|Hi Dr Manhattan
Below code process each files in the /tmp directory. If any directory is inside the /tmp directory will not be processed
Add additional checking on file, like file size and readable permissions to avoid error.
opendir (DIR, $tmp_dir) or die $!;
while (my $file_name = readdir(DIR))
my $abs_path = $tmp_dir.$file_name;
unless(-d $abs_path) #Ignore if it is a directory
&Process_EachFile($abs_path); # Do call a function and process
+ each file
print "$abs_path is a directory\n";
my ($filename) = @_;
open (FH,'<',"$filename") or die $!;
#Read file content here and do your calculation.
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