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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 | */ |
20 | struct 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> |
75 | extern 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 |
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