cd.c

#include "main.h"

/**
 * cd_dot - to change to the parent dir
 * @commandArg: data rel (environment)
 * Return: none
 */
void cd_dot(param *commandArg)
{
	char current_pwd[PATH_MAX];
	char *dir, *cp_pwd, *cp_strtok_pwd;

	getcwd(current_pwd, sizeof(current_pwd));
	cp_pwd = _strdup(current_pwd);
	set_env("OLDPWD", cp_pwd, commandArg);
	dir = commandArg->args[1];
	if (_strcmp(".", dir) == 0)
	{
		set_env("PWD", cp_pwd, commandArg);
		free(cp_pwd);
		return;
	}
	if (_strcmp("/", cp_pwd) == 0)
	{
		free(cp_pwd);
		return;
	}
	cp_strtok_pwd = cp_pwd;
	rev_string(cp_strtok_pwd);
	cp_strtok_pwd = _strtok(cp_strtok_pwd, "/");
	if (cp_strtok_pwd != NULL)
	{
		cp_strtok_pwd = _strtok(NULL, "\0");

		if (cp_strtok_pwd != NULL)
			rev_string(cp_strtok_pwd);
	}
	if (cp_strtok_pwd != NULL)
	{
		chdir(cp_strtok_pwd);
		set_env("PWD", cp_strtok_pwd, commandArg);
	}
	else
	{
		chdir("/");
		set_env("PWD", "/", commandArg);
	}
	commandArg->status = 0;
	free(cp_pwd);
}

/**
 * cd_to - change to dir given
 * by user
 * @commandArg: data relevant to the dir
 * Return: none
 */
void cd_to(param *commandArg)
{
	char current_pwd[PATH_MAX];
	char *dir, *cp_pwd, *cp_dir;

	getcwd(current_pwd, sizeof(current_pwd));

	dir = commandArg->args[1];
	if (chdir(dir) == -1)
	{
		get_error(commandArg, 2);
		return;
	}

	cp_pwd = _strdup(current_pwd);
	set_env("OLDPWD", cp_pwd, commandArg);

	cp_dir = _strdup(dir);
	set_env("PWD", cp_dir, commandArg);

	free(cp_pwd);
	free(cp_dir);

	commandArg->status = 0;

	chdir(dir);
}

/**
 * cd_previous - change to the prev dir
 * @commandArg: data rel to the environment
 * Return: no returns
 */
void cd_previous(param *commandArg)
{
	char current_pwd[PATH_MAX];
	char *previous_pwd, *p_oldpwd, *cp_pwd, *cp_oldpwd;

	getcwd(current_pwd, sizeof(current_pwd));
	cp_pwd = _strdup(current_pwd);

	p_oldpwd = _getenv("OLDPWD", commandArg->_environ);

	if (p_oldpwd == NULL)
		cp_oldpwd = cp_pwd;
	else
		cp_oldpwd = _strdup(p_oldpwd);

	set_env("OLDPWD", cp_pwd, commandArg);

	if (chdir(cp_oldpwd) == -1)
		set_env("PWD", cp_pwd, commandArg);
	else
		set_env("PWD", cp_oldpwd, commandArg);

	previous_pwd = _getenv("PWD", commandArg->_environ);

	write(STDOUT_FILENO, previous_pwd, _strlen(previous_pwd));
	write(STDOUT_FILENO, "\n", 1);

	free(cp_pwd);
	if (p_oldpwd)
		free(cp_oldpwd);

	commandArg->status = 0;

	chdir(previous_pwd);
}

/**
 * cd_to_home- change to the home_directory
 * @commandArg: data rel to environ
 * Return: none
 */
void cd_to_home(param *commandArg)
{
	char *previous_pwd, *home_directory;
	char current_pwd[PATH_MAX];

	getcwd(current_pwd, sizeof(current_pwd));
	previous_pwd = _strdup(current_pwd);

	home_directory = _getenv("HOME", commandArg->_environ);

	if (home_directory == NULL)
	{
		set_env("OLDPWD", previous_pwd, commandArg);
		free(previous_pwd);
		return;
	}

	if (chdir(home_directory) == -1)
	{
		get_error(commandArg, 2);
		free(previous_pwd);
		return;
	}

	set_env("OLDPWD", previous_pwd, commandArg);
	set_env("PWD", home_directory, commandArg);
	free(previous_pwd);
	commandArg->status = 0;
}