X-Git-Url: http://git.indexdata.com/?p=git-tools-moved-to-github.git;a=blobdiff_plain;f=aptcheck%2Faptcheck.pl;h=3121946ce18316788f8bf688984878e24602681e;hp=23dab9d3a9290378337e81d8d3f524ef3a9e6fb2;hb=114cf0ae412ff4d23ff7488db783d1bd1ed8197b;hpb=fb0a04d2b6adb5906df39518729087f8c4d0254f

diff --git a/aptcheck/aptcheck.pl b/aptcheck/aptcheck.pl
index 23dab9d..3121946 100755
--- a/aptcheck/aptcheck.pl
+++ b/aptcheck/aptcheck.pl
@@ -5,44 +5,240 @@
 # Depends heavily on having ssh key authentication set up to all
 # boxes. That's why I run it on my own workstation.
 #
+# Regular debian upgrades are detected by running 
+#  apt-get upgrade -s
+# on every machine, and parsing the output.
+
+# We have decided to maintain some packages manually on some 
+# machines, so that system-level upgrades will not disturb 
+# applications, which may need more hand-holding. These are
+# extracted from our apt repository, and queried on every 
+# server with apt-cache policy. This way, as soon as a package
+# is released on our repo, it will get listed here.
+#
 # 11-Mar-2011 Heikki: Started this
+# 22-Mar-2011 Heikki: Adding manually maintained packages
+# 15-Aug-2011 Heikki: Adding a total in the headline, for nagiosgrapher
+# 21-May-2012 Heikki: Added a date since when a package has been pending
+# 31-May-2012 Heikki: Pointing to the new wiki
+# 01-Jan-2013 Heikki: Get hosts from nagios-us as well.
+#
+# TODO: Assumes that we release our restricted packages for all versions
+# and architectures at the same time. Gets only the highest version from
+# all, and reports anything less than this. Good enough for now.
+#
 
 #### Init
+use strict;
 my $debug= $ARGV[0] || 0; # 0=none, 1=some, 2=more, 3=much
 my $year =`date +%Y`;
-my $wikilink = 'http://twiki.indexdata.dk/cgi-bin/twiki/view/ID/';
+#my $wikilink = 'http://twiki.indexdata.dk/cgi-bin/twiki/view/ID/';
+my $wikilink = 'https://twiki.indexdata.com/twiki/bin/view/ID/';
+my $restrictedpackages = "ssh -q kebab cat /home/ftp/pub/debian/dists/*/restricted/*/Packages";
+my $updlink="<i>-u</i>"; # to display after a name, liking to the upd page
+
+#### Host comments
+my %hostcomments = (
+      "ariel"    => "<i>Niels Erik</i> does the manual upgrades",
+      "bellone"  => "<i>Niels Erik</i> does the manual upgrades",
+      "cfrepous" => "<i>Wolfram</i> does the manual upgrades",
+      "leopard"  => "<i>Wolfram</i> does the manual upgrades",
+      "lsd"      => "<i>Heikki</i> takes care of all upgrades",
+      );
+      
 
 #### Get list of hosts
 # I could use a hard-coded list, but I would forget to maintain it.
-# Nagios knows most of our hosts.
+# Nagios knows most of our hosts. It even knows which are worth 
+# checking, they have a command to check apts!
+print "Getting hostlist from nagios\n" if $debug;
+my $hostlist1 = `ssh nagios grep -l Apt /etc/nagios3/indexdata-conf.d/*.cfg`
+  or die "Could not get host list from nagios (dk)";
 
-my $hostlist = `ssh nagios grep -l Apt /etc/nagios3/indexdata-conf.d/*.cfg`
-  or die "Could not get host list";
+print "Getting hostlist from nagios-us\n" if $debug;
+my $hostlist2 = `ssh nagios-us grep -l Apt /etc/nagios3/indexdata-conf.d/*.cfg`
+  or die "Could not get host list from nagios (dk)";
 
