David Fox writes:
>
> Grant Edwards writes:
>
> > How do I do the equivalent of the unix system call sleep(howManySeconds)?
>
> I'm guessing, so I can be corrected, but how about
>
> (define (sleep seconds)
> (system (string-append "sleep ") (number->string seconds)))
I thought about that, but it seems a tad wasteful to fork a process
and load a shell just to sleep for a second or two. I ended up just
waiting for the user to click a button to continue rather than waiting
for a fixed amount of time.
> What I've been wondering is where is the tcl "exec" function is,
> the one that returns a command's output in a string. I wrote
> a replacement that uses a temporary file, but is there something
> I'm missing something?
--
Grant Edwards
Rosemount Inc.
grante_at_rosemount.com
Received on Thu Sep 29 1994 - 06:55:52 CET