From 4be9e7679d1127b7f0e945d8c695b248dc9ef53b Mon Sep 17 00:00:00 2001
From: Will Shuttleworth <willshuttle21@gmail.com>
Date: Mon, 9 Jun 2025 17:35:06 -0400
Subject: [PATCH] stty: fix negated options getting rejected by clap

---
 src/uu/stty/src/stty.rs    |  1 +
 tests/by-util/test_stty.rs | 15 ++++++++++++++-
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/src/uu/stty/src/stty.rs b/src/uu/stty/src/stty.rs
index 6fb06acb8..c58408732 100644
--- a/src/uu/stty/src/stty.rs
+++ b/src/uu/stty/src/stty.rs
@@ -646,6 +646,7 @@ pub fn uu_app() -> Command {
         .arg(
             Arg::new(options::SETTINGS)
                 .action(ArgAction::Append)
+                .allow_hyphen_values(true)
                 .help("settings to change"),
         )
 }
diff --git a/tests/by-util/test_stty.rs b/tests/by-util/test_stty.rs
index e9e455e32..00a6a803a 100644
--- a/tests/by-util/test_stty.rs
+++ b/tests/by-util/test_stty.rs
@@ -2,7 +2,7 @@
 //
 // For the full copyright and license information, please view the LICENSE
 // file that was distributed with this source code.
-// spell-checker:ignore parenb parmrk ixany iuclc onlcr ofdel icanon noflsh
+// spell-checker:ignore parenb parmrk ixany iuclc onlcr ofdel icanon noflsh econl igpar
 
 use uutests::new_ucmd;
 use uutests::util::TestScenario;
@@ -97,3 +97,16 @@ fn invalid_mapping() {
         .fails()
         .stderr_contains("invalid integer argument: '0400': Value too large for defined data type");
 }
+
+#[test]
+fn invalid_setting() {
+    new_ucmd!()
+        .args(&["-econl"])
+        .fails()
+        .stderr_contains("invalid argument '-econl'");
+
+    new_ucmd!()
+        .args(&["igpar"])
+        .fails()
+        .stderr_contains("invalid argument 'igpar'");
+}