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I'm not sure - sleep without an argument sleeps forever (until a signal comes in). So the intent of the statement is - if we have too many processes, pause. When SIGCHLD comes in, we are awakened,...

Ah! It never occurred to me that I could use ps to check if workers were still running. That looks pretty good. And it looks like it will work just as well in ksh, too.

I'll give it a try. Thanks...

Ah, thanks! Yes, you're right that is an issue.

I'll have a look at fixing this, I can probably also do it with a SIGCHLD handler I guess.

Paul.

I tried seeing what I could do with Perl, and I got this, which seems to work:
#!/usr/bin/perl
sub spawn {
$pid = fork;
unless ($pid) {
exec "@_";
}
$pid
}
@pids =...

I tried a perl solution and got really bogged down because I couldn't find an easy way of running a background command (disclaimer: it's a VERY long time since I used perl, but I don't have Python on...

Thanks, that's an approach I hadn't thought of. One thing it doesn't allow me to do is to report progress - something I'd thought of adding to my original approach was to add a "printf '.'" whenever...

Hi,
I'm trying to write a script to decompress a directory full of files. The decompression commands can run in the background, so that many can run at once. But I want to limit the number running...