1 files changed, 157 insertions, 0 deletions
diff --git a/admin/bcheck.pl b/admin/bcheck.pl
new file mode 100644
index 0000000..cca973e
--- /dev/null
+++ b/admin/bcheck.pl
@@ -0,0 +1,157 @@
+#!/usr/bin/perl -w
+
+use DB_File;
+use Fcntl ':flock';
+
+if (!defined($ARGV[0])) {
+    print "usage: requires .class dump as parameter!\n";
+    exit;
+}
+
+sub bailout
+{
+    untie %bcheckdb if(defined(%bcheckdb));
+
+    if(defined(MYLOCK)) {
+        flock MYLOCK, LOCK_UN;
+        close(MYLOCK);
+    }
+
+    print @_;
+    exit 5;
+}
+
+sub ask_user
+{
+    my ($dbkey, $dbchunk) = @_;
+
+    if (defined($ENV{"BCHECK_UPDATE"})) {
+        $bcheckdb{$dbkey} = $dbchunk;
+        return;
+    }
+
+    &bailout("BC problem detected") if (! -t STDIN);
+
+    print "(I)gnore / (Q)uit / (U)pdate: ";
+
+    my $key;
+    while(defined(read STDIN, $key, 1)) {
+        $key = lc($key);
+
+        print "got: >$key<\n";
+
+        return if ($key eq 'i');
+
+        &bailout("BC problem. aborted") if ($key eq 'q');
+
+        if ($key eq 'u') {
+            $bcheckdb{$dbkey} = $dbchunk;
+            return;
+        }
+        print "\n(I)gnore / (Q)uit / (U)pdate: ";
+    }
+}
+
+sub diff_chunk($$)
+{
+    my ($oldl, $newl) = @_;
+    my @old = split /^/m, $oldl;
+    my @new = split /^/m, $newl;
+    my $haschanges = 0;
+    my $max = $#old > $#new ? $#old : $#new;
+
+    die "whoops. key different" if ($old[0] ne $new[0]);
+
+    if ($#old != $#new) {
+        warn ("Structural difference.\n");
+        print @old;
+        print "-----------------------------------------------\n";
+        print @new;
+        $haschanges = 1;
+        return $haschanges;
+    }
+
+    print $old[0];
+
+    my ($class) = ($old[0] =~ /^(?:Class |Vtable for )(\S+)/);
+
+    my $c = 1;
+    while ($c < $max) {
+        my ($o, $n) = ($old[$c], $new[$c]);
+        chomp $o;
+        chomp $n;
+        $c++;
+        next if ($o eq $n);
+
+        if(defined($class) and $n =~ /^(\d+\s+)\w+(::\S+\s*.*)$/) {
+            next if ($n eq "$1$class$2");
+        }
+
+        $haschanges = 1;
+
+        print "-$o\n+$n\n\n";
+    }
+
+    return $haschanges;
+}
+
+local $dblock = $ENV{"HOME"} . "/bcheck.lock";
+my $dbfile = $ENV{"HOME"} . "/bcheck.db";
+my $cdump  = $ARGV[0];
+
+die "file $cdump is not readable: $!" if (! -f $cdump);
+
+# make sure the advisory lock exists
+open(MYLOCK, ">$dblock");
+print MYLOCK "";
+
+flock MYLOCK, LOCK_EX;
+
+tie %bcheckdb, 'DB_File', $dbfile;
+
+my $chunk = "";
+
+open (IN, "<$cdump") or die "cannot open $cdump: $!";
+while (<IN>) {
+
+    chop;
+
+    s/0x[0-9a-fA-F]+/0x......../g;
+    s/base size=/size=/g;
+    s/\(\)\s*$//g;
+    s/base align=/align=/g;
+
+    $chunk .= $_ . "\n";
+
+    if(/^\s*$/) {
+        my @lines = split /^/m, $chunk;
+        my $key = $lines[0];
+        chomp $key;
+
+        if($key !~ /<anonymous struct>/ &&
+           $key !~ /<anonymous union>/) {
+            if(defined($bcheckdb{$key})) {
+                my $dbversion = $bcheckdb{$key};
+
+                if($dbversion ne $chunk) {
+                     &ask_user($key, $chunk) if(&diff_chunk($dbversion, $chunk));
+                }
+            }
+            else {
+                $bcheckdb{$key} = $chunk;
+                print "NEW: $key\n";
+            }
+        }
+
+        $chunk = "";
+        next;
+    }
+
+}
+close(IN);
+
+untie %bcheckdb;
+flock MYLOCK, LOCK_UN;
+close(MYLOCK);
+
+exit 0;