cat: ignore -u flag, just like GNU does

uutils · Mar 1, 2024 · 31e8e3a · 31e8e3a
1 parent 44cd7b4
commit 31e8e3a
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diff --git a/src/uu/cat/src/cat.rs b/src/uu/cat/src/cat.rs
@@ -170,6 +170,7 @@ mod options {
     pub static SHOW_NONPRINTING_TABS: &str = "t";
     pub static SHOW_TABS: &str = "show-tabs";
     pub static SHOW_NONPRINTING: &str = "show-nonprinting";
+    pub static IGNORED_U: &str = "ignored-u";
 }
 
 #[uucore::main]
@@ -302,6 +303,12 @@ pub fn uu_app() -> Command {
                 .help("use ^ and M- notation, except for LF (\\n) and TAB (\\t)")
                 .action(ArgAction::SetTrue),
         )
+        .arg(
+            Arg::new(options::IGNORED_U)
+                .short('u')
+                .help("(ignored)")
+                .action(ArgAction::SetTrue),
+        )
 }
 
 fn cat_handle<R: FdReadable>(

diff --git a/tests/by-util/test_cat.rs b/tests/by-util/test_cat.rs
@@ -612,3 +612,14 @@ fn test_error_loop() {
         .fails()
         .stderr_is("cat: 1: Too many levels of symbolic links\n");
 }
+
+#[test]
+fn test_u_ignored() {
+    for same_param in ["-u", "-uu"] {
+        new_ucmd!()
+            .arg(same_param)
+            .pipe_in("hello")
+            .succeeds()
+            .stdout_only("hello");
+    }
+}