mkfifo: error when non-file permission mode set

src/uu/mkfifo/locales/en-US.ftl

@@ -11,3 +11,4 @@ mkfifo-error-invalid-mode = invalid mode: { $error }
 mkfifo-error-missing-operand = missing operand
 mkfifo-error-cannot-create-fifo = cannot create fifo { $path }: File exists
 mkfifo-error-cannot-set-permissions = cannot set permissions on { $path }: { $error }
+mkfifo-error-non-file-permission = mode must specify only file permission bits

src/uu/mkfifo/locales/fr-FR.ftl

@@ -11,3 +11,4 @@ mkfifo-error-invalid-mode = mode invalide : { $error }
 mkfifo-error-missing-operand = opérande manquant
 mkfifo-error-cannot-create-fifo = impossible de créer le fifo { $path } : Le fichier existe
 mkfifo-error-cannot-set-permissions = impossible de définir les permissions sur { $path } : { $error }
+mkfifo-error-non-file-permission = le mode ne doit spécifier que des bits de permission de fichier

src/uu/mkfifo/src/mkfifo.rs

@@ -28,6 +28,15 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
     let mode = calculate_mode(matches.get_one::<String>(options::MODE))
         .map_err(|e| USimpleError::new(1, translate!("mkfifo-error-invalid-mode", "error" => e)))?;
 
+    // Check if mode contains special bits
+    let non_file_permission_bits = 0o7000; // setuid, setgid, sticky bits
+    if mode & non_file_permission_bits != 0 {
+        return Err(USimpleError::new(
+            1,
+            translate!("mkfifo-error-non-file-permission"),
+        ));
+    }
+
     let fifos: Vec<String> = match matches.get_many::<String>(options::FIFO) {
         Some(v) => v.cloned().collect(),
         None => {

tests/by-util/test_mkfifo.rs

@@ -43,6 +43,22 @@ fn test_create_one_fifo_with_invalid_mode() {
         .stderr_contains("invalid mode");
 }
 
+#[test]
+fn test_create_one_fifo_with_non_file_permission_mode() {
+    new_ucmd!()
+        .arg("abcd")
+        .arg("-m")
+        .arg("1777")
+        .fails()
+        .stderr_is("mkfifo: mode must specify only file permission bits\n");
+    new_ucmd!()
+        .arg("abcd")
+        .arg("-m")
+        .arg("1999")
+        .fails()
+        .stderr_contains("invalid mode");
+}
+
 #[test]
 fn test_create_multiple_fifos() {
     new_ucmd!()