#! /usr/bin/perl -w

# -*- mode: cperl -*-

###################################################################

# MRTG 2.17.7  Multi Router Traffic Grapher

###################################################################

# Created by Tobias Oetiker <tobi@oetiker.ch>

#            and Dave Rand <dlr@bungi.com>

#

# For individual Contributers check the CHANGES file

#

###################################################################

#

# Distributed under the GNU General Public License

#

###################################################################

my @STARTARGS=($0,@ARGV);

@main::DEBUG=qw();

# DEBUG TARGETS

# cfg  - watch the config file reading

# dir  - directory mangeling

# base - basic program flow

# tarp - target parser

# snpo - snmp polling

# snpo2 - more snmp debug

# coca - confcache operations

# repo - track confcache repopulation

# fork - forking view

# time - some timing info

# log  - logging of data via rateup or rrdtool

# eval - trace eval experssions

# prof - add timeing info some interesting bits of code

$main::GRAPHFMT="png";

# There older perls tend to behave peculiar with

# large integers ...

require 5.005;

use strict;

# addon jpt

BEGIN {

    # Automatic OS detection ... do NOT touch

    if ( $^O =~ /^(ms)?(dos|win(32|nt)?)/i ) {

	$main::OS = 'NT';

	$main::SL = '\\';

	$main::PS = ';';        

    } elsif ( $^O =~ /^NetWare$/i ) {

	$main::OS = 'NW';

	$main::SL = '/';

	$main::PS = ';';

    } elsif ( $^O =~ /^VMS$/i ) {

	$main::OS = 'VMS';

	$main::SL = '.';

	$main::PS = ':';

    } elsif ( $^O =~ /^os2$/i ) {

	$main::OS = 'OS2';

	$main::SL = '/';

	$main::PS = ';';

    } else {

	$main::OS = 'UNIX';

	$main::SL = '/';

	$main::PS = ':';

    }

    if ( $ENV{LANG} and $ENV{LANG} =~ /UTF.*8/i ){        

        my $args = join " ", map { /\s/ ? "\"$_\"" : $_ } @ARGV;

        $args ||= "";

        print <

-----------------------------------------------------------------------

ERROR: Mrtg will most likely not work properly when the environment

       variable LANG is set to UTF-8. Please run mrtg in an environment

       where this is not the case. Try the following command to start:

       env LANG=C ${0} $args 

-----------------------------------------------------------------------

ERR

        exit 0;

    }

}

use FindBin;

use lib "${FindBin::Bin}";

use lib "${FindBin::Bin}${main::SL}..${main::SL}@@lib@@${main::SL}mrtg2";

use Getopt::Long;

use Math::BigFloat;

# search for binaries in the bin and bin/../lib  directory

use MRTG_lib "2.100016";

my $NOW = timestamp;

my $graphiteObj;

# $SNMP_Session::suppress_warnings = 2;

use locales_mrtg "0.07";

# Do not Flash Console Windows for the forked rateup process 

BEGIN {

    if ($^O eq 'MSWin32'){

	eval {local $SIG{__DIE__};require Win32; Win32::SetChildShowWindow(0)};

	warn "WARNING: $@\n" if $@;

    }    

}

$main::STARTTIME = time;

%main::verified_rrd = ();

if ($MRTG_lib::OS eq 'OS2') {

# in daemon mode we will pause 3 seconds to be sure that parent died

  require OS2::Process;

  if (OS2::Process::my_type() eq 'DETACH') {sleep(3);}

}

if ($MRTG_lib::OS eq 'UNIX') {

   $SIG{INT} = $SIG{TERM} = 

           sub {   unlink ${main::Cleanfile} 

                       if defined $main::Cleanfile;

                   unlink ${main::Cleanfile2}

                       if defined $main::Cleanfile2;

                   unlink ${main::Cleanfile3}

                       if defined $main::Cleanfile3;

                   warn "$NOW: ERROR: Bailout after SIG $_[0]\n";

                   exit 1;

                };

  $SIG{HUP} = sub {

                   unlink ${main::Cleanfile} 

                       if defined $main::Cleanfile;

                   unlink ${main::Cleanfile2}

                       if defined $main::Cleanfile2;

                   unlink ${main::Cleanfile3}

                       if defined $main::Cleanfile3;

                   die "$NOW: ERROR: Bailout after SIG $_[0]\n";

                };

}

END {

    local($?, $!);

    unlink ${main::Cleanfile} if defined $main::Cleanfile;

    unlink ${main::Cleanfile2} if defined $main::Cleanfile2;

}

&mai;;

exit(0);

