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Using open() for IPC
       Perl's basic open() statement can also be used for unidirection
+al
...
               print;
           }
           close STATUS || die "bad netstat: $! $?";

use IPC::Open3;
 $pid = open3(\*WTRFH, \*RDRFH, \*ERRFH,
                           'some cmd and args', 'optarg', ...);