DO NOT SUBMIT: Unix domain sockets. From CL 1061283003.

runtime/bin/file_macos.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_MACOS)
 
 #include "bin/file.h"
 
 #include <errno.h>  // NOLINT
@@ skipping 399 matching lines @@
   int stat_success;
   if (follow_links) {
     stat_success = NO_RETRY_EXPECTED(stat(pathname, &entry_info));
   } else {
     stat_success = NO_RETRY_EXPECTED(lstat(pathname, &entry_info));
   }
   if (stat_success == -1) return File::kDoesNotExist;
   if (S_ISDIR(entry_info.st_mode)) return File::kIsDirectory;
   if (S_ISREG(entry_info.st_mode)) return File::kIsFile;
   if (S_ISLNK(entry_info.st_mode)) return File::kIsLink;
+  if (S_ISSOCK(entry_info.st_mode)) return File::kIsFile;  // HACK.
   return File::kDoesNotExist;
 }
 
 
 File::Identical File::AreIdentical(const char* file_1, const char* file_2) {
   struct stat file_1_info;
   struct stat file_2_info;
   if (NO_RETRY_EXPECTED(lstat(file_1, &file_1_info)) == -1 ||
       NO_RETRY_EXPECTED(lstat(file_2, &file_2_info)) == -1) {
     return File::kError;
   }
   return (file_1_info.st_ino == file_2_info.st_ino &&
           file_1_info.st_dev == file_2_info.st_dev) ?
       File::kIdentical :
       File::kDifferent;
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_MACOS)