Function _rym_send_begin

components/utilities/ymodem/ry_sy.c:113–151

}

static enum rym_code _rym_send_begin(
    struct rym_ctx *ctx,
    rt_uint8_t *buf,
    rt_size_t len)
{
    struct custom_ctx *cctx = (struct custom_ctx *)ctx;
    struct stat file_buf;
    char insert_0 = '\0';
    rt_err_t err;

    cctx->fd = open(cctx->fpath, O_RDONLY);
    if (cctx->fd < 0)
    {
        err = rt_get_errno();
        rt_kprintf("error open file: %d\n", err);
        return RYM_ERR_FILE;
    }
    rt_memset(buf, 0, len);
    err = stat(cctx->fpath, &file_buf);
    if (err != RT_EOK)
    {
        rt_kprintf("error open file.\n");
        return RYM_ERR_FILE;
    }

    const char *fdst = _get_path_lastname(cctx->fpath);
    if(fdst != cctx->fpath)
    {
        fdst = dfs_normalize_path(RT_NULL, fdst);
        if (fdst == RT_NULL)
        {
            return RYM_ERR_FILE;
        }
    }

    rt_sprintf((char *)buf, "%s%c%d", fdst, insert_0, file_buf.st_size);

    return RYM_CODE_SOH;
}

static enum rym_code _rym_send_data(
    struct rym_ctx *ctx,