shell.h

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   shell.h                                            :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: pchung <pchung@student.42.fr>              +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2025/03/09 03:36:43 by pchung            #+#    #+#             */
/*   Updated: 2025/03/09 03:58:39 by pchung           ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#ifndef SHELL_H
# define SHELL_H

# include "libft/libft.h"
# include <dirent.h>
# include <errno.h>
# include <fcntl.h>
# include <glob.h>
# include <readline/history.h>
# include <readline/readline.h>
# include <signal.h>
# include <stdbool.h>
# include <stdio.h>
# include <stdlib.h>
# include <string.h>
# include <sys/wait.h>
# include <term.h>
# include <termios.h>
# include <unistd.h>

# define HISTORY_SIZE 10
# define NOTSIG 1
# define RSTSIG 0
# define SHELL_BUF_SIZE 8192
# define SIGINT_ 42

extern volatile sig_atomic_t	g_signal_received;

typedef struct s_ast
{
	t_list						*command_groups;
}								t_ast;

typedef struct s_command_group
{
	t_list						*cmds;
	int							cmd_amount;
	int							**pipes;
	t_list						*pids;
	int							return_value;
}								t_command_group;

typedef struct s_cmd
{
	t_list						*tokens;
	t_list						*redirs;
}								t_cmd;

typedef struct s_redir
{
	char						*direction;
	char						type[2];
}								t_redir;

typedef struct s_env
{
	char						*key;
	char						*value;
	struct s_env				*next;
}								t_env;

typedef struct s_token
{
	char						*value;
	int							is_single_quoted;
}								t_token;

t_ast							*get_ast(const char *input, t_env *env_list,
									int *exit_status);
t_env							*init_env_list(char **environ);

// Utility Functions
void							run_shell(t_env *env_list, char **envp);
char							*get_env_value(t_env *env_list,
									const char *key);
void							set_env_value(t_env **env_list, const char *key,
									const char *value);
void							unset_env_value(t_env **env_list,
									const char *key);
void							free_env_list(t_env **env_list);
int								exec_ast(t_ast *ast, t_env *env_list,
									char **envp);
char							**convert_env_list_to_array(t_env *env_list);
void							free_env_array(char **envp);
;
void							shell_unknown_command(char *cmd);
int								is_parent_builtin(t_cmd *cmd);

// FREE FUNCTIONS
void							free_ast(t_ast *ast);
void							free_cmd(t_cmd *cmd);
void							free_command_group(
									t_command_group *command_group);
void							free_redir(void *ptr);
void							free_argv(char **argv);
void							free_paths(char **paths);
void							free_tokens(char **tokens);

// BUILD-IN FUNCTIONS
int								shell_env(t_env *env_list);
int								shell_export(char **args, t_env *env_list);
int								shell_unset(char **args, t_env *env_list);
int								shell_clear(void);
int								shell_cd(char **argv, t_env *env_list);
int								shell_pwd(void);
int								shell_echo(char **args);
int								shell_exit(char **argv);

// TERMINAL SETTINGS
void							reset_terminal_settings(
									const struct termios *old_termios);
void							setup_terminal(struct termios *old_termios);
void							term_clear_screen(void);

// TERMCAP FUNCTIONS
void							handle_input(char *buf, size_t *len,
									size_t max_len);

// SINGAL  FUNCTIONS
void							init_readline_for_signal(void);
void							setup_signals(void);
void							handle_sigint(int sig);
void							set_signal(int signum, void (*handler)(int),
									int flags);
void							init_signal(void (*handler_for_sigint)(int),
									void (*handler_for_sigquit)(int));

// PARSER FUNCTIONS
char							**token_list_to_argv(t_cmd *cmd);

#endif