interactive_shell.c

#include <stdio.h>
#include <readline/readline.h>
#include <readline/history.h>
#include "minishell.h"

static void	execute_seqcmd(t_parse_ast *cmdline)
{
	t_parse_ast			*seqcmd;

	seqcmd = cmdline->content.command_line->seqcmd_node;
	set_sighandlers_during_execution();
	invoke_sequential_commands(seqcmd);
	if (g_shell.signal_child_received)
	{
		if (g_shell.signal_child_received == SIGQUIT)
			write(STDOUT_FILENO, "Quit (core dumped)", 18);
		write(STDOUT_FILENO, "\n", 1);
		set_status(128 + g_shell.signal_child_received);
	}
	set_shell_sighandlers();
}

static t_parse_ast	*get_cmdline_from_input_str(char *input_str)
{
	t_token				tok;
	t_parse_buffer		buf;
	t_parse_ast			*cmdline;

	init_buffer_with_string(&buf, input_str);
	buf.size++;
	buf.buffer[ft_strlen(input_str)] = '\n';
	lex_init_token(&tok);
	lex_get_token(&buf, &tok);
	cmdline = parse_command_line(&buf, &tok);
	free(tok.text);
	return (cmdline);
}

static bool	is_invalid_input_str(char *input_str)
{
	while (*input_str)
	{
		if (*input_str & 0x80 || (unsigned char)*input_str > ' ')
			return (true);
		input_str++;
	}
	return (false);
}

static void	show_parse_err(char *input_str)
{
	if (is_invalid_input_str(input_str))
	{
		put_err_msg("Parse error.");
		set_status(1);
	}
}

int	interactive_shell(void)
{
	char				*input_str;
	t_parse_ast			*cmdline;

	set_shell_sighandlers();
	input_str = readline(MINISHELL_PROMPT);
	while (input_str)
	{
		if (*input_str)
			add_history(input_str);
		cmdline = get_cmdline_from_input_str(input_str);
		if (!cmdline)
			show_parse_err(input_str);
		else
		{
			execute_seqcmd(cmdline);
			parse_free_all_ast();
		}
		free(input_str);
		input_str = readline(MINISHELL_PROMPT);
	}
	write(1, "exit\n", 5);
	return (0);
}