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

platform.h

Index: platform.h
diff --git a/platform.h b/platform.h
index 78bb6c6816983e94b431a9fc5c39a5319d413af7..84c37649ef64f9f111ef750f8fe8d83fd4da069b 100644
--- a/platform.h
+++ b/platform.h
@@ -7,6 +7,7 @@
 
 #include <base/basictypes.h>
 #include <chromeos/utility.h>
+#include <sys/stat.h>
 #include <set>
 #include <string>
 #include <vector>
@@ -152,6 +153,15 @@ class Platform {
                                      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