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  1. or download this
    open (SAVEOUT, ">&STDOUT") or die "Unable to copy STDOUT : $!";
open (STDOUT, ">stdout") or die "Unable to open new STDOUT : $!";
select STDOUT;
$| = 1;
  2. or download this
    open (SAVEERR, ">&STDERR") or die "Unable to copy STDERR : $!";
open (STDERR, ">stderr") or die "Unable to open new STDOUT : $!";
...
$| = 1;
select STDOUT;
  3. or download this
    open (STDINCLONE, "<stdout") or die "Unable to open first process's ST
+DOUT : $!";
  4. or download this
    open (ERRORS,"<stderr") or die "Unable to open first process's STDERR 
+: $!";