From ac43836714eaf3b2bb5b5f38a77c1d669421bb8f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9o=20Lam?= <leo@innovatetechnologi.es>
Date: Sun, 26 Feb 2017 01:14:41 +0100
Subject: [PATCH] IOS/ES: Implement DeleteTitle

No idea why this wasn't implemented whereas ES_DeleteTicket and
ES_DeleteTitleContent were.

This probably fixes title deletion in old System Menus, and maybe
the new ones as well in some cases; I've seen 4.3 use this ioctlv.
---
 Source/Core/Core/IOS/ES/ES.cpp | 36 ++++++++++++++++++++++++++++++++++
 Source/Core/Core/IOS/ES/ES.h   |  1 +
 2 files changed, 37 insertions(+)

diff --git a/Source/Core/Core/IOS/ES/ES.cpp b/Source/Core/Core/IOS/ES/ES.cpp
index 57a430e7a3..7155a28c7f 100644
--- a/Source/Core/Core/IOS/ES/ES.cpp
+++ b/Source/Core/Core/IOS/ES/ES.cpp
@@ -272,6 +272,8 @@ IPCCommandResult ES::IOCtlV(const IOCtlVRequest& request)
     return GetTMDViews(request);
   case IOCTL_ES_GETCONSUMPTION:
     return GetConsumption(request);
+  case IOCTL_ES_DELETETITLE:
+    return DeleteTitle(request);
   case IOCTL_ES_DELETETICKET:
     return DeleteTicket(request);
   case IOCTL_ES_DELETETITLECONTENT:
@@ -849,6 +851,40 @@ IPCCommandResult ES::GetConsumption(const IOCtlVRequest& request)
   return GetDefaultReply(IPC_SUCCESS);
 }
 
+static bool CanDeleteTitle(u64 title_id)
+{
+  // IOS only allows deleting non-system titles (or a system title higher than 00000001-00000101).
+  return static_cast<u32>(title_id >> 32) != 0x00000001 || static_cast<u32>(title_id) > 0x101;
+}
+
+IPCCommandResult ES::DeleteTitle(const IOCtlVRequest& request)
+{
+  if (!request.HasNumberOfValidVectors(1, 0) || request.in_vectors[0].size != 8)
+    return GetDefaultReply(ES_PARAMETER_SIZE_OR_ALIGNMENT);
+
+  const u64 title_id = Memory::Read_U64(request.in_vectors[0].address);
+
+  if (!CanDeleteTitle(title_id))
+    return GetDefaultReply(ES_PARAMETER_SIZE_OR_ALIGNMENT);
+
+  const std::string title_dir =
+      StringFromFormat("%s/title/%08x/%08x/", RootUserPath(Common::FROM_SESSION_ROOT).c_str(),
+                       static_cast<u32>(title_id >> 32), static_cast<u32>(title_id));
+  if (!File::IsDirectory(title_dir) ||
+      !DiscIO::CNANDContentManager::Access().RemoveTitle(title_id, Common::FROM_SESSION_ROOT))
+  {
+    return GetDefaultReply(FS_ENOENT);
+  }
+
+  if (!File::DeleteDirRecursively(title_dir))
+  {
+    ERROR_LOG(IOS_ES, "DeleteTitle: Failed to delete title directory: %s", title_dir.c_str());
+    return GetDefaultReply(FS_EACCESS);
+  }
+
+  return GetDefaultReply(IPC_SUCCESS);
+}
+
 IPCCommandResult ES::DeleteTicket(const IOCtlVRequest& request)
 {
   u64 TitleID = Memory::Read_U64(request.in_vectors[0].address);
diff --git a/Source/Core/Core/IOS/ES/ES.h b/Source/Core/Core/IOS/ES/ES.h
index 045fc75f36..29e2bedff7 100644
--- a/Source/Core/Core/IOS/ES/ES.h
+++ b/Source/Core/Core/IOS/ES/ES.h
@@ -175,6 +175,7 @@ private:
   IPCCommandResult GetTMDViewCount(const IOCtlVRequest& request);
   IPCCommandResult GetTMDViews(const IOCtlVRequest& request);
   IPCCommandResult GetConsumption(const IOCtlVRequest& request);
+  IPCCommandResult DeleteTitle(const IOCtlVRequest& request);
   IPCCommandResult DeleteTicket(const IOCtlVRequest& request);
   IPCCommandResult DeleteTitleContent(const IOCtlVRequest& request);
   IPCCommandResult GetStoredTMDSize(const IOCtlVRequest& request);