) {
-  struct termios term;
-  tcgetattr(fileno(stdin), &term);
-  if (enabled) {
-    term.c_lflag |= ECHO|ECHONL;
-  } else {
-    term.c_lflag &= ~(ECHO|ECHONL);
-  }
-  tcsetattr(fileno(stdin), TCSANOW, &term);
-}
-
-
-bool Stdin::GetLineMode() {
-  struct termios term;
-  tcgetattr(fileno(stdin), &term);
-  return (term.c_lflag & ICANON) != 0;
-}
-
-
-void Stdin::SetLineMode(bool enabled) {
-  struct termios term;
-  tcgetattr(fileno(stdin), &term);
-  if (enabled) {
-    term.c_lflag |= ICANON;
-  } else {
-    term.c_lflag &= ~(ICANON);
-  }
-  tcsetattr(fileno(stdin), TCSANOW, &term);
-}
-
-}  // namespace bin
-}  // namespace dart
-
-#endif  // defined(TARGET_OS_LINUX)
-