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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* path.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: cacharle <marvin@42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/02/27 15:51:01 by cacharle #+# #+# */
/* Updated: 2020/09/16 19:28:34 by charles ### ########.fr */
/* */
/* ************************************************************************** */
/*
** \file path.c
** \brief Path search
*/
#include "minishell.h"
static int st_path_check(char exec_path[PATH_MAX + 1], bool in_path)
{
struct stat statbuf;
if (stat(exec_path, &statbuf) == -1)
return (errorf_ret(127, "%s: %s\n", exec_path, strerror(errno)));
if (S_ISDIR(statbuf.st_mode))
return (errorf_ret(126, "%s: Is a directory\n", exec_path));
if (!in_path && !(statbuf.st_mode & 0444))
return (errorf_ret(126, "%s: %s\n", exec_path, strerror(EACCES)));
return (0);
}
static bool st_dir_search(
char *dirname, char *exec_name, char exec_path[PATH_MAX + 1])
{
DIR *dir;
struct dirent *entry;
if ((dir = opendir(dirname)) == NULL)
return (false);
while ((entry = readdir(dir)) != NULL)
{
if (ft_strcmp(entry->d_name, exec_name) == 0)
{
ft_strcpy(exec_path, dirname);
ft_strcat(exec_path, "/");
ft_strcat(exec_path, exec_name);
closedir(dir);
return (true);
}
}
closedir(dir);
return (false);
}
int path_search(
t_env env, char *exec_name, char exec_path[PATH_MAX + 1], bool print)
{
char *current_dir;
char *collon;
char cwd[PATH_MAX + 1];
if (ft_strchr(exec_name, '/') != NULL)
{
ft_strcpy(exec_path, exec_name);
return (st_path_check(exec_path, false));
}
if ((current_dir = env_search(env, "PATH", NULL)) == NULL)
return (st_dir_search(getcwd(cwd, PATH_MAX + 1), exec_name, exec_path));
while ((collon = ft_strchr(current_dir, ':')) != NULL)
{
*collon = '\0';
if (*current_dir == '\0')
current_dir = getcwd(cwd, PATH_MAX + 1);
if (st_dir_search(current_dir, exec_name, exec_path))
{
*collon = ':';
return (st_path_check(exec_path, true));
}
*collon = ':';
current_dir = collon + 1;
}
if (*current_dir == '\0')
current_dir = getcwd(cwd, PATH_MAX + 1);
if (st_dir_search(current_dir, exec_name, exec_path))
return (st_path_check(exec_path, true));
if (print)
errorf("%s: command not found\n", exec_name);
return (127);
}
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