--- loncom/interface/printout.pl	2006/12/18 11:34:55	1.117
+++ loncom/interface/printout.pl	2009/11/17 01:21:08	1.137.2.1
@@ -1,6 +1,7 @@
 #!/usr/bin/perl
 # CGI-script to run LaTeX, dvips, ps2ps, ps2pdf etc.
 #
+# $Id: printout.pl,v 1.137.2.1 2009/11/17 01:21:08 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -38,9 +39,16 @@ use Apache::loncommon();
 use Apache::lonlocal;
 use Apache::lonmsg();
 use LONCAPA::Enrollment;
+use LONCAPA::Configuration;
 
 use strict;
 
+my $busy_wait_timeout = 30; 
+
+sub debug {
+    my ($text) = @_;
+    print "$text <br />\n";
+}
 
 #   Determine if a user is operating as a student for this course/domain.
 #Parameters:
@@ -127,8 +135,8 @@ sub send_error_mail {
 	    foreach my $line (@$texfile) {
 		$message .= "$line\n";
 	    }
-	    my (undef, %receivers) = &Apache::lonfeedback::decide_receiver(undef, 0,
-									  1,1,1);
+	    my (undef, %receivers) = &Apache::lonmsg::decide_receiver(undef, 0,
+								      1,1,1);
 	    # print "<br /> sending...section:  $env{'request.course.sec'}";
 	    foreach my $dest (keys %receivers) {
 		# print "<br /> dest is $dest";
@@ -158,171 +166,132 @@ Your cookie information is incorrect.
 </body>
 </html>
 END
-    return;
+    exit;
 }
- &Apache::lonlocal::get_language_handle();
- &Apache::loncommon::content_type(undef,'text/html');
 
-  print(&Apache::loncommon::start_page('Creating PDF'));
+my %perlvar=%{&LONCAPA::Configuration::read_conf('loncapa.conf')};
+&Apache::lonlocal::get_language_handle();
+&Apache::loncommon::content_type(undef,'text/html');
+$env{'request.noversionuri'} = '/cgi-bin/printout.pl';
+print(&Apache::loncommon::start_page('Creating PDF'));
+
+my $identifier = $ENV{'QUERY_STRING'};
+my $texfile = $env{'cgi.'.$identifier.'.file'};
+my $laystyle = $env{'cgi.'.$identifier.'.layout'};
+my $numberofcolumns = $env{'cgi.'.$identifier.'.numcol'};
+my $paper = $env{'cgi.'.$identifier.'.paper'};
+my $selectionmade = $env{'cgi.'.$identifier.'.selection'};
+my $tableofcontents = $env{'cgi.'.$identifier.'.tableofcontents'};
+my $tableofindex = $env{'cgi.'.$identifier.'.tableofindex'};
+my $advanced_role = $env{'cgi.'.$identifier.'.role'};
+my $number_of_files = $env{'cgi.'.$identifier.'.numberoffiles'}+1;
+my $student_names = $env{'cgi.'.$identifier.'.studentnames'};
+my $backref = &Apache::lonnet::unescape($env{'cgi.'.$identifier.'.backref'});
+
+
+my @names_pack=();
+if ($student_names=~/_END_/) {  
+    @names_pack=split(/_ENDPERSON_/,$student_names);
+}
+if ($backref) {
+    print('<p>'.&mt("[_1]Return[_2] to editing resource.",
+		    "<a href=\"$backref\"><b>","</b></a>").'</p>');
+}
+my $figfile = $texfile;
+$figfile =~ s/^(.*_printout)_\d+_\d+_\d+\.tex/$1\.dat/;
+my $duefile = $texfile;
+$duefile =~ s/^(.*_printout)_\d+_\d+_\d+\.tex/$1\.due/;
 
-  my $identifier = $ENV{'QUERY_STRING'};
-  my $texfile = $env{'cgi.'.$identifier.'.file'};
-  my $laystyle = $env{'cgi.'.$identifier.'.layout'};
-  my $numberofcolumns = $env{'cgi.'.$identifier.'.numcol'};
-  my $paper = $env{'cgi.'.$identifier.'.paper'};
-  my $selectionmade = $env{'cgi.'.$identifier.'.selection'};
-  my $tableofcontents = $env{'cgi.'.$identifier.'.tableofcontents'};
-  my $tableofindex = $env{'cgi.'.$identifier.'.tableofindex'};
-  my $advanced_role = $env{'cgi.'.$identifier.'.role'};
-  my $number_of_files = $env{'cgi.'.$identifier.'.numberoffiles'}+1;
-  my $student_names = $env{'cgi.'.$identifier.'.studentnames'};
-  my $backref = &Apache::lonnet::unescape($env{'cgi.'.$identifier.'.backref'});
 
