From 05cc6fb610de679d78079f38037e131103ca2db8 Mon Sep 17 00:00:00 2001
From: liuhaitao <liuhaitao@xiaomi.com>
Date: Fri, 31 Dec 2021 17:48:00 +0800
Subject: [PATCH] fs/fcntl: add O_APPEND flag judge in fcntl

Signed-off-by: liuhaitao <liuhaitao@xiaomi.com>
---
 fs/vfs/fs_fcntl.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/fs/vfs/fs_fcntl.c b/fs/vfs/fs_fcntl.c
index 1f6f425eed..f796fa5b23 100644
--- a/fs/vfs/fs_fcntl.c
+++ b/fs/vfs/fs_fcntl.c
@@ -150,6 +150,11 @@ static int file_vfcntl(FAR struct file *filep, int cmd, va_list ap)
               oflags          &=  (FFCNTL & ~O_NONBLOCK);
               filep->f_oflags &= ~(FFCNTL & ~O_NONBLOCK);
               filep->f_oflags |=  oflags;
+
+              if (filep->f_oflags & O_APPEND)
+                {
+                  file_seek(filep, 0, SEEK_END);
+                }
             }
         }
         break;