dmnt-cheat: make cheats default toggle configurable

common/defaults/system_settings.ini

@@ -9,3 +9,6 @@ usb30_force_enabled = u8!0x0
 ; Make the power menu's "reboot" button reboot to payload.
 ; Set to "normal" for normal reboot, "rcm" for rcm reboot.
 power_menu_reboot_function = str!payload
+; Controls whether dmnt cheats should be enabled or disabled
+; by default. 1 = enabled by default, 0 = disabled by default.
+dmnt_cheats_enabled_by_default = u8!0x1

stratosphere/dmnt/dmnt.json

@@ -26,6 +26,7 @@
         "sfdnsres",
         "bsdcfg",
         "set",
+        "set:sys",
         "fsp-srv",
         "fatal:u",
         "hid"

stratosphere/dmnt/source/dmnt_cheat_manager.cpp

@@ -30,6 +30,9 @@ static DmntCheatVm *g_cheat_vm;
 static CheatProcessMetadata g_cheat_process_metadata = {0};
 static Handle g_cheat_process_debug_hnd = 0;
 
+/* Should we enable cheats by default? */
+static bool g_enable_cheats_by_default = true;
+
 /* For debug event thread management. */
 static HosMutex g_debug_event_thread_lock;
 static bool g_has_debug_events_thread = false;
@@ -383,10 +386,15 @@ bool DmntCheatManager::ParseCheats(const char *s, size_t len) {
         }
     }
     
+    /* Master cheat can't be disabled. */
+    if (g_cheat_entries[0].definition.num_opcodes > 0) {
+        g_cheat_entries[0].enabled = true;
+    }
+    
     /* Enable all entries we parsed. */
-    for (size_t i = 0; i < DmntCheatManager::MaxCheatCount; i++) {
+    for (size_t i = 1; i < DmntCheatManager::MaxCheatCount; i++) {
         if (g_cheat_entries[i].definition.num_opcodes > 0) {
-            g_cheat_entries[i].enabled = true;
+            g_cheat_entries[i].enabled = g_enable_cheats_by_default;
         }
     }
     
@@ -501,6 +509,10 @@ Result DmntCheatManager::ToggleCheat(u32 cheat_id) {
         return ResultDmntCheatUnknownChtId;
     }
     
+    if (cheat_id == 0) {
+        return ResultDmntCheatCannotDisableMasterCheat;
+    }
+    
     entry->enabled = !entry->enabled;
     
     /* Trigger a VM reload. */
@@ -935,6 +947,14 @@ void DmntCheatManager::InitializeCheatManager() {
     /* Create cheat vm. */
     g_cheat_vm = new DmntCheatVm();
     
+    /* Learn whether we should enable cheats by default. */
+    {
+        u8 en;
+        if (R_SUCCEEDED(setsysGetSettingsItemValue("atmosphere", "dmnt_cheats_enabled_by_default", &en, sizeof(en)))) {
+            g_enable_cheats_by_default = (en != 0);
+        }
+    }
+    
     /* Spawn application detection thread, spawn cheat vm thread. */
     if (R_FAILED(g_detect_thread.Initialize(&DmntCheatManager::DetectThread, nullptr, 0x4000, 39))) {
         std::abort();

stratosphere/dmnt/source/dmnt_main.cpp

@@ -99,6 +99,11 @@ void __appInit(void) {
         fatalSimple(rc);
     }
     
+    rc = setsysInitialize();
+    if (R_FAILED(rc)) {
+        fatalSimple(rc);
+    }
+    
     rc = hidInitialize();
     if (R_FAILED(rc)) {
         fatalSimple(rc);
@@ -122,6 +127,7 @@ void __appExit(void) {
     fsdevUnmountAll();
     fsExit();
     hidExit();
+    setsysExit();
     setExit();
     lrExit();
     nsdevExit();

stratosphere/dmnt/source/dmnt_results.hpp

@@ -29,6 +29,7 @@ static constexpr Result ResultDmntCheatInvalidBuffer = MAKERESULT(Module_Dmnt, 6
 static constexpr Result ResultDmntCheatUnknownChtId              = MAKERESULT(Module_Dmnt, 6503);
 static constexpr Result ResultDmntCheatOutOfCheats               = MAKERESULT(Module_Dmnt, 6504);
 static constexpr Result ResultDmntCheatInvalidCheat              = MAKERESULT(Module_Dmnt, 6505);
+static constexpr Result ResultDmntCheatCannotDisableMasterCheat  = MAKERESULT(Module_Dmnt, 6505);
 
 static constexpr Result ResultDmntCheatInvalidFreezeWidth     = MAKERESULT(Module_Dmnt, 6600);
 static constexpr Result ResultDmntCheatAddressAlreadyFrozen   = MAKERESULT(Module_Dmnt, 6601);