Re: What is the output port of `system*'?

[Diogo F. S. Ramos]

>> As an example of this behavior, I point to the following Racket program:
>>
>> #lang racket
>>
>> (define foo
>>   (with-output-to-string
>>     (lambda ()
>>       (system* (find-executable-path "ls") "/tmp"))))
>
> I agree that it would be nice to make this work as you expected.  In
> order to handle ports that are not simply raw POSIX file descriptors
> (e.g. string ports), we'd need to create a pipe behind the scenes, and
> arrange for thread(s) in the current process to copy data between the
> pipe(s) and the Scheme port.
>
> I'd like to do this at some point, although for the sake of backward
> compatibility we'd probably have to leave 'system' and 'system*' as-is
> and create a new API that works more intuitively.

If you do, may I suggest taking a look at Racket's Processes?

I'm not aware of things like "custodian" or "synchromizable event" in
Guile, but I've used Racket's Processes successfully in the past.