RT-Thread Studio Ymodem

内核5.2.2中ry_sy.c文件中，_rym_recv_begin函数有bug，在接收ymodem的数据时候，不能创建文件，做了以下修复，

发布于 2026-06-03 14:30:46 浏览：103 订阅该版

更改之前：

```c
static enum rym_code _rym_recv_begin(
    struct rym_ctx *ctx,
    rt_uint8_t *buf,
    rt_size_t len)
{
    struct custom_ctx *cctx = (struct custom_ctx *)ctx;
    char insert_0 = '\0';
    char *ret;
    rt_err_t err;
    ret = strchr(cctx->fpath,insert_0);
    if(ret)
    {
        *ret = '/';
    }
    else
    {
        rt_kprintf("No end character\n");
        return RYM_ERR_ACK;
    }
    rt_strncpy(ret + 1, (const char *)buf, len - 1);
    cctx->fd = open(cctx->fpath, O_CREAT | O_WRONLY | O_TRUNC, 0);
    if (cctx->fd < 0)
    {
        err = rt_get_errno();
        rt_kprintf("error creating file: %d\n", err);
        return RYM_CODE_CAN;
    }
    cctx->flen = atoi(1 + (const char *)buf + rt_strnlen((const char *)buf, len - 1));
    if (cctx->flen == 0)
        cctx->flen = -1;

return RYM_CODE_ACK;
}

```

更改之后：
```c
static enum rym_code _rym_recv_begin(
    struct rym_ctx *ctx,
    rt_uint8_t *buf,
    rt_size_t len)
{
    struct custom_ctx *cctx = (struct custom_ctx *)ctx;
    cctx->fd = open(cctx->fpath, O_CREAT | O_WRONLY | O_TRUNC, 0);
    if (cctx->fd < 0)
    {
        int err = rt_get_errno();
        rt_kprintf("error creating file %s: %d\n", cctx->fpath, err);
        return RYM_CODE_CAN;
    }
    const char *p = (const char *)buf;
    int name_len = rt_strnlen(p, len);
    if (name_len < len - 1) {
        cctx->flen = atoi(p + name_len + 1);
    } else {
        cctx->flen = -1;
    }
    return RYM_CODE_ACK;
}
```