-  
-  my @names_pack=();
-  if ($student_names=~/_END_/) {  
-      @names_pack=split(/_ENDPERSON_/,$student_names);
-  }
+#-------------------------------------------------------------------------------------
+#
+#   Each print may have associated with it a file that contains a set of figures
+#   that need to be converted to .eps from whatever form they were in when included
+#   in the resource.  The name of the figure file is in $figfile.  If it exists,
+#   it contains the names of the files that need to be converted, one per line.
+#
 
-print "<a href=\"$backref\"><b>Return</b></a> to last resource.<br /><br />";
+if (-e $figfile) {
+    # print "$figfile exists\n";
+    my %done_conversion;
+    my $temporary_file=IO::File->new($figfile) || die "Couldn't open fig file $figfile for reading: $!\n";
+    my @content_of_file = <$temporary_file>;
+    close $temporary_file;  
+    my $noteps;
+    my %prog_state;
+    if ($advanced_role) { %prog_state=&Apache::lonhtmlcommon::Create_PrgWin('','Converting Images to EPS','Picture Conversion Status',$#content_of_file,'inline','80');  }
+    print('<br />');
+    foreach my $not_eps (@content_of_file) {
+	chomp($not_eps);
+	if ($not_eps ne '') {
+	    $not_eps=~s|\/\.\/|\/|g;
+	    if (!$done_conversion{$not_eps}) { #  Only convert multiple includes once.
+		&convert_figure($not_eps);
+		$done_conversion{$not_eps} = 1;
+	    }
+	}
+    }
+    if ($advanced_role) { 
+	&Apache::lonhtmlcommon::Close_PrgWin('',\%prog_state); 
+    }
+    unlink($figfile);
+}
+#     End of figure conversion section:
+#
+#--------------------------------------------------------------------------------------------
+#
+#  Figure out which Tex files we need to process.  If this is a large class e.g.
+#  the instructor may have asked that the printout be by section, one section per file
+#  in that case, the output tex fiels will be the base filename with 3 digit serial numbers
+#  just prior to the .tex file type.
+#  By the time this loop exits, @texfile is an array of the files to process.
+#
 
