[cryptohome] make guest-mode homedir mount with -rwx------

platform.h

 // Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CRYPTOHOME_PLATFORM_H_
 #define CRYPTOHOME_PLATFORM_H_
 
 #include <base/basictypes.h>
 #include <chromeos/utility.h>
+#include <sys/stat.h>
 #include <set>
 #include <string>
 #include <vector>
 
 namespace cryptohome {
 
 // Default mount options
 extern const int kDefaultMountOptions;
 // Default length to use in call to getpwnam_r if the system default is not
 // available
@@ skipping 125 matching lines @@
   // Calls the platform chown() function recursively on the directory
   //
   // Parameters
   //   directory - The directory to set ownership on
   //   user_id - The user_id to assign ownership to
   //   group_id - The group_id to assign ownership to
   virtual bool SetOwnershipRecursive(const std::string& directory,
                                      uid_t user_id,
                                      gid_t group_id);
 
+  // Calls the platform chmod() function on the given path.
+  //
+  // The path may be a directory or a file.
+  //
+  // Parameters
+  //   path - The path to set ownership on
+  //   new_perms - an OR'd together bitfield of permissions per chmod(2)
+  virtual bool SetPermissions(const std::string& path, mode_t new_perms);

[Will Drewry, 2011/04/21 21:42:09]

nit: mind adding it to mock_platform.h?

+
   // Sets the current umask, returning the old mask
   //
   // Parameters
   //   new_mask - The mask to set
   virtual int SetMask(int new_mask);
 
   // Returns the user and group ids for a user
   //
   // Parameters
   //   user - The username to query for
@@ skipping 171 matching lines @@
  private:
   std::vector<std::string> cmd_line_;
   std::set<std::string> open_files_;
   std::string cwd_;
   int process_id_;
 };
 
 }  // namespace cryptohome
 
 #endif  // CRYPTOHOME_PLATFORM_H_