From 20f757ef140a8466e888e6f395461a3ea73daf41 Mon Sep 17 00:00:00 2001
From: Joshua Rogers <MegaManSec@users.noreply.github.com>
Date: Thu, 18 Sep 2025 06:45:12 +0500
Subject: [PATCH] tool_cb_hdr: fix fwrite check in header callback

Compare fwrite result to nmemb (items), not cb (bytes).

Closes #18593
---
 src/tool_cb_hdr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/tool_cb_hdr.c b/src/tool_cb_hdr.c
index 6af9d1947e..3bb3c12dc8 100644
--- a/src/tool_cb_hdr.c
+++ b/src/tool_cb_hdr.c
@@ -116,7 +116,7 @@ size_t tool_header_cb(char *ptr, size_t size, size_t nmemb, void *userdata)
 
   if(per->config->headerfile && heads->stream) {
     size_t rc = fwrite(ptr, size, nmemb, heads->stream);
-    if(rc != cb)
+    if(rc != nmemb)
       return rc;
     /* flush the stream to send off what we got earlier */
     if(fflush(heads->stream)) {
-- 
2.47.3