I'm not 100% sure about what's required on Windows. What may work is to set $SIG{INT} to "IGNORE" before spawning the children. Note that when you do so, your process won't be killed by ctrl-C, either - you'll just keep going.

Another option may be to fork/exec yourself instead of using system, and in the "child" process, do the above - that way the parent process will still be killable partway through while the children will continue to live on their own, e.g.: 

for ($x=0; $x < scalar(@files); $x++ ) {
    $file=@files[$x];
    chomp $file;
    $cmd="clone -F $file ";
    print "Launching Command is: $cmd\n";
    my $pid = fork;
    if ($pid) {
        # parent
    } elsif (defined $pid) {
        $SIG{INT} = 'IGNORE';
        exec($cmd);
    } else {
        die "fork failed.";
    }
}

[download]
This variation you can still hit Ctrl-C to kill the parent, but the children will inherit the ignore status on the signal handler and keep going. (This can also be done in the on_prepare callback in AnyEvent::Util::run_cmd.)

Finally, if you have control over the clone command, you can have that program ignore the INT signal.

In reply to Re^3: Multiple system commands in parallel by Tanktalus
in thread Multiple system commands in parallel by g_speran

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