From c4c227e36762edd16d58439816e21c2eabd84da7 Mon Sep 17 00:00:00 2001
From: zhuzhuzhu <945386260@qq.com>
Date: Sun, 25 Aug 2024 22:56:03 +0800
Subject: [PATCH] =?UTF-8?q?=E3=80=90=E4=BF=AE=E5=A4=8D=E3=80=91=E4=BF=AE?=
 =?UTF-8?q?=E5=A4=8Dsymlink=E7=B3=BB=E7=BB=9F=E8=B0=83=E7=94=A8=E8=BF=94?=
 =?UTF-8?q?=E5=9B=9E=E5=80=BC=E4=B8=8D=E6=98=AF=E9=A2=84=E6=9C=9F=E9=97=AE?=
 =?UTF-8?q?=E9=A2=98?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 components/dfs/dfs_v2/src/dfs_file.c |  4 ++++
 components/lwp/lwp_syscall.c         | 17 ++++++++++-------
 2 files changed, 14 insertions(+), 7 deletions(-)

diff --git a/components/dfs/dfs_v2/src/dfs_file.c b/components/dfs/dfs_v2/src/dfs_file.c
index 53e110ef59..1f98d5ceab 100644
--- a/components/dfs/dfs_v2/src/dfs_file.c
+++ b/components/dfs/dfs_v2/src/dfs_file.c
@@ -1567,6 +1567,10 @@ int dfs_file_symlink(const char *target, const char *linkpath)
                 rt_free(parent);
             }
         }
+        else
+        {
+            rt_set_errno(-EPERM);
+        }
 
         if (fullpath != linkpath)
             rt_free(fullpath);
diff --git a/components/lwp/lwp_syscall.c b/components/lwp/lwp_syscall.c
index bbb0573c5c..077f6d86af 100644
--- a/components/lwp/lwp_syscall.c
+++ b/components/lwp/lwp_syscall.c
@@ -5909,28 +5909,31 @@ sysret_t sys_link(const char *existing, const char *new)
 sysret_t sys_symlink(const char *existing, const char *new)
 {
     int ret = -1;
-
+    int err = 0 ;
 #ifdef ARCH_MM_MMU
-    int err;
 
-    err = lwp_user_strlen(existing);
-    if (err <= 0)
+    ret = lwp_user_strlen(existing);
+    if (ret <= 0)
     {
         return -EFAULT;
     }
 
-    err = lwp_user_strlen(new);
-    if (err <= 0)
+    ret = lwp_user_strlen(new);
+    if (ret <= 0)
     {
         return -EFAULT;
     }
 #endif
 #ifdef RT_USING_DFS_V2
     ret = dfs_file_symlink(existing, new);
+    if(ret < 0)
+    {
+        err = GET_ERRNO();
+    }
 #else
     SET_ERRNO(EFAULT);
 #endif
-    return (ret < 0 ? GET_ERRNO() : ret);
+    return (err < 0 ? err : ret);
 }
 
 sysret_t sys_eventfd2(unsigned int count, int flags)