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definition module Inotify
/**
* Links with Linux's inotify
*/
from Data.Either import ::Either
from Data.Maybe import ::Maybe
/**
* An inotify file descriptor
*
* @var A state that is used for callbacks
*/
:: *Inotify st
//* An inotify watch descriptor
:: INWatch
//* An inotify event mask
:: INMask :== Int
//* An inotify event
:: INEvent :== Int
/**
* An inotify callback: event, maybe filename, state, world -> state, world
*
* @var A state that is passed on.
*/
:: INCallback st :== INEvent (Maybe String) st *World -> *(st, *World)
//* Bitwise OR for event masks
(|-) infixl 6 :: (INMask INMask -> INMask)
/**
* Initialise an inotify file descriptor with some state.
*
* @param The initial state
* @result A file descriptor or Nothing if the C initialisation failed
*/
inotify_init :: st -> Maybe *(Inotify st)
/**
* Close an inotify file descriptor and get back the state
*
* @param The file descriptor
* @result The final state
*/
inotify_close :: *(Inotify st) -> st
/**
* Add a watch on some file
*
* @param The callback for events
* @param A mask of events to watch for
* @param The filename
* @param The inotify file descriptor
* @result Either an error code or a watch descriptor, and the inotify file descriptor
*/
inotify_add_watch :: (INCallback st) !INMask !String !*(Inotify st)
-> *(!Either Int INWatch, !*Inotify st)
/**
* Remove a watch
*
* @param The watch to remove
* @param The inotify file descriptor
* @result A boolean indicating success and the inotify file descriptor
*/
inotify_rm_watch :: !INWatch !*(Inotify st) -> *(!Bool, !*Inotify st)
/**
* Poll an inotify file descriptor; i.e. wait for new events
*
* @param Timeout in milliseconds (Nothing for no timeout)
* @param The inotify file descriptor
* @result The number of events, and the inotify file descriptor
*/
inotify_poll :: !(Maybe Int) !*(Inotify st) -> *(!Int, !*Inotify st)
/**
* Check for new events and call callbacks
*/
inotify_check :: !*(Inotify st) !*World -> *(!*Inotify st, !*World)
/**
* Check if an event matches a mask
*
* @param The mask
* @param The event
* @result True iff the event matches the mask
*/
inotify_is_event :: INMask INEvent -> Bool
/**
* Combination of inotify_poll and inotify_check that will return only if no
* events were given when a timeout occurred.
*
* @param Timeout in milliseconds (Nothing for no timeout)
* @param The inotify file descriptor
* @param The World
* @result The inotify file descriptor and the World. However, the function
* only returns if no events were given when the timeout occurred. Otherwise,
* it will loop.
*/
inotify_loop_with_timeout :: !(Maybe Int) !*(Inotify st) !*World
-> *(!*Inotify st, !*World)
/**
* inotify_loop_with_timeout with Nothing as timeout (will never return)
*
* @param The inotify file descriptor
* @param The World
* @result The parameters back, however, this function will never return.
*/
inotify_loop_forever :: !*(Inotify st) !*World -> *(!*Inotify st, !*World)
/*** Begin inotify.h ***/
//* Inotify event mask: file was accessed
IN_ACCESS :== 0x00000001
//* Inotify event mask: file was modified
IN_MODIFY :== 0x00000002
//* Inotify event mask: metadata changed
IN_ATTRIB :== 0x00000004
//* Inotify event mask: file opened for writing was closed
IN_CLOSE_WRITE :== 0x00000008
//* Inotify event mask: file not opened for writing was closed
IN_CLOSE_NOWRITE :== 0x00000010
//* Inotify event mask: file was opened
IN_OPEN :== 0x00000020
//* Inotify event mask: file was moved from watched directory
IN_MOVED_FROM :== 0x00000040
//* Inotify event mask: file was moved to watched directory
IN_MOVED_TO :== 0x00000080
//* Inotify event mask: file was created in watched directory
IN_CREATE :== 0x00000100
//* Inotify event mask: file in watched directory was deleted
IN_DELETE :== 0x00000200
//* Inotify event mask: watched file was deleted
IN_DELETE_SELF :== 0x00000400
//* Inotify event mask: watched file was moved
IN_MOVE_SELF :== 0x00000800
//* Inotify event mask: backing fs of watched file was unmounted
IN_UNMOUNT :== 0x00002000
//* Inotify event mask: the inotify event queue overflowed
IN_Q_OVERFLOW :== 0x00004000
/**
* Inotify event mask: the watch has been removed, either through
* inotify_rm_watch or because it was deleted, the fs was unmounted, etc.
*/
IN_IGNORED :== 0x00008000
/**
* Inotify event mask: watched file was closed
* @type Int
*/
IN_CLOSE :== (IN_CLOSE_WRITE |- IN_CLOSE_NOWRITE)
/**
* Inotify event mask: a file was moved from or to a watched directory
* @type Int
*/
IN_MOVE :== (IN_MOVED_FROM |- IN_MOVED_TO)
//* Inotify event mask: only watch the path if it is a directory
IN_ONLYDIR :== 0x01000000
//* Inotify event mask: don't follow symlinks
IN_DONT_FOLLOW :== 0x02000000
//* Inotify event mask: stop watching files when they get unlinked
IN_EXCL_UNLINK :== 0x04000000
/**
* Inotify event mask: when adding a watch on a path for which a watch already
* exists, OR the new event mask with the old one instead of replacing it.
*/
IN_MASK_ADD :== 0x20000000
//* Inotify event mask: the event occurred against a directory
IN_ISDIR :== 0x40000000
//* Inotify event mask: monitor a watch only for one event, then remove it
IN_ONESHOT :== 0x80000000
/**
* Inotify event mask: OR of all events
* @type Int
*/
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)
/*** End inotify.h ***/
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