Workaround for wrong file permissions from zstd extraction on wasm

Signed-off-by: falkTX <falktx@falktx.com>

include/common.hpp

@@ -30,6 +30,19 @@
 
 #include_next "common.hpp"
 
+// Workaround for wrong file permissions from zstd extraction
+#ifdef __EMSCRIPTEN__
+#define fopen fopen_wasm
+
+extern "C" {
+FILE* fopen_wasm(const char* filename, const char* mode);
+}
+
+namespace std {
+	using ::fopen_wasm;
+}
+#endif
+
 // Make binary resources work the same no matter the OS
 #undef BINARY
 #undef BINARY_START

src/override/common.cpp

@@ -34,7 +34,7 @@
 
 #include "DistrhoPluginUtils.hpp"
 
-#if defined ARCH_WIN
+#if defined(ARCH_WIN)
 #include <windows.h>
 
 FILE* fopen_u8(const char* filename, const char* mode) {
@@ -43,6 +43,15 @@ FILE* fopen_u8(const char* filename, const char* mode) {
 	return _wfopen(rack::string::UTF8toUTF16(filename).c_str(), rack::string::UTF8toUTF16(mode).c_str());
 }
 
+#elif defined(DISTRHO_OS_WASM)
+#include <sys/stat.h>
+#undef fopen
+
+FILE* fopen_wasm(const char* filename, const char* mode) {
+	chmod(filename, 0777);
+	return std::fopen(filename, mode);
+}
+
 #endif