From f3b1c84a29e272cc589c300bca5020ccd4685a02 Mon Sep 17 00:00:00 2001
From: Felix Morgner <felix.morgner@gmail.com>
Date: Mon, 26 Oct 2026 20:02:16 +0100
Subject: terminal: fix signal handling state restore

---
 ttwhy/terminal/scoped_attributes.cppm | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

(limited to 'ttwhy/terminal/scoped_attributes.cppm')

diff --git a/ttwhy/terminal/scoped_attributes.cppm b/ttwhy/terminal/scoped_attributes.cppm
index 56fbe58..2d82826 100644
--- a/ttwhy/terminal/scoped_attributes.cppm
+++ b/ttwhy/terminal/scoped_attributes.cppm
@@ -150,9 +150,38 @@ namespace ttwhy::terminal
       return std::move(*this);
     }
 
+    //! Capture the currently active terminal mode and mark the attributes as suspended.
+    //!
+    //! Must be called before the terminal mode is changed while the process is being stopped.
+    auto suspend() & -> scoped_attributes &
+    {
+      if (m_file_descriptor > 0)
+      {
+        m_suspended = true;
+        m_suspended_canonical = canonical_mode();
+        m_suspended_echo = echo();
+      }
+      return *this;
+    }
+
+    //! Restore the terminal mode captured before suspension.
+    auto resume() & -> scoped_attributes &
+    {
+      if (m_suspended)
+      {
+        canonical_mode(m_suspended_canonical);
+        echo(m_suspended_echo);
+        m_suspended = false;
+      }
+      return *this;
+    }
+
   private:
     int m_file_descriptor;
     termios m_attributes;
+    bool m_suspended{false};
+    bool m_suspended_canonical{false};
+    bool m_suspended_echo{false};
   };
 
 }  // namespace ttwhy::terminal
-- 
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