Set correct quota project ID on application directories.
Use PrepareAppDirsFromRoot() to setup the quota project ID on
application-specific directories correctly. App directories use
AID_EXT_GID_START + their application ID offset, whereas cache
directories use AID_CACHE_GID_START. This is consistent with the GIDs
sdcardfs used to label these directories with.
Bug: 146419093
Test: verified project IDs with lsattr -p
Change-Id: Idca8a30d185012efb0d19ceb9b346b9a4de34f18
diff --git a/Utils.h b/Utils.h
index ec42f39..90ae8c6 100644
--- a/Utils.h
+++ b/Utils.h
@@ -56,7 +56,8 @@
int SetQuotaProjectId(std::string path, long projectId);
/*
* Recursively calls fs_prepare_dir() on all components in 'path', starting at 'root'.
- * 'path' must start with 'root'
+ * 'path' must start with 'root'. Sets up quota project IDs correctly.
+ *
* ONLY for use with app-specific data directories on external storage!
* (eg, /Android/data/com.foo, /Android/obb/com.foo, etc.)
*/