[PATCH] inotify
inotify is intended to correct the deficiencies of dnotify, particularly
its inability to scale and its terrible user interface:
* dnotify requires the opening of one fd per each directory
that you intend to watch. This quickly results in too many
open files and pins removable media, preventing unmount.
* dnotify is directory-based. You only learn about changes to
directories. Sure, a change to a file in a directory affects
the directory, but you are then forced to keep a cache of
stat structures.
* dnotify's interface to user-space is awful. Signals?
inotify provides a more usable, simple, powerful solution to file change
notification:
* inotify's interface is a system call that returns a fd, not SIGIO.
You get a single fd, which is select()-able.
* inotify has an event that says "the filesystem that the item
you were watching is on was unmounted."
* inotify can watch directories or files.
Inotify is currently used by Beagle (a desktop search infrastructure),
Gamin (a FAM replacement), and other projects.
See Documentation/filesystems/inotify.txt.
Signed-off-by: Robert Love <rml@novell.com>
Cc: John McCutchan <ttb@tentacle.dhs.org>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-07-13 04:06:03 +07:00
|
|
|
/*
|
|
|
|
|
* Inode based directory notification for Linux
|
|
|
|
|
*
|
|
|
|
|
* Copyright (C) 2005 John McCutchan
|
|
|
|
|
*/
|
|
|
|
|
#ifndef _LINUX_INOTIFY_H
|
|
|
|
|
#define _LINUX_INOTIFY_H
|
|
|
|
|
|
2010-02-26 08:28:57 +07:00
|
|
|
#include <linux/sysctl.h>
|
2012-10-13 16:46:48 +07:00
|
|
|
#include <uapi/linux/inotify.h>
|
|
|
|
|
|
2010-02-26 08:28:57 +07:00
|
|
|
extern struct ctl_table inotify_table[]; /* for sysctl */
|
2010-07-28 21:18:37 +07:00
|
|
|
|
|
|
|
|
#define ALL_INOTIFY_BITS (IN_ACCESS | IN_MODIFY | IN_ATTRIB | IN_CLOSE_WRITE | \
|
|
|
|
|
IN_CLOSE_NOWRITE | IN_OPEN | IN_MOVED_FROM | \
|
|
|
|
|
IN_MOVED_TO | IN_CREATE | IN_DELETE | \
|
|
|
|
|
IN_DELETE_SELF | IN_MOVE_SELF | IN_UNMOUNT | \
|
|
|
|
|
IN_Q_OVERFLOW | IN_IGNORED | IN_ONLYDIR | \
|
|
|
|
|
IN_DONT_FOLLOW | IN_EXCL_UNLINK | IN_MASK_ADD | \
|
|
|
|
|
IN_ISDIR | IN_ONESHOT)
|
|
|
|
|
|
[PATCH] inotify
inotify is intended to correct the deficiencies of dnotify, particularly
its inability to scale and its terrible user interface:
* dnotify requires the opening of one fd per each directory
that you intend to watch. This quickly results in too many
open files and pins removable media, preventing unmount.
* dnotify is directory-based. You only learn about changes to
directories. Sure, a change to a file in a directory affects
the directory, but you are then forced to keep a cache of
stat structures.
* dnotify's interface to user-space is awful. Signals?
inotify provides a more usable, simple, powerful solution to file change
notification:
* inotify's interface is a system call that returns a fd, not SIGIO.
You get a single fd, which is select()-able.
* inotify has an event that says "the filesystem that the item
you were watching is on was unmounted."
* inotify can watch directories or files.
Inotify is currently used by Beagle (a desktop search infrastructure),
Gamin (a FAM replacement), and other projects.
See Documentation/filesystems/inotify.txt.
Signed-off-by: Robert Love <rml@novell.com>
Cc: John McCutchan <ttb@tentacle.dhs.org>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-07-13 04:06:03 +07:00
|
|
|
#endif /* _LINUX_INOTIFY_H */
|