For all your portable CL raw POSIX I/O needs!
We export three simple symbols: with-raw-io, read-char, and read-line.
Obviously, read-char and read-line shadow the existing CL symbols. We simply call them inside with-raw-io.
with-raw-io is a macro which takes a &body and executes BODY with IO in non-canonical mode by modifying POSIX termios settings, then restores the previous settings.
At this time, trivial-raw-io has been tested on: SBCL, CCL, CMUCL, and CLISP. All testing has been done on Linux.