shell> brew install fswatch
參考網站：
inotify-tools
inotifywait - wait for changes to files using inotify
shell> brew install fswatch
inotifywait
最简单的调用是inotifywait -r -m，它循环监控参数(-r)，并使该实用程序在每个事件(-m)之后保持运行：
shell> inotifywait -r -m $HOME
Setting up watches. Beware: since -r was given, this may take a while!
Watches established.
cd $HOME touch a b c
shell> inotifywait -m -e CLOSE_WRITE $HOME --format "%w%f"
CLOSE_WRITE
$ inotifywait -m -e close_write /var/alarms --format "%w%f"