[example] 对版权信息进行人工扫描并添加确实的版权信息

68 files changed, 556 insertions, 67 deletions

diff --git a/examples/kernel/cpuusage.c b/examples/kernel/cpuusage.c
index 490061ddb7..5f9d480139 100644
--- a/examples/kernel/cpuusage.c
+++ b/examples/kernel/cpuusage.c
@@ -1,3 +1,11 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ *
+ */
 #include <rtthread.h>
 #include <rthw.h>
 
diff --git a/examples/kernel/event_simple.c b/examples/kernel/event_simple.c
index e377e721bb..d2a2948fc7 100644
--- a/examples/kernel/event_simple.c
+++ b/examples/kernel/event_simple.c
@@ -1,4 +1,12 @@
 /*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ *
+ */
+/*
  * 程序清单：事件例程
  *
  * 这个程序会创建3个动态线程及初始化一个静态事件对象
diff --git a/examples/kernel/heap_malloc.c b/examples/kernel/heap_malloc.c
index 271202ad8f..e2fa4511e7 100644
--- a/examples/kernel/heap_malloc.c
+++ b/examples/kernel/heap_malloc.c
@@ -1,3 +1,12 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ *
+ */
+
 #include <rtthread.h>
 #include "tc_comm.h"
 
diff --git a/examples/kernel/heap_realloc.c b/examples/kernel/heap_realloc.c
index bc7b56a999..ab603c5d8d 100644
--- a/examples/kernel/heap_realloc.c
+++ b/examples/kernel/heap_realloc.c
@@ -1,3 +1,12 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ *
+ */
+
 #include <rtthread.h>
 #include "tc_comm.h"
 
diff --git a/examples/kernel/mbox_send_wait.c b/examples/kernel/mbox_send_wait.c
index 86513fcb13..67f358ecea 100644
--- a/examples/kernel/mbox_send_wait.c
+++ b/examples/kernel/mbox_send_wait.c
@@ -1,4 +1,13 @@
 /*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ *
+ */
+
+/*
  * 程序清单：邮箱例程_发送阻塞
  *
  * 这个程序用来测试邮箱发送时候的阻塞情况。
diff --git a/examples/kernel/mbox_simple.c b/examples/kernel/mbox_simple.c
index 5d588decb3..3f39bc0016 100644
--- a/examples/kernel/mbox_simple.c
+++ b/examples/kernel/mbox_simple.c
@@ -1,4 +1,13 @@
 /*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ *
+ */
+
+/*
  * 程序清单：邮箱例程
  *
  * 这个程序会创建2个动态线程，一个静态的邮箱对象，其中一个线程往邮箱中发送邮件，
diff --git a/examples/kernel/memp_simple.c b/examples/kernel/memp_simple.c
index ab8f3b94ed..055db41912 100644
--- a/examples/kernel/memp_simple.c
+++ b/examples/kernel/memp_simple.c
@@ -1,4 +1,13 @@
 /*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ *
+ */
+
+/*
  * 程序清单：内存池例程
  *
  * 这个程序会创建一个静态的内存池对象，2个动态线程。两个线程会试图分别从内存池中获得
diff --git a/examples/kernel/messageq_simple.c b/examples/kernel/messageq_simple.c
index 51b371f59c..62504bebb7 100644
--- a/examples/kernel/messageq_simple.c
+++ b/examples/kernel/messageq_simple.c
@@ -1,4 +1,13 @@
 /*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ *
+ */
+
+/*
  * 程序清单：消息队列例程
  *
  * 这个程序会创建3个动态线程，一个线程会从消息队列中收取消息；一个线程会定时给消
diff --git a/examples/kernel/mutex_priority.c b/examples/kernel/mutex_priority.c
index f647fc4039..c1db934157 100755
--- a/examples/kernel/mutex_priority.c
+++ b/examples/kernel/mutex_priority.c
@@ -1,4 +1,13 @@
 /*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ *
+ */
+
+/*
  * 创建7个进程，tid20、tid21、tid22、tid23、tid24、tid25、tid26、tid27、tid28、tid29
  * 各任务优先级分别为20、21、22、23、24、25、26、27、28、29，
  * 其中tid26最先获得锁，tid22不需要使用到互斥锁，其他所有进程均需要使用互斥锁，
diff --git a/examples/kernel/mutex_simple.c b/examples/kernel/mutex_simple.c
index afbab3a3e1..4f6c5d7d28 100644
--- a/examples/kernel/mutex_simple.c
+++ b/examples/kernel/mutex_simple.c
@@ -1,5 +1,10 @@
 /*
- * 程序清单：
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ *
  */
 #include <rtthread.h>
 #include "tc_comm.h"
diff --git a/examples/kernel/semaphore_buffer_worker.c b/examples/kernel/semaphore_buffer_worker.c
index db3285c74b..5e4723b417 100644
--- a/examples/kernel/semaphore_buffer_worker.c
+++ b/examples/kernel/semaphore_buffer_worker.c
@@ -1,4 +1,13 @@
 /*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ *
+ */
+
+/*
  * 程序清单：信号量实现生产者消费者间的互斥
  *
  * 在这个程序中，会创建两个线程，一个是生成者线程worker一个是消费者线程thread
diff --git a/examples/kernel/semaphore_dynamic.c b/examples/kernel/semaphore_dynamic.c
index dc088e6e44..564d73c496 100644
--- a/examples/kernel/semaphore_dynamic.c
+++ b/examples/kernel/semaphore_dynamic.c
@@ -1,4 +1,13 @@
 /*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ *
+ */
+
+/*
  * 程序清单：动态信号量
  *
  * 这个例子中将创建一个动态信号量（初始值为0 ）及一个动态线程，在这个动态线程中
diff --git a/examples/kernel/semaphore_priority.c b/examples/kernel/semaphore_priority.c
index d6e3ce3914..7e37a826cb 100644
--- a/examples/kernel/semaphore_priority.c
+++ b/examples/kernel/semaphore_priority.c
@@ -1,3 +1,12 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ *
+ */
+
 #include <rtthread.h>
 #include "tc_comm.h"
 
