#include <stdio.h>
#include <syscall.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>

#define __NR_revoke	284

_syscall1(int, revoke, const char *, path)


int parent()
{
	int fd, ret;

	fd = open("/dev/null", O_RDWR);
	if (fd < 0) {
		printf("open() in parent failed!\n");
		return 1;
	}
	const char foo[] = "hsdfuknf23uhzfneiou1208jiomiiu";
	while (1) {
		printf("write...\n");
		ret = write(fd, foo, sizeof(foo));
		if (ret <= 0) {
			printf("write() in parent failed with %d (%s)!\n",
			       errno, strerror(errno));
			return 1;
		}
	}
}

int child()
{
	sleep(3);
	revoke("/dev/null");
	printf("revoke() returned %d (%s)\n",
	       errno, strerror(errno));

	return 0;
}

int main(int argc, char *argv[])
{
	int ret;

	ret = fork();
	if (ret == 0) {
		return child();
	} else if (ret == -1) {
		printf("fork() failed!\n");
		return 1;
	} else {
		return parent();
	}

	return 2;
}