datadir = $config['datadir']; $this->rrdtool = $config['rrdtool']; $this->rrdtool_opts = $config['rrdtool_opts']; $this->cache = $config['cache']; $this->parse_get(); $this->rrd_files(); $this->width = GET('x'); if (empty($this->width)) $this->width = $config['width']; $this->height = GET('y'); if (empty($this->height)) $this->height = $config['height']; $this->graph_type = $config['graph_type']; $this->negative_io = $config['negative_io']; $this->graph_smooth = $config['graph_smooth']; } function rainbow_colors() { $c = 0; $sources = count($this->rrd_get_sources()); foreach ($this->rrd_get_sources() as $ds) { # hue (saturnation=1, value=1) $h = $sources > 1 ? 360 - ($c * (330/($sources-1))) : 360; $h = ($h %= 360) / 60; $f = $h - floor($h); $q[0] = $q[1] = 0; $q[2] = 1*(1-1*(1-$f)); $q[3] = $q[4] = 1; $q[5] = 1*(1-1*$f); $hex = ''; foreach(array(4,2,0) as $j) { $hex .= sprintf('%02x', $q[(floor($h)+$j)%6] * 255); } $this->colors[$ds] = $hex; $c++; } } # parse $_GET values function parse_get() { $this->args = array( 'host' => GET('h'), 'plugin' => GET('p'), 'pinstance' => GET('pi'), 'category' => GET('c'), 'type' => GET('t'), 'tinstance' => GET('ti'), ); $this->seconds = GET('s'); } function validate_color($color) { if (!preg_match('/^[0-9a-f]{6}$/', $color)) return '000000'; else return $color; } function get_faded_color($fgc, $bgc='ffffff', $percent=0.25) { $fgc = $this->validate_color($fgc); if (!is_numeric($percent)) $percent=0.25; $rgb = array('r', 'g', 'b'); $fg['r'] = hexdec(substr($fgc,0,2)); $fg['g'] = hexdec(substr($fgc,2,2)); $fg['b'] = hexdec(substr($fgc,4,2)); $bg['r'] = hexdec(substr($bgc,0,2)); $bg['g'] = hexdec(substr($bgc,2,2)); $bg['b'] = hexdec(substr($bgc,4,2)); foreach ($rgb as $pri) { $c[$pri] = dechex(round($percent * $fg[$pri]) + ((1.0 - $percent) * $bg[$pri])); if ($c[$pri] == '0') $c[$pri] = '00'; } return $c['r'].$c['g'].$c['b']; } function rrd_escape($value) { if ($this->graph_type == 'canvas') { # http://oss.oetiker.ch/rrdtool/doc/rrdgraph_graph.en.html#IEscaping_the_colon return str_replace(':', '\:', $value); } else { # php needs it double escaped to execute rrdtool correctly return str_replace(':', '\\\:', $value); } } function parse_filename($file) { if ($this->graph_type == 'canvas') { $file = str_replace($this->datadir . '/', '', $file); # rawurlencode all but / $file = 'rrd.php?' . str_replace('%2F', '/', rawurlencode($file)); } else { # escape characters $file = str_replace(array(' ', '(', ')'), array('\ ', '\(', '\)'), $file); } return $this->rrd_escape($file); } function rrd_files() { $files = $this->get_filenames(); foreach($files as $filename) { $basename=basename($filename,'.rrd'); $instance = strpos($basename,'-') ? substr($basename, strpos($basename,'-') + 1) : 'value'; $this->tinstances[] = $instance; $this->files[$instance] = $filename; $this->identifiers[$instance] = preg_replace("#^$this->datadir/(.*)\.rrd$#", '$1', $filename); } sort($this->tinstances); ksort($this->files); ksort($this->identifiers); } function get_filenames() { $identifier = sprintf('%s/%s%s%s%s%s/%s%s%s', $this->args['host'], $this->args['plugin'], strlen($this->args['category']) ? '-' : '', $this->args['category'], strlen($this->args['pinstance']) ? '-' : '', $this->args['pinstance'], $this->args['type'], strlen($this->args['tinstance']) ? '-' : '', $this->args['tinstance'] ); $identifier = preg_replace("/([*?[])/", '[$1]', $identifier); $wildcard = strlen($this->args['tinstance']) ? '.' : '[-.]*'; $files = glob($this->datadir .'/'. $identifier . $wildcard . 'rrd'); return $files; } function rrd_graph($debug = false) { if (!$this->colors) $this->rainbow_colors(); $graphdata = $this->rrd_gen_graph(); $style = $debug !== false ? $debug : $this->graph_type; switch ($style) { case 'cmd': print '
';
				foreach ($graphdata as $d) {
					printf("%s \\\n", $d);
				}
				print '
'; break; case 'canvas': printf('', sha1(serialize($graphdata))); foreach ($graphdata as $d) { printf("%s\n", $d); } print ''; break; case 'debug': case 1: print '
';
				print_r($graphdata);
				print '
