KernelUpdateScriptGenerator

#!/usr/bin/php
<?php
// This is a client side php script, as such it needs the php5-cli or php7.0-cli package to work
// This script generates a bash script
$NO_RC=false;
$NO_Header=false;
$version=false;
$r=false;
$k=false;
$l=false;
error_reporting(0);
foreach($argv as $key => $val){
	if($val=='-no-rc'||$val=='--no-rc')
		$NO_RC=true;
	else if($val=='-nh'||$val=='--no-header')
		$NO_Header=true;
	else if($val=='-v'||$val=='--version'){
		if(!isset($argv[$key+1]))
			break;
		if(strlen($argv[$key+1])==0)
			continue;
		$version=$argv[$key+1];
		if(!is_numeric(substr($version,0,1)))
			die("$version is not a version number\n");
	}
	else if($val=='-r'||$val=='--release'){
		if(!isset($argv[$key+1]))
			break;
		if(strlen($argv[$key+1])==0)
			continue;
		$r=$argv[$key+1];
	}
	else if($val=='-ar'||$val=='--any-release'){
		$r='*';
	}
	else if($val=='-k'||$val=='-f'||$val=='--force'){
		$k='1.0.0-1-generic';// Very low fake kernel version to ensure new kernel is found
	}
	else if ($val=='--debug'){
		error_reporting(E_ALL & ~E_DEPRECATED & ~E_STRICT);
	}
	else if($val=='-l'||$val=='--lowlatency'||$val=='--low-latency'){
		$l=true;
	}
	else if($val=='-h'||$val=='--help'){
		$script=strrpos($_SERVER["SCRIPT_NAME"],'/');
		if(!is_bool($script))
			$script=substr($_SERVER["SCRIPT_NAME"],$script+1);
		else
			$script=$_SERVER["SCRIPT_NAME"];
		echo "Options:\n\t-no-rc, --no-rc\n\t\tSets the script to ignore Release Candidate versions\n";
		echo "\t-f, --force\n\t\tTells the script to generate a installer regardless of the current running kernel\n";
		echo "\t-r, --release\n\t\tOverrides the release version\n".
			"\t\t\teg: `".$script." -r raring`\n".
			"\t\tWould mean to a only kernels for Raring even if you are using Quantal\n".
			"\t\t\teg: `".$script." -r \\*`\n".
			"\t\tWould mean any release, the asterisk needs to be escaped (backslash or single quotes)\n".
			"\t\tThis option defaults to the system's release codename, ".substr(shell_exec('lsb_release -sc'),0,-1)."\n";
		echo "\t-ar, --any-release\n\t\tTells the script to accept kernels for any release series, same as -r \\*\n";
		echo "\t-v, --version\n\t\tIs used to specify version series\n".
			"\t\t\teg: `".$script." -v 3.8`\n".
			"\t\tWould mean to a only accept kernels starting with 3.8 in the version number\n";
		echo "\t-l, --low-latency\n\t\tTells the script to use low-latency kernels instead of generic (experimental)\n";
		echo "\t-nh, --no-header\n\t\tTells the script to not download the linux header packages (experimental)\n";
		echo "\t-h, --help\n\t\tShow this documentation of command options";
		die("\n");
	}
}
if(is_bool($r))
	$r=substr(shell_exec('lsb_release -sc'),0,-1);
if(is_bool($k))
	$k=substr(shell_exec("uname -r"),0,-1);
echo "#!/bin/bash\n\n";
echo "echo 'Config Notes:'\n";
echo "echo -e '\\t".(!$NO_RC?"Accept":"Reject")."ing Release Candidates'\n";
echo "echo -e '\\tAccepting Latest".(is_bool($version)?'':' '.$version)." Kernel'\n";
echo "echo -e '\\tAccepting kernels compiled for $r'\n";
echo "echo -e '\\tAccepting kernels with a version higher than $k'\n";
echo "echo -e '\\tAccepting ".($l?'lowlatency':'generic')." kernels'\n";
echo "echo -e '\\t".($NO_Header?'Excluding':'Including')." kernel headers'\n";
$url="https://kernel.ubuntu.com/~kernel-ppa/mainline/";
