this post was submitted on 03 May 2024
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everything is a file, except when it's not.
Everything is represented by a file, doesn't mean you can open it with a text editor.
More like file descriptor. File path is like address system, but it's not how you get all file descriptors. For example: sockets (there is bash's fake /dev/{tcp,udp}), epoll, timer, event, inotify.
In UNIX systems event systems have a list of filedescriptors with a callback for each. You could have your event loop an epoll fd itself and nest it in another.