diff --git a/examples/kernel/semaphore_producer_consumer.c b/examples/kernel/semaphore_producer_consumer.c
index a240cfa8b2..b6f996ff57 100644
--- a/examples/kernel/semaphore_producer_consumer.c
+++ b/examples/kernel/semaphore_producer_consumer.c
@@ -1,4 +1,13 @@
 /*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ *
+ */
+
+/*
  * 程序清单：生产者消费者例子
  *
  * 这个例子中将创建两个线程用于实现生产者消费者问题
diff --git a/examples/kernel/semaphore_static.c b/examples/kernel/semaphore_static.c
index cb199886a4..641b0bc7c9 100644
--- a/examples/kernel/semaphore_static.c
+++ b/examples/kernel/semaphore_static.c
@@ -1,4 +1,13 @@
 /*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ *
+ */
+
+/*
  * 程序清单：静态信号量
  *
  * 这个例子中将创建一个静态信号量（初始值为0 ）及一个静态线程，在这个静态线程中
diff --git a/examples/kernel/tc_comm.c b/examples/kernel/tc_comm.c
index f6493389a6..7153412aa0 100644
--- a/examples/kernel/tc_comm.c
+++ b/examples/kernel/tc_comm.c
@@ -1,3 +1,12 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ *
+ */
+
 #include "tc_comm.h"
 #ifdef RT_USING_FINSH
 #include <finsh.h>
diff --git a/examples/kernel/tc_comm.h b/examples/kernel/tc_comm.h
index c72c91ad53..17dd8eb924 100644
--- a/examples/kernel/tc_comm.h
+++ b/examples/kernel/tc_comm.h
@@ -1,3 +1,12 @@
+
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ *
+ */
 #ifndef __TC_COMM_H__
 #define __TC_COMM_H__
 