+my $hostlist = $hostlist1 . $hostlist2;
 print "Got list:\n$hostlist\n" if $debug>2;
-my $table = "<table>\n";
+
+###### Get list of packages that can be manually maintained
+print "getting restricted package versions\n" if $debug;
+my %restrpkgs;
+my $restplines = `$restrictedpackages`
+  or die "Could not get the list of restricted packages " .
+         "from $restrictedpackages: $! ";
+print "Got package list: \n$restplines\n" if $debug>2;
+my $pname;
+my $pver;
+for my $pline ( split("\n",$restplines) ) {
+    chomp($pline);
+    $pname = $1 if $pline =~ /^Package:\s+(\S*)\s*$/;
+    $pver = $1 if $pline =~ /^Version:\s+(\S*)\s*$/;
+    print "$pline: p=$pname v=$pver\n" if $debug>2;
+    if ( $pname && $pver ) {
+        print "\nPackage $pname version $pver \n" if $debug>2;
+        if ( ! $restrpkgs{$pname} ) {
+            $restrpkgs{$pname} = $pver;
+            print "found $pname, first version $pver\n" if $debug>1;
+        } else {
+            my $bver = $restrpkgs{$pname};
+            `dpkg --compare-versions "$bver" lt "$pver" 2>/dev/null `;
+            if ( ! $? ) {
+                print "found $pname, better version $pver (better than $bver)\n"
+                    if $debug>1;
+                $restrpkgs{$pname} = $pver;
+            } else {
+                print "found $pname, but version $pver is no better than $bver\n"
+                    if $debug>2;
+            }
+        }
+        $pname = ""; # clear for the next one.
+        $pver = "";
+    }
+}
+
+print "got " . scalar(keys(%restrpkgs)) . " restricted packages\n" if $debug;
+if ( $debug >1 ) {
+    for $pname ( sort (keys(%restrpkgs)) ) {
+        print "  $pname " . $restrpkgs{$pname} . "\n";
+    }
+}
+
+# Statistics
 my %summary;
-my %sechosts;
-my %secpkgs;
-for $hline ( split("\n",$hostlist) ) {
-    next unless ( $hline =~ /\/([a-z0-9]+)\.cfg$/ );
+my ( %sechosts, %secpkgs );
+my ( %ownhosts, %ownpkgs );
+my ( %manhosts, %manpkgs );
+my ( %normhosts, %normpkgs );
+my %okhosts;
+my %skiphosts;
+my %allhosts;
+my $sectot = 0;
+my $owntot = 0;
+my $mantot = 0;
+my $normtot = 0;
+my %updlinks;
+my %debversions;
+
+# Pending modification dates
+my %olddates;  # Read in from the file
+my %newdates;  # To be written in the new version of the file
+my $datefilename = "aptcheck.data";
+my $dateoldfilename = "aptcheck.old";
+my $thisdate = "*"; # indicates really old stuff
+my $warndate; # Older than this will be boldfaced
+
+if ( -f $datefilename ) {
+  print "Reading dates from $datefilename\n" if $debug;
+  open F, $datefilename or die "Could not open date file $datefilename: $!";
+  while (<F>) {
+    chop();
+    my ($pkg, $date) = split;
+    next unless $pkg;  # skip empty lines
+    $olddates{$pkg} = $date;
+    print "Date for '$pkg' is '$date' \n" if $debug;
+  }
+  close F;
+  $thisdate = `date +%F`;
+  chomp($thisdate);
+  $warndate = `date +%F -d "30 days ago"` ; ;
+  chomp($warndate);
+  print "Dates: now: '$thisdate' warn: '$warndate'\n" if $debug;
+} else {
+  print "No datefile $datefilename found, starting from scratch\n";
+}
+
+
+my $table = "<table>\n";
+
+#for my $hline ( split("\n",$hostlist) ) {
+for my $hline ( sort( split("\n",$hostlist) ) ) {
+    next unless ( $hline =~ /\/([a-z0-9-]+)\.cfg$/ );
     my $H = $1;
     next if ($H =~ /^commands/ );
     next if ($H =~ /^servicegroups/ );
     print "Checking $H\n" if $debug;
