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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* path.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: cacharle <marvin@42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/02/27 15:51:01 by cacharle #+# #+# */
/* Updated: 2020/09/09 15:49:50 by charles ### ########.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 8192
/*
** \brief Update `path` with all files
** in the directory named `dirname`.
** \param path Path hash table
** \param dirname directory name
** \return -1 on error, 0 or -2 otherwise
*/
static int st_add_directory(t_path path, char *dirname)
{
DIR *dir;
struct dirent *entry;
if ((dir = opendir(dirname)) == NULL)
return (-2);
while ((entry = readdir(dir)) != NULL)
{
if (ft_htset_safe(path, entry->d_name,
ft_strjoin3(dirname, "/", entry->d_name), free) == NULL)
{
closedir(dir);
return (-1);
}
}
if (closedir(dir) == -1)
return (-1);
return (0);
}
/*
** \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
*/
// TODO check nullstring path == current directory
// i.e ./ not needed before executable
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_add_directory(path, dirs[i]) == -1)
return (ft_split_destroy(dirs));
ft_split_destroy(dirs);
return (path);
}
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