use strict;
use warnings;

use Parallel::ForkManager;

my @servers = ('a'..'z');
my $timeout = 10;
my $user    = "foo";
my $file    = "/tmp/hello.txt";
my $rpath   = "/tmp";
my $fname   = "hello.txt";

my $fork_manager = Parallel::ForkManager->new(8);

$fork_manager->set_waitpid_blocking_sleep(0);

foreach my $server (@servers) {
  my $pid = $fork_manager->start;
  if ($pid) {
    # parent
    print "$$: child process started, with a key of $server ($pid)\n";
  }
  else {
    # child
    eval {
       local $SIG{ALRM} = sub { alarm 0; die "alarm\n" };
       alarm $timeout;
       my $rc = system("scp -p $file $user\@$server:$rpath/$fname");
    };
    alarm 0;
    $fork_manager->finish;
  }
}

$fork_manager->wait_all_children();