refactor(rm): Use DirFd for recursive child dir removal in Linux

- Add DirFd opening for child directories before recursive calls in safe_remove_dir_recursive_impl
- Enhances performance and correctness by leveraging file descriptors in recursive removal欧美

Author: mattsu2020

src/uu/rm/src/platform/linux.rs

@@ -358,7 +358,16 @@ pub fn safe_remove_dir_recursive_impl(
                 continue;
             }
 
-            let child_error = safe_remove_dir_recursive_impl(&entry_path, options, progress_bar);
+            let child_dir_fd = match DirFd::open(&entry_path) {
+                Ok(fd) => fd,
+                Err(e) => {
+                    error = handle_error_with_force(e, &entry_path, options) || error;
+                    continue;
+                }
+            };
+
+            let child_error =
+                safe_remove_dir_recursive_impl(&entry_path, child_dir_fd, options, progress_bar);
             error = error || child_error;
 
             if !child_error