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#!/usr/local/bin/perl -wT
# -*- perl -*-
# 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.
BEGIN {
# this script lives in the util subdirectory
my $programdir = (($0 =~ m:^(.*/)util:)[0] || "./") . ".";
eval "require '$programdir/cricket-conf.pl'";
eval "require '$programdir/../cricket-conf.pl'"
unless $Common::global::gInstallRoot;
$Common::global::gInstallRoot ||= $programdir;
}
use lib "$Common::global::gInstallRoot/lib";
use CGI qw(carpout fatalsToBrowser);
use RRDs 1.000101;
use ConfigTree::Cache;
use Common::Version;
use Common::global;
use Common::HandleTarget;
use Common::Util;
use Common::Log;
$log = 'debug';
Common::Log::setLevel($log);
$gQ = new CGI;
fixHome($gQ);
$Common::global::gCT = new ConfigTree::Cache;
$gCT = $Common::global::gCT;
$gCT->Base($Common::global::gConfigRoot);
$gCT->Warn(\&Warn);
print $gQ -> header('text/plain');
if (! $gCT->init()) {
print "Failed to open compiled config tree from " .
"$Common::global::gConfigRoot/config.db: $!";
exit(0);
}
my($recomp, $why) = $gCT->needsRecompile();
if ($recomp) {
print "Config tree needs to be recompiled: $why";
exit;
}
# validate target name
my($name) = $gQ->param("target");
my($targetRef) = $gCT->configHash($name,'target');
if (!defined($targetRef)) {
print "Specified target missing or invalid";
exit;
}
ConfigTree::Cache::addAutoVariables($name, $targetRef, $Common::global::gConfigRoot);
my($ttRef) = $gCT->configHash($name, 'targettype',
lc($targetRef->{'target-type'}));
if (! defined($ttRef)) {
print "Invalid or missing target-type for $name";
exit;
}
# validate data source
my($ds) = $gQ -> param('ds');
if (!defined($ds)) {
print "Missing data source name";
exit;
}
my($dslist) = $ttRef->{'ds'};
my($dsnum) = 0;
my($bFound) = 0;
foreach $dsname (split(/\s*,\s*/, $dslist))
{
if ($dsname eq $ds) {
$bFound = 1;
last;
}
$dsnum++
}
if (!$bFound) {
print "Specified data source $ds does not exist for target $name";
exit;
}
my($rrd) = $targetRef->{'rrd-datafile'};
# is this a vector-instance target?
# borrowed from HandleTarget
my(@inst);
if (defined($targetRef->{'inst'})) {
my($inst) = $targetRef->{'inst'};
$inst = ConfigTree::Cache::expandString($inst, $targetRef, \&Warn);
# assume $inst is something like (1..8) or (50,51,52)
$inst =~ s/^\s*\(//;
$inst =~ s/\)\s*$//;
if ($inst =~ /([0-9]+)\.\.([0-9]+)/) {
if ($2 > $1) {
my ($start,$end) = ($1, $2);
for ( ;$start <= $end; ++$start) { push @inst, $start; }
}
} else {
@inst = split(/\s*,\s*/,$inst);
}
} else {
@inst = ();
}
if (scalar(@inst) > 1) {
if (!defined($gQ->param('inst'))) {
print "Target is a vector instance, but no instance specified";
exit;
}
# is the inst valid?
$bFound = 0;
foreach $inst (@inst) {
if ($inst eq $gQ->param('inst')) {
$bFound = 1;
last;
}
}
if (!$bFound) {
print "Instance specified " . $gQ->param('inst')
. " is not valid for target $name";
exit;
}
# because inst appears in rrd-datafile, we need to remap inst to a scalar
my($inst_save) = $targetRef->{'inst'};
$targetRef->{'inst'} = $gQ->param('inst');
$rrd = ConfigTree::Cache::expandString($rrd, $targetRef, \&Warn);
# not strictly necessary because at the moment this value won't be used
# down stream... however, that may change in the future
$targetRef->{'inst'} = $inst_save;
} else {
$rrd = ConfigTree::Cache::expandString($rrd, $targetRef, \&Warn);
}
# at this point, we have:
# a rrd data file pathname
my @arg;
if ($Common::global::gLongDSName) {
@arg = ('--aberrant-reset',"$dsname");
} else {
# a data source number (to compute the Cricket ds# name)
@arg = ('--aberrant-reset',"ds$dsnum");
}
RRDs::tune $rrd, @arg;
my($err) = RRDs::error();
if ($err) {
print "Failed:\ntune $rrd " . join(" ",@arg);
print "\nRRDtool: $err\n";
} else {
print "Success:\ntune $rrd " . join(" ",@arg) . "\n";
}
1;
# borrowed from grapher.cgi
sub fixHome {
return if (defined($Common::global::gCricketHome) &&
$Common::global::gCricketHome =~ /\//);
my($sname) = $gQ->script_name();
if ($sname =~ /\/~([^\/]*)\//) {
my($username) = $1;
my($home) = (getpwnam($username))[7];
if ($home) {
$Common::global::gCricketHome = $home;
return;
} else {
Info("Could not find a home directory for user $username." .
"gCricketHome is probably not set right.");
}
} else {
Info("Could not find a username in SCRIPT_NAME. " .
"gCricketHome is probably not set right.");
}
$Common::global::gCricketHome ||= $Common::global::gInstallRoot . "/..";
}
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