/usr/share/cricket/lib/Common/HandleTarget.pm is in cricket 1.0.5-21.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# Cricket: a configuration, polling and data display wrapper for RRD files
#
# Copyright (C) 1998 Jeff R. Allen and WebTV Networks, Inc.
#
# 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., 675 Mass Ave, Cambridge, MA 02139, USA.
package Common::HandleTarget;
require Exporter;
@ISA = qw(Exporter);
@EXPORT = qw(handleTarget handleTargetInstance checkTargetInstance);
use Common::Log;
use Common::Util;
use Common::Map;
use RRD::File;
sub handleTarget {
my($name, $instHandler, $cb) = @_;
Debug("Processing $name...");
my($target) = $Common::global::gCT->configHash($name, 'target');
ConfigTree::Cache::addAutoVariables($name, $target,
$Common::global::gConfigRoot);
my($tname) = $target->{'auto-target-name'};
Common::Map::mapPrepareInstance($target);
# check for non-scalar instance
# and handle as a special case with a loop
my(@inst);
if (defined($target->{'inst'})) {
my($inst) = $target->{'inst'};
$inst = ConfigTree::Cache::expandString($inst, $target, \&Warn)
if (length($inst) > 2 && index($inst, "%") >= 0);
Debug("Evaling inst which is: $inst");
$inst = quoteString($inst);
@inst = Eval($inst);
} else {
@inst = ();
}
if ($#inst+1 > 1) {
my $instnames;
my(@instnames) = ();
my $hasInstNames = 0;
if (defined($target->{'inst-names'})) {
$instnames = $target->{'inst-names'};
$instnames = ConfigTree::Cache::expandString($instnames,$target,\&Warn);
$instnames = quoteString($instnames);
@instnames = Eval($instnames);
$hasInstNames = 1;
}
my($inst);
foreach $inst (@inst) {
$instnames = shift @instnames if $hasInstNames;
# copy the current target to a temp target we can play
# with -- i.e. set the inst to a scalar, then expand
my($k, $v, $tmpTarg);
$tmpTarg = {};
foreach $k (keys(%{$target})) {
$tmpTarg->{$k} = $target->{$k};
}
$tmpTarg->{'inst'} = $inst;
# use inst-name instead of inst-names here because
# I have no idea if inst-names is used later in the code
$tmpTarg->{'inst-name'} = $instnames if $hasInstNames;
Debug("Processing target $tname, instance $inst.");
&{$instHandler}($name, $tmpTarg, $cb);
}
} else {
# this is a scalar case, just continue into handleTargetInstance.
$target->{'inst'} = (defined($inst[0]) ? $inst[0] : "");
&{$instHandler}($name, $target, $cb);
}
}
sub handleTargetInstance {
my($name, $target, $cb) = @_;
# expand it wrt itself
ConfigTree::Cache::expandHash($target, $target, \&Warn);
# this will do instance mapping, or leave the target untouched
# if there's no work to do. (mapPrepareInstance has to have been
# called first...)
Common::Map::mapInstance($name, $target);
# now, call the callback passed into us by the
# parent
&{$cb}($name, $target);
}
sub checkTargetInstance {
my($name,$target) = @_;
# expand it wrt itself
ConfigTree::Cache::expandHash($target, $target, \&Warn);
if (! $target->{'monitor-thresholds'}) {
return;
}
my($m) = new Monitor;
my($rrd) = new RRD::File( -file=>$target->{'rrd-datafile'} );
if (!$rrd->open()) {
Info("Couldn't open RRD File for $name, skipping this target.");
return;
}
my $rrdpollinterval = $target->{'rrd-poll-interval'};
my $time = time();
# Convert backslashed commas to \0's ;
my $ThresholdString = $target->{'monitor-thresholds'};
$ThresholdString =~ s/\\,/\0/g ;
my(@ThresholdStrings) = split(/\s*,\s*/, $ThresholdString );
my($Threshold);
