-;;; -*- mode: lisp; syntax: common-lisp; coding: utf-8; package: cl-inotify; -*-
+;;; -*- mode: lisp; syntax: common-lisp; coding: utf-8-unix; package: cl-inotify; -*-
;; Copyright (c) 2011-12, Olof-Joachim Frahm
;; All rights reserved.
(in-package #:cl-inotify)
+(eval-when (:compile-toplevel :load-toplevel :execute)
+ (when (boundp 'in-cloexec)
+ (pushnew 'inotify1 *features*)))
+
+#+cl-inotify::inotify1
(defbitfield (inotify1-flag :int)
(:cloexec #.in-cloexec)
(:nonblock #.in-nonblock))
(defsyscall inotify-init :int
"Initialises a new inotify event queue.")
+#+cl-inotify::inotify1
(defsyscall inotify-init1 :int
"Initialises a new inotify event queue and passes some flags along."
(flags inotify1-flag))
(defsyscall inotify-add-watch :int
- "Watches a path on a event queue."
+ "Watches a path on an event queue."
(fd :int)
(pathname :string)
(mask inotify-flag))
(defsyscall inotify-rm-watch :int
- "Removes a watched path from a event queue."
+ "Removes a watched path from an event queue."
(fd :int)
(wd :int))
(unwind-protect
;; file descriptor is collected with auto-close
(progn
- (setf fd (inotify-init1 (and (setf non-block nonblocking)
- :nonblock)))
+ (setf non-block nonblocking)
+ #+inotify1
+ (setf fd (inotify-init1 (and non-block :nonblock)))
+ #-inotify1
+ (setf fd (inotify-init))
+ #-inotify1
+ (when non-block
+ (set-nonblocking fd T))
(setf stream
;; TODO: what about the blocking?
#-(or clisp sbcl)
(defmacro do-events ((var inotify &key blocking-p) &body body)
"Loops BODY with VAR bound to the next events retrieved from INOTIFY.
The macro uses NEXT-EVENT, so reading an event won't block and the loop
-terminates if no events are available."
+terminates if no events are available. If BLOCKING-P is set, the loop
+blocks if no events are available, otherwise it exits as soon as no
+events were encountered."
(check-type var symbol)
(let ((inotify-sym (gensym)))
`(loop
(defmacro with-unregistered-inotify ((inotify &optional (nonblocking T) &rest rest) &body body)
"Like WITH-INOTIFY, but uses MAKE-UNREGISTERED-INOTIFY and WATCH-RAW
instead. Useful if you need to monitor just a fixed set of paths."
- `(let* ((,inotify (make-unregistered-inotify ,nonblocking)))
+ `(let ((,inotify (make-unregistered-inotify ,nonblocking)))
(unwind-protect
(progn
,.(mapcar (lambda (specifier)
`(watch-raw ,inotify ,@specifier))
rest)
+ (values)
,@body)
(close-inotify ,inotify))))
Since the QUEUE is closed on unwinding, this macro doesn't bother with
UNWATCH calls on all WATCHed paths."
- `(let* ((,inotify (make-inotify ,nonblocking)))
+ `(let ((,inotify (make-inotify ,nonblocking)))
(unwind-protect
(progn
,.(mapcar (lambda (specifier)
`(watch ,inotify ,@specifier))
rest)
+ (values)
,@body)
(close-inotify ,inotify))))
-
-;; TODO: what about other implementations?
-#+sbcl
-(defmacro with-inotify-event-handler ((inotify
- &optional (nonblocking T) (registered T)
- &rest rest)
- event-handler
- &body body)
- "Registers an INOTIFY queue and runs EVENT-HANDLER with it as only
-parameter whenever input happens while the BODY is executed.
-
-Other parameters are passed to WITH-(UNREGISTERED)-INOTIFY depending on the
-value of REGISTERED (default T)."
- (let ((handle (gensym "HANDLE")))
- `(,(if registered 'with-inotify 'with-unregistered-inotify)
- (,inotify ,nonblocking ,@rest)
- (sb-sys:with-fd-handler
- ((inotify-fd ,inotify)
- :input
- (lambda (,handle)
- (declare (ignore ,handle))
- (funcall ,event-handler ,inotify)))
- ,@body))))
-
-(defun run-inotify-program (program args rest directories flags
- &key function (wait T) event-handler (registered T))
- "Runs a program and records all matched events in all DIRECTORIES using
-FLAGS. If EVENT-HANDLER is set, it is instead called with every available
-event.
-
-PROGRAM, ARGS and REST are the arguments to SB-EXT:RUN-PROGRAM. REST is
-passed on verbatim except for the WAIT parameter, which is set to false.
-
-PROGRAM may also be a FUNCTION, in which case it is called with
-\(ARGS . REST) as arguments and has to return a process object like from
-SB-EXT:RUN-PROGRAM. The process also shouldn't be spawned with WAIT set.
-
-DIRECTORIES is a list of directory arguments for WATCH/-RAW.
-
-WAIT is only valid if FUNCTION is set. If it is true, after FUNCTION has
-returned, we wait until the process has quit.
-
-On supported implementations (SBCL) the FUNCTION parameter may be used to
-do some work while the program is running and watched by the inotify queue.
-It is called with the process object and the inotify queue as arguments."
- (let (events)
- (labels ((run ()
- (typecase program
- (function (apply program args rest))
- (T
- (apply #'sb-ext:run-program program args :wait NIL rest))))
- (events (inotify)
- (do-events (event inotify)
- (if event-handler
- (funcall event-handler event)
- (push event events))))
- (body (inotify)
- (unwind-protect
- (progn
- (let ((register (if registered #'watch #'watch-raw)))
- (mapcar (lambda (directory)
- (funcall register inotify directory flags))
- directories))
- (let ((process (run)))
- (if function
- (unwind-protect
- (funcall function process inotify)
- ;; wait in any case so catching the files will work
- (when wait
- (sb-ext:process-wait process)))
- (loop
- while (sb-ext:process-alive-p process)
- do (events inotify)
- finally (return (if event-handler
- process
- (values (nreverse events) process)))))))
- (close-inotify inotify))))
- (let ((inotify (if registered (make-inotify) (make-unregistered-inotify))))
- (if function
- #-sbcl
- (error "the FUNCTION parameter is only supported on SBCL for now")
- #+sbcl
- (sb-sys:with-fd-handler
- ((inotify-fd inotify)
- :input
- (lambda (handle)
- (declare (ignore handle))
- (events inotify)))
- (body inotify))
- (body inotify))))))
projects / cl-inotify.git / blobdiff