From d9fac09f714e89d74403f14078141af941fb7660 Mon Sep 17 00:00:00 2001
From: zhuzhuzhu <945386260@qq.com>
Date: Sun, 25 Aug 2024 22:56:47 +0800
Subject: [PATCH] =?UTF-8?q?=E3=80=90=E4=BF=AE=E5=A4=8D=E3=80=91=20?=
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---
 components/dfs/dfs_v2/src/dfs.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/components/dfs/dfs_v2/src/dfs.c b/components/dfs/dfs_v2/src/dfs.c
index a00367913f..527ba89627 100644
--- a/components/dfs/dfs_v2/src/dfs.c
+++ b/components/dfs/dfs_v2/src/dfs.c
@@ -537,6 +537,7 @@ int dfs_dup(int oldfd, int startfd)
     fdt = dfs_fdtable_get();
     if ((oldfd < 0) || (oldfd >= fdt->maxfd))
     {
+        rt_set_errno(-EBADF);
         goto exit;
     }
     if (!fdt->fds[oldfd])
@@ -668,12 +669,17 @@ sysret_t sys_dup(int oldfd)
 int sys_dup(int oldfd)
 #endif
 {
+    int err = 0;
     int newfd = dfs_dup(oldfd, (dfs_fdtable_get() == &_fdtab) ? DFS_STDIO_OFFSET : 0);
+    if(newfd < 0)
+    {
+        err = rt_get_errno();
+    }
 
 #ifdef RT_USING_SMART
-    return (sysret_t)newfd;
+    return err < 0 ? err : newfd;
 #else
-return newfd;
+    return err < 0 ? err : newfd;
 #endif
 }