int execute_ast(t_ast *node, t_ms_data *data)
execute Abstract Syntax Tree
int execute(t_ms_data *data)
execute distribution function
int builtin_pipe(t_ast *node, t_ms_data *data)
int redirect_out(t_ast *node, t_ms_data *data)
int redirect_in(t_ast *node, t_ms_data *data)
int redirect_append(t_ast *node, t_ms_data *data)
int redirect_here_doc(t_ast *node, t_ms_data *data)