kadm5_get_principals
ret = kadm5_get_principals(kadm_handlep, expression, &princs, &n_princs);
ret = kadm5_get_principals(kadm_handle, exp_str, &princs, &num_princs);
kadm5_get_principals (
retval = kadm5_get_principals(handle, expr, &names, &count);
code = kadm5_get_principals(handle, *argv, &princs, &num);
ret->code = kadm5_get_principals(handle, arg->exp, &ret->princs,
kadm5_ret_t kadm5_get_principals(void *server_handle,