87 lines
2.2 KiB
Plaintext
87 lines
2.2 KiB
Plaintext
<?php
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// Run an external 'MRTG-compatible' script, and return it's values
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// TARGET !/usr/local/bin/qmailmrtg7 t /var/log/qmail
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// MRTG Target scripts return 4 lines of text as output:
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// 'Input' value - interpreted as a byte count (so multiplied by 8)
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// 'Output' value - interpreted as a byte count (so multiplied by 8)
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// 'uptime' as a string
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// 'name of targer' as a string
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// we ignore the last two
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// NOTE: Obviously, if you allow anyone to create maps, you are
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// allowing them to run ANY COMMAND as the user that runs
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// weathermap, by using this plugin. This might not be a
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// good thing.
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// If you want to allow only one command, consider making
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// your own datasource plugin which only runs that one command.
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class WeatherMapDataSource_external extends WeatherMapDataSource {
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function Recognise($targetstring)
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{
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if(preg_match("/^!(.*)$/",$targetstring,$matches))
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{
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return TRUE;
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}
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else
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{
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return FALSE;
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}
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}
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function ReadData($targetstring, &$map, &$item)
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{
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$data[IN] = NULL;
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$data[OUT] = NULL;
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$data_time = 0;
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if(preg_match("/^!(.*)$/",$targetstring,$matches))
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{
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$command = $matches[1];
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wm_debug("ExternalScript ReadData: Running $command\n");
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// run the command here
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if( ($pipe = popen($command,"r")) === false)
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{
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wm_warn("ExternalScript ReadData: Failed to run external script. [WMEXT01]\n");
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}
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else
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{
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$i=0;
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while( ($i <5) && ! feof($pipe) )
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{
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$lines[$i++] = rtrim(fgets($pipe,1024));
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}
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pclose($pipe);
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if($i==5)
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{
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$data[IN] = floatval($lines[0]);
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$data[OUT] = floatval($lines[1]);
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$item->add_hint("external_line1",$lines[0]);
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$item->add_hint("external_line2",$lines[1]);
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$item->add_hint("external_line3",$lines[2]);
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$item->add_hint("external_line4",$lines[3]);
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$data_time = time();
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}
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else
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{
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wm_warn("ExternalScript ReadData: Not enough lines read from external script ($i read, 4 expected) [WMEXT02]\n");
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}
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}
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}
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wm_debug ("ExternalScript ReadData: Returning (".($data[IN]===NULL?'NULL':$data[IN]).",".($data[OUT]===NULL?'NULL':$data[OUT]).",$data_time)\n");
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return( array($data[IN], $data[OUT], $data_time) );
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}
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}
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// vim:ts=4:sw=4:
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?>
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