Remove invalid characters from save export/import paths.

source/core/util.c

@@ -511,3 +511,27 @@ const char* util_get_display_size_units(u64 size) {
 
     return "B";
 }
+
+void util_escape_file_name(char* out, const char* in, size_t size) {
+    static const char reservedChars[] = {'<', '>', ':', '"', '/', '\\', '|', '?', '*'};
+
+    for(u32 i = 0; i < size; i++) {
+        bool reserved = false;
+        for(u32 j = 0; j < sizeof(reservedChars); j++) {
+            if(in[i] == reservedChars[j]) {
+                reserved = true;
+                break;
+            }
+        }
+
+        if(reserved) {
+            out[i] = '_';
+        } else {
+            out[i] = in[i];
+        }
+
+        if(in[i] == '\0') {
+            break;
+        }
+    }
+}

source/core/util.h

@@ -73,3 +73,5 @@ Result util_close_archive(FS_Archive archive);
 
 double util_get_display_size(u64 size);
 const char* util_get_display_size_units(u64 size);
+
+void util_escape_file_name(char* out, const char* in, size_t size);

source/ui/section/action/exporttwlsave.c

@@ -65,8 +65,11 @@ static Result action_export_twl_save_open_dst(void* data, u32 index, void* initi
     FS_Archive sdmcArchive = 0;
     if(R_SUCCEEDED(res = FSUSER_OpenArchive(&sdmcArchive, ARCHIVE_SDMC, fsMakePath(PATH_EMPTY, "")))) {
         if(R_SUCCEEDED(res = util_ensure_dir(sdmcArchive, "/fbi/")) && R_SUCCEEDED(res = util_ensure_dir(sdmcArchive, "/fbi/save/"))) {
+            char gameName[0x10] = {'\0'};
+            util_escape_file_name(gameName, exportData->title->productCode, sizeof(gameName));
+
             char path[FILE_PATH_MAX];
-            snprintf(path, sizeof(path), "/fbi/save/%s.sav", exportData->title->productCode);
+            snprintf(path, sizeof(path), "/fbi/save/%s.sav", gameName);
 
             FS_Path* fsPath = util_make_path_utf8(path);
             if(fsPath != NULL) {

source/ui/section/action/importtwlsave.c

@@ -39,8 +39,11 @@ static Result action_import_twl_save_open_src(void* data, u32 index, u32* handle
 
     Result res = 0;
 
+    char gameName[0x10] = {'\0'};
+    util_escape_file_name(gameName, importData->title->productCode, sizeof(gameName));
+
     char path[FILE_PATH_MAX];
-    snprintf(path, sizeof(path), "/fbi/save/%s.sav", importData->title->productCode);
+    snprintf(path, sizeof(path), "/fbi/save/%s.sav", gameName);
 
     FS_Path* fsPath = util_make_path_utf8(path);
     if(fsPath != NULL) {