Thanks Adam,

I was wondering then, what would be a better way to do this -

(with-output-to-file "output.txt"

(lambda ()

(display

(call-with-input-process

program

(lambda (port)

(read-line port #f))))))

If I understand it right, this requires an extra read and write. If Gambit lets the port be overridden by the surrounding with-output-to-file, perhaps the whole thing could be achieved without the extra read and write. Hence my question was more about whether there is a problem with this approach that I am not able to see.

Regards,

Kashyap

On Tue, Mar 20, 2018 at 5:26 PM, Adam <adam.mlmb@gmail.com> wrote:

2018-03-21 1:54 GMT+08:00 C K Kashyap <ckkashyap@gmail.com>:
Got it - so if I have to redirect to a file, I could do this -
(with-output-to-file "output.txt"
(lambda ()
(display
(call-with-input-process
program
(lambda (port)
(read-line port #f))))))

Although, I'd like to understand why stdout-redirection: #f outputs to stdout and not the current output port.

Stdout is the current output port of the host OS environment, so this argument specifies that Gambit should leave it untouched.

Is that a problem?

That depends on you.