-    my $apt = `ssh $H apt-get upgrade -s -o 'Debug::NoLocking=true' `;
+    $allhosts{$H}=1;
+    my $cmd0 = "cat /etc/debian_version";
+    my $cmd1 = "apt-cache -q policy " . join(" ",sort(keys(%restrpkgs)));
+    my $cmd2 = "apt-get upgrade -s -o 'Debug::NoLocking=true' ";
     # Note, do not append -qq, we want some output even when nothing to do
+    print "ssh -q $H \"$cmd0; $cmd1 ; $cmd2 \" 2>/dev/null \n" if ($debug>1);
+    my $apt = `ssh -q $H "$cmd0; $cmd1 ; $cmd2 " 2>/dev/null`;
     if ( !$apt ) {
         $table .= "<tr><td colspan='3'>&nbsp;</td></tr>\n";
         $table .= "<tr><td colspan='3'><b><u>$H</u></b> (skipped)\n";
+        $skiphosts{$H}=1;
         next;
     }
     print "Got apts for $H: \n$apt\n" if $debug>2;
-    my $det = "";
+    my $det = ""; # detail lines
     my $pkgs = 0;
     my $secs = 0;
     my $own = 0;
-    for $p ( split("\n",$apt) ) {
+    my $man = 0;
+    my $restrname = "";
+    my $restrinst = "";
+    my $restrcand = "";
+    my $debver = 0;
+    for my $p ( split("\n",$apt) ) {
+        if ( !$debver ) {  # first line
+          $debver = 1;
+          $p =~ s/(5[0-9.]+)/$1 LENNY !!!/;
+          $p =~ s/(6[0-9.]+)/$1 squeeze/;
+          $p =~ s/(7[0-9.]+)/$1 wheezy/;
+          $p = "&nbsp;Debian $p";
+          $debversions{$H} = $p;
+          print "Deb version for $H is $p\n" if ($debug>1);
+          next;
+        }
+        # parse apt-cache output
+        $restrname = $1 if $p =~ /^(\S+):$/;
+        $restrinst = $1 if $p =~ /^\s+Installed:\s+(\S+)$/;
+        $restrcand = $1 if $p =~ /^\s+Candidate:\s+(\S+)$/;
+        if ( $p =~ /^\s+Version table:/ ) { # have all for that package
+            my $bver = $restrpkgs{$restrname};
+            if ( ( $restrinst eq $restrcand ) &&
+                 ( $restrinst ne $bver ) ) { 
+                # if different, it is a regular apt upgrade, and will be seen
+                # later. AND we want to have a different version in our repo
+                `dpkg --compare-versions "$bver" lt "$restrinst"  2>/dev/null`;
+                if ( $? ) { # It was not a downgrade 
+                            # manual packages may be ahead of the repo!
+                    $mantot++;
+                    $man++;
+                    $pkgs++;
+                    $manhosts{$H} = 1;
+                    $manpkgs{$restrname} = 1;
+                    $det .= "<tr>";
+                    $det .= "<td>&nbsp;&nbsp;$restrname <b>(M)</b></td>";
+                    $det .= "<td>". strdiff($bver,$restrinst)."</td>";
+                    $det .= "<td>". strdiff($restrinst,$bver)."</td>";
+                    my $datekey = "$H:$restrname";
+                    if ( $olddates{$datekey} ) {
+                        $newdates{$datekey} = $olddates{$datekey};
+                    } else {
+                        $newdates{$datekey} = $thisdate;
+                    }
+                    my $dispdate = $newdates{$datekey};
+                    # if ( $dispdate lt $warndate ) {
+                    if ( 0 ) { # manual packages don't need to be highlighted
+                        $dispdate = "<b>$dispdate !</b>";
+                    }
+                    $det .= "<td>" . $dispdate . "</td>";
+                    $det .= "</tr>\n";
+                    my $key = "$restrname";
+                    if ( !$summary{$key} ) {
