缩小变量作用域：消除18处variableScope，声明移入实际使用块

Drivers/BSP/NET/lftpd/lftpd.c

@@ -633,11 +633,11 @@ int lftpd_start(const char *directory, int port, lftpd_t *lftpd)
         }
 
         {
-            char ip_str[16];
             struct net_sockaddr_in addr;
             int addrlen = sizeof(addr);
             if (net_getsockname(client_socket,
                                 (struct net_sockaddr *)&addr, &addrlen) == 0) {
+                char ip_str[16];
                 net_inet_ntoa(addr.sin_addr.s_addr, ip_str);
                 int remote_port = lftpd_inet_get_socket_port(client_socket);
                 lftpd_log_info("connection received from %s:%d...",

Drivers/BSP/NET/lftpd/lftpd_inet.c

@@ -8,10 +8,9 @@
 int lftpd_inet_listen(int port)
 {
     int retry;
-    int s;
 
     for (retry = 0; retry < 5; retry++) {
-        s = net_socket(NET_AF_INET, NET_SOCK_STREAM);
+        int s = net_socket(NET_AF_INET, NET_SOCK_STREAM);
         if (s < 0) {
             if (retry == 0) DBG_ERROR("create socket");
             vTaskDelay(pdMS_TO_TICKS(500));

Drivers/BSP/NET/lftpd/lftpd_io.c

@@ -201,10 +201,9 @@ void *lftpd_io_opendir(const char *path)
 int lftpd_io_readdir(void *dp, char *name, int name_max, uint32_t *p_size, int *p_is_dir)
 {
     FILINFO fno;
-    FRESULT fr;
 
     while (1) {
-        fr = f_readdir((DIR *)dp, &fno);
+        FRESULT fr = f_readdir((DIR *)dp, &fno);
         if (fr != FR_OK || fno.fname[0] == 0) {
             return -1;
         }