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# -*-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.
#
# Ripped off lock, stock, and barrel from JRA's file.pm.
# - ejt 08/08/1999
use Common::Log;
$main::gDSFetch{'field'} = \&fieldFetch;
sub fieldFetch {
# This procedure is passed a REFERENCE to an array of file datasources.
# Each line consists of "index:filename:key:valuef:keyf:delim"
#
# There can be spaces in the key, but there probably won't be.
# "valuef" defaults to "2" if not specified
# "keyf" defaults to "1" if not specified
# "delim" defaults to ":" if not specified
#
# VERY IMPORTANT: The index MUST be returned with the corresponding value,
# otherwise it'll get put back into the wrong spot in the RRD.
my($dsList, $name, $target) = @_;
my(@results, %files);
my($line);
foreach $line (@{$dsList}) {
my(@components) = split(/:/, $line, 6);
my ($index, $file, $key, $valuef, $keyf, $delim);
if ($#components+1 < 3) {
Error("Malformed datasource source: $line.");
return ();
}
$index = shift(@components);
$file = shift(@components);
$key = shift(@components);
$valuef = shift(@components) || 2;
$keyf = shift(@components) || 1;
$delim = shift(@components) || ":";
push(@{ $files{$file} }, "$index:$file:$key:$valuef:$keyf:$delim");
}
my($file, $ilRef, $il);
while (($file, $ilRef) = each %files) {
Info("Reading data from $file for " . $target->{'auto-target-name'});
if (open(F, "<$file")) {
my(@lines);
chomp(@lines = <F>);
close(F);
while ($il = shift @{ $ilRef } ) {
my($index, $file, $key,
$valuef, $keyf, $delim) = split(/:/, $il, 6);
my $matches = 0;
my $match = 0;
foreach my $line (@lines) {
my @bits = split($delim, $line);
# just skip lines with too few fields
next if (($#bits < $keyf - 1) || ($#bits < $valuef - 1));
if ($bits[$keyf - 1] eq $key) {
$matches++;
$match = $bits[$valuef - 1];
}
}
if ($matches > 1) {
push @results, "$index:U";
Error("Key $key matched $matches times for " .
$target->{'auto-target-name'} .
" from file $file.");
} elsif ($matches == 0) {
push @results, "$index:U";
} else {
push @results, "$index:$match";
}
}
} else {
Error("Could not fetch data for " . $target->{'auto-target-name'} .
" from file $file: $!.");
}
}
return @results;
}
1;
# Local Variables:
# mode: perl
# indent-tabs-mode: nil
# tab-width: 4
# perl-indent-level: 4
# End:
|
