use strict;
use warnings;

use MCE::Loop;
use MCE::Shared;

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

tie my %result, 'MCE::Shared';

MCE::Loop->init(
   chunk_size  => 1,
   max_workers => 8,
);

MCE::Loop->run( sub {
  my $server = $_;
  MCE->say("child process running, with a key of $server ($$)");
  eval {
     local $SIG{ALRM} = sub { alarm 0; die "alarm\n" };
     alarm $timeout;
     $result{$server} = system("scp -p $file $user\@$server:$rpath/$fname");
  };
  alarm 0;
}, @servers );

MCE::Loop->finish;

for my $server ( sort keys %result ) {
  my ($status, $signum);

  $status = $result{$server};
  $signum = $status & 127;    # extract signal number
  $status = $status >> 8;     # becomes exit status

  print "$server: exit_status $status, signal_num $signum\n";
}