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 */ 21 struct 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[]; /* 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