Function lwp_get_command_line_args

components/lwp/lwp_args.c:812–864

* @brief Get command line arguments from light-weight process * * @param[in] lwp Pointer to the light-weight process structure * * @return char** Returns a NULL-terminated array of argument strings on success: * - The array and each string are allocated in kernel space * - The caller is responsible for freeing using lwp_free_command_line_args() * RT_NULL Returns NULL

 *       proper NULL termination of the argument vector.
 */
char **lwp_get_command_line_args(struct rt_lwp *lwp)
{
    size_t argc = 0;
    char **argv = NULL;
    int ret;
    size_t i;
    size_t len;

    if (lwp)
    {
        ret = lwp_data_get(lwp, &argc, lwp->args, sizeof(argc));
        if (ret == 0)
        {
            return RT_NULL;
        }
        argv = (char**)rt_calloc((argc + 1), sizeof(char*));

        if (argv)
        {
            for (i = 0; i < argc; i++)
            {
                char *argvp = NULL;
                ret = lwp_data_get(lwp, &argvp, &((char **)lwp->args)[1 + i], sizeof(argvp));
                if (ret == 0)
                {
                    goto error_exit;
                }

                len = lwp_user_strlen_ext(lwp, argvp);
                if (len >= 0)
                {
                    argv[i] = (char*)rt_malloc(len + 1);
                    ret = lwp_data_get(lwp, argv[i], argvp, len);
                    if (ret != len)
                    {
                        goto error_exit;
                    }
                    argv[i][len] = '\0';
                }
                else
                {
                    goto error_exit;
                }
            }
            argv[argc] = NULL;
        }
    }

    return argv;
error_exit:
    lwp_free_command_line_args(argv);
    return RT_NULL;
}

/**
 * @brief Print environment variables of light-weight process