If your process isn't a child of your script, no. I think it depends heavily on the operating system running, too.

The easiest way I think of on Unix systems is something like this :

use strict;
use warnings;

sub get_childpids {
    my $father=shift;
    # linux style
    my @exec=`ps -o pid --ppid $father` or die "can't run ps! $! \n";
    # SYS V style : use shell, needs cleansing
    # my @exec=`ps -eo ppid | grep $father` or die "can't run ps! $! \
+n";
    # BSD style : use shell, needs cleansing
    # my $exec=`ps aux | grep $father` or die "can't run ps! $! \n";
    shift  @exec;
    chomp @exec;
        return @exec;
}
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