Fix recursive directory-deletion of top-level files/links.

runtime/bin/directory_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/directory.h"
 
 #include <dirent.h>  // NOLINT
@@ skipping 203 matching lines @@
     success = false;
     PostError(listing, path->data);
   }
 
   return success;
 }
 
 
 static bool DeleteFile(char* file_name,
                        PathBuffer* path) {
-  return path->Add(file_name) && remove(path->data) == 0;
+  return path->Add(file_name) && unlink(path->data) == 0;
 }
 
 
 static bool DeleteDir(char* dir_name,
                       PathBuffer* path) {
   if (strcmp(dir_name, ".") == 0) return true;
   if (strcmp(dir_name, "..") == 0) return true;
   return path->Add(dir_name) && DeleteRecursively(path);
 }
 
 
 static bool DeleteRecursively(PathBuffer* path) {
   // Do not recurse into links for deletion. Instead delete the link.
+  // If it's a file, delete it.
   struct stat st;
   if (TEMP_FAILURE_RETRY(lstat(path->data, &st)) == -1) {
     return false;
-  } else if (S_ISLNK(st.st_mode)) {
-    if (TEMP_FAILURE_RETRY(stat(path->data, &st)) == -1) {
-      return false;
-    } else if (S_ISDIR(st.st_mode)) {
-      return (unlink(path->data) == 0);
-    }
+  } else if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode)) {
+    return (unlink(path->data) == 0);
   }
 
   if (!path->Add(File::PathSeparator())) return false;
 
   // Not a link. Attempt to open as a directory and recurse into the
   // directory.
   DIR* dir_pointer;
   do {
     dir_pointer = opendir(path->data);
   } while (dir_pointer == NULL && errno == EINTR);
@@ skipping 171 matching lines @@
 }
 
 
 bool Directory::Rename(const char* path, const char* new_path) {
   ExistsResult exists = Exists(path);
   if (exists != EXISTS) return false;
   return (TEMP_FAILURE_RETRY(rename(path, new_path)) == 0);
 }
 
 #endif  // defined(TARGET_OS_LINUX)