src/t_futimens.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Check ctime updates when calling futimens without UTIME_OMIT for the
 * mtime entry.
 * Copyright (c) 2009 Eric Blake <ebb9@byu.net>
 */
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <sys/stat.h>

int
main(int argc, char **argv)
{
	int fd = creat ("file", 0600);
	struct stat st1, st2;
	struct timespec t[2] = { { 1000000000, 0 }, { 0, UTIME_OMIT } };

	fstat(fd, &st1);
	sleep(1);
	futimens(fd, t);
	fstat(fd, &st2);

	if (st1.st_ctime == st2.st_ctime)
		printf("failed to update ctime!\n");
	return 0;
}