'; break; case 'png': default: # caching if (is_numeric($this->cache) && $this->cache > 0) header("Expires: " . date(DATE_RFC822,strtotime($this->cache." seconds"))); header("content-type: image/png"); $graphdata = implode(' ', $graphdata); echo `$graphdata`; break; } } function rrd_options() { if ($this->graph_type != 'canvas') { $rrdgraph[] = $this->rrdtool; $rrdgraph[] = 'graph - -a PNG'; } if ($this->rrdtool_opts != '') $rrdgraph[] = $this->rrdtool_opts; if ($this->graph_smooth) $rrdgraph[] = '-E'; $rrdgraph[] = sprintf('-w %d', is_numeric($this->width) ? $this->width : 400); $rrdgraph[] = sprintf('-h %d', is_numeric($this->height) ? $this->height : 175); $rrdgraph[] = '-l 0'; $rrdgraph[] = sprintf('-t "%s on %s"', $this->rrd_title, $this->args['host']); if ($this->rrd_vertical) $rrdgraph[] = sprintf('-v "%s"', $this->rrd_vertical); $rrdgraph[] = sprintf('-s e-%d', is_numeric($this->seconds) ? $this->seconds : 86400); return $rrdgraph; } function rrd_get_sources() { # is the source spread over multiple files? if (is_array($this->files) && count($this->files)>1) { # and must it be ordered? if (is_array($this->order)) { $this->tinstances = array_merge(array_intersect($this->order, $this->tinstances)); } # use tinstances as sources if(is_array($this->data_sources) && count($this->data_sources)>1) { $sources = array(); foreach($this->tinstances as $f) { foreach($this->data_sources as $s) { $sources[] = $f . '-' . $s; } } } else { $sources = $this->tinstances; } } # or one file with multiple data_sources else { if(is_array($this->data_sources) && count($this->data_sources)==1 && in_array('value', $this->data_sources)) { # use tinstances as sources $sources = $this->tinstances; } else { # use data_sources as sources $sources = $this->data_sources; } } $this->parse_ds_names($sources); return $sources; } function parse_ds_names($sources) { # fill ds_names if not defined by plugin if (!is_array($this->ds_names)) $this->ds_names = array_combine($sources, $sources); # detect length of longest ds_name $max = 0; foreach ($this->ds_names as $ds_name) { if(strlen((string)$ds_name) > $max) $max = strlen((string)$ds_name); } # make all ds_names equal in lenght $format = sprintf("%%-%ds", $max); foreach ($this->ds_names as $index => $value) { $this->ds_names[$index] = sprintf($format, $value); } } function rrd_gen_graph() { $rrdgraph = $this->rrd_options(); $sources = $this->rrd_get_sources(); if ($this->scale) $raw = '_raw'; else $raw = null; $i=0; foreach ($this->tinstances as $tinstance) { foreach ($this->data_sources as $ds) { $rrdgraph[] = sprintf('DEF:min_%s%s=%s:%s:MIN', crc32hex($sources[$i]), $raw, $this->parse_filename($this->files[$tinstance]), $ds); $rrdgraph[] = sprintf('DEF:avg_%s%s=%s:%s:AVERAGE', crc32hex($sources[$i]), $raw, $this->parse_filename($this->files[$tinstance]), $ds); $rrdgraph[] = sprintf('DEF:max_%s%s=%s:%s:MAX', crc32hex($sources[$i]), $raw, $this->parse_filename($this->files[$tinstance]), $ds); $i++; } } if ($this->scale) { $i=0; foreach ($this->tinstances as $tinstance) { foreach ($this->data_sources as $ds) { $rrdgraph[] = sprintf('CDEF:min_%s=min_%1$s_raw,%s,*', crc32hex($sources[$i]), $this->scale); $rrdgraph[] = sprintf('CDEF:avg_%s=avg_%1$s_raw,%s,*', crc32hex($sources[$i]), $this->scale); $rrdgraph[] = sprintf('CDEF:max_%s=max_%1$s_raw,%s,*', crc32hex($sources[$i]), $this->scale); $i++; } } } if(count($this->files)<=1) { $c = 0; foreach ($sources as $source) { $color = is_array($this->colors) ? (isset($this->colors[$source])?$this->colors[$source]:$this->colors[$c++]): $this->colors; $rrdgraph[] = sprintf('AREA:max_%s#%s', crc32hex($source), $this->get_faded_color($color)); $rrdgraph[] = sprintf('AREA:min_%s#%s', crc32hex($source), 'ffffff'); break; # only 1 area to draw } } $c = 0; foreach ($sources as $source) { $dsname = empty($this->ds_names[$source]) ? $source : $this->ds_names[$source]; $color = is_array($this->colors) ? (isset($this->colors[$source])?$this->colors[$source]:$this->colors[$c++]): $this->colors; $rrdgraph[] = sprintf('"LINE1:avg_%s#%s:%s"', crc32hex($source), $this->validate_color($color), $this->rrd_escape($dsname)); $rrdgraph[] = sprintf('"GPRINT:min_%s:MIN:%s Min,"', crc32hex($source), $this->rrd_format); $rrdgraph[] = sprintf('"GPRINT:avg_%s:AVERAGE:%s Avg,"', crc32hex($source), $this->rrd_format); $rrdgraph[] = sprintf('"GPRINT:max_%s:MAX:%s Max,"', crc32hex($source), $this->rrd_format); $rrdgraph[] = sprintf('"GPRINT:avg_%s:LAST:%s Last\\l"', crc32hex($source), $this->rrd_format); } return $rrdgraph; } } ?>