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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* path.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: cacharle <marvin@42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/02/27 15:51:01 by cacharle #+# #+# */
/* Updated: 2020/02/28 12:33:31 by cacharle ### ########.fr */
/* */
/* ************************************************************************** */
/**
** \file path.c
** \brief Path hash table manipulation
*/
#include "minishell.h"
/**
** \brief Number of buckets of a path hash table
*/
#define MS_PATH_HT_SIZE 4096
/**
** \brief Update `path` with all files in the directory named `dirname`.
** \param path Path hash table
** \param dirname directory name
** \return Same path or NULL on error
*/
static t_path st_path_dir_update(t_path path, char *dirname)
{
DIR *dir;
struct dirent *entry;
char *tmp;
if ((dir = opendir(dirname)) == NULL)
return (NULL);
while ((entry = readdir(dir)) != NULL)
{
if ((tmp = ft_strjoin3(dirname, "/", entry->d_name)) == NULL)
return (NULL);
if (ft_htset(path, entry->d_name, tmp, ht_del_str_entry) == NULL)
return (NULL);
}
if (closedir(dir) == -1)
return (NULL);
return (path);
}
/**
** \brief Update the path
** \param path Path hash table or NULL to create a new one
** \param path_var PATH environment variable where each directory is separated by a ':'
** \return The updated/created path hash table or NULL on error
*/
t_path path_update(t_path path, char *path_var)
{
int i;
char **dirs;
if (path_var == NULL)
return (NULL);
if (path == NULL && (path = ft_htnew(MS_PATH_HT_SIZE)) == NULL)
return (NULL);
if ((dirs = ft_split(path_var, ':')) == NULL)
return (NULL);
i = -1;
while (dirs[++i] != NULL)
if (st_path_dir_update(path, dirs[i]) == NULL)
return (ft_split_destroy(dirs));
ft_split_destroy(dirs);
return (path);
}
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