修改Ymodem组件中MSH的ry命令，已便于自定义保存路径 (#6433)

* 修改ry命令，已便于自定义保存路径

* modified:   components/utilities/ymodem/ry_sy.c

components/utilities/ymodem/ry_sy.c

@@ -36,9 +36,21 @@ static enum rym_code _rym_recv_begin(
     rt_size_t len)
 {
     struct custom_ctx *cctx = (struct custom_ctx *)ctx;
-
-    cctx->fpath[0] = '/';
-    rt_strncpy(&(cctx->fpath[1]), (const char *)buf, len - 1);
+    struct stat file_buf;
+    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)
     {
@@ -154,7 +166,7 @@ static enum rym_code _rym_send_end(
     return RYM_CODE_SOH;
 }
 
-static rt_err_t rym_download_file(rt_device_t idev)
+static rt_err_t rym_download_file(rt_device_t idev,const char *file_path)
 {
     rt_err_t res;
     struct custom_ctx *ctx = rt_calloc(1, sizeof(*ctx));
@@ -165,6 +177,7 @@ static rt_err_t rym_download_file(rt_device_t idev)
         return RT_ENOMEM;
     }
     ctx->fd = -1;
+    rt_strncpy(ctx->fpath, file_path, DFS_PATH_MAX);
     RT_ASSERT(idev);
     res = rym_recv_on_device(&ctx->parent, idev, RT_DEVICE_OFLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
                              _rym_recv_begin, _rym_recv_data, _rym_recv_end, 1000);
@@ -201,9 +214,15 @@ static rt_err_t ry(uint8_t argc, char **argv)
 {
     rt_err_t res;
     rt_device_t dev;
-
-    if (argc > 1)
-        dev = rt_device_find(argv[1]);
+    /* temporarily support 1 file*/
+    const char *file_path;
+    if (argc < 2)
+    {
+        rt_kprintf("invalid file path.\n");
+        return -RT_ERROR;
+    }
+    if (argc > 2)
+        dev = rt_device_find(argv[2]);
     else
         dev = rt_console_get_device();
     if (!dev)
@@ -211,11 +230,12 @@ static rt_err_t ry(uint8_t argc, char **argv)
         rt_kprintf("could not find device.\n");
         return -RT_ERROR;
     }
-    res = rym_download_file(dev);
+    file_path = argv[1];
+    res = rym_download_file(dev,file_path);
 
     return res;
 }
-MSH_CMD_EXPORT(ry, YMODEM Receive e.g: ry [uart0] default by console.);
+MSH_CMD_EXPORT(ry, YMODEM Receive e.g: ry file_path [uart0] default by console.);
 
 static rt_err_t sy(uint8_t argc, char **argv)
 {