+                        $summary{$key} = "";
+                    }
+                    $summary{$key} .= "$H ";
+                }
+            }
+            $restrname = ""; # clear for next round
+            $restrinst = "";
+            $restrcand = "";
+        }
         next unless $p =~
             /^Inst ([^ ]+) \[([^]]+)\] \(([^ ]+) ([^:]+):/;
         my ( $pkg,$cur,$new,$src ) = ( $1,$2,$3,$4 );
@@ -51,48 +247,89 @@ for $hline ( split("\n",$hostlist) ) {
         $pkgs++;
         my $key = $pkg;
         if ( $src =~ /Security/ ) {
-            $det .= "<b>$pkg</b>";
-            $key = "<b>$pkg</b>";
-            $sechosts{$H}=1;
-            $secpkgs{$pkg}=1;
+            $det .= "<b>$pkg (s)</b> ";
+            $sechosts{$H} = 1;
+            $secpkgs{$pkg} = 1;
             $secs++;
+            $sectot++;
         } elsif ( $src =~ /Indexdata/ ) {
-            $det .= "<b><i>$pkg</i></b>";
-            $key = "<i>$pkg</i>";
+            $det .= "<i><b>$pkg</b> (id) </i>";
+            $ownhosts{$H}=1;
+            $ownpkgs{$pkg}=1;
             $own++;
+            $owntot++;
         } else {
-            $det .= "$pkg";
+            $det .= "$pkg ";
+            $normhosts{$H}=1;
+            $normpkgs{$pkg}=1;
+            $normtot++;
         }
         if ( !$summary{$key} ) {
             $summary{$key} = "";
         }
+        $summary{$key} .= "$H ";
         $new = strdiff($cur,$new);
         $cur = strdiff($new,$cur);
-        $summary{$key} .= "$H ";
         $det .= "</td> ";
         $det .= "<td>$cur</td> ";
         $det .= "<td>$new</td> ";
+        my $datekey = "$H:$pkg";
+        if ( $olddates{$datekey} ) {
+            $newdates{$datekey} = $olddates{$datekey};
+        } else {
+            $newdates{$datekey} = $thisdate;
+        }
+        my $dispdate = $newdates{$datekey};
+        if ( ( $dispdate lt $warndate ) && ( $src =~ /Security/) ) {
+            $dispdate = "<b>$dispdate !</b>";
+        }
+        $det .= "<td>" . $dispdate . "</td>";
         $det .= "</tr>\n";
+
     }
-    $table .= "<tr><td colspan='3'>&nbsp;</td></tr>\n";
-    $table .= "<tr><td colspan='3'><b><u>$H</u></b> &nbsp;\n";
+    $table .= "<tr><td colspan='4'>&nbsp;</td></tr>\n";
+    $table .= "<tr><td colspan='4'><a name='$H'><b><u>$H</u></b></a> &nbsp;\n";
     if ( $pkgs ) {
         $table .= "<b>$pkgs</b> packages to upgrade. ";
         $table .= "<b>$secs security</b>. " if $secs;
-        $table .= " $own from indexdata " if $own;
+        $table .= " $own from indexdata. " if $own;
+        $table .= " $man manual. " if $man;
     } else {
         $table .= "ok";
+        $okhosts{$H} = 1;
     }
     my $updlink = $wikilink . ucfirst($H) . "Updates" . $year;
+    # Fix some pages that do not follow the convention.
+    # Mostly because the host names would not make proper WikiWords
+    $updlink =~ s/Bugzilla3Updates/BugzillaUpdates/; 
+    $updlink =~ s/Opencontent-solrUpdates/OpenContentSolrUpdates/; 
+    $updlinks{$H} = $updlink;
     $table .= "&nbsp;<a href='$updlink' >Upd</a>";
+    $table .= "&nbsp;" . $debversions{$H};
     $table .= "</td></tr>\n";
+    $table .= "<tr><td>$hostcomments{$H}</td></tr>\n"
+        if ( $hostcomments{$H} );
     $table .= $det if $pkgs;
     print "\n$table\n" if $debug>2;
-    last if $H =~/dart/ && $debug;
+    last if $H =~/diane/ && $debug;
 }
 $table .= "</table>\n";
 