# General monitor threshold format:
# datasource:monitor type:monitor args:action:action args
# Current supported actions: FUNC, EXEC, FILE, MAIL, SNMP, META
# Action args are colon (:) delimited.
# Monitor args are colon (:) delimited, but must not collide with
# any of the action tags.
# SNMP is the exception; it has no action args and instead uses
# the target variable trap-address. This exception is maintained for
# backwards compatibility.
# META only stores an alarm in the *.meta files; It can have any number of
# action arguments which can serve to group alarms
# for classification or to identify a priority priority level. Arguments
# are not interpreted or processed in any way by Monitor.pm.
foreach $Threshold (@ThresholdStrings) {
# restore escaped commas
$Threshold =~ s/\0/,/g ;
my($span) = 0;
my($spanlength);
my($ds,$type,$args) = split(/:/, $Threshold, 3);
($args, $spanlength) = split(/:SPAN:/, $args, 2) if ($args =~ /SPAN/);
if (defined ($spanlength) && $spanlength =~ /\d+/ ){
$span = 1;
}
# hide escaped colons
$args =~ s/\\:/\0/g ;
# default action type is SNMP
my($actionType) = 'SNMP' ;
my(@actionArgs);
# search for an action tag
if ( $args =~ /^(.*):(FUNC|EXEC|FILE|MAIL|META):(.*)$/ ) {
$args = $1 ;
$actionType = $2 ;
# restore escaped colons in the monitor args field
$args =~ s/\0/:/g ;
my $action_args = $3;
# action args are colon-delimited
@actionArgs = split(/:/, $action_args);
# restore escaped colons in the action args field
map { $_ =~ s/\0/:/g } @actionArgs;
} elsif ( $args =~ /^(.*):(SNMP|META)\s*$/ ) {
$args = $1 ;
$actionType = $2 ;
# restore escaped colons
$args =~ s/\0/:/g ;
}
if (defined($Common::global::gMonitorTable{"$type"})) {
my $persistent = $target->{'persistent-alarms'};
$persistent = 'false' if (!defined($persistent));
my ($rc, $val) =
&{$Common::global::gMonitorTable{"$type"}}
($m, $target, $ds, $type, $args);
if ($rc) {
# the test succeeded, check to see if we
# should send a trap or not
LogMonitor("$name - $Threshold passed.");
my($metaRef) = $rrd->getMeta();
if (defined($metaRef->{$Threshold})) {
LogMonitor("Triggering recovery for $Threshold.");
$m->Clear($target,$name,$ds,$type,$Threshold,$actionType,
\@actionArgs,$val);
delete($metaRef->{$Threshold});
$rrd->setMeta($metaRef);
}
} else {
my($metaRef) = $rrd->getMeta();
my ($x, $mt, $mevent, $rest);
($x,$mt, $mevent, $rest) = split (/\s+/, $metaRef->{$Threshold},4)
unless (!defined($metaRef->{$Threshold}));
$mt = $time if !defined($mt);
LogMonitor("$name - $mt - $Threshold failed.");
my($spanfail) = 0;
if ($span && $mt < ($time - ($spanlength * $rrdpollinterval) - 90)) {
$spanfail = 1;
}
if ((!$span || $span && $spanfail) &&
($persistent eq "true" || !defined($metaRef->{$Threshold})) ) {
LogMonitor("Triggering alarm for $Threshold.");
$m->Alarm($target,$name,$ds,$type,$Threshold,$actionType,\@actionArgs,$val);
$metaRef->{$Threshold} = ' '. $mt .' failure value '. $val;
$rrd->setMeta($metaRef);
} elsif ($span && (!defined($mevent)) || (($mevent ne 'failure') && $spanfail)) {
LogMonitor("Triggering a span event for $Threshold.");
my($event) = ($spanfail) ? 'failure' : 'spanevent';
$m->Alarm($target,$name,$ds,$type,$Threshold,$actionType,\@actionArgs,$val) if ($spanfail);
$metaRef->{$Threshold} = ' '. $mt . ' ' . $event . ' value '. $val;
$rrd->setMeta($metaRef);
}
}
} else {
Warn("No monitor handler defined for monitor type $type");
}
}
$rrd->close();
}
1;
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