/* compile with unpatched sys/features.h */
#define _POSIX_MONOTONIC_CLOCK 200112L
#include <time.h>
#include <stdio.h>
#include <unistd.h>

int
main(void)
{
	int n, ret;
	struct timespec *res;

	ret = clock_getres(CLOCK_MONOTONIC, res);
	if (ret < 0) {
		printf("ERROR: clock_getres(CLOCK_MONOTONIC) failed\n");
		return ret;
	}
	printf("%ld:%ld\n", res->tv_sec, res->tv_nsec);

	n = 0;
	while (n < 5)
	{
		sleep(1);
		ret = clock_gettime(CLOCK_MONOTONIC, res);
		if (ret < 0) {
			printf("ERROR: clock_gettime(CLOCK_MONOTONIC) failed\n");
			return ret;
		}
		printf("%ld:%09ld\n", res->tv_sec, res->tv_nsec);
		n++;
	}

	ret = clock_setres(CLOCK_MONOTONIC, res);
	if (ret != -1) {
		printf("ERROR: clock_setres(CLOCK_MONOTONIC) must fail\n");
		return -1;
	}

	return 0;
}