Plan 9 from Bell Labs’s /usr/web/sources/plan9/sys/src/ape/cmd/expr
--rw-rw-r-- glenda sys 5394 Feb 28 2002 expr.y --rw-rw-r-- glenda sys 144 Feb 28 2002 mkfile --rw-rw-r-- glenda sys 5958 Feb 28 2002 regexp.h