diff --git a/examples/kernel/tc_sample.c b/examples/kernel/tc_sample.c
index 212875b716..272edc0e39 100644
--- a/examples/kernel/tc_sample.c
+++ b/examples/kernel/tc_sample.c
@@ -1,3 +1,12 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ *
+ */
+
 #include <rtthread.h>
 #include "tc_comm.h"
 
diff --git a/examples/kernel/thread_delay.c b/examples/kernel/thread_delay.c
index f9404d704c..50740e2c8f 100644
--- a/examples/kernel/thread_delay.c
+++ b/examples/kernel/thread_delay.c
@@ -1,3 +1,12 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ *
+ */
+
 #include <rtthread.h>
 #include "tc_comm.h"
 
diff --git a/examples/kernel/thread_delete.c b/examples/kernel/thread_delete.c
index 72eb4ec008..924a823f35 100644
--- a/examples/kernel/thread_delete.c
+++ b/examples/kernel/thread_delete.c
@@ -1,4 +1,13 @@
 /*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ *
+ */
+
+/*
  * 程序清单：删除线程
  *
  * 这个例子会创建两个线程，在一个线程中删除另外一个线程。
diff --git a/examples/kernel/thread_detach.c b/examples/kernel/thread_detach.c
index 9370f212e1..d0d72d017b 100644
--- a/examples/kernel/thread_detach.c
+++ b/examples/kernel/thread_detach.c
@@ -1,4 +1,13 @@
 /*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ *
+ */
+
+/*
  * 程序清单：线程脱离
  *
  * 这个例子会创建两个线程，在其中一个线程中执行对另一个线程的脱离。
diff --git a/examples/kernel/thread_dynamic.c b/examples/kernel/thread_dynamic.c
index 0afb7f8f84..35c67c02fc 100644
--- a/examples/kernel/thread_dynamic.c
+++ b/examples/kernel/thread_dynamic.c
@@ -1,3 +1,12 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ *
+ */
+
 #include <rtthread.h>
 #include "tc_comm.h"
 
diff --git a/examples/kernel/thread_dynamic_simple.c b/examples/kernel/thread_dynamic_simple.c
index 28944b1f34..dc378a6696 100644
--- a/examples/kernel/thread_dynamic_simple.c
+++ b/examples/kernel/thread_dynamic_simple.c
@@ -1,4 +1,13 @@
 /*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ *
+ */
+
+/*
  * 程序清单：动态线程
  *
  * 这个程序会初始化2个动态线程，它们拥有共同的入口函数，但参数不相同
diff --git a/examples/kernel/thread_priority.c b/examples/kernel/thread_priority.c
index 0045b0e578..abf45bbe07 100644
--- a/examples/kernel/thread_priority.c
+++ b/examples/kernel/thread_priority.c
@@ -1,3 +1,12 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ *
+ */
+
 #include <rtthread.h>
 #include "tc_comm.h"
 
diff --git a/examples/kernel/thread_resume.c b/examples/kernel/thread_resume.c
index cea814616f..e776466326 100644
--- a/examples/kernel/thread_resume.c
+++ b/examples/kernel/thread_resume.c
@@ -1,4 +1,13 @@
 /*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ *
+ */
+
+/*
  * 程序清单：唤醒线程
  *
  * 这个例子中将创建两个动态线程，低优先级线程将挂起自身，然后
diff --git a/examples/kernel/thread_same_priority.c b/examples/kernel/thread_same_priority.c
index c7da2087a0..a238e24932 100644
--- a/examples/kernel/thread_same_priority.c
+++ b/examples/kernel/thread_same_priority.c
@@ -1,3 +1,12 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ *
+ */
+
 #include <rtthread.h>
 #include "tc_comm.h"
 
diff --git a/examples/kernel/thread_static.c b/examples/kernel/thread_static.c
index 3033f2cda1..9234255679 100644
--- a/examples/kernel/thread_static.c
+++ b/examples/kernel/thread_static.c
@@ -1,3 +1,12 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ *
+ */
+
 #include <rtthread.h>
 #include "tc_comm.h"
 
