[NaCl SDK] Enable select/poll on TTY nodes.

native_client_sdk/src/libraries/nacl_io/mount_node_tty.cc

 // Copyright (c) 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 "nacl_io/mount_node_tty.h"
 
 #include <assert.h>
 #include <errno.h>
 #include <stdio.h>
 #include <string.h>
@@ skipping 211 matching lines @@
       }
     }
 
     if (!skip)
       input_buffer_.push_back(c);
 
     if (c == '\n' || c == termios_.c_cc[VEOF] || !IS_ICANON)
       is_readable_ = true;
   }
 
-  if (is_readable_)
+  if (is_readable_) {
+    RaiseEvent(POLLIN);
     pthread_cond_broadcast(&is_readable_cond_);
+  }
   return 0;
 }
 
 Error MountNodeTty::Ioctl(int request, char* arg) {
   if (request == TIOCNACLPREFIX) {
     // This ioctl is used to change the prefix for this tty node.
     // The prefix is used to distinguish messages intended for this
     // tty node from all the other messages cluttering up the
     // javascript postMessage() channel.
     AUTO_LOCK(node_lock_);
@@ skipping 18 matching lines @@
 }
 
 Error MountNodeTty::Tcsetattr(int optional_actions,
                          const struct termios *termios_p) {
   AUTO_LOCK(node_lock_);
   termios_ = *termios_p;
   return 0;
 }
 
 }