selftests/timers/leap-a-day.c

9  *  kernel's leap-second behavior, as well as how well applications
10  *  handle the leap-second discontinuity.
12  *  Usage: leap-a-day [-s] [-i <num>]
15  *	-s:	Each iteration, set the date to 10 seconds before midnight GMT.
21  *	-i:	Number of iterations to run (default: infinite)
27  *	$ gcc leap-a-day.c -o leap-a-day -lrt
71 struct timespec timespec_add(struct timespec ts, unsigned long long ns)  in timespec_add()
75 		ts.tv_nsec -= NSEC_PER_SEC;  in timespec_add()
103 	 * -stable), had an issue with the state machine  in clear_time_state()
123 /* Make sure we cleanup on ctrl-c */
189 	while ((opt = getopt(argc, argv, "sti:")) != -1) {  in main()
192 …printf("Only setting leap-flag, not changing time. It could take up to a day for leap to trigger.\…  in main()
202 			printf("Usage: %s [-w] [-i <iterations>]\n", argv[0]);  in main()
203 			printf("	-w: Set flag and wait for leap second each iteration");  in main()
205 			printf("	-i: Number of iterations (-1 = infinite, default is 10)\n");  in main()
206 			printf("	-t: Print TAI time\n");  in main()
207 			exit(-1);  in main()
211 	/* Make sure TAI support is present if -t was used */  in main()
231 		printf("This runs continuously. Press ctrl-c to stop\n");  in main()
233 		printf("Running for %i iterations. Press ctrl-c to stop\n", iterations);  in main()
247 		next_leap += 86400 - (next_leap % 86400);  in main()
252 			tv.tv_sec = next_leap - 10;  in main()
291 		printf("Setting timer for %ld -  %s", next_leap, ctime(&next_leap));  in main()
296 		if (timer_create(CLOCK_REALTIME, &se, &tm1) == -1) {  in main()
307 		ts.tv_sec = next_leap - 3;  in main()
345 				buf[strlen(buf)-1] = 0; /*remove trailing\n */  in main()
359 		/* Switch to using other mode */  in main()
372 		if ((iterations != -1) && !(--iterations))  in main()