#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdbool.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <unistd.h>

#define CIFS_IOC_NOTIFY  0x4005cf09

struct __attribute__((__packed__)) smb3_notify {
        uint32_t completion_filter;
        bool    watch_tree;
};

#define FILE_NOTIFY_CHANGE_FILE_NAME     0x00000001
#define FILE_NOTIFY_CHANGE_DIR_NAME      0x00000002
#define FILE_NOTIFY_CHANGE_ATTRIBUTES    0x00000004
#define FILE_NOTIFY_CHANGE_LAST_WRITE    0x00000010

int main()
{
        int fd, rc;
        struct smb3_notify n;

        fd = open(".",O_DIRECTORY|O_RDONLY);
        if (fd < 0) {
            perror("open");
            return EXIT_FAILURE;
        }
        n.watch_tree = true;
        n.completion_filter = (
                        FILE_NOTIFY_CHANGE_FILE_NAME |
                        FILE_NOTIFY_CHANGE_DIR_NAME |
                        FILE_NOTIFY_CHANGE_ATTRIBUTES |
                        FILE_NOTIFY_CHANGE_LAST_WRITE
                );
        rc = ioctl(fd, CIFS_IOC_NOTIFY, &n);
        close(fd);
        printf("CIFS_IOC_NOTIFY returned %d, errno:%d\n", rc, errno);
}