#!/usr/bin/perl -w
#
# DigiTemp remote system update script
# Copyright 1997-2001 by Brian C. Lane <bcl@brianlane.com> www.brianlane.com
# All Rights Reserved
#
# 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.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
# more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA
#

#
# Read the temperature logfile, write it to an include file for the webpage,
# then ftp the files to the destination server.
#
# The following perl extensions are required :
# libnet package from http://www.perl.com/CPAN-local/modules/by-module/Net/
#   I used libnet-1.0506.tar.gz
#
# Data-Dumper package from: CPAN/modules/by-module/Data/Data-Dumper-x.x.tar.gz
#   I used Data-Dumper-2.07.tar.gz

#
# Sensor #0 is the Window
# Sensor #1 is the inside of the Linux box
#
# Dec 18 21:46:47  Sensor 0 C: 8.81 F: 47.86
# Dec 18 21:46:47  Sensor 1 C: 26.41 F: 79.54
#
use Net::FTP;

# Include file for the webpage (included from the main page)
$inc_file = "/tmp/temp.inc";

# Temperature logfile updated by seperate DigiTemp daemon
$log_file = "/var/log/temperature";

# Script to run to bring up the link
# I use diald, you probably use something different.
$ip_up = "/usr/sbin/dialdc up";

# Your username for the destination ftp server
$ftp_user = "username";

# Your password for the destination ftp server
$ftp_pass = "password";

# Destination ftp server's address
$ftp_host = "ftp.host.com";

# Directory on the destination ftp server to place $inc_file
$dest_dir = "/home/login/public_html";

# Create a new include file, overwrite the old one
open( INCFILE, ">$inc_file") || die "Can't open $inc_file";

# Include a break line and center the text
print INCFILE "<HR>\n";
print INCFILE "<CENTER>\n";

# You should customize this!
print INCFILE "The current temperatures are<P>\n";

# Run tail -2 /var/log/temperature and parse the output
# The -2 is the number of sensors you have (last 2 lines from logfile)
open( TEMPLOG, "tail -2 $log_file |") || die "Can't fork: $!";

# Parse the output of the tail program
while( <TEMPLOG> )
{
  # Get the time and date, sensor number, temperature in c and f
  ($month,$day,$time,$d1,$sensor,$d1,$centigrade,$d1,$fahrenheight) = split( " ", $_ );

  # Print some custom messages for the sensors
  # The \xB0 is supposed to be a degree symbol. This works on some systems
  # but not on others.
  if( $sensor eq '0' )
  {
    print INCFILE "The modems are at $fahrenheight\xB0 F ($centigrade\xB0 C)<BR>\n";
  }

  if( $sensor eq '1' )
  {
    print INCFILE "The room is a ";

    if( $fahrenheight < 40.0 )
    {
      print INCFILE "freezing";
    }

    if( $fahrenheight >= 40.0 and $fahrenheight < 70.0 )
    {
      print INCFILE "chilly";
    }

    if( $fahrenheight >= 70.0 and $fahrenheight < 80.0 )
    {
      print INCFILE "comfortable";
    }

    if( $fahrenheight >= 80.0 and $fahrenheight < 100.0 )
    {
      print INCFILE "balmy";
    }

    if( $fahrenheight >= 100.0 )
    {
      print INCFILE "blistering";
    }

    print INCFILE " $fahrenheight\xB0 F ($centigrade\xB0 C)<BR>\n";
  }
}

print INCFILE "Last updated: $month $day $time<BR>\n";

# Blantant advertisement <G>
print INCFILE "<PRE>These temperatures generated with ";
print INCFILE "<A HREF=\"http://www.brianlane.com\">";
print INCFILE "DigiTemp</PRE><BR>\n";
print INCFILE "</CENTER>\n";

close( TEMPLOG );
close( INCFILE );

# Send it to the server
# Fire up the link
system $ip_up;

# Wait a little bit to let ppp0 come up
sleep 60;

# Send it to the server
$ftp = Net::FTP->new($ftp_host);
$ftp->login($ftp_user,$ftp_pass);
$ftp->cwd($dest_dir);
$ftp->binary();
$ftp->put($inc_file);
$ftp->quit;

# Shut down the link
system $ip_down;

# done!