#### Functions ################################################

sub main {

    # read in the config file

    my @routers;

    my %cfg;

    my %rcfg;

    my %opts; 

    my $EXITCODE = 0;

    GetOptions(\%opts, 'user=s', 'group=s', 'lock-file=s','confcache-file=s','logging=s', 'check', 'fhs', 'daemon',  'pid-file=s','debug=s', 'log-only') or die "Please use valid Options\n";

    if (defined $opts{debug}){

        @main::DEBUG = split /\s*,\s*/, $opts{debug};

	if (defined $SNMP_util::Debug){

	        $SNMP_util::Debug = 1 if grep /^snpo2$/, @main::DEBUG;

	}

    }

    if (grep /^prof$/, @main::DEBUG){

	require Time::HiRes;

        eval "sub gettimeofday() {return Time::HiRes::time()}";

	# note this will crash if the module is missing

	# so only use the --debug=prof if you have Time::HiRes installed

    } else {

	eval "sub gettimeofday() {return time()}";

    }

    debug 'time', "prog start ".localtime(time);

    my $uid = $<;

    my $gid = $(;

    if (defined $opts{group}) {

        $gid = getgrnam($opts{group});

        die "$NOW: ERROR: Unknown Group: $opts{group})\n" if not defined $gid;

    }

    if (defined $opts{user}) {

        $uid = getpwnam($opts{user});

        die "$NOW: ERROR: Unknown User: $opts{user})\n" if not defined $uid;

    }

    # If we've specified using FHS (http://www.pathname.com/fhs/) on the command line,

    # use the relevant path definitions (can be overridden later):

    my $confcachefile;

    my $pidfile;

    my $lockfile;

    my $templock;

    my $logfile;

    if (defined $opts{"fhs"}) {

	$confcachefile = "/var/cache/mrtg/mrtg.ok";

	$pidfile = "/var/run/mrtg.pid";

	$lockfile = "/var/cache/mrtg/mrtg.lck";

	$templock = "/var/cache/mrtg/mrtg.lck.$$";

	$logfile = "/var/log/mrtg.log";

    }	

    my $cfgfile = shift @ARGV;

    if ( !defined $cfgfile and -r "/etc/mrtg.cfg" ) { $cfgfile = "/etc/mrtg.cfg"; }

    printusage() unless defined $cfgfile;

    # PID file code, used later if daemonizing...

    if ( !defined($pidfile) ) {

        $pidfile =  $cfgfile;

        $pidfile =~ s/\.[^.\/]+$//;

        $pidfile .= '.pid';

    }

    $pidfile =  $opts{"pid-file"} || $pidfile;

    # Run as a daemon, specified on command line (required for FHS compliant daemon)

    if (defined $opts{"daemon"}) {

	# Create a pidfile, then chown it so we can use it once we change user

	&create_pid($pidfile);

	chown $uid, $gid, $pidfile;

    }

    ($(,$)) = ($gid,$gid) ;

    ($<,$>) = ($uid,$uid) ;

    die "$NOW: ERROR failed to set UID to $uid\n" unless ($< == $uid and  $> == $uid);

    $logfile = $opts{logging} || $logfile;

    if (defined $logfile){

	setup_loghandlers $logfile;

        warn "Started mrtg with config \'$cfgfile\'\n";

    }	

    # lets make sure that there are not two mrtgs running in parallel.

    # so we lock on the cfg file. Nothing fancy, just a lockfile

    $lockfile = $opts{"lock-file"} || $lockfile;

    if (! defined $lockfile) {

        $lockfile = $cfgfile."_l";

    }

    if (! defined $templock) {

        $templock = $lockfile."_" . $$ ;

    }

    debug('base', "Creating Lockfiles $lockfile,$templock");

    &lockit($lockfile,$templock);

    debug('base', "Reading Config File: $cfgfile");

    my $cfgfile_age = -M $cfgfile;

    readcfg($cfgfile,\@routers,\%cfg,\%rcfg);

    imggen($cfg{icondir} || $cfg{imagedir} || $cfg{workdir});

    # Enable or disable snmpv3

    if(defined $cfg{enablesnmpv3}) {

        $cfg{enablesnmpv3} = lc($cfg{enablesnmpv3});

    } else {

        $cfg{enablesnmpv3} = 'no';

    }

    if ($cfg{threshmailserver}) {

        if  (eval {local $SIG{__DIE__};require Net::SMTP;})   {

	    import Net::SMTP;

            debug('base', "Loaded Net::SMTP module for ThreshMail.");

        } else {

            die "$NOW: WARNING: Can't load Net::SMTP module. This is required for ThreshMail.";

