1/* 2 * Inode based directory notification for Linux 3 * 4 * Copyright (C) 2005 John McCutchan 5 */ 6 7#ifndef _LINUX_INOTIFY_H 8#define _LINUX_INOTIFY_H 9 10/* For O_CLOEXEC and O_NONBLOCK */ 11#include <linux/fcntl.h> 12#include <linux/types.h> 13 14/* 15 * struct inotify_event - structure read from the inotify device for each event 16 * 17 * When you are watching a directory, you will receive the filename for events 18 * such as IN_CREATE, IN_DELETE, IN_OPEN, IN_CLOSE, ..., relative to the wd. 19 */ 20struct inotify_event { 21 __s32 wd; /* watch descriptor */ 22 __u32 mask; /* watch mask */ 23 __u32 cookie; /* cookie to synchronize two events */ 24 __u32 len; /* length (including nulls) of name */ 25 char name[0]; /* stub for possible name */ 26}; 27 28/* the following are legal, implemented events that user-space can watch for */ 29#define IN_ACCESS 0x00000001 /* File was accessed */ 30#define IN_MODIFY 0x00000002 /* File was modified */ 31#define IN_ATTRIB 0x00000004 /* Metadata changed */ 32#define IN_CLOSE_WRITE 0x00000008 /* Writtable file was closed */ 33#define IN_CLOSE_NOWRITE 0x00000010 /* Unwrittable file closed */ 34#define IN_OPEN 0x00000020 /* File was opened */ 35#define IN_MOVED_FROM 0x00000040 /* File was moved from X */ 36#define IN_MOVED_TO 0x00000080 /* File was moved to Y */ 37#define IN_CREATE 0x00000100 /* Subfile was created */ 38#define IN_DELETE 0x00000200 /* Subfile was deleted */ 39#define IN_DELETE_SELF 0x00000400 /* Self was deleted */ 40#define IN_MOVE_SELF 0x00000800 /* Self was moved */ 41 42/* the following are legal events. they are sent as needed to any watch */ 43#define IN_UNMOUNT 0x00002000 /* Backing fs was unmounted */ 44#define IN_Q_OVERFLOW 0x00004000 /* Event queued overflowed */ 45#define IN_IGNORED 0x00008000 /* File was ignored */ 46 47/* helper events */ 48#define IN_CLOSE (IN_CLOSE_WRITE | IN_CLOSE_NOWRITE) /* close */ 49#define IN_MOVE (IN_MOVED_FROM | IN_MOVED_TO) /* moves */ 50 51/* special flags */ 52#define IN_ONLYDIR 0x01000000 /* only watch the path if it is a directory */ 53#define IN_DONT_FOLLOW 0x02000000 /* don't follow a sym link */ 54#define IN_EXCL_UNLINK 0x04000000 /* exclude events on unlinked objects */ 55#define IN_MASK_ADD 0x20000000 /* add to the mask of an already existing watch */ 56#define IN_ISDIR 0x40000000 /* event occurred against dir */ 57#define IN_ONESHOT 0x80000000 /* only send event once */ 58 59/* 60 * All of the events - we build the list by hand so that we can add flags in 61 * the future and not break backward compatibility. Apps will get only the 62 * events that they originally wanted. Be sure to add new events here! 63 */ 64#define IN_ALL_EVENTS (IN_ACCESS | IN_MODIFY | IN_ATTRIB | IN_CLOSE_WRITE | \ 65 IN_CLOSE_NOWRITE | IN_OPEN | IN_MOVED_FROM | \ 66 IN_MOVED_TO | IN_DELETE | IN_CREATE | IN_DELETE_SELF | \ 67 IN_MOVE_SELF) 68 69/* Flags for sys_inotify_init1. */ 70#define IN_CLOEXEC O_CLOEXEC 71#define IN_NONBLOCK O_NONBLOCK 72 73#ifdef __KERNEL__ 74#include <linux/sysctl.h> 75extern struct ctl_table inotify_table[]; /* for sysctl */ 76 77#define ALL_INOTIFY_BITS (IN_ACCESS | IN_MODIFY | IN_ATTRIB | IN_CLOSE_WRITE | \ 78 IN_CLOSE_NOWRITE | IN_OPEN | IN_MOVED_FROM | \ 79 IN_MOVED_TO | IN_CREATE | IN_DELETE | \ 80 IN_DELETE_SELF | IN_MOVE_SELF | IN_UNMOUNT | \ 81 IN_Q_OVERFLOW | IN_IGNORED | IN_ONLYDIR | \ 82 IN_DONT_FOLLOW | IN_EXCL_UNLINK | IN_MASK_ADD | \ 83 IN_ISDIR | IN_ONESHOT) 84 85#endif 86 87#endif /* _LINUX_INOTIFY_H */ 88