Minishell/minishell.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   minishell.c                                        :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: narnaud <narnaud@student.42.fr>            +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2022/05/02 12:14:09 by narnaud           #+#    #+#             */
/*   Updated: 2022/05/05 11:10:24 by narnaud          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

# include "minishell.h"

int	caller(t_datas *datas, t_command *cmd)
{
	pid_t	pid;
	int		pip[2];
	int 	status;

	if (cmd->fd[1] == 0 && cmd->next &&  cmd->next->fd[0] == 0)
	{
		pipe(pip);
		cmd->fd[1] = pip[1];
		cmd->next->fd[0] = pip[0];
	}
	if (!cmd->prev && !cmd->next && command_call(datas, cmd) != -1)
		return (1);
	pid = fork();
	if (!pid)
	{	
		if (cmd->fd[0])
			dup2(cmd->fd[0], STDIN_FILENO);
		if (cmd->fd[1])
			dup2(cmd->fd[1], STDOUT_FILENO);
		if (command_call(datas, cmd) == -1)	
			exe(datas, cmd);
		exit(EXIT_SUCCESS);
	}
	if (cmd->fd[1])
		close(cmd->fd[1]);
	if (cmd->next)
		return (caller(datas, cmd->next));
	waitpid(pid, &status, 0);
	if (WIFSIGNALED(status))
	{
		datas->exit_code = WTERMSIG(status);
		if (datas->exit_code == 3)
			printf("Quit: 3\n");
		if (datas->exit_code == 9)
			printf("Kill: 15\n");
		if (datas->exit_code == 15)
			printf("Terminated: 15\n");
	}
	if (cmd->fd[0])
		close(cmd->fd[0]);
	return (1);
}

t_command	*parser(t_token *tok, t_command *prev)
{
	int 		i;
	t_command	*cmd;

	if (!tok)
		return (NULL);
	cmd = ft_calloc(1, sizeof(t_command));
	if (prev)
		cmd->prev = prev;
	i = 0;
	cmd->argv = ft_calloc(count_arguments(tok) + 1, sizeof(char *));
	while(tok && tok->type != PIPE)
	{
		if (tok->type)
			update_redir(cmd, tok);
		else
			cmd->argv[i++] = tok->value;
		tok = tok->next;
	}
	if (DEBUG)
		printf("######\n->cmd : %s, in_fd : %d, out_fd : %d\n", \
				cmd->argv[0],  cmd->fd[0], cmd->fd[1]);
	cmd->argv[i] = NULL;
	if (tok && tok->type == PIPE)
		cmd->next = parser(tok->next, cmd);
	return(cmd);
}

t_token	*lexer(char *line)
{
	t_lexer	*lex;
	char	*tmp;
	int		tmp_i;

	lex = ft_calloc(1, sizeof *lex);
	lex->state = ROOT_ST;
	tmp = ft_calloc(1024, sizeof *tmp);
	tmp_i = 0;
	while (*line)
	{
		if (check_state(lex, &line))
			continue;
		if (lex->state != S_QUOTE_ST && *line == '$')
			tmp_i = replace_var(&line, tmp, tmp_i);
		if (check_register(lex, &line, tmp))
		{
			tmp_i = 0;
			ft_bzero(tmp, 1024);
			continue ;
		}
		tmp[tmp_i] = *line;
		line++;
		tmp_i++;
	}
	create_token(lex, tmp);
	return (lex->tokens);
}

int	main(int argc, char **argv, char **envp)
{
	t_datas	datas;
	char	*line;

	datas.envp = envp;
	datas.exit_code = 0;
	if (argc < 2)
		(void)argv;
	while (1)
	{
		termios(0);
		line = readline("$ ");
		termios(1);
		if (line == NULL)
			halt(EXIT_FAILURE);
		if (is_empty(line))
			continue ;
		caller(&datas, parser(lexer(line), NULL));
		add_history(line);
	}
	clear_history();
	return (EXIT_SUCCESS);
}