Handle /dev/null on linux, as an closed device.

runtime/bin/eventhandler_linux.cc

 // Copyright (c) 2012, 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 "bin/eventhandler.h"
 
 #include <errno.h>  // NOLINT
@@ skipping 66 matching lines @@
                                             sd->fd(),
                                             &event));
     } else {
       status = TEMP_FAILURE_RETRY(epoll_ctl(epoll_fd_,
                                             EPOLL_CTL_ADD,
                                             sd->fd(),
                                             &event));
       sd->set_tracked_by_epoll(true);
     }
     if (status == -1) {
-      FATAL1("Failed updating epoll instance: %s", strerror(errno));
+      // Epoll does not accept the file descriptor. It could be due to
+      // already closed file descriptor, or unuspported devices, such
+      // as /dev/null. In such case, mark the file descriptor as closed,
+      // so dart will handle it accordingly.
+      sd->set_tracked_by_epoll(false);
+      sd->ShutdownRead();
+      sd->ShutdownWrite();
+      DartUtils::PostInt32(sd->port(), 1 << kCloseEvent);
     }
   }
 }
 
 
 EventHandlerImplementation::EventHandlerImplementation()
     : socket_map_(&HashMap::SamePointerValue, 16) {
   intptr_t result;
   result = TEMP_FAILURE_RETRY(pipe(interrupt_fds_));
   if (result != 0) {
@@ skipping 318 matching lines @@
   return reinterpret_cast<void*>(fd + 1);
 }
 
 
 uint32_t EventHandlerImplementation::GetHashmapHashFromFd(intptr_t fd) {
   // The hashmap does not support keys with value 0.
   return dart::Utils::WordHash(fd + 1);
 }
 
 #endif  // defined(TARGET_OS_LINUX)