Function sys_log

components/lwp/lwp_syscall.c:4409–4439

* @brief Logs a message to the system logging mechanism. * * This system call writes a log message to the system log for diagnostic or informational purposes. * The message is specified by the `log` parameter, and its size is given by the `size` parameter. * The logging mechanism is typically used for tracking system events, debugging, or reporting errors. * * @param[in] log A pointer to t

 *          logging system is properly initialized before invoking this function.
 */
sysret_t sys_log(const char* log, int size)
{
    char *klog = RT_NULL;
    rt_device_t console = RT_NULL;

    if (!lwp_user_accessable((void *)log, size))
        return -EFAULT;

    klog = kmem_get(size);
    if (klog == RT_NULL)
    {
        return -ENOMEM;
    }

    if (lwp_get_from_user((void *)klog, (void *)log, size) != size)
    {
        kmem_put(klog);
        return -EINVAL;
    }

    console = rt_console_get_device();

    if (console && __sys_log_enable)
    {
        rt_device_write(console, -1, klog, size);
    }

    kmem_put(klog);

    return 0;
}

/**
 * @brief Retrieves information about a file or directory.