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Linux读取或修改系统时间/Makefile

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+SRC := #
+SRC += main.c
+
+#OBJ := $(subst .c,.o,$(SRC))
+OBJ = $(SRC:%.c=%.o)
+
+CC = gcc
+FLAG = -Wall
+OPTION = -lpthread -ldl 
+EXEC_NAME = demo
+EXEC_PATH = .
+
+.PHONY:clean demo
+
+demo:$(OBJ)
+	@echo make ...
+	$(CC) $^ -o $(EXEC_PATH)/$(EXEC_NAME) $(FLAG) $(OPTION)
+	@echo make over
+	@echo Execute target is $(EXEC_PATH)/$(EXEC_NAME)
+$(OBJ):%.o:%.c
+	$(CC) -c -o $@ $< $(FLAG)
+clean:
+	@echo clean ...
+	rm $(EXEC_PATH)/$(EXEC_NAME) *.o -rf
+	@echo clean over

Linux读取或修改系统时间/main.c

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+#include <stdlib.h>
+#include <time.h>
+#include <sys/time.h>
+
+// 时间结构体
+struct tm *local_time;	// time to show or modify
+
+void settime(int tm_hour, int tm_min, int tm_sec)
+{
+	struct tm *time_set = NULL;
+	struct timeval tv;
+	struct timezone tz;
+	
+	/* 获取当前时间 */
+	gettimeofday(&tv, &tz);
+	/* 获取当前时间 */
+	time_set = gmtime(&tv.tv_sec);
+	/* 设置当前时间结构体 */
+	time_set->tm_hour = tm_hour;
+	time_set->tm_min = tm_min;
+	time_set->tm_sec = tm_sec;
+	/* 获取用秒表示的时间 */
+	tv.tv_sec = mktime(time_set);
+	/* 设置当前时间 */
+	settimeofday(&tv, &tz);
+}
+
+void refresh_clock(void)
+{
+	time_t timep;
+
+	time(&timep);
+	local_time = localtime(&timep);	 // 读取系统时间
+	
+	// 时分秒
+	int hour = local_time->tm_hour;
+	int minute = local_time->tm_min;
+	int second = local_time->tm_sec;
+	printf("h = %d, m = %d, s = %d\n", hour, minute, second);
+	
+}
+
+
+int main(int argc, char *argv[])
+{
+	
+	printf("修改前的时间：\n");
+	refresh_clock();
+	settime(11, 34, 50);
+	
+	printf("修改后的时间：\n");
+	refresh_clock();
+	return 0;
+}

Linux读取或修改系统时间/readme.txt

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+<EFBFBD>޸<EFBFBD>ϵͳʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҪrootȨ<EFBFBD>ޣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>sudo<EFBFBD><EFBFBD><EFBFBD>г<EFBFBD><EFBFBD><EFBFBD>