42_minishell/cmds.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   cmds.c                                             :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: cchauvet <cchauvet@student.42angoulem      +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2023/02/15 14:17:26 by cchauvet          #+#    #+#             */
/*   Updated: 2023/02/17 15:20:29 by cchauvet         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libftx/libftx.h"
#include "minishell.h"

static int	ft_cmds_init(t_list **cmds, size_t len)
{
	t_cmd	*content;
	t_list	*current;
	size_t	i;

	*cmds = malloc(sizeof(t_list));
	current = *cmds;
	i = 0;
	while (i < len)
	{
		content = malloc(sizeof(t_cmd));
		if (content == NULL)
		{
			ft_lstclear(cmds, ft_cmddel);
			return (1);
		}
		content->args = NULL;
		content->executable = NULL;
		content->fd_in = -1;
		content->fd_out = -1;
		current->content = content;
		if (!((i + 1) < len))
		{
			current->next = NULL;
			return (0);
		}
		current->next = malloc(sizeof(t_list));
		if (current->next == NULL)
			ft_lstclear(cmds, ft_cmddel);
		current = current->next;
		i++;
	}
	return (0);
}

static int	ft_cmds_prep(t_list **cmds, const char *line, int infile, int outfile)
{
	size_t	len;
	t_cmd	*cmd;
	t_list	*current;

	len = ft_seglen_quoted(line, '|');
	if (len == 0)
		return (0);
	if (ft_cmds_init(cmds, ft_seglen_quoted(line, '|')))
	{
		free(cmds);
		return (1);
	}
	cmd = (t_cmd *)(*cmds)->content;
	cmd->fd_in = infile;
	current = *cmds;
	while (current->next != NULL)
		current = current->next;
	cmd = (t_cmd *) current->content;
	cmd->fd_out = outfile;
	return (0);
}

static int	ft_cmds_fill(t_list **cmds, t_list **env, const char *line)
{
	char	**tab;
	char	**args;
	t_list	*current;
	size_t	i;

	tab = ft_split_quoted(line, '|');
	if (tab == NULL)
		return (1);
	i = 0;
	current = *cmds;
	while (tab[i] != NULL)
	{
		args = ft_split_quoted(tab[i], ' ');
		if (ft_cmd_filler(current, args, env) == 1)
		{
			ft_lstclear(cmds, ft_cmddel);
			ft_freer_tab_ultimate(2, args, tab);
			return (1);
		}
		current = current->next;
		i++;
	}
	ft_freer_tab_ultimate(1, tab);
	return (0);
}

t_list	**ft_parse_cmds(char *line, t_list **env, int infile, int outfile)
{
	t_list	**cmds;

	cmds = malloc(sizeof(t_list *));
	if (ft_cmds_prep(cmds, line, infile, outfile) == 1)
		return (NULL);
	if (ft_cmds_fill(cmds, env, line) == 1)
		return (NULL);
	return (cmds);
}