* Remove obsolete directory.
This commit is contained in:
Eelco Dolstra
parent
7bba67c401
commit
eb94581d39
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@ -1,252 +0,0 @@
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#! /usr/bin/perl -w -I /home/eelco/.nix-profile/lib/site_perl
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use strict;
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use XML::LibXML;
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#use XML::Simple;
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my $blacklistFN = shift @ARGV;
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die unless defined $blacklistFN;
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my $userEnv = shift @ARGV;
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die unless defined $userEnv;
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# Read the blacklist.
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my $parser = XML::LibXML->new();
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my $blacklist = $parser->parse_file($blacklistFN)->getDocumentElement;
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#print $blacklist->toString() , "\n";
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# Get all the elements of the user environment.
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my $userEnvElems = `nix-store --query --references '$userEnv'`;
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die "cannot query user environment elements" if $? != 0;
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my @userEnvElems = split ' ', $userEnvElems;
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my %storePathHashes;
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sub getElemNodes {
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my $node = shift;
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my @elems = ();
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foreach my $node ($node->getChildNodes) {
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push @elems, $node if $node->nodeType == XML_ELEMENT_NODE;
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}
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return @elems;
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}
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my %referencesCache;
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sub getReferences {
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my $path = shift;
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return $referencesCache{$path} if defined $referencesCache{$path};
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my $references = `nix-store --query --references '$path'`;
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die "cannot query references" if $? != 0;
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$referencesCache{$path} = [split ' ', $references];
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return $referencesCache{$path};
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}
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my %attrsCache;
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sub getAttr {
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my $path = shift;
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my $name = shift;
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my $key = "$path/$name";
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return $referencesCache{$key} if defined $referencesCache{$key};
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my $value = `nix-store --query --binding '$name' '$path' 2> /dev/null`;
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$value = "" if $? != 0; # !!!
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chomp $value;
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$referencesCache{$key} = $value;
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return $value;
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}
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sub evalCondition;
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sub traverse {
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my $done = shift;
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my $set = shift;
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my $path = shift;
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my $stopCondition = shift;
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return if defined $done->{$path};
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$done->{$path} = 1;
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$set->{$path} = 1;
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# print " in $path\n";
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if (!evalCondition({$path => 1}, $stopCondition)) {
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# print " STOPPING in $path\n";
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return;
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}
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# Get the requisites of the deriver.
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foreach my $reference (@{getReferences $path}) {
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traverse($done, $set, $reference, $stopCondition);
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}
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}
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sub evalSet {
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my $inSet = shift;
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my $expr = shift;
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my $name = $expr->getName;
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if ($name eq "traverse") {
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my $stopCondition = (getElemNodes $expr)[0];
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my $done = { };
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my $set = { };
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foreach my $path (keys %{$inSet}) {
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traverse($done, $set, $path, $stopCondition);
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}
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return $set;
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}
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else {
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die "unknown element `$name'";
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}
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}
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# Function for evaluating conditions.
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sub evalCondition {
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my $storePaths = shift;
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my $condition = shift;
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my $elemName = $condition->getName;
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if ($elemName eq "containsSource") {
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my $hash = $condition->attributes->getNamedItem("hash")->getValue;
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foreach my $path (keys %{$storePathHashes{$hash}}) {
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return 1 if defined $storePaths->{$path};
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}
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return 0;
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}
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elsif ($elemName eq "hasName") {
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my $nameRE = $condition->attributes->getNamedItem("name")->getValue;
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foreach my $path (keys %{$storePaths}) {
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return 1 if $path =~ /$nameRE/;
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}
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return 0;
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}
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elsif ($elemName eq "hasAttr") {
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my $name = $condition->attributes->getNamedItem("name")->getValue;
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my $valueRE = $condition->attributes->getNamedItem("value")->getValue;
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foreach my $path (keys %{$storePaths}) {
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if ($path =~ /\.drv$/) {
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my $value = getAttr($path, $name);
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# print " $path $name $value\n";
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return 1 if $value =~ /$valueRE/;
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}
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}
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return 0;
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}
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elsif ($elemName eq "and") {
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my $result = 1;
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foreach my $node (getElemNodes $condition) {
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$result &= evalCondition($storePaths, $node);
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}
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return $result;
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}
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elsif ($elemName eq "not") {
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return !evalCondition($storePaths, (getElemNodes $condition)[0]);
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}
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elsif ($elemName eq "within") {
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my @elems = getElemNodes $condition;
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my $set = evalSet($storePaths, $elems[0]);
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return evalCondition($set, $elems[1]);
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}
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elsif ($elemName eq "true") {
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return 1;
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}
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elsif ($elemName eq "false") {
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return 0;
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}
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else {
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die "unknown element `$elemName'";
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}
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}
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sub evalOr {
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my $storePaths = shift;
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my $nodes = shift;
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my $result = 0;
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foreach my $node (@{$nodes}) {
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$result |= evalCondition($storePaths, $node);
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}
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return $result;
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}
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# Iterate over all elements, check them.
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foreach my $userEnvElem (@userEnvElems) {
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# Get the deriver of this path.
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my $deriver = `nix-store --query --deriver '$userEnvElem'`;
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die "cannot query deriver" if $? != 0;
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chomp $deriver;
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if ($deriver eq "unknown-deriver") {
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# print " deriver unknown, cannot check sources\n";
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next;
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}
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print "CHECKING $userEnvElem\n";
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# Get the requisites of the deriver.
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# my $requisites = `nix-store --query --requisites --include-outputs '$deriver'`;
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# die "cannot query requisites" if $? != 0;
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# my @requisites = split ' ', $requisites;
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# Get the hashes of the requisites.
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# my $hashes = `nix-store --query --hash @requisites`;
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# die "cannot query hashes" if $? != 0;
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# my @hashes = split ' ', $hashes;
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# for (my $i = 0; $i < scalar @requisites; $i++) {
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# die unless $i < scalar @hashes;
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# my $hash = $hashes[$i];
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# $storePathHashes{$hash} = {} unless defined $storePathHashes{$hash};
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# my $r = $storePathHashes{$hash}; # !!! fix
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# $$r{$requisites[$i]} = 1;
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# }
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# Evaluate each blacklist item.
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foreach my $item ($blacklist->getChildrenByTagName("item")) {
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my $itemId = $item->getAttributeNode("id")->getValue;
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# print " CHECKING FOR $itemId\n";
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my $condition = ($item->getChildrenByTagName("condition"))[0];
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die unless $condition;
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# Evaluate the condition.
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my @elems = getElemNodes $condition;
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if (evalOr({$deriver => 1}, \@elems)) {
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# Oops, condition triggered.
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my $reason = ($item->getChildrenByTagName("reason"))[0]->getChildNodes->to_literal;
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$reason =~ s/\s+/ /g;
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$reason =~ s/^\s+//g;
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print " VULNERABLE TO `$itemId': $reason\n";
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}
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}
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}
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