        }

    }

    # Check we have the necessary libraries for IPv6 support

    if ($cfg{enablesnmpv3} eq 'yes') {

        if  (eval {local $SIG{__DIE__};require Net_SNMP_util;})   {

	    import Net_SNMP_util;

            debug('base', "SNMP V3 libraries found, SNMP V3 enabled.");

        } else {

            warn "$NOW: WARNING: SNMP V3 libraries not found, SNMP V3 disabled.\n";

            $cfg{enablesnmpv3} =  'no';

	    require SNMP_util;

	    import SNMP_util;

        }

    }

    else {	# load V1/V2 libraries 

	require SNMP_util;

	import SNMP_util;

    }

    # Enable or disable IPv6

    if(defined $cfg{enableipv6}) {

        $cfg{enableipv6} = lc($cfg{enableipv6});

    } else {

        $cfg{enableipv6} = 'no';

    }

    # Check we have the necessary libraries for IPv6 support

    if ($cfg{enableipv6} eq 'yes') {

        if ( eval {local $SIG{__DIE__};require Socket; require Socket6; require IO::Socket::INET6;}) {

            import Socket;

            import Socket6;

            debug('base', "IPv6 libraries found, IPv6 enabled.");

        } else {

            warn "$NOW: WARNING: IPv6 libraries not found, IPv6 disabled.\n";

            $cfg{enableipv6} =  'no';

        }

    }

    # Module invocation for sending a copy of the time series data to graphite.

    if(defined $cfg{sendtographite}) {

      require Net::Graphite;

    }

    # from our last run we kept some info about

    # the configuration of our devices around

    debug('base', "Reading Interface Config cache");

    $confcachefile =  $opts{"confcache-file"} || $confcachefile;

    if ( !defined($confcachefile) ) {

        $confcachefile = $cfgfile;

        $confcachefile  =~ s/\.[^.\/]+$//;

        $confcachefile .= ".ok";

    }

    my $confcache = readconfcache($confcachefile);

    # Check the config and create the target object

    debug('base', "Checking Config File");

    my @target;

    cfgcheck(\@routers, \%cfg, \%rcfg, \@target, \%opts);

    # exit here if we only check the config file

    # in case of an error, cfgcheck() already exited

    if (defined $opts{check}) {

        debug('base', "Remove Lock Files");

        close LOCK; unlink ($templock, $lockfile);

        debug('base', "Exit after successful config file check");

        exit 0;

    }

    # postload rrdtool support

    if ($cfg{logformat} eq 'rrdtool'){

        debug('base', "Loading RRD support");

	require 'RRDs.pm';

    }

    # set the locale

    my $LOC;

    if ( $cfg{'language'} and defined($lang2tran::LOCALE{"\L$cfg{'language'}\E"})) {

	debug('base', "Loading Locale for ".$cfg{'language'});

	$LOC=$lang2tran::LOCALE{"\L$cfg{'language'}\E"};

    } else {

	debug('base', "Loading default Locale");

	$LOC=$lang2tran::LOCALE{'default'};

    }

    # Daemon Code

    my $last_time=0;

    my $curent_time;

    my $sleep_time;

    if (defined $opts{"daemon"}) { $cfg{'runasdaemon'} = "yes"; }

    &demonize_me($pidfile,$cfgfile) if defined $cfg{'runasdaemon'}  and $cfg{'runasdaemon'} =~ /y/i  and $MRTG_lib::OS ne 'VMS'

    	and not (defined $cfg{'nodetach'} and $cfg{'nodetach'} =~ /y/i);

    # auto restart on die if running as demon

    $SIG{__DIE__} = sub {

        warn $_[0];

        warn "*** Restarting after 10 seconds in an attempt to recover from the error above\n";

        sleep 10;

        exec @STARTARGS;

    } if $cfg{'runasdaemon'};

    debug('base', "Starting main Loop");

    do {                        # Do this loop once for native mode and forever in daemon mode 

        my $router;        

        $NOW = timestamp;   # get the time

        debug 'time', "loop start ".localtime(time);

        #if we run as daemon, we sleep in between collection cycles

        $sleep_time=  (int($cfg{interval}*60))-(time-$last_time);

        if ($sleep_time > 0 ) { #If greater than 0 the sleep that amount of time

	    debug('time', "Sleep time $sleep_time seconds");

            sleep ($sleep_time);

        } elsif ($last_time > 0) {

            warn "$NOW: WARNING: data collection did not complete within interval!\n";

        }

        $last_time=time;

        # set meta expires if there is an index file

        # 2000/05/03 Bill McGonigle <bill@zettabyte.net>

        if (defined $cfg{'writeexpires'}) {

           my $exp = &expistr($cfg{'interval'});

           my $fil;

           $fil = "$cfg{'htmldir'}index.html"  if -e "$cfg{'htmldir'}index.html";

           $fil = "$cfg{'htmldir'}index.htm"  if -e "$cfg{'htmldir'}index.htm";

            if (defined $fil) {

                   open(META, ">$fil.meta");

                   print META "Expires: $exp\n";

                   close(META);

            }

        }

        # Use SNMP to populate the target object

	debug('base', "Populate Target object by polling SNMP and".

