Function sys_channel_reply

components/lwp/lwp_syscall.c:4255–4280

* @brief Sends a reply message through a communication channel. * * This system call is used to send a reply (`data`) through a communication channel identified * by the file descriptor `fd`. It is typically called in response to a received request * within a request-response communication pattern. The reply is sent to the requesting entity * through the same channel. * * @param[in] fd

 *          Sending invalid or corrupted data may lead to unexpected behavior or communication failures.
 */
sysret_t sys_channel_reply(int fd, rt_channel_msg_t data)
{
    rt_size_t ret = 0;
    rt_channel_msg_t kdata = RT_NULL;

    if (!lwp_user_accessable((void *)data, sizeof(*data)))
    {
        return -EFAULT;
    }

    kdata = kmem_get(sizeof(*data));
    if (kdata == RT_NULL)
        return -ENOMEM;

    if (lwp_get_from_user(kdata, data, sizeof(*kdata)) != sizeof(*data))
    {
        kmem_put(kdata);
        return -EFAULT;
    }

    ret = lwp_channel_reply(FDT_TYPE_LWP, fd, kdata);

    kmem_put(kdata);

    return ret;
}

/**
 * @brief Receives a message from a communication channel with a timeout.