From 4bb6a5d50f11356bc5b83fba64a7db5aeeca3ee5 Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Wed, 12 Nov 2025 09:30:37 +0100
Subject: [PATCH] tool_operate: use curlx_str_number intead of atoi

For consistency. This instance is for debug-only code and is not
important.

Closes #19480
---
 src/tool_operate.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/tool_operate.c b/src/tool_operate.c
index e1f61a2ba5..401abe12f9 100644
--- a/src/tool_operate.c
+++ b/src/tool_operate.c
@@ -310,10 +310,11 @@ static CURLcode pre_transfer(struct per_transfer *per)
 #ifdef DEBUGBUILD
     /* allow dedicated test cases to override */
     {
-      char *ev = getenv("CURL_UPLOAD_SIZE");
+      const char *ev = getenv("CURL_UPLOAD_SIZE");
       if(ev) {
-        int sz = atoi(ev);
-        uploadfilesize = (curl_off_t)sz;
+        curl_off_t sz;
+        curlx_str_number(&ev, &sz, CURL_OFF_T_MAX);
+        uploadfilesize = sz;
       }
     }
 #endif