Method get_input

userspace/programs/Shell/Input.cpp:297–682

}

BAN::Optional<BAN::String> Input::get_input(BAN::Optional<BAN::StringView> custom_prompt)
{
	tcsetattr(0, TCSANOW, &s_raw_termios);
	BAN::ScopeGuard _([] { tcsetattr(0, TCSANOW, &s_original_termios); });

	BAN::String ps1_prompt;
	if (!custom_prompt.has_value())
		ps1_prompt = parse_ps1_prompt();

	const auto print_prompt =
		[&]()
		{
			if (custom_prompt.has_value())
				printf("%.*s", (int)custom_prompt->size(), custom_prompt->data());
			else
				printf("%.*s", (int)ps1_prompt.size(), ps1_prompt.data());
		};
	const auto prompt_length =
		[&]() -> int
		{
			if (custom_prompt.has_value())
				return custom_prompt->size();
			return character_length(ps1_prompt);
		};

	print_prompt();
	fflush(stdout);

	while (true)
	{
		int chi = getchar();
		if (chi == EOF)
		{
			if (errno != EINTR)
			{
				perror("getchar");
				exit(1);
			}

			clearerr(stdin);
			m_buffers = s_history;
			MUST(m_buffers.emplace_back(""_sv));
			m_buffer_index = m_buffers.size() - 1;
			m_buffer_col = 0;
			putchar('\n');
			print_prompt();
			fflush(stdout);
			continue;
		}

		uint8_t ch = chi;
		if (ch != '\t')
		{
			m_tab_completions.clear();
			m_tab_index.clear();
		}

		if (m_waiting_utf8 > 0)