diff --git a/examples/kernel/thread_static_simple.c b/examples/kernel/thread_static_simple.c
index d9e3ff6f61..e0021d2c5f 100644
--- a/examples/kernel/thread_static_simple.c
+++ b/examples/kernel/thread_static_simple.c
@@ -1,4 +1,13 @@
 /*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ *
+ */
+
+/*
  * 程序清单：静态线程
  *
  * 这个程序会初始化2个静态线程，它们拥有共同的入口函数，但参数不相同
diff --git a/examples/kernel/thread_suspend.c b/examples/kernel/thread_suspend.c
index 947cc3cbf6..2219c7b8d6 100644
--- a/examples/kernel/thread_suspend.c
+++ b/examples/kernel/thread_suspend.c
@@ -1,4 +1,13 @@
 /*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ *
+ */
+
+/*
  * 程序清单：挂起线程
  *
  * 这个例子中将创建两个动态线程，高优先级线程将在一定时刻后挂起低优先级线程。
diff --git a/examples/kernel/thread_yield.c b/examples/kernel/thread_yield.c
index 4ed6b90e2a..97e57ba841 100644
--- a/examples/kernel/thread_yield.c
+++ b/examples/kernel/thread_yield.c
@@ -1,6 +1,12 @@
 /*
- * 程序清单：
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ *
  */
+
 #include <rtthread.h>
 #include "tc_comm.h"
 
diff --git a/examples/kernel/timer_control.c b/examples/kernel/timer_control.c
index d1f782fcce..c92d558d5c 100644
--- a/examples/kernel/timer_control.c
+++ b/examples/kernel/timer_control.c
@@ -1,4 +1,13 @@
 /*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ *
+ */
+
+/*
  * 程序清单：动态定时器例程
  *
  * 这个例程会创建1个动态周期型定时器对象，然后控制它进行定时时间长度的更改。
diff --git a/examples/kernel/timer_dynamic.c b/examples/kernel/timer_dynamic.c
index 1260d50c09..35d7b845dd 100644
--- a/examples/kernel/timer_dynamic.c
+++ b/examples/kernel/timer_dynamic.c
@@ -1,4 +1,13 @@
 /*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ *
+ */
+
+/*
  * 程序清单：动态定时器例程
  *
  * 这个例程会创建两个动态定时器对象，一个是单次定时，一个是周期性的定时
diff --git a/examples/kernel/timer_static.c b/examples/kernel/timer_static.c
index 884927bbc3..1523869b9a 100644
--- a/examples/kernel/timer_static.c
+++ b/examples/kernel/timer_static.c
@@ -1,4 +1,13 @@
 /*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ *
+ */
+
+/*
  * 程序清单：定时器例程
  *
  * 这个程序会初始化2个静态定时器，一个是单次定时，一个是周期性的定时
diff --git a/examples/kernel/timer_stop_self.c b/examples/kernel/timer_stop_self.c
index 38ec9c441b..584bc4128e 100644
--- a/examples/kernel/timer_stop_self.c
+++ b/examples/kernel/timer_stop_self.c
@@ -1,4 +1,13 @@
 /*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ *
+ */
+
+/*
  * 程序清单：动态定时器例程
  *
  * 这个例程会创建1个动态周期型定时器对象
diff --git a/examples/kernel/timer_timeout.c b/examples/kernel/timer_timeout.c
index 4d9a4fcc1d..40bbbf2831 100644
--- a/examples/kernel/timer_timeout.c
+++ b/examples/kernel/timer_timeout.c
@@ -1,4 +1,13 @@
 /*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ *
+ */
+
+/*
  * 程序清单：消息队列例程
  *
  * 这个程序会创建3个动态线程，一个线程会从消息队列中收取消息；一个线程会定时给消
diff --git a/examples/libc/dirent.c b/examples/libc/dirent.c
index 06b72110e3..03fa94151d 100644
--- a/examples/libc/dirent.c
+++ b/examples/libc/dirent.c
@@ -1,8 +1,11 @@
 /*
- * dirent.c
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
- *  Created on: 2010-11-17
- *      Author: bernard
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2010-11-17     Bernard      first version
  */
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/examples/libc/env.c b/examples/libc/env.c
index 6bc8ba4d7e..05005c2d1f 100644
--- a/examples/libc/env.c
+++ b/examples/libc/env.c
@@ -1,9 +1,13 @@
 /*
- * env.c
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
- *  Created on: 2010-11-17
- *      Author: bernard
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2010-11-17     Bernard      first version
  */
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <finsh.h>
diff --git a/examples/libc/ex1.c b/examples/libc/ex1.c
index f03fefbc00..8f0ccfff1c 100644
--- a/examples/libc/ex1.c
+++ b/examples/libc/ex1.c
@@ -1,3 +1,11 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
 /* Creates two threads, one printing 10000 "a"s, the other printing
    10000 "b"s.
    Illustrates: thread creation, thread joining. */
diff --git a/examples/libc/ex2.c b/examples/libc/ex2.c
index 925f4e1f23..df8f9a26a3 100644
--- a/examples/libc/ex2.c
+++ b/examples/libc/ex2.c
@@ -1,3 +1,11 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
 /* The classic producer-consumer example.
    Illustrates mutexes and conditions.
    All integers between 0 and 9999 should be printed exactly twice,
diff --git a/examples/libc/ex3.c b/examples/libc/ex3.c
index e4e3405d20..1697e7145b 100644
--- a/examples/libc/ex3.c
+++ b/examples/libc/ex3.c
@@ -1,3 +1,11 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
 /* Multi-thread searching.
    Illustrates: thread cancellation, cleanup handlers. */
 
