#!/usr/bin/php4 -q
<?php
	header("Content-Type: text/plain");
	
	echo "Getting list of kernel versions...";
	include("kernel_version.inc");
	echo "done.\n";
	
	$home="/var/rsync/kernel";
	
	function checkDir($dir) {
		if (!file_exists($dir))
			mkdir($dir,0755);
	}
	
	function download($remote,$local) {
		$result = true;
		
		/*if (!$rh = fopen($remote,"r")) {
			echo "fopen failed " . __LINE__ . "\n";
			return false;
		}
		
		if (!$lh = fopen($local,"w")) {
			echo "fopen failed " . __LINE__ . "\n";
			return false;
		}
		
		$buf = "";
		while (!feof($rh)) {
			$buf = fread($rh, 4096);
			fwrite($lh,$buf);
		}
		
		fclose($rh);
		fclose($lh);*/
		
		echo "Downloading \"$remote\"...\n";
		
		if (file_exists($local))
			$result = system("wget -q -c -O $local $remote");
		else
			$result = system("wget -q -O $local $remote");
		
		$result = !$result;
		return $result;
	}
	
	function getLocalVersion($name) {
		global $home;
		if (file_exists("$home/$name/Makefile"))
			$result = trim(`awk -F '=' '/^VERSION/{v=$2} /^PATCHLEVEL/{p=$2} /^SUBLEVEL/{s=$2} /^EXTRAVERSION/{e=$2} END { printf("%s.%s.%s%s\\n", v, p, s, e) }' $home/$name/Makefile | sed "s/ //g"`);
		else
			$result = "(none available)";
		
		return $result;
	}
	
	function getSource($k) {
		global $home;
		
		checkDir("$home/tmp");
		
		$localfile = "$home/tmp/" . basename($k->srcurl);

		if (!download($k->srcurl,$localfile)) {
			echo "download failed " . __LINE__ . "\n";
			return false;
		}
		
		chdir("$home/tmp");
		
		echo "Decompressing archive...";
		echo "calling popen()...";
		$ph = popen("tar vxjf $localfile","r");
		echo "done.\n";
		echo "calling fgets()...";
		$resultFolder = trim(fgets($ph,64));
		echo "done.\n";
		print_r($ph);
		echo "calling pclose()...";
		pclose($ph);
		echo "done.\n";
		
		
		echo "(errors above can be ignored)\n";
		echo "Archive's primary directory: $resultFolder\n";
		
		echo "Decompressing archive...";
		//`tar xjf $localfile`;
		echo "done.\n";
		
		echo "Cleaning up...";
		`rm -rf $home/$k->name`;
		rename("$home/tmp/$resultFolder","$home/$k->name");
		//unlink($localfile);
		echo "done.\n";
	}
	
	for ($i=0; $i<count($kernel); $i++) {
		$k = $kernel[$i];
		
		$localv = getLocalVersion($k->name);
		
		if (empty($k->parent)) {
			//print_r($k);
			if (!empty($k->version)) {
				if ($localv != $k->version) {
					echo "Updating \"$k->name\" source: $localv to $k->version...\n";
					getSource($k);
				} else {
					echo "Source \"$k->name\" is up-to-date ($localv).\n";
				}
			} else {
				echo "No remote version found for $k->name!\n";
			}
		}
	}
?>