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+/*
+ * Inode based directory notification for Linux
+ *
+ * Copyright (C) 2005 John McCutchan
+ */
+
+#ifndef _LINUX_INOTIFY_H
+#define _LINUX_INOTIFY_H
+
+#include <linux/types.h>
+
+/*
+ * struct inotify_event - structure read from the inotify device for each event
+ *
+ * When you are watching a directory, you will receive the filename for events
+ * such as IN_CREATE, IN_DELETE, IN_OPEN, IN_CLOSE, ..., relative to the wd.
+ */
+struct inotify_event {
+ __s32 wd; /* watch descriptor */
+ __u32 mask; /* watch mask */
+ __u32 cookie; /* cookie to synchronize two events */
+ __u32 len; /* length (including nulls) of name */
+ char name[0]; /* stub for possible name */
+};
+
+/* the following are legal, implemented events that user-space can watch for */
+#define IN_ACCESS 0x00000001 /* File was accessed */
+#define IN_MODIFY 0x00000002 /* File was modified */
+#define IN_ATTRIB 0x00000004 /* Metadata changed */
+#define IN_CLOSE_WRITE 0x00000008 /* Writtable file was closed */
+#define IN_CLOSE_NOWRITE 0x00000010 /* Unwrittable file closed */
+#define IN_OPEN 0x00000020 /* File was opened */
+#define IN_MOVED_FROM 0x00000040 /* File was moved from X */
+#define IN_MOVED_TO 0x00000080 /* File was moved to Y */
+#define IN_CREATE 0x00000100 /* Subfile was created */
+#define IN_DELETE 0x00000200 /* Subfile was deleted */
+#define IN_DELETE_SELF 0x00000400 /* Self was deleted */
+#define IN_MOVE_SELF 0x00000800 /* Self was moved */
+
+/* the following are legal events. they are sent as needed to any watch */
+#define IN_UNMOUNT 0x00002000 /* Backing fs was unmounted */
+#define IN_Q_OVERFLOW 0x00004000 /* Event queued overflowed */
+#define IN_IGNORED 0x00008000 /* File was ignored */
+
+/* helper events */
+#define IN_CLOSE (IN_CLOSE_WRITE | IN_CLOSE_NOWRITE) /* close */
+#define IN_MOVE (IN_MOVED_FROM | IN_MOVED_TO) /* moves */
+
+/* special flags */
+#define IN_MASK_ADD 0x20000000 /* add to the mask of an already existing watch */
+#define IN_ISDIR 0x40000000 /* event occurred against dir */
+#define IN_ONESHOT 0x80000000 /* only send event once */
+
+/*
+ * All of the events - we build the list by hand so that we can add flags in
+ * the future and not break backward compatibility. Apps will get only the
+ * events that they originally wanted. Be sure to add new events here!
+ */
+#define IN_ALL_EVENTS (IN_ACCESS | IN_MODIFY | IN_ATTRIB | IN_CLOSE_WRITE | \
+ IN_CLOSE_NOWRITE | IN_OPEN | IN_MOVED_FROM | \
+ IN_MOVED_TO | IN_DELETE | IN_CREATE | IN_DELETE_SELF | \
+ IN_MOVE_SELF)
+
+#endif /* _LINUX_INOTIFY_H */