rm: In some cases, remove_dir is doing a better job than remove_dir_all

use it when remove_dir_all failed

GNU compatibility (rm/empty-inacc.sh)

src/uu/rm/src/rm.rs

@@ -330,6 +330,11 @@ fn handle_dir(path: &Path, options: &Options) -> bool {
     if options.recursive && (!is_root || !options.preserve_root) {
         if options.interactive != InteractiveMode::Always && !options.verbose {
             if let Err(e) = fs::remove_dir_all(path) {
+                // GNU compatibility (rm/empty-inacc.sh)
+                // remove_dir_all failed. maybe it is because of the permissions
+                // but if the directory is empty, remove_dir might work.
+                // So, let's try that before failing for real
+                if let Err(_e) = fs::remove_dir(path) {
                     had_err = true;
                     if e.kind() == std::io::ErrorKind::PermissionDenied {
                         // GNU compatibility (rm/fail-eacces.sh)
@@ -340,6 +345,7 @@ fn handle_dir(path: &Path, options: &Options) -> bool {
                         show_error!("cannot remove {}: {}", path.quote(), e);
                     }
                 }
+            }
         } else {
             let mut dirs: VecDeque<DirEntry> = VecDeque::new();
             // The Paths to not descend into. We need to this because WalkDir doesn't have a way, afaik, to not descend into a directory

tests/by-util/test_rm.rs

@@ -647,6 +647,21 @@ fn test_prompt_write_protected_no() {
     assert!(at.file_exists(file_2));
 }
 
+#[cfg(feature = "chmod")]
+#[test]
+fn test_remove_inaccessible_dir() {
+    let scene = TestScenario::new(util_name!());
+    let at = &scene.fixtures;
+    let dir_1 = "test_rm_protected";
+
+    at.mkdir(dir_1);
+
+    scene.ccmd("chmod").arg("0").arg(dir_1).succeeds();
+
+    scene.ucmd().arg("-rf").arg(dir_1).succeeds();
+    assert!(!at.dir_exists(dir_1));
+}
+
 #[test]
 #[cfg(not(windows))]
 fn test_fifo_removal() {