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/* |
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* Inode based directory notification for Linux |
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* |
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* Copyright (C) 2005 John McCutchan |
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*/ |
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#ifndef _LINUX_INOTIFY_H |
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#define _LINUX_INOTIFY_H |
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#include <linux/types.h> |
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/* |
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* struct inotify_event - structure read from the inotify device for each event |
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* |
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* When you are watching a directory, you will receive the filename for events |
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* such as IN_CREATE, IN_DELETE, IN_OPEN, IN_CLOSE, ..., relative to the wd. |
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*/ |
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struct inotify_event { |
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__s32 wd; /* watch descriptor */ |
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__u32 mask; /* watch mask */ |
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__u32 cookie; /* cookie to synchronize two events */ |
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__u32 len; /* length (including nulls) of name */ |
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char name[0]; /* stub for possible name */ |
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}; |
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/* the following are legal, implemented events that user-space can watch for */ |
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#define IN_ACCESS 0x00000001 /* File was accessed */ |
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#define IN_MODIFY 0x00000002 /* File was modified */ |
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#define IN_ATTRIB 0x00000004 /* Metadata changed */ |
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#define IN_CLOSE_WRITE 0x00000008 /* Writtable file was closed */ |
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#define IN_CLOSE_NOWRITE 0x00000010 /* Unwrittable file closed */ |
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#define IN_OPEN 0x00000020 /* File was opened */ |
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#define IN_MOVED_FROM 0x00000040 /* File was moved from X */ |
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#define IN_MOVED_TO 0x00000080 /* File was moved to Y */ |
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#define IN_CREATE 0x00000100 /* Subfile was created */ |
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#define IN_DELETE 0x00000200 /* Subfile was deleted */ |
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#define IN_DELETE_SELF 0x00000400 /* Self was deleted */ |
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/* the following are legal events. they are sent as needed to any watch */ |
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#define IN_UNMOUNT 0x00002000 /* Backing fs was unmounted */ |
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#define IN_Q_OVERFLOW 0x00004000 /* Event queued overflowed */ |
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#define IN_IGNORED 0x00008000 /* File was ignored */ |
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/* helper events */ |
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#define IN_CLOSE (IN_CLOSE_WRITE | IN_CLOSE_NOWRITE) /* close */ |
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#define IN_MOVE (IN_MOVED_FROM | IN_MOVED_TO) /* moves */ |
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/* special flags */ |
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#define IN_ISDIR 0x40000000 /* event occurred against dir */ |
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#define IN_ONESHOT 0x80000000 /* only send event once */ |
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/* |
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* All of the events - we build the list by hand so that we can add flags in |
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* the future and not break backward compatibility. Apps will get only the |
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* events that they originally wanted. Be sure to add new events here! |
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*/ |
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#define IN_ALL_EVENTS (IN_ACCESS | IN_MODIFY | IN_ATTRIB | IN_CLOSE_WRITE | \ |
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IN_CLOSE_NOWRITE | IN_OPEN | IN_MOVED_FROM | \ |
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IN_MOVED_TO | IN_DELETE | IN_CREATE | IN_DELETE_SELF) |
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#ifdef __KERNEL__ |
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#include <linux/dcache.h> |
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#include <linux/fs.h> |
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#include <linux/config.h> |
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#ifdef CONFIG_INOTIFY |
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extern void inotify_inode_queue_event(struct inode *, __u32, __u32, |
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const char *); |
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extern void inotify_dentry_parent_queue_event(struct dentry *, __u32, __u32, |
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const char *); |
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extern void inotify_unmount_inodes(struct list_head *); |
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extern void inotify_inode_is_dead(struct inode *); |
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extern u32 inotify_get_cookie(void); |
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#else |
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static inline void inotify_inode_queue_event(struct inode *inode, |
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__u32 mask, __u32 cookie, |
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const char *filename) |
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{ |
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} |
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static inline void inotify_dentry_parent_queue_event(struct dentry *dentry, |
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__u32 mask, __u32 cookie, |
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const char *filename) |
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{ |
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} |
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static inline void inotify_unmount_inodes(struct list_head *list) |
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{ |
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} |
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static inline void inotify_inode_is_dead(struct inode *inode) |
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{ |
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} |
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static inline u32 inotify_get_cookie(void) |
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{ |
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return 0; |
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} |
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#endif /* CONFIG_INOTIFY */ |
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#endif /* __KERNEL __ */ |
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#endif /* _LINUX_INOTIFY_H */ |
