Added confirmation for printer registration.

cloud_print/gcp20/prototype/conio_posix.cc

Index: cloud_print/gcp20/prototype/conio_posix.cc
diff --git a/cloud_print/gcp20/prototype/conio_posix.cc b/cloud_print/gcp20/prototype/conio_posix.cc
new file mode 100644
index 0000000000000000000000000000000000000000..de5d99fe2a1b7d3301aa8145287186c06939af14
--- /dev/null
+++ b/cloud_print/gcp20/prototype/conio_posix.cc
@@ -0,0 +1,49 @@
+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "cloud_print/gcp20/prototype/conio_posix.h"
+
+#include <stdio.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <termios.h>
+#include <unistd.h>
+
+void SetTemporaryTermiosSettings(bool temporary) {
+  static termios oldt, newt;
+
+  if (temporary) {
+    tcgetattr(STDIN_FILENO, &oldt);
+    newt = oldt;
+    newt.c_lflag &= ~ICANON;  // Disable buffered IO.
+    tcsetattr(STDIN_FILENO, TCSANOW, &newt);
+  } else {
+    tcsetattr(STDIN_FILENO, TCSANOW, &oldt);  // Restore default settings.
+  }
+}
+
+int kbhit() {
+  SetTemporaryTermiosSettings(true);
+
+  timeval tv;
+  fd_set rdfs;
+
+  tv.tv_sec = 0;
+  tv.tv_usec = 0;
+
+  FD_ZERO(&rdfs);
+  FD_SET(STDIN_FILENO, &rdfs);
+  select(STDIN_FILENO + 1, &rdfs, NULL, NULL, &tv);
+  SetTemporaryTermiosSettings(false);
+
+  return FD_ISSET(STDIN_FILENO, &rdfs);
+}
+
+int getche() {
+  SetTemporaryTermiosSettings(true);
+  int c = getchar();
+  SetTemporaryTermiosSettings(false);
+  return c;
+}
+