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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