From 1d3bf06db82a869f57f7552be5a356d2d191b53e Mon Sep 17 00:00:00 2001
From: Max Wash <mbswash@gmail.com>
Date: Mon, 23 Jun 2025 13:42:55 +0100
Subject: [PATCH] wrap: prevent add_file from writing empty clusters

---
 src/wrap.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/wrap.c b/src/wrap.c
index 66f1e22..a082a18 100644
--- a/src/wrap.c
+++ b/src/wrap.c
@@ -66,6 +66,10 @@ static enum ec3_status add_file(
 
 	while (1) {
 		size_t r = fread(buf, 1, cluster_size, inp);
+		if (r == 0) {
+			break;
+		}
+
 		size_t w;
 		status = ec3_tag_ioctx_write_cluster(tag, i++, buf, r, &w);