Shell Programming and Scripting

#!/usr/bin/perl

use strict;
use warnings;

my $sizes = `du -x -sk @ARGV | sort -n`;
my $total = 0;

print "MegaBytes Name\n";
for(split /[\r\n]+/,$sizes)                     #split on one or more newline characters
{
        my($number,$file) = split /\t/,$_,2;    #split on tab ($file not used here)
        my $number1 = sprintf ("%9.2f",$number / 1024);
        printf "$number1 $file\n";
        $total += $number;
}

printf ("TOTAL: %9.2f\n",$total / 1024);

#!/usr/bin/perl 
    use strict;
	sub numeric;
	sub to_date;
	my @filelist = ();
	my @sortarray = ();
	my $idx = 0;
	my $value = "";
	my $file = "";
	opendir(DIR, "..") || die "can't open $!\n";
	@filelist = readdir(DIR);
	closedir(DIR);

	$idx = 0;
	@sortarray = ();
	foreach $file ( @filelist )
	{
		$sortarray[$idx] = sprintf("%d %s", (stat "../$file")[9], $file);
		$idx++;
	}

	@filelist = sort numeric @sortarray ;
    print "@filelist\n";
	foreach $value ( @filelist )
	{
		print &to_date( $value );
	}

	sub numeric { my @one = split(' ', $a);
		          my @two = split(' ', $b); 
		          return $one[0] <=> $two[0];
		        }
	sub to_date {
		 my @months = ();
		 my $filename = "";
		 my $mtime = 0;
		 my $sec = 0; 
		 my $min = 0; 
		 my $hr = 0;
		 my $mday = 0; 
		 my $mon = 0; 
		 my $yr = 0; 
		 my $wday = 0; 
		 my $yday = 0; 
		 my $dntcare =0;
		 my $retval = "";
		 
		 @months = qw(Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec);

         ($mtime, $filename) = split(' ', $_[0]);	     
	     ($sec, $min, $hr, $mday, $mon, $yr, $wday, $yday, $dntcare) =
	         localtime($mtime);
	     $retval = sprintf( "%-10s %3s %02d %4d %02d:%02d:%02d\n",
	         $filename, $months[$mon], $mday, $yr + 1900, $hr, $min, $sec );

         return $retval;
	}