stty: add support for tabs/-tabs combination settings

Author: sylvestre

src/uu/stty/src/flags.rs

@@ -355,4 +355,5 @@ pub const COMBINATION_SETTINGS: &[(&str, bool)] = &[
     ("pass8", true),
     ("raw", true),
     ("sane", false),
+    ("tabs", true),
 ];

src/uu/stty/src/stty.rs

@@ -1220,6 +1220,12 @@ fn combo_to_flags(combo: &str) -> Vec<ArgOptions<'_>> {
                 (S::VDISCARD, "^O"),
             ];
         }
+        "tabs" => {
+            flags = vec!["tab0"];
+        }
+        "-tabs" => {
+            flags = vec!["tab3"];
+        }
         _ => unreachable!("invalid combination setting: must have been caught earlier"),
     }
     let mut flags = flags

tests/by-util/test_stty.rs

@@ -947,6 +947,23 @@ fn test_combo_crt() {
         .stdout_contains("echoe");
 }
 
+#[test]
+#[cfg(target_os = "linux")]
+fn test_combo_tabs() {
+    // Test tabs combination setting - tabs is an alias for tab0, -tabs for tab3
+    new_ucmd!()
+        .terminal_simulation(true)
+        .args(&["tabs"])
+        .succeeds()
+        .no_stderr();
+
+    new_ucmd!()
+        .terminal_simulation(true)
+        .args(&["-tabs"])
+        .succeeds()
+        .no_stderr();
+}
+
 #[test]
 #[cfg(unix)]
 #[ignore = "Fails because cargo test does not run in a tty"]