Perl SSH检查文件是否存在

我需要使用Net：：SSH远程检索文件，但是如果文件不存在，我的脚本就会失效。我怎样才能停止这一切，让脚本继续下去

eval {  
    my $login_output = $ssh->login($user, $pass);

    foreach $device (keys %{$deviceHashRef})
    {   
                    my $transfer_output = $scpe->scp("$host:/home/portal/runtime/portal_daemon/data/journal/2012.07/refrigeration.case.$device.hourly", '/tmp/poop/input');
    }
};

if($@)
{       
    print Dumper $@;
}

谢谢

---

Tom

如果将调用包装在eval{}中，它将捕获die（），您可以处理错误

 my $transfer_output = eval { $scpe->scp("$host:/home/portal/runtime/portal_daemon/data/journal/2012.07/refrigeration.case.$device.hourly", '/tmp/poop/input') };
 if ($@) {
   my $err = $@;

   # you can parse the error message out of $err and build an error message
   if ($err =~ /not found/) {
      logger->err('the input file was not found on the remote server');
   }
   else {
     logger->err("file copy encountered a problem: $err");
   }
 }