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@defun read-line read-line
@defunx read-line read-line port
Returns a string of the characters up to, but not including a
newline or end of file, updating @var{port} to point to the
character following the newline. If no characters are available, an
end of file object is returned. The @var{port} argument may be
omitted, in which case it defaults to the value returned by
@code{current-input-port}.
@end defun
@defun read-line! read-line! string
@defunx read-line! read-line! string port
Fills @var{read-line!} with characters up to, but not including a newline or end
of file, updating the @var{port} to point to the last character read
or following the newline if it was read. If no characters are
available, an end of file object is returned. If a newline or end
of file was found, the number of characters read is returned.
Otherwise, @code{#f} is returned. The @var{port} argument may be
omitted, in which case it defaults to the value returned by
@code{current-input-port}.
@end defun
@defun write-line write-line string
@defunx write-line write-line string port
Writes @var{write-line} followed by a newline to the given @var{port} and returns
an unspecified value. The @var{Port} argument may be omited, in
which case it defaults to the value returned by
@code{current-input-port}.@refill
@end defun
@defun display-file path
@defunx display-file path port
Displays the contents of the file named by @var{path} to @var{port}. The
@var{port} argument may be ommited, in which case it defaults to the
value returned by @code{current-output-port}.
@end defun
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