	      " external Datasources");

        debug 'time', "snmp read start ".localtime(time);

        readtargets($confcache,\@target, \%cfg);

        $NOW = timestamp;   # get the time

        # collect data for each router or pseudo target (`executable`)

        debug 'time', "target loop start ".localtime(time);

        foreach $router (@routers) {

	    debug('base', "Act on Router/Target $router");

            if (defined $rcfg{'setenv'}{$router}) {

                my $line = $rcfg{'setenv'}{$router};

                while ( $line =~ s/([^=]+)=\"([^\"]*)\"\s*// ) # " - unconfuse the highliter

 		{ 

		    $ENV{$1}=$2;

                }

	    }

	    my($savetz) = $ENV{'TZ'};

	    if (defined $rcfg{'timezone'}{$router}) {

                $ENV{'TZ'} = $rcfg{'timezone'}{$router};

		if ( $main::OS eq 'UNIX' ){

			require 'POSIX.pm';

			POSIX::tzset();

		}

            }

            my ($inlast, $outlast, $uptime, $name, $time) = 

              getcurrent(\@target, $router, \%rcfg, \%cfg);

            if ( defined($inlast) and defined($outlast)) {

              $EXITCODE = $EXITCODE | 1;

            }

            else {

              $EXITCODE = $EXITCODE | 2;

            }

	    debug('base', "Get Current values: in:".( defined $inlast ? $inlast : "undef").", out:".

                                                 ( defined $outlast? $outlast : "undef").", up:".

                                                 ( defined $uptime ? $uptime : "undef").", name:".

                                                 ( defined $name ? $name : "undef").", time:".

                                                 ( defined $time ? $time : "undef"));

            #abort, if the router is not responding.

            if ($cfg{'logformat'} ne 'rrdtool') {

              # undefined values are ok for rrdtool !

              #if ( not defined $inlast or not defined $outlast){

              #  warn "$NOW: WARNING: Skipping Update of $router, inlast is not defined\n"

              #          unless defined $inlast;

              #  warn "$NOW: WARNING: Skipping Update of $router, outlast is not defined\n"

              #          unless defined $outlast;

              #  next;

              #}

              if (defined $inlast and $inlast < 0) {

                $inlast += 2**31;

                # this is likely to be a broken snmp counter ... lets compensate

              }  

              if (defined $outlast and $outlast < 0) {

                $outlast += 2**31;

                # this is likely to be a broken snmp counter ... lets compensate

              }  

            }

            my ($maxin, $maxout, $maxpercent, $avin, $avout, $avpercent,$avmxin, $avmxout,

                $cuin, $cuout, $cupercent);

	    debug('base', "Create Graphics");

            if ($rcfg{'options'}{'dorelpercent'}{$router}) {

                ($maxin, $maxout, $maxpercent, $avin, $avout, $avpercent,

                 $cuin, $cuout, $cupercent, $avmxin, $avmxout) =

                  writegraphics($router, \%cfg, \%rcfg, $inlast, $outlast, $time,$LOC, \%opts);

            } else {

                ($maxin, $maxout ,$avin, $avout, $cuin, $cuout, $avmxin, $avmxout) =

                  writegraphics($router, \%cfg, \%rcfg, $inlast, $outlast, $time,$LOC, \%opts);

            }

            # skip this update if we did not get anything usefull out of

            # writegraphics

            next if not defined $maxin;

	    debug('base', "Check for Thresholds");

            threshcheck(\%cfg,\%rcfg,$cfgfile,$router,$cuin,$cuout);

	    if (defined $opts{'log-only'}){

		debug('base', "Disable Graph and HTML generation");

	    }

	    if ($cfg{logformat} eq 'rateup' and not defined $opts{'log-only'} ){

		debug('base', "Check for Write HTML Pages");

		writehtml($router, \%cfg, \%rcfg,

			  $maxin, $maxout, $maxpercent, $avin, $avout, $avmxin, $avmxout, $avpercent,

			  $cuin, $cuout, $cupercent, $uptime, $name, $LOC)

