From 304ea2a64947bf1e3ce77c7900548b60d4581587 Mon Sep 17 00:00:00 2001
From: "Sergio R. Caprile" <scaprile@cesanta.com>
Date: Thu, 13 Aug 2026 18:23:09 -0300
Subject: [PATCH] unbreak fatfs

---
 mongoose.c   | 4 ++--
 src/fs_fat.c | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/mongoose.c b/mongoose.c
index edd51ca3..e68ff3b9 100644
--- a/mongoose.c
+++ b/mongoose.c
@@ -3122,9 +3122,9 @@ static void *ff_open(const char *path, int flags) {
   if (flags & MG_FS_WRITE) {
     mode |= FA_WRITE;
     if (flags & MG_FS_EXCL) {
-      mode |= FA_OPEN_ALWAYS | FA_OPEN_APPEND;
-    } else {
       mode |= FA_CREATE_NEW;
+    } else {
+      mode |= FA_OPEN_ALWAYS | FA_OPEN_APPEND;
     }
   }
   if ((fp = mg_calloc(1, sizeof(*fp))) != NULL &&
diff --git a/src/fs_fat.c b/src/fs_fat.c
index 489c41bf..376d2999 100644
--- a/src/fs_fat.c
+++ b/src/fs_fat.c
@@ -50,9 +50,9 @@ static void *ff_open(const char *path, int flags) {
   if (flags & MG_FS_WRITE) {
     mode |= FA_WRITE;
     if (flags & MG_FS_EXCL) {
-      mode |= FA_OPEN_ALWAYS | FA_OPEN_APPEND;
-    } else {
       mode |= FA_CREATE_NEW;
+    } else {
+      mode |= FA_OPEN_ALWAYS | FA_OPEN_APPEND;
     }
   }
   if ((fp = mg_calloc(1, sizeof(*fp))) != NULL &&