$html=file_get_contents($url);
for($i=1;$i<21;$i=$i+1){
	$html=file_get_contents($url);
	if(strlen($html)==0)
		shell_exec("notify-send --icon error 'Kernel Update Checker' 'Unable to connect to kernel.ubuntu.com\\nAttempt $i/20'");
	else
		break;
	shell_exec("sleep 11");
}
if(strlen($html)==0)
	die("echo 'No Internet Access'\nexit\n");
$DOM=new DOMDocument;
$DOM->loadHTML($html);
$links=$DOM->getElementsByTagName('a');
$arr=array();
$arr2=array();
$k=explode('-',$k);
if(substr($k[0],-2)=='.0')
	$k[0]=substr($k[0],0,-2);
if(!is_bool(strpos($k[1],'rc')))
	$k=$k[0].'-'.substr($k[1],strpos($k[1],'rc'));
else
	$k=$k[0];
$dir='';
for ($i = 5; $i < $links->length; $i++){// 5 is the 1st file in directory
	$name=substr($links->item($i)->nodeValue,0,-1);
	if(substr($name,0,1)!='v')// Not a kernel version
		continue;
	$name=substr($name,1);
	if(strpos($name,$r)>0||$r=='*'){
		if(($NO_RC && strpos($name,'-rc')>0)||(!is_bool($version) && substr($name,0,strlen($version))!=$version))
			continue;
		if(strrpos($name,'-')===false)
			$name2=$name;
		else{
			$name2=strrpos($name,'-');
			$name2=substr($name,$name2);
			if(substr($name2,0,3)=="-rc")
				$name2=$name;
			else
				$name2=substr($name,0,$r=='*'?strrpos($name,'-'):strpos($name,"-$r"));
		}
		if(version_compare($name2,$k)==1){
			$k=$name2;
			array_push($arr,$name2);
			array_push($arr2,'v'.$name.'/');
		}
	}
}
if(count($arr)>0){
	$k=$arr[count($arr)-1];
	shell_exec("notify-send --icon info 'Update Available' 'Kernel $k is available.'");
	$url=substr($url.$arr2[count($arr2)-1],0,-1)."/";
	if(version_compare($k,'5.7.2')>-1){
		$arch=trim(shell_exec('dpkg --print-architecture'));
		$url.="$arch/";
	}
	$html=@file_get_contents($url);
	if(!$html){
		echo "echo 'Fatal Error: Failed to load content from $url'";
		shell_exec("notify-send --icon info 'Fatal Error' 'Failed to load content from url'\n");
		die("exit\n");
	}
	$DOM=new DOMDocument;
	$DOM->loadHTML($html);
	$links=$DOM->getElementsByTagName('table')->item(0)->getElementsByTagName('a');
	for ($i = 5; $i < $links->length; $i++){// 5 is the 1st file in directory
		$name=$links->item($i)->nodeValue;
		if(strpos($name,'.deb')>0)
			break;
	}
	$name=substr($name,strpos($name,'_')+1,-1*strlen(substr($name,strrpos($name,'_'))));
	$a=substr($name,0,strrpos($name,'.'));
	$b=substr($name,strrpos($name,'.')+1);
}
else
	die("exit\n");
echo "\nWHERE=\"$url\"\n";
echo "VER_A=\"$a\"\n";
echo "VER_B=\"$b\"\n";
echo "VER_C=\"".str_replace(Array('-generic','-lowlatency'),'',substr(shell_exec("uname -r"),0,-1))."\"\n";
echo "NoHeader=".($NO_Header?1:0)."\n\n";
?>
echo -e '\nInformation:'
echo -e "\tOrigin: \n\t\t$WHERE\n\tKernel Version:\n\t\t$VER_A"
echo -e "\tRelease Date:\n\t\t${VER_B:0:4}/${VER_B:4:2}/${VER_B:6:2} @ ${VER_B:8:2}:${VER_B:10:2} (YYYY/MM/DD @ HH:MM)"
echo -e "\tInstall Linux Header Package:\n\t\t<?php echo $NO_Header?'No':'Yes'; ?>"
echo -e "Notes:"
echo -e "\tKernels built as of July 11, 2016 do not have a target release,\n\t\tplease use the --any-release option to get the latest kernel"

if [ "$1" == "--uninstall" ];then
	if [ "$VER_A" == "$VER_C" ];then
		echo -e "WARNING:\n\tYou are about to un-install the current running kernel,\n\tif you don't have a replacement kernel installed,\n\tyou will not be able to boot."
