[drivers][serial] ioctl add F_SETFL cmd (#5876)

components/drivers/serial/serial.c

@@ -115,6 +115,8 @@ static int serial_fops_close(struct dfs_fd *fd)
 static int serial_fops_ioctl(struct dfs_fd *fd, int cmd, void *args)
 {
     rt_device_t device;
+    int flags = (int)(rt_base_t)args;
+    int mask  = O_NONBLOCK | O_APPEND;
 
     device = (rt_device_t)fd->data;
     switch (cmd)
@@ -123,6 +125,11 @@ static int serial_fops_ioctl(struct dfs_fd *fd, int cmd, void *args)
         break;
     case FIONWRITE:
         break;
+    case F_SETFL:
+        flags &= mask;
+        fd->flags &= ~mask;
+        fd->flags |= flags;
+        break;
     }
 
     return rt_device_control(device, cmd, args);

components/drivers/serial/serial_v2.c

@@ -94,6 +94,8 @@ static int serial_fops_close(struct dfs_fd *fd)
 static int serial_fops_ioctl(struct dfs_fd *fd, int cmd, void *args)
 {
     rt_device_t device;
+    int flags = (int)(rt_base_t)args;
+    int mask  = O_NONBLOCK | O_APPEND;
 
     device = (rt_device_t)fd->data;
     switch (cmd)
@@ -102,6 +104,11 @@ static int serial_fops_ioctl(struct dfs_fd *fd, int cmd, void *args)
         break;
     case FIONWRITE:
         break;
+    case F_SETFL:
+        flags &= mask;
+        fd->flags &= ~mask;
+        fd->flags |= flags;
+        break;
     }
 
     return rt_device_control(device, cmd, args);