c:\test>type temp.pl
#! perl -sw
use strict;
my $filename = 'This_filename_has_2  2_spaces.txt';
my $tempstr = "echo \"$filename\" |";
printf "Below is the output of \'$tempstr\'\n";
open (IN,$tempstr) or die "Failed to echo $filename!\n";
printf "\t";
printf <IN>;
close (IN);

c:\test>temp.pl
Below is the output of 'echo "This_filename_has_2  2_spaces.txt" |'
        "This_filename_has_2  2_spaces.txt"

c:\test>