Initial Commit

source/backup.c

@@ -0,0 +1,103 @@
+/*
+ * OmniNX Installer - Backup and Restore Operations
+ */
+
+#include "backup.h"
+#include "fs.h"
+#include <libs/fatfs/ff.h>
+#include <string.h>
+#include <utils/sprintf.h>
+
+// Check if file/directory exists
+static bool path_exists(const char *path) {
+    FILINFO fno;
+    return (f_stat(path, &fno) == FR_OK);
+}
+
+// Backup user data before clean install
+int backup_user_data(void) {
+    int res;
+    
+    // Create temp backup directory
+    res = f_mkdir(TEMP_BACKUP_PATH);
+    if (res != FR_OK && res != FR_EXIST) {
+        return res;
+    }
+    
+    // Backup DBI if it exists
+    if (path_exists("sd:/switch/DBI")) {
+        res = folder_copy("sd:/switch/DBI", TEMP_BACKUP_PATH);
+        if (res != FR_OK) {
+            return res;
+        }
+    }
+    
+    // Backup Tinfoil if it exists
+    if (path_exists("sd:/switch/tinfoil")) {
+        res = folder_copy("sd:/switch/tinfoil", TEMP_BACKUP_PATH);
+        if (res != FR_OK) {
+            return res;
+        }
+    }
+    
+    // Backup prod.keys if it exists
+    if (path_exists("sd:/switch/prod.keys")) {
+        res = file_copy("sd:/switch/prod.keys", "sd:/temp_backup/prod.keys");
+        if (res != FR_OK) {
+            return res;
+        }
+    }
+    
+    return FR_OK;
+}
+
+// Restore user data after clean install
+int restore_user_data(void) {
+    int res;
+    
+    // Recreate switch directory (should already exist, but be safe)
+    res = f_mkdir("sd:/switch");
+    if (res != FR_OK && res != FR_EXIST) {
+        return res;
+    }
+    
+    // Restore DBI if backup exists
+    if (path_exists("sd:/temp_backup/DBI")) {
+        res = folder_copy("sd:/temp_backup/DBI", "sd:/switch");
+        if (res == FR_OK) {
+            // Delete old DBI .nro files
+            f_unlink("sd:/switch/DBI/DBI_810_EN.nro");
+            f_unlink("sd:/switch/DBI/DBI_810_DE.nro");
+            f_unlink("sd:/switch/DBI/DBI_845_EN.nro");
+            f_unlink("sd:/switch/DBI/DBI_845_DE.nro");
+            f_unlink("sd:/switch/DBI/DBI.nro");
+        }
+    }
+    
+    // Restore Tinfoil if backup exists
+    if (path_exists("sd:/temp_backup/tinfoil")) {
+        res = folder_copy("sd:/temp_backup/tinfoil", "sd:/switch");
+        if (res == FR_OK) {
+            // Delete old tinfoil.nro
+            f_unlink("sd:/switch/tinfoil/tinfoil.nro");
+        }
+    }
+    
+    // Restore prod.keys if backup exists
+    if (path_exists("sd:/temp_backup/prod.keys")) {
+        res = file_copy("sd:/temp_backup/prod.keys", "sd:/switch/prod.keys");
+        if (res != FR_OK) {
+            return res;
+        }
+    }
+    
+    return FR_OK;
+}
+
+// Clean up temporary backup directory
+int cleanup_backup(void) {
+    if (path_exists(TEMP_BACKUP_PATH)) {
+        return folder_delete(TEMP_BACKUP_PATH);
+    }
+    return FR_OK;
+}