fs_usage(1) on macOS
The text 01cdbd38a2dd, as Mac OS X 10.3.9, Mac OS X 10.3.8, Mac OS X 10.3.7, Mac OS X 10.3.6, Mac OS X 10.3.5, Mac OS X 10.3.4, Mac OS X 10.3.3, Mac OS X 10.3.2, Mac OS X 10.3.1, Mac OS X 10.3 shipped it.
report system calls and page faults related to filesystem activity in real-time
Flags it lists
-
-e -
-f -
-w