Plan 9 from Bell Labs’s /usr/web/sources/contrib/gabidiaz/root/sys/src/cmd/perl/h2pl/tcbreak
#!/usr/bin/perl require 'cbreak.pl'; &cbreak; $| = 1; print "gimme a char: "; $c = getc; print "$c\n"; printf "you gave me `%s', which is 0x%02x\n", $c, ord($c); &cooked;