	    }

            #

            clonedirectory($router,\%cfg, \%rcfg);

            #

            #put TZ things back in shape ... 

            if ($savetz) {

                $ENV{'TZ'} =  $savetz;

            } else {

                delete $ENV{'TZ'};

            }

	    if ( $main::OS eq 'UNIX' ){

		require 'POSIX.pm';

		POSIX::tzset();

	    };

        }

        # Has the cfg file been modified since we started? if so, reload it.

        if ( -M $cfgfile < $cfgfile_age and 

          $cfg{'runasdaemon'} and $cfg{'runasdaemon'} =~ /y/i ) {

            # reload the configuration

            $cfgfile_age = -M $cfgfile;

            debug('base', "Re-reading Config File: $cfgfile");

            @routers = (); %cfg = (); %rcfg = ();

            readcfg($cfgfile,\@routers,\%cfg,\%rcfg);

            cfgcheck(\@routers, \%cfg, \%rcfg, \@target, \%opts);

        }

        debug('base', "End of main Loop");

    } while ($cfg{'runasdaemon'} and $cfg{'runasdaemon'} =~ /y/i ); #In daemon mode run forever

    debug('base', "Exit main Loop");

    # OK we are done, remove the lock files ... 

    debug('base', "Remove Lock Files");

    close LOCK; unlink ($templock, $lockfile);

    debug('base', "Store Interface Config Cache");

    delete $$confcache{___updated} if exists $$confcache{___updated}; # make sure everything gets written out not only the updated entries

    writeconfcache($confcache,$confcachefile);

    if ( ! $cfg{'runasdaemon'} or $cfg{'runasdaemon'} !~ /y/i ) {

      if ( ($EXITCODE & 1) and ($EXITCODE & 2) ) {

        # At least one target was sucessful

        exit 91;

      }

      elsif ( not ($EXITCODE & 1) and ($EXITCODE & 2) ) {

        # All targets failed

        exit 92;

      }

    }

}

# ( $inlast, $outlast, $uptime, $name, $time ) =

#    &getcurrent( $target, $rou, $rcfg, $cfg )

# Calculate monitored data for device $rou based on information in @$target

# and referring to configuration data in %$rcfg and %$cfg. In the returned

# list, $inlast and $outlast are the input and output monitored data values,

# $uptime is the device uptime, $name is the device name, and $time is the

# current time when the calculation was performed.

sub getcurrent {

	my( $target, $rou, $rcfg, $cfg ) = @_;

	# Hash indexed by $mode for conveniently saving $inlast and $outlast

	my %last;

	# Initialize uptime, device name, and data collection time to empty strings

	my $uptime = '';

	my $name = '';

	my $time = '';

	# Calculate input and output monitored data

	foreach my $mode( qw( _IN_  _OUT_ ) ) {

		# Initialize monitored data, warning message, and death message

		# to empty strings

		my $data;

		my $warning;

		my $death;

		{

			# Code block used to calculate monitoring data

			# Localize warning and death exception handlers to capture

			# error message less any leading and trailing white space

			local $SIG{ __WARN__ } =

				sub { $_[0] =~ /^\s*(.+?)\s*$/; $warning = $1; };

			local $SIG{ __DIE__ } =

				sub { $_[0] =~ /^\s*(.+?)\s*$/; $death = $1; };

			# Calculate monitoring data. $rcfg->{ target }{ $rou } contains

			# a Perl expression for the calculation.

			$data = eval "$rcfg->{target}{$rou}";

       		}

		# Test for various exceptions occurring in the calculation

		if( $warning ) {

			warn "$NOW: ERROR: Target[$rou][$mode] '$$rcfg{target}{$rou}' (warn): $warning\n";

			$data = undef;

		} elsif( $death ) {

			warn "$NOW: ERROR: Target[$rou][$mode] '$$rcfg{target}{$rou}' (kill): $death\n";

			$data = undef;

		} elsif( $@ ) {

			warn "$NOW: ERROR: Target[$rou][$mode] '$$rcfg{target}{$rou}' (eval): $@\n";

			$data = undef;

		} elsif( not defined $data ) {

			warn "$NOW: ERROR: Target[$rou][$mode] '$$rcfg{target}{$rou}' did not eval into defined data\n";

			$data = undef;

		} elsif( $data and $data !~ /^[-+]?\d+(\.\d*)?([eE][+-]?[0-9]+)?$/ ) {

			warn "$NOW: ERROR: Target[$rou][$mode] '$$rcfg{target}{$rou}' evaluated to '$data' instead of a number\n";