diff --git a/examples/libc/ex4.c b/examples/libc/ex4.c
index eb79840372..ec1c533a98 100644
--- a/examples/libc/ex4.c
+++ b/examples/libc/ex4.c
@@ -1,3 +1,11 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
 /* Making a library function that uses static variables thread-safe.
    Illustrates: thread-specific data, pthread_once(). */
 
diff --git a/examples/libc/ex5.c b/examples/libc/ex5.c
index aa94c34063..cce5306894 100644
--- a/examples/libc/ex5.c
+++ b/examples/libc/ex5.c
@@ -1,3 +1,11 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
 /* The classic producer-consumer example, implemented with semaphores.
    All integers between 0 and 9999 should be printed exactly twice,
    once to the right of the arrow and once to the left. */
diff --git a/examples/libc/ex6.c b/examples/libc/ex6.c
index ecf813fef8..ac6319d74c 100644
--- a/examples/libc/ex6.c
+++ b/examples/libc/ex6.c
@@ -1,3 +1,11 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
 #include <errno.h>
 #include <stdio.h>
 #include <string.h>
diff --git a/examples/libc/ex7.c b/examples/libc/ex7.c
index e6473d48c2..e885f79c57 100644
--- a/examples/libc/ex7.c
+++ b/examples/libc/ex7.c
@@ -1,3 +1,11 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
 /* ex7
  *
  * Test case that illustrates a timed wait on a condition variable.
diff --git a/examples/libc/file.c b/examples/libc/file.c
index ea50e61628..79cdce3092 100644
--- a/examples/libc/file.c
+++ b/examples/libc/file.c
@@ -1,9 +1,13 @@
 /*
- * fstat.c
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
- *  Created on: 2010-11-17
- *      Author: bernard
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2010-11-17     Bernard      first version
  */
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <finsh.h>
diff --git a/examples/libc/memory.c b/examples/libc/memory.c
index d4f8e8dbde..063d90cfdc 100644
--- a/examples/libc/memory.c
+++ b/examples/libc/memory.c
@@ -1,9 +1,13 @@
 /*
- * memory.c
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
- *  Created on: 2010-11-17
- *      Author: bernard
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2010-11-17     Bernard      first version
  */
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <finsh.h>
diff --git a/examples/libc/mq.c b/examples/libc/mq.c
index 81ec6e35e8..a7f3f924dc 100644
--- a/examples/libc/mq.c
+++ b/examples/libc/mq.c
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2010-11-17     Bernard      first version
+ */
+
 #include <stdio.h>
 #include <fcntl.h>
 #include <stdlib.h>
diff --git a/examples/libc/printf.c b/examples/libc/printf.c
index 85e33671d6..c7968b9a0b 100644
--- a/examples/libc/printf.c
+++ b/examples/libc/printf.c
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2010-11-17     Bernard      first version
+ */
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <sys/fcntl.h>
diff --git a/examples/libc/rand.c b/examples/libc/rand.c
index 240519703b..96f5628bb8 100644
--- a/examples/libc/rand.c
+++ b/examples/libc/rand.c
@@ -1,9 +1,13 @@
 /*
- * rand.c
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
- *  Created on: 2010-11-17
- *      Author: bernard
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2010-11-17     Bernard      first version
  */
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <finsh.h>
diff --git a/examples/libc/sem.c b/examples/libc/sem.c
index 438a76b7f1..55b85114b8 100644
--- a/examples/libc/sem.c
+++ b/examples/libc/sem.c
@@ -1,3 +1,12 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
+
 #include <pthread.h>
 #include <semaphore.h>
 #include <stdio.h>
diff --git a/examples/libc/termios_test.c b/examples/libc/termios_test.c
index 192021b9ab..f65bff1a9f 100644
--- a/examples/libc/termios_test.c
+++ b/examples/libc/termios_test.c
@@ -1,8 +1,11 @@
 /*
- * termios_test.c
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
- *  Created on: 2017-12-06
- *      Author: JasonJia
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2017-12-06     JasonJia     first version
  */
 
