Returns the next character from the input file attached to FILEHANDLE,
or the undefined value at end of file or if there was an error (in
the latter case
is set). If FILEHANDLE is omitted, reads from
STDIN. This is not particularly efficient. However, it cannot be
used by itself to fetch single characters without waiting for the user
to hit enter. For that, try something more like:
Determination of whether $BSD_STYLE should be set is left as an exercise to the reader.
function can do this more portably on
systems purporting POSIX compliance. See also the
module from your nearest CPAN site.