42_minishell/main.c

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

void	ft_lstdel(void *ptr)
{
	t_cmd	*content;

	content = (t_cmd *) ptr;
	if (content->executable != NULL)
		free(content->executable);
	if (content->args != NULL)
		ft_freer_tab_ultimate(1, content->args);
	free(content);
}

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_lstdel);
			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_lstdel);
		current = current->next;
		i++;
	}
	return (0);
}

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);
}

void	ft_strshift(char *str, int shift)
{
	size_t	i;

	if (shift > 0)
		return ;
	i = 0;
	while (str[i - shift] != '\0')
	{
		str[i] = str[i - shift];
		i++;
	}
	str[i + shift] = '\0';
}

void	ft_quote_remover(char *str)
{
	size_t	i;
	ssize_t	start;
	ssize_t	stop;

	start = -1;
	i = 0;
	while (str[i] != '\0')
	{
		if ((str[i] == '\"' || str[i] == '\''))
		{
			if (start == -1)
				start = i;
			else if (str[i] == str[start])
			{
				stop = i;
				break ;
			}
		}
		i++;
	}
	if (start != -1)
	{
		ft_strshift(str, -1);
		str[stop] = '\0';
	}
}

int	ft_cmd_filler(t_list *element, char **args)
{
	t_cmd	*content;
	size_t	i;

	if (args == NULL)
		return (1);
	content = (t_cmd *)element->content;
	i = 0;
	while (args[i] != NULL)
	{
		ft_quote_remover(args[i]);
		i++;
	}
	content->args = args;
	//TODO check if executable exist
	//TODO change it by env value
	//TODO add switch to bultin
	content->executable = ft_strjoin("/usr/bin/", args[0]);
	if (content->executable == NULL)
		return (1);
	return (0);
}

int	ft_cmds_fill(t_list **cmds, 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) == 1)
		{
			ft_lstclear(cmds, ft_lstdel);
			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)
{
	int		infile;
	int		outfile;
	t_list	**cmds;

	cmds = malloc(sizeof(t_list *));
	outfile = ft_outfile(line);
	infile = ft_infile(line);
	if (ft_syntatic_verif(line) == 1)
		return (NULL);
	if (ft_cmds_prep(cmds, line, infile, outfile) == 1)
		return (NULL);
	if (ft_cmds_fill(cmds, line) == 1)
		return (NULL);
	ft_printf("%s\n", line);
	return (cmds);
}

int	ft_cmds_excutor(t_list **cmds)
{
	t_cmd	*content;
	t_list	*current;
	size_t	i;

	i = 0;
	current = *cmds;
	while (current != NULL)
	{
		content = current->content;
		ft_printf("--- COMMAND %d\n", i);
		ft_printf("excutable: %s\n", content->executable);
		ft_printf("args:\n%S", content->args);
		current = current->next;
		i++;
	}
	return (0);
}

int	main(int ac, char **av)
{
	t_list	**cmds;

	if (ac == 1)
		return (1);
	cmds = ft_parse_cmds(av[1]);
	if (cmds == NULL)
		return (1);
	if (ft_cmds_excutor(cmds) == 1)
	{
		ft_lstclear(cmds, ft_lstdel);
		return (1);
	}
	ft_lstclear(cmds, ft_lstdel);
	free(cmds);
	return (1);
}