/*
 * Copyright (C) 2017  Hewlett Packard Enterprise Development LP
 *
 * 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.
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h> 
#include <sys/stat.h> 

int main(int argc, char **argv)
{
	int fd, ret;
	fd_set fds;
	char buf[256];

	if (argc != 2) {
		printf("USAGE: test_sysfs_notify badblocks-path\n");
		exit(1);
	}

	if ((fd = open(argv[1], O_RDONLY)) < 0) {
		printf("Unable to open %s\n", argv[1]);
		exit(1);
	}
	printf("Monitoring %s - ctl-c to stop\n", argv[1]);

	while (1) {
		memset(buf, 0, sizeof(buf));
		ret = lseek(fd, 0, SEEK_SET);
		ret = read(fd, buf, sizeof(buf));
		printf("%s\n", buf);

		FD_ZERO(&fds);
		FD_SET(fd, &fds);

		ret = select(fd + 1, NULL, NULL, &fds, NULL);
		if (ret <= 0) {
			printf("error (%d)\n", ret);
			exit(1);
		} else if (FD_ISSET(fd, &fds)) {
			printf("NOTIFIED!!\n");
		}
	}

	close(fd);
}