Thanks Matthew,
now the problem moved to converting the simple "system" procedure to
not-so-simple "subprocess" procedure. My poor little non-programmer brain
overloaded after seeing the following :)
---
(subprocess stdout
stdin
stderr
command
arg ...)
→
subprocess?
(or/c (and/c input-port? file-stream-port?) #f)
(or/c (and/c output-port? file-stream-port?) #f)
(or/c (and/c input-port? file-stream-port?) #f)
stdout : (or/c (and/c output-port? file-stream-port?) #f)
stdin : (or/c (and/c input-port? file-stream-port?) #f)
stderr : (or/c (and/c output-port? file-stream-port?) #f)
command : path-string?
arg : string?
(subprocess stdout
stdin
stderr
command
exact
arg)
→
subprocess?
(or/c (and/c input-port? file-stream-port?) #f)
(or/c (and/c output-port? file-stream-port?) #f)
(or/c (and/c input-port? file-stream-port?) #f)
stdout : (or/c (and/c output-port? file-stream-port?) #f)
stdin : (or/c (and/c input-port? file-stream-port?) #f)
stderr : (or/c (and/c output-port? file-stream-port?) #f)
command : path-string?
exact : 'exact
arg : string?
---
An example in the documentation would be helpful. I often find them easier to
follow.
I can't seem to initiate an OS thread anymore, and instead mapping a single
thread identifier to a variable, there are now four outputs to joggle with.
Any further tips
1) converting system->subprocess so that the custodian process would print out
both output and errors?
2) capturing the subrocess identifier so that I have something to kill? :)
br, jukka
> -----Original Message-----
> From: Matthew Flatt [mailto:mfl...@cs.utah.edu]
> Sent: 18 March 2011 13:53
> To: Jukka Tuominen
> Cc: users@racket-lang.org
> Subject: Re: [racket] racket and OS threads
>
>
> At Fri, 18 Mar 2011 13:40:02 +0200, "Jukka Tuominen" wrote:
> > (define loop
> > (lambda ()
> > (set! thread:child (thread (lambda () (system "gracket -f
> > \""...rlt\""))))
> > (sleep 30)
> > (kill-thread thread:child)
> > (loop)))
> >
> >
> > But, eventhough the racket process ends as expected, the OS
> process still
> > stays alive.
> >
> > Is there a way to kill the OS process as well?
>
> See `current-subprocess-custodian-mode'.
>
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