simple_shell/exec_builtins.c at master · Samfrodo9/simple_shell · GitHub

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#include "shell.h"

/**
 * exec_cd_dir - a function that changes the working directory
 * @argv: arguments
 *
 * Return: 1 on success, 0 on failure.
*/

int exec_cd_dir(char **argv)
{
	char *new_path = argv[1];
	char *current_path;

	if (new_path == NULL)
		new_path = getenv("HOME");
	else
	{
		switch (new_path[0])
		{
			case '~':
				new_path = getenv("HOME");
				break;
			case '-':
				new_path = getenv("OLDPWD");
				break;
			default:
				/* No need to do change 'new_path' here, */
				break;
		}
	}

		if (chdir(new_path) != 0)
		{
			perror("cd failed");
				return (1);
		}

		current_path = getcwd(NULL, 0);
		setenv("PWD", current_path, 1);
		free(current_path);

		return (0);
}


/**
 * exec_env - a function that prints environment variables.
 * @str: The string.
 *
 * Return: 0 on success.
*/

int exec_env(char **str)
{
	int i = 0;

	(void)str;

	while (environ[i])
	{
		_puts(environ[i]);
		i++;
	}

	return (0);
}


/**
* exec_exit - A function that terminates a process.
* @str: argument.
*
* Return: 0 on success.
*/

int exec_exit(char **str)
{
	if (str[1])
	{
		return (atoi(str[1]));
	}
	else
		return (0);
}