#!/usr/bin/perl

###############################################################################
#                                                                             #
#  Name   : summing_dir                                                       #
#  Author : Chris Koeritz                                                     #
#  Rights : Copyright (C) 2000-$now by Author                                 #
#                                                                             #
#  Purpose:                                                                   #
#                                                                             #
#    Provides a somewhat stylized directory lister.                           #
#                                                                             #
###############################################################################
#  This program is free software; you can redistribute it and/or modify it    #
#  under the terms of the GNU General Public License as published by the Free #
#  Software Foundation; either version 2 of the License or (at your option)   #
#  any later version.  See: "http://www.gruntose.com/Info/GNU/GPL.html" for a #
#  version of the License.  Please send any updates to "fred@gruntose.com".   #
###############################################################################

require "filename_helper.pl";
require "importenv.pl";

local($chewed_line) = "";
local(@arg_list);
local($print_list) = "";

# if there were no parameters, we make the default listing for the current
# directory.
if ($#ARGV < 0) {
  $print_list = "Current Directory";
  @arg_list = ( "." );
} else {
  local(@munged_list) = &patch_name_for_pc(&remove_trailing_slashes(@ARGV));
  $print_list = "@munged_list";
  @arg_list = &glob_list(@ARGV);
}

foreach $dir (@arg_list) {
  $chewed_line = $chewed_line . " \"$dir\"";
}

if ("$chewed_line" eq "") {
  print "No files matched that path specification.\n";
  exit 0;
}

# show the header, now that we know there's something to print.
print "[" . $print_list . "]\n\n";

##print "chewed_line is: $chewed_line\n";

local($temp_file)=`mktemp "$TMP/zz_frdsumdir.XXXXXX"`;
chop($temp_file);

system("ls -lF $chewed_line >$temp_file");

##print "file is: $temp_file\n";

# drop the main payload, the list of directory info.
system("cat $temp_file");

local($lengths) = 0;

# open the file and process the lines to get file lengths.
open(DIRLIST, "<$temp_file");
foreach $file_line (<DIRLIST>) {
  (local $munged = $file_line) =~ s/^[^ ]* *[^ ]* *[^ ]* *[^ ]* *([0-9]+).*$/\1/;
#  print "munge=$munged\n";
  $lengths += $munged;
}
close(DIRLIST);
unlink($temp_file);  # clean up.

#print "lens are: $lengths\n";

local($total)=$lengths;
local($kbytes)=int($total / 102.4) / 10;
local($mbytes)=int($kbytes / 102.4) / 10;

print "\n";
print "These files occupy $total bytes ($kbytes KB / $mbytes MB).\n";
print "Overall Drive Usage (megs):\n";

system("df -m $chewed_line >$temp_file");

# now eat the file again, but this time to get drive space info.
open(DIRLIST, "<$temp_file");
local($space_info) = "";
local($did_title) = 0;  # true if we have printed the title by now.
foreach $file_line (<DIRLIST>) {
  ($space_info = $file_line) =~ s/[^ ]* *([^ ]*) *([^ ]*) *([^ ]*) *([^ ]*) *.*$/\1	\2	\3	\4/;
  if (!$did_title) {
    # if the title hasn't been printed yet, we take some of the info out of
    # the line and use it for the right sense of the last column.
    print "Total	Used	Free	";
    $space_info =~ s/[^	]*	*[^	]*	*[^	]*	*([^	]*)/\1/;
    print "$space_info";
    $did_title = 1;
  } else {
  }
}
close(DIRLIST);
unlink($temp_file);  # clean up.

print "$space_info\n";

exit 0;