From 71474bc6829b3cd831df7ce24ea059557996524d Mon Sep 17 00:00:00 2001
From: LoGin <longjin@DragonOS.org>
Date: Sat, 16 Sep 2023 16:16:43 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E5=A4=8Ddrop=20fd=E6=97=B6=EF=BC=8C?=
 =?UTF-8?q?=E6=96=87=E4=BB=B6=E6=8F=8F=E8=BF=B0=E7=AC=A6=E5=BC=95=E7=94=A8?=
 =?UTF-8?q?=E4=B8=8D=E4=B8=BA0=E7=9A=84=E9=97=AE=E9=A2=98=20(#382)?=
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---
 kernel/src/filesystem/vfs/file.rs | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/kernel/src/filesystem/vfs/file.rs b/kernel/src/filesystem/vfs/file.rs
index c9fd07ce..c0d8ef27 100644
--- a/kernel/src/filesystem/vfs/file.rs
+++ b/kernel/src/filesystem/vfs/file.rs
@@ -503,11 +503,7 @@ impl FileDescriptorVec {
             return Err(SystemError::EBADF);
         }
 
-        let f = self.get_file_by_fd(fd);
-        if f.is_none() {
-            // 如果文件描述符不存在，报错
-            return Err(SystemError::EBADF);
-        }
+        self.get_file_by_fd(fd).ok_or(SystemError::EBADF)?;
 
         // 把文件描述符数组对应位置设置为空
         let file = self.fds[fd as usize].take().unwrap();