Correct chmod -R on dangling symlink and tests

Author: Clifford Ressel

src/uu/chmod/src/chmod.rs

@@ -259,7 +259,11 @@ impl Chmoder {
                         // Don't try to change the mode of the symlink itself
                         continue;
                     }
-                    if !self.quiet {
+                    if self.recursive {
+                        // With recursive, we should ignore dangling symlinks
+                        continue;
+                    }
+                    if !self.recursive && !self.quiet {
                         show!(USimpleError::new(
                             1,
                             format!("cannot operate on dangling symlink {}", filename.quote()),

tests/by-util/test_chmod.rs

@@ -892,8 +892,9 @@ fn test_chmod_symlink_to_dangling_recursive() {
         .arg("755")
         .arg("-R")
         .arg(symlink)
-        .fails()
-        .stderr_is("chmod: cannot operate on dangling symlink 'symlink'\n");
+        .succeeds()
+        .stdout_is("")
+        .stderr_is("");
     assert_eq!(
         at.symlink_metadata(symlink).permissions().mode(),
         get_expected_symlink_permissions(),