-# Produce page
+# Save the date file
+if ( ! $debug ) {
+    `mv -f $datefilename $dateoldfilename`;
+    open F, ">$datefilename" or die "Could not open date file $datefilename for writing";
+    for  my $k (sort(keys(%newdates)) ) {
+        print F "$k " . $newdates{$k}. "\n";
+        print "date for '$k' '" . $newdates{$k}. "'\n" if $debug;
+    }
+    close F
+      or die "Could not close date file $datefilename: $!";
+} else {
+    print "Not updating the date file, this is a debug run\n";
+}
+
+# Page header
 my $outfile = "/tmp/aptcheck.html";
 open F, ">$outfile"
     or die "Could not open $outfile for writing: $!";
@@ -100,16 +337,153 @@ print F "<html>\n";
 print F "<head><title>Apt upgrade status</title></head>\n";
 print F "<body>\n";
 print F "<H1>Apt package status</H1>\n";
+print F "<b>" .  ( $sectot + $owntot + $mantot + $normtot ) . 
+        "</b> packages pending (<b>$sectot</b> critical) \n";
+
+print F "<H2>Debug run, many hosts missing!</H2>\n"
+   if $debug;
+
 
-if ( %sechosts ) {
-    print F "<h2>Security updates for " .
-        scalar(keys(%sechosts)) ." hosts: </h2>\n";
-    print F "<b>" . join(" ", sort(keys(%sechosts)))."</b><br/> ".
-        join(" ", sort(keys(%secpkgs))). "<p/>\n";
+# Summary table: one row for per host group
+print F "<p/>\n";
+print F "<table border='1' >\n";
+print F "<tr><td>&nbsp;</td>" ;
+print F "<td><b>Hosts</b></td>\n";
+print F "<td><b>Packages</b></td></tr>\n";
+
+if ( $sectot ) {
+    print F "<tr><td><b>Security</b><br/>" . scalar(keys(%sechosts)) . 
+        "&nbsp;/&nbsp;" .  scalar(keys(%secpkgs)) . "&nbsp;/&nbsp;$sectot </td>\n" ;
+    print F "<td>";
+    for my $HH ( sort(keys(%sechosts)) ) {
+        my $upd = $updlinks{$HH} || "#" ;
+        print F "<a href='#$HH'><b>$HH</b></a><a href='$upd'>$updlink</a> ";
+    }
+    print F "</td>";
+    print F "<td>";
+    for my $PP ( sort(keys(%secpkgs)) ) {
+        print F "<a href='#$PP'>$PP</a> ";
+    }
+    print F "</td>";
+    print F "</tr>\n";
+}
+if ( $owntot ) {
+    print F "<tr><td><b>Indexdata</b><br/>" . scalar(keys(%ownhosts)) . 
+        "&nbsp;/&nbsp;" .  scalar(keys(%ownpkgs)) . "&nbsp;/&nbsp;$owntot </td>\n" ;
+    print F "<td>";
+    for my $HH ( sort(keys(%ownhosts)) ) {
+        my $upd = $updlinks{$HH} || "#" ;
+        print F "<a href='#$HH'><b>$HH</b></a><a href='$upd'>$updlink</a> ";
+        #print F "<a href='#$HH'><b>$HH</b></a> ";
+    }
+    print F "</td>";
+    print F "<td>";
+    for my $PP ( sort(keys(%ownpkgs)) ) {
+        print F "<a href='#$PP'>$PP</a> ";
+    }
+    print F "</td>";
+    print F "</tr>\n";
+}
+if ( $mantot ) {
+    print F "<tr><td><b>Manual</b><br/>" . scalar(keys(%manhosts)) . 
+        "&nbsp;/&nbsp;" .  scalar(keys(%manpkgs)) . "&nbsp;/&nbsp;$mantot </td>\n" ;
+    print F "<td>";
+    for my $HH ( sort(keys(%manhosts)) ) {
+        my $upd = $updlinks{$HH} || "#" ;
+        print F "<a href='#$HH'><b>$HH</b></a><a href='$upd'>$updlink</a> ";
+        #print F "<a href='#$HH'><b>$HH</b></a> ";
+    }
+    print F "</td>";
+    print F "<td>";
+    for my $PP ( sort(keys(%manpkgs)) ) {
+        print F "<a href='#$PP'>$PP</a> ";
+    }
+    print F "</td>";
+    print F "</tr>\n";
+}
+if ( $normtot ) {
+    print F "<tr><td>Normal<br/>" . scalar(keys(%normhosts)) . 
+        "&nbsp;/&nbsp;" .  scalar(keys(%normpkgs)) . "&nbsp;/&nbsp;$normtot </td>\n" ;
+    print F "<td>";
+    for my $HH ( sort(keys(%normhosts)) ) {
+        my $upd = $updlinks{$HH} || "#" ;
+        print F "<a href='#$HH'><b>$HH</b></a><a href='$upd'>$updlink</a> ";
+        #print F "<a href='#$HH'><b>$HH</b></a> ";
+    }
+    print F "</td>";
+    print F "<td>";
+    for my $PP ( sort(keys(%normpkgs)) ) {
+        print F "<a href='#$PP'>$PP</a> ";
+    }
+    print F "</td>";
+    print F "</tr>\n";
+}
+if ( %skiphosts ) {
+    print F "<tr><td>Skipped " . scalar(keys(%skiphosts)) . "</td>\n";
+    print F "<td colspan='2'>";
+    for my $HH ( sort(keys(%skiphosts)) ) {
+        my $upd = $updlinks{$HH} ||
+                  $wikilink . ucfirst($HH) . "Updates" . $year;
+        print F "<a href='#$HH'><b>$HH</b></a><a href='$upd'>$updlink</a> ";
+        #print F "<a href='#$HH'><b>$HH</b></a> ";
+    }
+    print F "</td></tr>\n";
+}
+if ( 1 ) {
+    print F "<tr><td>Ok <br/>" . scalar(keys(%okhosts)) .
+           " of " . scalar(keys(%allhosts)) . "</td>\n";
+    print F "<td colspan='2'>";
+    for my $HH ( sort(keys(%okhosts)) ) {
+        my $upd = $updlinks{$HH} || "#" ;
+        print F "<a href='#$HH'><b>$HH</b></a><a href='$upd'>$updlink</a> ";
+        #print F "<a href='#$HH'><b>$HH</b></a> ";
+    }
+    if ( !%okhosts ) {
+        print F "<b>None at all!</b>";
+    }
+    print F "</td></tr>\n";
 }
+print F "</table>\n";
 
