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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* b_cd.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: rbousset <marvin@42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/02/14 17:19:27 by rbousset #+# #+# */
/* Updated: 2020/02/14 17:19:29 by rbousset ### ########lyon.fr */
/* */
/* ************************************************************************** */
#include <libft.h>
#include <stdint.h>
#include <unistd.h>
#include <linux/limits.h>
#include "b_export_next.h"
#include "f_fail.h"
#include "s_destroy.h"
#include "s_struct.h"
#include "u_utils.h"
#include "u_vars.h"
#include "u_vars_next.h"
static void
set_path(char **path,
char *args[],
t_msh *msh)
{
if ((*path = ft_strdup(*args)) == NULL)
{
f_alloc_and_destroy_msh(msh);
}
}
static void
b_set_oldpwd(t_msh *msh)
{
char *pwd;
char *tmp;
char fmt[PATH_MAX];
if ((pwd = u_get_var_value("$PWD", msh)) == NULL)
{
if ((pwd = ft_strdup(msh->cwd)) == NULL)
f_alloc_and_destroy_msh(msh);
}
if ((tmp = u_get_var_value("$OLDPWD", msh)) == NULL)
{
ft_sprintf(fmt, "%s=%s", "OLDPWD", pwd);
b_export_with_equals(fmt, msh);
ft_memdel((void*)pwd);
}
else
{
u_subst_var_value("$OLDPWD", pwd, msh);
ft_memdel((void*)&pwd);
ft_memdel((void*)&tmp);
}
}
static void
b_fill_repath(char repath[],
char *splited[])
{
size_t i;
size_t j;
i = 0;
repath[0] = (splited[0] == NULL) ? '/' : repath[0];
while (splited[i] != NULL)
{
if (ft_strncmp(splited[i], "..", 3) == 0)
{
j = (repath[0] == '\0') ? (0) : (ft_strlen(repath));
while (repath[j] != '/' && j > 0)
j--;
repath[j] = '\0';
}
else if (ft_strncmp(splited[i], ".", 2) == 0)
{
}
else
{
j = (ft_strncmp(repath, "/", 2) == 0) ? (1) : (ft_strlen(repath) + 1);
repath[j - 1] = '/';
ft_strlcpy(repath + j, splited[i], ft_strlen(splited[i]) + 1);
}
i++;
}
}
static void
b_upgrade_pwd(const char path[], t_msh *msh)
{
char **splited;
char repath[262144];
char fmt[262144];
b_set_oldpwd(msh);
splited = NULL;
repath[0] = '\0';
if (path[0] != '/')
ft_memcpy(repath, msh->cwd, (ft_strlen(msh->cwd) + 1) * sizeof(char));
if (path[0] == '/' && path[1] == '\0')
ft_memcpy(repath, "/", 2 * sizeof(char));
else if ((splited = ft_split(path, '/')) == NULL)
f_alloc_and_destroy_msh(msh);
if (splited != NULL)
{
b_fill_repath(repath, splited);
ft_delwords(splited);
}
repath[0] = (repath[0] == '\0') ? '/' : repath[0];
ft_sprintf(fmt, "%s=%s", "PWD", repath);
b_export_with_equals(fmt, msh);
ft_memdel((void*)&msh->cwd);
if ((msh->cwd = ft_strdup(repath)) == NULL)
f_alloc_and_destroy_msh(msh);
}
uint8_t
b_cd(char *args[],
t_msh *msh)
{
const uint64_t argc = u_builtins_get_argc((const char**)args);
char *path;
if (argc >= 2)
{
f_fail_too_many_args("cd", msh);
return (1);
}
else if (argc == 0)
{
if ((path = u_get_var_value("$HOME", msh)) == NULL)
{
ft_dprintf(STDERR_FILENO, "minishell: cd: %s\n",
FT_FAIL_HOME_NOT_SET);
return (2);
}
}
else
set_path(&path, args, msh);
if (chdir(path) != 0)
{
f_fail_chd("cd", path, msh);
ft_memdel((void*)&path);
return (1);
}
b_upgrade_pwd(path, msh);
ft_memdel((void*)&path);
return (0);
}
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