 #include <rtthread.h>
diff --git a/examples/libc/time.c b/examples/libc/time.c
index d9a6cb5b8e..5e91c1df80 100644
--- a/examples/libc/time.c
+++ b/examples/libc/time.c
@@ -1,8 +1,11 @@
 /*
- * time.c
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
- *  Created on: 2010-11-17
- *      Author: bernard
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2010-11-17     Bernard      first version
  */
 
 #include <stdio.h>
diff --git a/examples/network/chargen.c b/examples/network/chargen.c
index 218449b845..3b4feaca9e 100644
--- a/examples/network/chargen.c
+++ b/examples/network/chargen.c
@@ -1,3 +1,12 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
+
 #include <rtthread.h>
 #include <sys/socket.h>
 
diff --git a/examples/network/tcpclient.c b/examples/network/tcpclient.c
index cc67645868..8f88985b10 100644
--- a/examples/network/tcpclient.c
+++ b/examples/network/tcpclient.c
@@ -1,3 +1,12 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
+
 #include <rtthread.h>
 #include <string.h>
 
diff --git a/examples/network/tcpsendpacket.c b/examples/network/tcpsendpacket.c
index 438423206f..da8bc4f524 100644
--- a/examples/network/tcpsendpacket.c
+++ b/examples/network/tcpsendpacket.c
@@ -1,3 +1,12 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
+
 #include <rtthread.h>
 
 #include <netdb.h>   /* 为了解析主机名，需要包含netdb.h头文件 */
diff --git a/examples/network/tcpserver.c b/examples/network/tcpserver.c
index 8c7382dcbb..e7438eb6f3 100644
--- a/examples/network/tcpserver.c
+++ b/examples/network/tcpserver.c
@@ -1,3 +1,12 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
+
 #include <rtthread.h>
 #include <string.h>
 
diff --git a/examples/network/udpclient.c b/examples/network/udpclient.c
index f8c42f3a12..1a3f0268af 100644
--- a/examples/network/udpclient.c
+++ b/examples/network/udpclient.c
@@ -1,3 +1,12 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
+
 #include <rtthread.h>
 