			$data = undef;

		} elsif( length( $data ) > 190 ) {

			warn "$NOW: ERROR: $mode value: '$data' is way to long ...\n";

			$data = undef;

		} else {

			# At this point data is considered valid. Round to an integer

			# unless RRDTool is in use and this is a gauge

                        if (not ( $cfg->{ logformat } eq 'rrdtool'

                                      and  defined $rcfg->{ options }{ gauge }{ $rou })){

                            if (ref $data and ref $data eq 'Math::BigFloat') {

                			$data->ffround( 0 )

                            } else {

                                        $data = sprintf "%.0f", $data;

                            }

                        }

			# Remove any leading plus sign

			$data =~ s/^\+//;

		}

		$last{ $mode } = $data;

	}

	# Set $u to the unique index of the @$target array referred to in the

	# monitored data calculation for the current device. $u will be set to

	# -1 if that index is not unique.

	my $u = $rcfg->{ uniqueTarget }{ $rou };

	# Get the uptime, device name, and data collection time from the @$target

	# array if the monitored data calculation refers only to one target.

	# Otherwise it doesn't make sense to do this.

	if( $u >= 0 ) {

		$uptime = $target->[ $u ]{ _UPTIME_ };

		$name = $target->[ $u ]{ _NAME_ };

		$time = $target->[ $u ]{ _TIME_ };

                if ($time =~ /^([-0-9.]+)$/) {

                   $time = $1;

                }

	}

	# Set the time to the current time if it was not set above

	$time = time unless $time;

	# Cache uptime location for reading name

	my( $uploc );

	# Get the uptime and device name from the alternate location (community@host or

	# (OID:community@host or OID) that may have been specified with the RouterUptime

	# target keyword

	if( defined $rcfg->{ routeruptime }{ $rou } ) {

		my( $noid, $nloc ) = split( /:/, $rcfg->{ routeruptime }{ $rou }, 2 );

		# If only location (community@host) was specified then

		# move the location details into the right place

		if( $noid =~ /@/ ) {

			$nloc = $noid;

			$noid = undef;

		}

		# If no OID (community@host) was specified use the hardcoded default

		if( not $noid ) {

			$noid = 'sysUptime';

		}

		# If no location (community@host) was specified use values from the

		# unique target referred to in the monitored data calculation

		if( not $nloc ){

                        if ($u >= 0) {

          		    my $comm = $target->[ $u ]{ Community };

			    my $host = $target->[ $u ]{ Host };

			    my $opt = $target->[ $u ]{ SnmpOpt };

			    $nloc = "$comm\@$host$opt";

		        } else {

                            die "$NOW: ERROR: You must specify the location part of the RouterUptime oid for non unique targets! ($rou)\n";

                        }

                }

		$uploc = $nloc;

		# Get the device uptime if $noid(OID) and $nloc (community@host) have been specified

		# one way or the other

		debug('base', "Fetching sysUptime and sysName from: $noid:$nloc");

		( $uptime, $name ) = snmpget( $uploc, $rcfg->{ snmpoptions }{ $rou }, $noid, 'sysName');

	}

	# Get the device name from the alternate location (OID or

	# OID:community@host) that may have been specified with the RouterName

	# target keyword

	if( defined $rcfg->{ routername }{ $rou } ) {

		my( $noid, $nloc ) = split( /:/, $rcfg->{ routername }{ $rou }, 2 );

		# If no location (community@host) was specified use values from the

		# unique target referred to in the monitored data calculation

		if( $u >= 0 and not $nloc ) {

			my $comm = $target->[ $u ]{ Community };

			my $host = $target->[ $u ]{ Host };

			my $opt = $target->[ $u ]{ SnmpOpt };

			$nloc = "$comm\@$host$opt";

		}

		# Get the location from the RouterUptime keyword if that is defined

		# and $nloc has not otherwise been specified

		$nloc = $uploc if $uploc and not $nloc;

		# Get the device name if $nloc (community@host) has been specified

		# one way or the other

		debug('base', "Fetching sysName from: $noid:$nloc");

		( $name ) = snmpget( $nloc, $$rcfg{snmpoptions}{ $rou }, $noid ) if $nloc;

	}

	return ( $last{ _IN_ }, $last{ _OUT_ }, $uptime, $name, $time );

}

sub rateupcheck ($) {

    my $router = shift;

    if ($?) {

        my $value = $?;

        my $signal =  $? & 127; #ignore the most significant bit 

                                #as it is always one when it is a returning

                                #child says dave ...

        if (($MRTG_lib::OS ne 'UNIX') || ($signal != 127)) {

            my $exitval = $? >> 8;

            warn "$NOW: WARNING: rateup died from Signal $signal\n".

