From 85b9b61dd8a44e92ced13505c8faf4882061a1d1 Mon Sep 17 00:00:00 2001
From: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi>
Date: Sat, 8 Jul 2023 01:35:58 +0300
Subject: [PATCH] stty: Finish '--save' support

Argument parsing for this exists, but the option doesn't change output
in any way. Finish the support.

Closes #3862
---
 src/uu/stty/src/stty.rs | 28 +++++++++++++++++++++++-----
 1 file changed, 23 insertions(+), 5 deletions(-)

diff --git a/src/uu/stty/src/stty.rs b/src/uu/stty/src/stty.rs
index e09662471..6b77f175a 100644
--- a/src/uu/stty/src/stty.rs
+++ b/src/uu/stty/src/stty.rs
@@ -244,12 +244,30 @@ fn print_terminal_size(termios: &Termios, opts: &Options) -> nix::Result<()> {
     Ok(())
 }
 
+fn print_in_save_format(termios: &Termios) {
+    print!(
+        "{:x}:{:x}:{:x}:{:x}",
+        termios.input_flags.bits(),
+        termios.output_flags.bits(),
+        termios.control_flags.bits(),
+        termios.local_flags.bits()
+    );
+    for cc in termios.control_chars {
+        print!(":{cc:x}");
+    }
+    println!();
+}
+
 fn print_settings(termios: &Termios, opts: &Options) -> nix::Result<()> {
-    print_terminal_size(termios, opts)?;
-    print_flags(termios, opts, CONTROL_FLAGS);
-    print_flags(termios, opts, INPUT_FLAGS);
-    print_flags(termios, opts, OUTPUT_FLAGS);
-    print_flags(termios, opts, LOCAL_FLAGS);
+    if opts.save {
+        print_in_save_format(termios);
+    } else {
+        print_terminal_size(termios, opts)?;
+        print_flags(termios, opts, CONTROL_FLAGS);
+        print_flags(termios, opts, INPUT_FLAGS);
+        print_flags(termios, opts, OUTPUT_FLAGS);
+        print_flags(termios, opts, LOCAL_FLAGS);
+    }
     Ok(())
 }