Fix exiting when running some payloads (like the nand dumper)

Dockerfile

@@ -1,3 +1,3 @@
-FROM ghcr.io/wiiu-env/devkitppc:20240423
+FROM ghcr.io/wiiu-env/devkitppc:20240505
 
 WORKDIR project

Makefile

@@ -127,7 +127,7 @@ export OUTPUT	:=	$(CURDIR)/$(TARGET)
 
 #---------------------------------------------------------------------------------
 $(BUILD):
-	@[ -d $@ ] || mkdir -p $@
+	@$(shell [ ! -d $(BUILD) ] && mkdir -p $(BUILD))
 	@$(MAKE) --no-print-directory -C $(BUILD) -f $(CURDIR)/Makefile
 
 

src/main.cpp

@@ -57,11 +57,16 @@ extern "C" uint32_t start_wrapper(int argc, char **argv) {
 
     DEBUG_FUNCTION_LINE_VERBOSE("Hello from payload.elf multiloader");
 
-    VPADReadError err;
-    VPADStatus vpad_data;
-    VPADRead(VPAD_CHAN_0, &vpad_data, 1, &err);
-
-    uint32_t btn = vpad_data.hold | vpad_data.trigger;
+    VPADStatus vpadStatus{};
+    VPADReadError vpadError = VPAD_READ_UNINITIALIZED;
+    int btn                 = 0;
+    do {
+        if (VPADRead(VPAD_CHAN_0, &vpadStatus, 1, &vpadError) > 0 && vpadError == VPAD_READ_SUCCESS) {
+            btn = vpadStatus.trigger | vpadStatus.hold;
+        } else {
+            OSSleepTicks(OSMillisecondsToTicks(1));
+        }
+    } while (vpadError == VPAD_READ_NO_SAMPLES);
 
     std::map<std::string, std::string> payloads = get_all_payloads("wiiu/payloads");
 
@@ -118,6 +123,7 @@ extern "C" int _start(int argc, char **argv) {
     if (entryPoint != 0) {
         res = ((int (*)(int, char **)) entryPoint)(argc, argv);
     }
+    _Exit(0);
     return res;
 }