              " with Exit Value $exitval when doing router '$router'\n".

                " Signal was $signal, Returncode was $exitval\n"

        }

    }

}

sub clonedirectory {

    my($router,$cfg, $rcfg) = @_;

    require File::Copy;

    import File::Copy;

    return unless ( $$rcfg{'clonedirectory'}{$router} );

    my ($clonedstdir, $clonedsttarget ,$srcname, $dstname);

    ($clonedstdir, $clonedsttarget ) = split (/,|\s+/, $$rcfg{'clonedirectory'}{$router}) if ( $$rcfg{'clonedirectory'}{$router} =~ /,|\S\s+\S/ );

    if ( defined $clonedsttarget ) {

		$clonedsttarget =~ s/\s+//;

		$clonedsttarget = lc($clonedsttarget);

    } else {

        	$clonedstdir = $$rcfg{'clonedirectory'}{$router};

    }

    if ( $$rcfg{'directory'}{$router} ne $clonedstdir) {

	$clonedstdir =~ s/\s+$//;

        $clonedstdir .= "/" unless ($clonedstdir =~ /\/$/);

        my $fullpathsrcdir = "$$cfg{'logdir'}$$rcfg{'directory'}{$router}";

        my $fullpathdstdir = "$$cfg{'logdir'}$clonedstdir";

        die "$NOW: ERROR: Destination dir: $fullpathdstdir not found for cloning process\n" unless ( -e $fullpathdstdir );

        die "$NOW: ERROR: Destination dir: $fullpathdstdir is not a directory destination for cloning process\n" unless ( -d $fullpathdstdir );

        die "$NOW: ERROR: Destination dir: $fullpathdstdir is not writeable for cloning process\n" unless ( -w $fullpathdstdir );

        if ( defined $clonedsttarget ) {

        	debug('base', "Clone directory $fullpathsrcdir to $fullpathdstdir " . 

			       "renaming target $router to $clonedsttarget"); 

	} else {

        	debug('base', "Clone directory $fullpathsrcdir to $fullpathdstdir");

	}

        foreach my $srcfile (<$fullpathsrcdir$router\[.-\]*>) {

                debug('base', "copying $srcfile $fullpathdstdir");

                copy("$srcfile","$fullpathdstdir") or warn "$NOW: WARNING: Cloning $srcfile to $fullpathdstdir unsuccessful; $!\n";

                if ($srcfile =~ /\.html/i) {

                        debug('base', "altering $fullpathdstdir/$router.$$rcfg{'extension'}{$router}");

                        #

                        my $dirrel = "../" x ($$rcfg{'clonedirectory'}{$router} =~ tr|/|/|);

                        #

                        debug('base', "dirrel $dirrel $clonedstdir");

                        open(HTML,"$fullpathdstdir/$router.$$rcfg{'extension'}{$router}");

                        my @CLONEHTML = <HTML>;

                        close(HTML);

                        foreach ( @CLONEHTML ) {

	    			if ( defined $clonedsttarget and /$router/ ) {

                                       	debug('base', "altering $router to $clonedsttarget in html file");

					s/$router/$clonedsttarget/i;

				}

                                if ( /SRC=/i and /$$rcfg{'directory'}{$router}/ ) {

                                        debug('base', "altering from $_");

                                        s|(\.\./)+|$dirrel|;

                                        s|$$rcfg{'directory'}{$router}|$clonedstdir|;

                                        debug('base', "altering to $_");

                                }

                        }

                        open(HTML,">$fullpathdstdir/$router.$$rcfg{'extension'}{$router}");

                        print HTML $_ for ( @CLONEHTML );

                        close(HTML);

                }

	    	if ( defined $clonedsttarget ) {

			$srcfile =~ /.+\/(.+)?$/;

			$srcname = $1;

			$dstname = $srcname;

			$dstname =~ s/$router/$clonedsttarget/;

                        debug('base', "Clone renaming $srcname to $dstname at $fullpathdstdir");

                	rename("$fullpathdstdir/$srcname","$fullpathdstdir/$dstname") or 

				warn "$NOW: WARNING: Renaming $fullpathdstdir/$srcname to $fullpathdstdir/$dstname unsuccessful; $!\n";

		}

        }

    } else {

      warn "$NOW: WARNING: Cloning to the same place suspended. ; $!\n";