+print F "<p/><b>" .  ( $sectot + $owntot + $mantot + $normtot ) . 
+        "</b> packages pending (<b>$sectot</b> critical) \n";
+
+# Graph 
+#my $secs = 60*60*24 * 7 * 2; # 2 weeks in secods
+#my $secs = "1m"; # one month, let nagios do the math
+my $secs = "45d"; 
+print F "<p/>" .
+        "<a href='http://nagios.indexdata.com/cgi-bin/nagios3/graphs.cgi?" .
+        "host=nagios&service=Apt%20Summary'>\n".
+        "<img src='http://nagios.indexdata.com/" .
+              "cgi-bin/nagios3/rrd2-system.cgi?" .
+              "host=nagios&service=Apt%20Summary&" .
+              "start=-$secs&" .
+              "width=800&height=100&type=AVERAGE' /> ".
+        "</a>" .
+        "<br/>\n";
+
+# The host table
 print F $table;
 
+# Package table
+print F "<p/><b><u>Packages</u></b>\n";
+print F "<table>\n";
+for my $P ( sort(keys(%summary)) ) {
+    my $PN = $P;
+    $PN = "<b>$P&nbsp;(s)</b>" if ($secpkgs{$P});
+    $PN = "<i>$P&nbsp;(id)</i>" if ($ownpkgs{$P});
+    $PN = "$P&nbsp;<b>(M)</b>" if ($manpkgs{$P});
+    print F "<tr><td><a name='$P'/>$PN</td>\n";
+    print F "<td>";
+    for my $HH ( split(' ',$summary{$P} )) {
+        print F "<a href=#$HH>$HH</a> ";
+    }
+    print F "</td>\n";
+
+}
+print F "</table>\n";
+
 print F "<p/>Produced " . `date`.
         " on " . `hostname` . " by " . `whoami` .
         "<br/>\n";
@@ -120,19 +494,24 @@ close(F)
 
 system "scp -q $outfile nagios:/var/www/heikki/index.html";
 
+exit(0);
+
 # Helper to take two strings and highligt that part of the second
 # that is different from the first. 
 sub strdiff {
     my $x = shift;
     my $y = shift;
-    print "strdiff: '$x' '$y' \n" if $debug>1;
+    print "strdiff: '$x' '$y' \n" if $debug>2;
+    if ( $x eq $y ) {
+        return "$x <b>??</b>";
+    }
     my $a = 0;
     while ( $a < length($y) &&
         substr($x,$a,1) eq substr($y,$a,1) ) {
         $a++;
     }
     if ( $a == length($y) ) {
-        return "$y ???";
+        return "$y";
     }
     my $b = 1;
     while ( $b < length($y)-$a &&
@@ -140,14 +519,14 @@ sub strdiff {
         $b++;
     }
     my $c = length($y) - $b +1;
-    print "strdiff:   a=$a " . substr($y,0,$a) ."\n" if $debug>1;
-    print "strdiff:   b=$b " . "\n" if $debug>1;
-    print "strdiff:   c=$c " . substr($y,$c) ."\n" if $debug>1;
-    print "strdiff:        " . substr($y,$a, $c-$a) ."\n" if $debug>1;
+    print "strdiff:   a=$a " . substr($y,0,$a) ."\n" if $debug>2;
+    print "strdiff:   b=$b " . "\n" if $debug>2;
+    print "strdiff:   c=$c " . substr($y,$c) ."\n" if $debug>2;
+    print "strdiff:        " . substr($y,$a, $c-$a) ."\n" if $debug>2;
     my $z =  substr($y,0,$a) .
              "<b>" . substr($y,$a, $c-$a) . "</b>" .
              substr($y,$c);
-    print "strdiff:        " . $z ."\n" if $debug>1;
-    print "\n" if $debug>1;
+    print "strdiff:        " . $z ."\n" if $debug>2;
+    print "\n" if $debug>2;
     return $z;
 }