Kernel: Add tty to process and make termios modifiable

kernel/kernel/Process.cpp

@@ -18,15 +18,10 @@ namespace Kernel
 		return process;
 	}
 
-	BAN::ErrorOr<void> Process::init_stdio()
-	{
-		if (!m_open_files.empty())
-			return BAN::Error::from_c_string("Could not init stdio, process already has open files");
-		TRY(open("/dev/tty1", O_RDONLY)); // stdin
-		TRY(open("/dev/tty1", O_WRONLY)); // stdout
-		TRY(open("/dev/tty1", O_WRONLY)); // stderr
-		return {};
-	}
+	Process::Process(pid_t pid)
+		: m_pid(pid)
+		, m_tty(TTY::current())
+	{ }
 
 	BAN::ErrorOr<void> Process::add_thread(entry_t entry, void* data)
 	{
@@ -51,6 +46,24 @@ namespace Kernel
 				m_threads.remove(i);
 	}
 
+	BAN::ErrorOr<void> Process::init_stdio()
+	{
+		if (!m_open_files.empty())
+			return BAN::Error::from_c_string("Could not init stdio, process already has open files");
+		TRY(open("/dev/tty1", O_RDONLY)); // stdin
+		TRY(open("/dev/tty1", O_WRONLY)); // stdout
+		TRY(open("/dev/tty1", O_WRONLY)); // stderr
+		return {};
+	}
+
+	BAN::ErrorOr<void> Process::set_termios(const termios& termios)
+	{
+		if (m_tty == nullptr)
+			return BAN::Error::from_errno(ENOTTY);
+		m_tty->set_termios(termios);
+		return {};
+	}
+
 	BAN::ErrorOr<int> Process::open(BAN::StringView path, int flags)
 	{
 		if (flags & ~O_RDWR)

kernel/kernel/Terminal/TTY.cpp

@@ -59,6 +59,11 @@ namespace Kernel
 		);
 	}
 
+	TTY* TTY::current()
+	{
+		return s_tty;
+	}
+
 	void TTY::on_key(Input::KeyEvent event)
 	{
 		ASSERT(!m_lock.is_locked());