#ifndef _FANOTIFY_H
#define _FANOTIFY_H

#ifdef __cplusplus
extern "C" {
#endif

struct fanotify_event_metadata {
  unsigned event_len;
  unsigned char vers;
  unsigned char reserved;
  unsigned short metadata_len;
  unsigned long long mask
#ifdef __GNUC__
      __attribute__((__aligned__(8)))
#endif
      ;
  int fd;
  int pid;
};

struct fanotify_response {
  int fd;
  unsigned response;
};

#define FAN_ACCESS 0x01
#define FAN_MODIFY 0x02
#define FAN_CLOSE_WRITE 0x08
#define FAN_CLOSE_NOWRITE 0x10
#define FAN_OPEN 0x20
#define FAN_Q_OVERFLOW 0x4000
#define FAN_OPEN_PERM 0x10000
#define FAN_ACCESS_PERM 0x20000
#define FAN_ONDIR 0x40000000
#define FAN_EVENT_ON_CHILD 0x08000000
#define FAN_CLOSE (FAN_CLOSE_WRITE | FAN_CLOSE_NOWRITE)
#define FAN_CLOEXEC 0x01
#define FAN_NONBLOCK 0x02
#define FAN_CLASS_NOTIF 0
#define FAN_CLASS_CONTENT 0x04
#define FAN_CLASS_PRE_CONTENT 0x08
#define FAN_ALL_CLASS_BITS \
  (FAN_CLASS_NOTIF | FAN_CLASS_CONTENT | FAN_CLASS_PRE_CONTENT)
#define FAN_UNLIMITED_QUEUE 0x10
#define FAN_UNLIMITED_MARKS 0x20
#define FAN_ALL_INIT_FLAGS                                                 \
  (FAN_CLOEXEC | FAN_NONBLOCK | FAN_ALL_CLASS_BITS | FAN_UNLIMITED_QUEUE | \
   FAN_UNLIMITED_MARKS)
#define FAN_MARK_ADD 0x01
#define FAN_MARK_REMOVE 0x02
#define FAN_MARK_DONT_FOLLOW 0x04
#define FAN_MARK_ONLYDIR 0x08
#define FAN_MARK_MOUNT 0x10
#define FAN_MARK_IGNORED_MASK 0x20
#define FAN_MARK_IGNORED_SURV_MODIFY 0x40
#define FAN_MARK_FLUSH 0x80
#define FAN_ALL_MARK_FLAGS                                                    \
  (FAN_MARK_ADD | FAN_MARK_REMOVE | FAN_MARK_DONT_FOLLOW | FAN_MARK_ONLYDIR | \
   FAN_MARK_MOUNT | FAN_MARK_IGNORED_MASK | FAN_MARK_IGNORED_SURV_MODIFY |    \
   FAN_MARK_FLUSH)
#define FAN_ALL_EVENTS (FAN_ACCESS | FAN_MODIFY | FAN_CLOSE | FAN_OPEN)
#define FAN_ALL_PERM_EVENTS (FAN_OPEN_PERM | FAN_ACCESS_PERM)
#define FAN_ALL_OUTGOING_EVENTS \
  (FAN_ALL_EVENTS | FAN_ALL_PERM_EVENTS | FAN_Q_OVERFLOW)
#define FANOTIFY_METADATA_VERSION 3
#define FAN_ALLOW 0x01
#define FAN_DENY 0x02
#define FAN_NOFD -1
#define FAN_EVENT_METADATA_LEN (sizeof(struct fanotify_event_metadata))
#define FAN_EVENT_NEXT(meta, len) \
  ((len) -= (meta)->event_len,    \
   (struct fanotify_event_metadata*)(((char*)(meta)) + (meta)->event_len))
#define FAN_EVENT_OK(meta, len)                               \
  ((long)(len) >= (long)FAN_EVENT_METADATA_LEN &&             \
   (long)(meta)->event_len >= (long)FAN_EVENT_METADATA_LEN && \
   (long)(meta)->event_len <= (long)(len))

int fanotify_init(unsigned, unsigned);
int fanotify_mark(int, unsigned, unsigned long long, int, const char*);

#ifdef __cplusplus
}
#endif
#endif