LXR linux/include/uapi/linux/inotify.h

   1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2/*
   3 * Inode based directory notification for Linux
   4 *
   5 * Copyright (C) 2005 John McCutchan
   6 */
   7
   8#ifndef _UAPI_LINUX_INOTIFY_H
   9#define _UAPI_LINUX_INOTIFY_H
  10
  11/* For O_CLOEXEC and O_NONBLOCK */
  12#include <linux/fcntl.h>
  13#include <linux/types.h>
  14
  15/*
  16 * struct inotify_event - structure read from the inotify device for each event
  17 *
  18 * When you are watching a directory, you will receive the filename for events
  19 * such as IN_CREATE, IN_DELETE, IN_OPEN, IN_CLOSE, ..., relative to the wd.
  20 */
  21struct inotify_event {
  22        __s32           wd;             /* watch descriptor */
  23        __u32           mask;           /* watch mask */
  24        __u32           cookie;         /* cookie to synchronize two events */
  25        __u32           len;            /* length (including nulls) of name */
  26        char            name[0];        /* stub for possible name */
  27};
  28
  29/* the following are legal, implemented events that user-space can watch for */
  30#define IN_ACCESS               0x00000001      /* File was accessed */
  31#define IN_MODIFY               0x00000002      /* File was modified */
  32#define IN_ATTRIB               0x00000004      /* Metadata changed */
  33#define IN_CLOSE_WRITE          0x00000008      /* Writtable file was closed */
  34#define IN_CLOSE_NOWRITE        0x00000010      /* Unwrittable file closed */
  35#define IN_OPEN                 0x00000020      /* File was opened */
  36#define IN_MOVED_FROM           0x00000040      /* File was moved from X */
  37#define IN_MOVED_TO             0x00000080      /* File was moved to Y */
  38#define IN_CREATE               0x00000100      /* Subfile was created */
  39#define IN_DELETE               0x00000200      /* Subfile was deleted */
  40#define IN_DELETE_SELF          0x00000400      /* Self was deleted */
  41#define IN_MOVE_SELF            0x00000800      /* Self was moved */
  42
  43/* the following are legal events.  they are sent as needed to any watch */
  44#define IN_UNMOUNT              0x00002000      /* Backing fs was unmounted */
  45#define IN_Q_OVERFLOW           0x00004000      /* Event queued overflowed */
  46#define IN_IGNORED              0x00008000      /* File was ignored */
  47
  48/* helper events */
  49#define IN_CLOSE                (IN_CLOSE_WRITE | IN_CLOSE_NOWRITE) /* close */
  50#define IN_MOVE                 (IN_MOVED_FROM | IN_MOVED_TO) /* moves */
  51
  52/* special flags */
  53#define IN_ONLYDIR              0x01000000      /* only watch the path if it is a directory */
  54#define IN_DONT_FOLLOW          0x02000000      /* don't follow a sym link */
  55#define IN_EXCL_UNLINK          0x04000000      /* exclude events on unlinked objects */
  56#define IN_MASK_CREATE          0x10000000      /* only create watches */
  57#define IN_MASK_ADD             0x20000000      /* add to the mask of an already existing watch */
  58#define IN_ISDIR                0x40000000      /* event occurred against dir */
  59#define IN_ONESHOT              0x80000000      /* only send event once */
  60
  61/*
  62 * All of the events - we build the list by hand so that we can add flags in
  63 * the future and not break backward compatibility.  Apps will get only the
  64 * events that they originally wanted.  Be sure to add new events here!
  65 */
  66#define IN_ALL_EVENTS   (IN_ACCESS | IN_MODIFY | IN_ATTRIB | IN_CLOSE_WRITE | \
  67                         IN_CLOSE_NOWRITE | IN_OPEN | IN_MOVED_FROM | \
  68                         IN_MOVED_TO | IN_DELETE | IN_CREATE | IN_DELETE_SELF | \
  69                         IN_MOVE_SELF)
  70
  71/* Flags for sys_inotify_init1.  */
  72#define IN_CLOEXEC O_CLOEXEC
  73#define IN_NONBLOCK O_NONBLOCK
  74
  75/*
  76 * ioctl numbers: inotify uses 'I' prefix for all ioctls,
  77 * except historical FIONREAD, which is based on 'T'.
  78 *
  79 * INOTIFY_IOC_SETNEXTWD: set desired number of next created
  80 * watch descriptor.
  81 */
  82#define INOTIFY_IOC_SETNEXTWD   _IOW('I', 0, __s32)
  83
  84#endif /* _UAPI_LINUX_INOTIFY_H */
  85