su(1) on macOS
The text 77d0754c1610, as Mac OS X 10.1.5, Mac OS X 10.1.4, Mac OS X 10.1.3, Mac OS X 10.1.2, Mac OS X 10.1.1, Mac OS X 10.1, Mac OS X 10.0.4, Mac OS X 10.0 shipped it.
substitute user identity
Flags it lists
-
-K -
-f -
-l -
-m