Function argscopy

components/lwp/lwp.c:436–462

* @brief Copy process arguments and environment variables from kernel space to user space. * * @param[in] lwp Pointer to the light-weight process structure * @param[in] argc Argument count * @param[in] argv Argument vector * @param[in] envp Environment variables * * @return Pointer to the process auxiliary structure on success * RT_NULL if memory allocation fails or arguments init

 *       4. Returns the auxiliary structure containing copied data
 */
struct process_aux *argscopy(struct rt_lwp *lwp, int argc, char **argv, char **envp)
{
    struct lwp_args_info ai;
    rt_err_t error;
    struct process_aux *ua;
    const char **tail_argv[2] = {0};

    error = lwp_args_init(&ai);
    if (error)
    {
        return RT_NULL;
    }

    if (argc > 0)
    {
        tail_argv[0] = (void *)argv[argc - 1];
        argv[argc - 1] = NULL;
        lwp_args_put(&ai, (void *)argv, LWP_ARGS_TYPE_KARG);
        lwp_args_put(&ai, (void *)tail_argv, LWP_ARGS_TYPE_KARG);
    }
    lwp_args_put(&ai, (void *)envp, LWP_ARGS_TYPE_KENVP);

    ua = lwp_argscopy(lwp, &ai);
    lwp_args_detach(&ai);

    return ua;
}

/**
 * @brief Creates and starts a new LWP by loading and executing the specified executable file.