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  1. or download this
    open my $pipe,'run.bat |' or die "Ooops: $!";
while (my $line=<$pipe>) {
    print $line; # <-- stupid example
}
close $pipe;
  2. or download this
    open my $pipe,'run.bat 2>&1 |' or die "Ooops: $!"; 
# ...
  3. or download this
    open my $pipe,'run.bat 2>&1 >nul |' or die "Ooops: $!"; 
# ...
  4. or download this
    open my $pipe,'java.exe -jar jarfile.jar arg1 arg2 |' or die "Ooops: $
+!";
# ...