FSEvents
The FSEvents API in macOS allows applications to register for notifications of changes to a given directory tree.[1] Whenever the filesystem is changed, the kernel passes notifications via the special device file /dev/fsevents to a userspace process called fseventsd. This process combines multiple changes to a single directory tree that occur within a short period of time, then notifies applications that have registered for changes to the affected directory.[2]
Until Mac OS X 10.7, FSEvents did not "watch" the filesystem, such as Linux's inotify: the API provided no notifications for changes to individual files. An application was able to register to receive changes to a given directory, and had to determine for itself which file or files were changed.[3]
Mac OS X 10.7 (Lion) added the ability to register for file modification notifications.[4]
See also
References
- ↑ "Leopard Technology Series for Developers: OS Foundations". 2007-10-26. https://developer.apple.com/leopard/overview/osfoundations.html. Retrieved 2008-08-21.
- ↑ "File System Events Programming Guide: Using the File System Events API". 2012-12-13. https://developer.apple.com/library/content/documentation/Darwin/Conceptual/FSEvents_ProgGuide/UsingtheFSEventsFramework/UsingtheFSEventsFramework.html. Retrieved 2017-10-13.
- ↑ "FSEvents.h -- FSEventStreamCallback". 2011-05-05. https://developer.apple.com/library/mac/#documentation/Darwin/Reference/FSEvents_Ref/FSEvents_h/index.html#//apple_ref/c/tdef/FSEventStreamCallback. Retrieved 2011-08-16.
- ↑ "FSEvents reference -- kFSEventStreamCreateFlagFileEvents". https://developer.apple.com/documentation/coreservices/1455376-fseventstreamcreateflags/kfseventstreamcreateflagfileevents. Retrieved 2017-10-13.
External links
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