	fi
	if [ $(dpkg-query -l "linux-image-extra-$VER_A-generic" > /dev/null 2>&1;echo $?) -eq 0 ];then
		sudo apt-get purge linux-{image-extra,headers,image,image-unsigned,modules}-$VER_A-<?php echo ($l?'lowlatency':'generic'); ?> linux-headers-$VER_A
	else
		sudo apt-get purge linux-{headers,image,image-unsigned,modules}-$VER_A-<?php echo ($l?'lowlatency':'generic'); ?> linux-headers-$VER_A
	fi
	exit
elif [ "$1" == "--silent" ];then
	auto=1
else
	auto=0
fi
if [ "$1" == "--download-only" ];then
	download=1
else
	download=0
fi
if [ -n "$2" ];then
	if [ "$2" == "--download-only" ];then
		download=1
	elif [ "$2" == "--silent" ];then
		auto=1
	fi
fi

LOC="/tmp/kernel-$VER_A"
if [ -d "$LOC" ];then
	clear
	echo -e "Warning: This script has been run already\nFiles are in $LOC\nDelete existing downloads? (y=Yes, n=No) (y)"
	if [ $auto -eq 0 ];then
		read action
	else
		action="n"
	fi
	if [ ! "$action" == "n" ];then
		rm $LOC/* > /dev/null
	fi
else
	mkdir $LOC
fi
cd $LOC
arch=$(dpkg --print-architecture)
echo "Care to look at the change log? (y=Yes, n=No) (n)"
if [ $auto -eq 0 ];then
	read action
else
	action="n"
fi
if [ "$action" == "y" ];then
	curl $WHERE/CHANGES 2> /dev/null | less
	echo "Now that you read the change log, do you want to upgrade (y=Yes, n=No) (y)"
	read action
	if [ "$action" == "n" ];then
		exit
	fi
fi
# If I don't need the header package do I need the image-extra package?
# amd64 kernels are signed as of 4.17-rc2, 201804152230 is the dt for 4.17-rc1
if [[ "$arch" == "amd64" && ($VER_B -gt 201804152230) ]]; then
	image="image-unsigned"
else
	image="image"
fi
echo "A 404 error is not a problem here"
if [ $NoHeader -eq 1 ];then
	wget -nc $WHERE/linux-{image-extra,$image,modules}-$VER_A-<?php echo ($l?'lowlatency':'generic'); ?>_$VER_A."$VER_B"_$arch.deb
else
	wget -nc $WHERE/linux-headers-$VER_A"_$VER_A"."$VER_B"_all.deb
	wget -nc $WHERE/linux-{image-extra,headers,$image,modules}-$VER_A-<?php echo ($l?'lowlatency':'generic'); ?>_$VER_A."$VER_B"_$arch.deb
fi
clear
total=$(ls linux-*.deb | wc -l)
if [ $NoHeader -eq 1 ];then
	total=$(($total+2))
else
	# If anyone has a better way please suggest it in a bug report
	libssl="$(dpkg -I ./linux-headers-$VER_A-<?php echo ($l?'lowlatency':'generic'); ?>_$VER_A."$VER_B"_$arch.deb | grep '^ Depends:' | cut -d':' -f2| sed 's/,/\n/g' | grep libssl | awk '{print $1}')"
	if [ -n "$libssl" ];then
		# libssl is required
		if [ $(dpkg-query -l "$libssl" > /dev/null 2>&1;echo $?) -eq 1 ];then
			# libssl is not installed
			if [ $(apt-cache show $libssl 2&> /dev/null;echo $?) -eq 0 ];then
				# Package is available for installation
				if [ $download -eq 0 ];then
					# Install libssl
					if [ $auto -eq 1 ];then
						sudo apt-get install $libssl -y
					else
						sudo apt-get install $libssl
					fi
				else
					# Download only
					apt-get download $libssl
				fi
			else