 #include <sys/socket.h> /* 使用BSD socket，需要包含sockets.h头文件 */
diff --git a/examples/network/udpserver.c b/examples/network/udpserver.c
index a249475e04..a33a27da10 100644
--- a/examples/network/udpserver.c
+++ b/examples/network/udpserver.c
@@ -1,3 +1,12 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
+
 #include <rtthread.h>
 #include <string.h>
 
diff --git a/examples/test/device_test.c b/examples/test/device_test.c
index d62c2168ff..f9a7591478 100644
--- a/examples/test/device_test.c
+++ b/examples/test/device_test.c
@@ -1,11 +1,7 @@
 /*
- * File      : device_test.c
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2011, RT-Thread Development Team
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://openlab.rt-thread.com/license/LICENSE.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/examples/test/fs_test.c b/examples/test/fs_test.c
index 2404b82e59..a86bbd6ac2 100644
--- a/examples/test/fs_test.c
+++ b/examples/test/fs_test.c
@@ -1,11 +1,7 @@
 /*
- * File      : fs_test.c
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2011, RT-Thread Development Team
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://openlab.rt-thread.com/license/LICENSE.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/examples/test/hwtimer_test.c b/examples/test/hwtimer_test.c
index b488c305b2..15d7aa830f 100644
--- a/examples/test/hwtimer_test.c
+++ b/examples/test/hwtimer_test.c
@@ -1,3 +1,12 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
+
 #include <rtthread.h>
 #include <rtdevice.h>
 #include <finsh.h>
diff --git a/examples/test/mem_test.c b/examples/test/mem_test.c
index 549be80ab4..cd7d1b3552 100644
--- a/examples/test/mem_test.c
+++ b/examples/test/mem_test.c
@@ -1,3 +1,12 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
+
 #include <stdint.h>
 
 #include <rthw.h>
diff --git a/examples/test/net_test.c b/examples/test/net_test.c
index de143147d1..656686f091 100644
--- a/examples/test/net_test.c
+++ b/examples/test/net_test.c
@@ -1,4 +1,13 @@
 /*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
+
+/*
  * Net Test Utilities for RT-Thread
  */
 #include <rtthread.h>
diff --git a/examples/test/rbb_test.c b/examples/test/rbb_test.c
index f276c993da..c4236bca44 100644
--- a/examples/test/rbb_test.c
+++ b/examples/test/rbb_test.c
@@ -1,21 +1,7 @@
 /*
- * File      : rbb_test.c
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006 - 2018, RT-Thread Development Team
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2 of the License, or
- *  (at your option) any later version.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/examples/test/rtc_test.c b/examples/test/rtc_test.c
index 48129ca36c..4ed1349de4 100644
--- a/examples/test/rtc_test.c
+++ b/examples/test/rtc_test.c
@@ -1,26 +1,13 @@
 /*
- * File      : rtc_test.c
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2017, RT-Thread Development Team
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2 of the License, or
- *  (at your option) any later version.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author         Notes
  * 2018-01-15     Liu2guang      the first version.
  */
+
 #include <rtthread.h>
 #include <rtdevice.h>
 
diff --git a/examples/ymodem/echo.c b/examples/ymodem/echo.c
index 5cb807f519..fdd7e5228b 100644
--- a/examples/ymodem/echo.c
+++ b/examples/ymodem/echo.c
@@ -1,3 +1,12 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
+
 #include <ymodem.h>
 
 static rt_device_t _odev;
diff --git a/examples/ymodem/null.c b/examples/ymodem/null.c
index c72ea064f8..640b8ba11b 100644
--- a/examples/ymodem/null.c
+++ b/examples/ymodem/null.c
@@ -1,3 +1,12 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
+
 #include <ymodem.h>
 
 static enum rym_code _rym_dummy_write(
diff --git a/examples/ymodem/tofile.c b/examples/ymodem/tofile.c
index 4a3705ede7..35dca2f2c1 100644
--- a/examples/ymodem/tofile.c
+++ b/examples/ymodem/tofile.c
@@ -1,3 +1,12 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
+
 #include <rtthread.h>
 #include <ymodem.h>
 #include <dfs_posix.h>