From fc1aed3292a3752cdf62d262d9d09007737e2356 Mon Sep 17 00:00:00 2001
From: Natalia Portillo <claunia@claunia.com>
Date: Tue, 21 Oct 2025 14:22:14 +0100
Subject: [PATCH] Do not allow resuming for images version older than V2.

---
 src/open.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/open.c b/src/open.c
index 8166792..c757e8e 100644
--- a/src/open.c
+++ b/src/open.c
@@ -198,6 +198,15 @@ AARU_EXPORT void AARU_CALL *aaruf_open(const char *filepath, const bool resume_m
         return NULL;
     }
 
+    if(ctx->header.imageMajorVersion < AARUF_VERSION_V2 && resume_mode)
+    {
+        TRACE("Cannot write to old images");
+        cleanup_open_failure(ctx);
+        errno = AARUF_ERROR_INCOMPATIBLE_VERSION;
+        TRACE("Exiting aaruf_open() = NULL");
+        return NULL;
+    }
+
     // Read new header version
     if(ctx->header.imageMajorVersion >= AARUF_VERSION_V2)
     {