failure-gen.c

failure-gen.c

#include <stdio.h>
#include <stdlib.h>
#include <sys/inotify.h>

#define PATH_MAX_LEN	128
#define BUF_LEN		sizeof(struct inotify_event) + PATH_MAX_LEN + 1

static void handleInotifyEvent(struct inotify_event *ie)
{
	void *p = NULL;

	switch (ie->mask) {
	case IN_CREATE:
		exit(0);
	case IN_DELETE:
		printf("IN_DELETE\n");
		while (1) {
			p = calloc(1, sizeof(1024 * 1024 * 1024));
		}
		break;
	default:
		printf("Unsupported mask: %d :(\n", ie->mask);
	}

	if (ie->len > 0)
		printf("fname = %s\n", ie->name);

	return;
}

int main(int argc, char *argv[])
{
	char buf[BUF_LEN] __attribute__((aligned(8)));
	struct inotify_event *ie;
	int ifd, nr;
	char *p;

	if (argc < 2) {
		fprintf(stderr, "Usage %s pathname\n", argv[0]);
		exit(1);
	}

	ifd = inotify_init();
	if (ifd == -1) {
		perror("Init inotify failed: ");
		exit(1);
	}

	if (inotify_add_watch(ifd, argv[1], IN_ALL_EVENTS) == -1) {
		perror("Add watch failed: ");
		exit(1);
	}

	while (1) {
		nr = read(ifd, buf, BUF_LEN);
		if (nr == -1) {
			perror("Read from ifd failed: ");
			exit(1);
		}
		if (nr == 0) {
			fprintf(stderr, "Read from ifd return 0!\n");
			exit(1);
		}

		printf("Read %d bytes from ifd\n", nr);
		p = buf;
		ie = (struct inotify_event *)p;
		handleInotifyEvent(ie);
	}

	return 0;
}