				echo "Warning: $libssl is required but has no installation candidate"
				echo -e "\e[41mLinux Headers will NOT be installed!!!\e[0m"
				echo "The linux headers packages is only needed for a few things like nvidia drivers and virtualbox-dkms"
				echo "If you do need that you may want to use the --no-header option"
				if [[ ( $download -eq 0 ) && ( $auto -eq 0 ) ]];then
					echo -e "\n\nAbort installation? (y=Yes, n=No) (y)"
					read action
					if [ "$action" != "n" ];then
						exit 1
					fi
				fi
				if [ $download -eq 0 ];then
					rm ./linux-headers-$VER_A-<?php echo ($l?'lowlatency':'generic'); ?>_$VER_A."$VER_B"_$arch.deb
					rm ./linux-headers-$VER_A"_$VER_A"."$VER_B"_all.deb
				fi
			fi
		fi
	fi
fi
if [ $VER_B -gt 201806032309 ];then
	total=$(($total-1))
fi
if [[ $total -eq 3 && ( $VER_B -gt 201304080035 || $VER_B -lt 201206041411 ) ]];then
	# Don't feel like inverting the above line and merging it with the line that is on this line plus two, so enjoy my sense of humor
	echo -e "Greetings $USER\n  I ($(hostname)) am now self aware and a sentient being, have a nice day.\n  Oh and by the way SKYNET is now active.\n"
elif [ $total -ne 4 ];then
	echo -e "Failed to download all needed files\nFiles are in $LOC\nGet files from $WHERE\n\nThere should be 4 files, 3 ending with '$arch.deb' and 1 with 'all.deb'\nHere is what we have:"
	ls $LOC
	echo -e "\nYou can install what you have by running this command:\n\tsudo dpkg -i $LOC/*.deb\nJust be prepared for broken packages."
	exit 1
fi
if [ $download -eq 1 ];then
	echo -e "Packages have been downloaded to $LOC\nHere is a list:"
	ls $LOC
	exit 0
fi
echo "Installing Linux $VER_A:"
sudo dpkg -i ./*.deb
if [ -d /lib/modules/$VER_A-<?php echo ($l?'lowlatency':'generic'); ?> ];then
	echo -e "\nThe New Kernel looks to have been installed"
	if [ $auto -eq 0 ] && [ "$VER_A" != "$VER_C" ];then
		echo -e "\nWARNING: If the new kernel does not boot you may regret saying yes here.\nWould you like to remove the current one? (y=Yes, n=No) (n)"
		read action
	else
		action="n"
	fi
	if [ "$action" == "y" ];then
		sudo apt-get purge linux-{image-extra,headers,$image}-$VER_C-<?php echo ($l?'lowlatency':'generic'); ?> linux-headers-$VER_C
		if [ $(dpkg-query -l "linux-image-extra-$VER_C-<?php echo ($l?'lowlatency':'generic'); ?>" > /dev/null 2>&1;echo $?) -eq 0 ];then
			sudo apt-get purge linux-{image-extra,headers,$image}-$VER_A-<?php echo ($l?'lowlatency':'generic'); ?> linux-headers-$VER_C
		else
			sudo apt-get purge linux-{headers,$image}-$VER_C-<?php echo ($l?'lowlatency':'generic'); ?> linux-headers-$VER_C
		fi
	fi
else
	echo -e "Looks like the kernel was not installed for some reason\nI don't see it in /lib/modules"
fi
echo -e "\n\nAre you ready to Reboot? (y=Yes, n=No) (n)"
if [ $auto -eq 0 ];then
	read action
else
	action="n"
fi
if [ "$action" == "y" ];then
	sudo reboot
fi
exit