    }

}

sub writegraphics {

    my($router, $cfg, $rcfg, $inlast, $outlast, $time,$LOC, $opts) = @_;

    my($absmax,$maxv, $maxvi, $maxvo, $i, $period, $res);

    my(@exec, @mxvls, @metas);

    my(%maxin, %maxout, %maxpercent, %avin, %avout, %avmxin, %avmxout,  %avpercent, %cuin, %cuout, %cupercent);

    my($rrdinfo);

    @metas = ();

    $maxvi = $$rcfg{'maxbytes1'}{$router};

    $maxvo = $$rcfg{'maxbytes2'}{$router};

    if ($maxvi > $maxvo) {

        $maxv = $maxvi;

    } else {

        $maxv = $maxvo;

    }

    $absmax = $$rcfg{'absmax'}{$router};

    $absmax = $maxv unless defined $absmax;

    if ($absmax < $maxv) {

        die "$NOW: ERROR: AbsMax: $absmax is smaller than MaxBytes: $maxv\n";

    }

    # select whether the datasource gives relative or absolute return values.

    my $up_abs="u";

    $up_abs='m' if defined $$rcfg{'options'}{'perminute'}{$router};

    $up_abs='h' if defined $$rcfg{'options'}{'perhour'}{$router};

    $up_abs='d' if defined $$rcfg{'options'}{'derive'}{$router};

    $up_abs='a' if defined $$rcfg{'options'}{'absolute'}{$router};

    $up_abs='g' if defined $$rcfg{'options'}{'gauge'}{$router};

    my $dotrrd = "$$cfg{'logdir'}$$rcfg{'directory'}{$router}$router.rrd";

    my $dotlog = "$$cfg{'logdir'}$$rcfg{'directory'}{$router}$router.log";

    my $reallog = $$cfg{logformat} eq 'rrdtool' ? $dotrrd : $dotlog;

    if (defined $$cfg{maxage} and -e $reallog and time()-$$cfg{maxage} > (stat($reallog))[9]){

         warn "$NOW: ERROR: skipping update of $router. As $reallog is older than MaxAge ($$cfg{maxage} s)\n";

         return undef;

    }

    if ($$cfg{logformat} eq 'rrdtool') {

        debug('base',"start RRDtool section");

        # make sure we got some sane default here

        my %dstype = qw/u COUNTER a ABSOLUTE g GAUGE h COUNTER m COUNTER d DERIVE/;

        $up_abs = $dstype{$up_abs};

        # update the database.

        # set minimum/maximum values. use 'U' if we cannot get good values

        # the lower bound is hardcoded to 0

        my $absi = $maxvi;

        my $abso = $maxvo;

        $absi = $abso = $$rcfg{'absmax'}{$router}

            if defined $$rcfg{'absmax'}{$router};

        debug('base',"maxi:$absi, maxo:$abso");

        $absi = 'U' if $absi == 0;

        $abso = 'U' if $abso == 0;

        # check to see if we already have an RRD file or have to create it

        # maybe we can convert an .log file to the new rrd format

        if( $RRDs::VERSION >= 1.4 and $$cfg{rrdcached} and $$cfg{rrdcached} !~ /^unix:/ ) {

             # rrdcached in network mode.  No log conversion possible.

             # In this mode, we cannot use absolute paths.  So, we strip logdir from the name.

             $dotrrd = "$$rcfg{'directory'}{$router}$router.rrd";

             if( $RRDs::VERSION < 1.49 ) {

               # This version of RRD doesnt support info, create and tune

               debug('base',"Unable to verify RRD file with this version of rrdcached");

               if( !$main::verified_rrd{$dotrrd} ) {

                 warn "WARN: Unable to verify $dotrrd with this version of RRDTool\n";

                 $main::verified_rrd{$dotrrd} = 1;

               }

             } elsif( !$main::verified_rrd{$dotrrd} ) {

               # Test to see if it exists

               debug('base',"Attempting to verify RRD file via rrdcached");

               $rrdinfo = RRDs::info($dotrrd,'--daemon',$$cfg{rrdcached},'--noflush');

               if(!$rrdinfo) { # doesnt exist, or cannot be accessed

                  my $e = RRDs::error();

                  warn "$NOW: Cannot access $dotrrd; will attempt to (re)create it: $e\n" if $e;

                  # don't fail if interval is not set

                  my $interval = $$cfg{interval};

                  my $minhb = int($$cfg{interval} * 60)*2;

                  $minhb = 600 if ($minhb <600); 

                  my $rows = $$rcfg{'rrdrowcount'}{$router} || int( 4000 / $interval);

                  my $rows30m = $$rcfg{'rrdrowcount30m'}{$router} || 800;

                  my $rows2h = $$rcfg{'rrdrowcount2h'}{$router} || 800;