-  my $figfile = $texfile;
-  $figfile =~ s/^([^\.]+printout)[^t]+\.tex/$1\.dat/;
-  my $duefile = $texfile;
-  $duefile =~ s/^([^\.]+printout)[^t]+\.tex/$1\.due/;
-  #do we have figures?
-  # print "Figure file: $figfile\n";
-  if (-e $figfile) {
-      # print "$figfile exists\n";
-      my %done_conversion;
-      my $temporary_file=IO::File->new($figfile) || die "Couldn't open fig file $figfile for reading: $!\n";
-      my @content_of_file = <$temporary_file>;
-      close $temporary_file;  
-      my $noteps;
-      my %prog_state;
-      if ($advanced_role) { %prog_state=&Apache::lonhtmlcommon::Create_PrgWin('','Coverting Images to EPS','Picture Conversion Status',$#content_of_file,'inline','80');  }
-      print('<br />');
-      foreach my $not_eps (@content_of_file) {
-	  chomp($not_eps);
-	  if ($not_eps ne '') {
-	       # print "Converting $not_eps"; # Debugging.
-              my $status_statement='EPS picture for '.$not_eps;
-	      # print "$status_statement\n";
-	      $not_eps=~s|\/\.\/|\/|g;
-	      my $eps_f = $not_eps;
-	      # $eps_f =~ s/\.[^.]*$/\.eps/i;
-	      if ($eps_f=~/\/home\/([^\/]+)\/public_html\//) {
-                  $eps_f=~s/\/home\/([^\/]+)\/public_html/$1/;
-		  $eps_f = '/home/httpd/prtspool/'.$eps_f;
-	      } elsif ($eps_f=~/$Apache::lonnet::perlvar{'lonDocRoot'}\/res\//) {
-		  $eps_f=~m/$Apache::lonnet::perlvar{'lonDocRoot'}\/res\/(.+)/;
-		  $eps_f = '/home/httpd/prtspool/'.$1;
-	      } elsif ($eps_f=~/$Apache::lonnet::perlvar{'lonUsersDir'}\//) {
-		  $eps_f=~/$Apache::lonnet::perlvar{'lonUsersDir'}\/([^\/]+)\/\w\/\w\/\w\/(.+)/;
-		  $eps_f = '/home/httpd/prtspool/'.$1.'/'.$2;
-	      }
-	      $eps_f  =~ s/ /\_/g; # Spaces are problematic for system commands and LaTeX.
-	      # 
-	      # If the file is already an .eps or .ps file,
-	      # We really just need to copy it from where it was to prtspool
-	      # but with the spaces substituted to _'s.
-	      #
-	      my ($nsname,$path, $sext) = &fileparse($eps_f, qr/\.(ps|eps)/i);
-	      if ($sext =~/ps$/i) {
-		  # print "$not_eps is a postscript file. copy to $path\n";
-		  &File::Path::mkpath($path,0,0777);
-		  #print("Made path: $path");
-		  #$not_eps =~ s/^\s+//;
-		  #$not_eps =~ s/\s+$//;
-		  #$not_eps =~ s/ /\__/g;
-		  #print("Copying $not_eps to $eps_f\n");
-		  copy("$not_eps", "$eps_f"); 
-		  # print "Copy complete\n";
-	      } else {
-	      
-		  $eps_f .= '.eps';	# Just append the eps ext.
-		  my $path=$eps_f;
-		  $path =~ s/\/([^\/]+)\.eps$//;
-		  # print "Final file path: $path "; # Debugging
-		  &File::Path::mkpath($path,0,0777);
-		  $not_eps =~ s/^\s+//;
-		  $not_eps =~ s/\s+$//;
-		  $not_eps =~ s/ /\\ /g;
-		  if ( exists($done_conversion{$not_eps})) { next; }
-		  if ($advanced_role) {
-		      my $prettyname=$not_eps;
-		      $prettyname=~s|/home/([^/]+)/public_html|/priv/$1|;
-		      $prettyname=~s|$Apache::lonnet::perlvar{'lonDocRoot'}/|/|;
-		      &Apache::lonhtmlcommon::Update_PrgWin('',\%prog_state,
-							    'Converting to EPS '.$prettyname);
-		  }
-		  $done_conversion{$not_eps}=1;
-		  # print "Converting $not_eps -> $eps_f"; # Debugging
-		  system("convert $not_eps $eps_f");
-		  # check is eps exist in prtspool
-		  if (not -e $eps_f) {
-		      # converting an animated gif creates either:
-		      # anim.gif.eps.0
-		      # or
-		      # anim.gif-0.eps
-		      for (my $i=0;$i<10000;$i++) {
-			  if (-e $eps_f.'.'.$i) {
-			      rename($eps_f.'.'.$i, $eps_f);
-			      last;
-			  }
-			  my $anim_eps = $eps_f;
-			  $anim_eps =~ s/(\.[^.]*)\.eps$/$1-$i\.eps/i;
-			  if (-e $anim_eps) {
-			      rename($anim_eps, $eps_f);
-			      last;
-			  }
-		      }
-		  }
-		  
-		  # imagemagick 6.2.0-6.2.7 fails to properly handle
-		  # convert anim.gif anim.gif.eps
-		  # it creates anim.eps instead. 
-		  if (not -e $eps_f) {
-		      my $eps_f2 = $eps_f;
-		      $eps_f2 =~ s/\.[^.]*\.eps$/\.eps/i;
-		      if(-e $eps_f2) {
-			  rename($eps_f2,$eps_f);
-		      }
-		  }
-	      }
+my @texfile=($texfile);
+if ($number_of_files>1) {
+    @texfile=();
+    for (my $i=1;$i<=$number_of_files;$i++) {
+	my $new_texfile=$texfile;
+	$new_texfile=~s/\.tex//;
+	$new_texfile = sprintf("%s_%03d.tex", $new_texfile,$i);
+	push @texfile,$new_texfile;
+    } 
+}
 
-	  }
-      }
-      if ($advanced_role) { 
-	  &Apache::lonhtmlcommon::Close_PrgWin('',\%prog_state); 
-      }
-      unlink($figfile);
-  }
-  #print "$texfile\n"; #name of the tex file for debugging only   
-  my @texfile=($texfile);
-  if ($number_of_files>1) {
-      @texfile=();
-      for (my $i=1;$i<=$number_of_files;$i++) {
-	  my $new_texfile=$texfile;
-	  $new_texfile=~s/\.tex//;
-	  $new_texfile = sprintf("%s_%03d.tex", $new_texfile,$i);
-	  push @texfile,$new_texfile;
-      } 
-  }
+#--------------------------------------------------------------------------------------------
 
 my $ind=-1;
+
 my %prog_state;
-if ($advanced_role) { %prog_state=&Apache::lonhtmlcommon::Create_PrgWin('','Print Status','Class Print Status',$number_of_files,'inline','80'); }
+if ($advanced_role) { 
+    %prog_state=&Apache::lonhtmlcommon::Create_PrgWin('','Print Status',&mt('Class Print Status'),$number_of_files,'inline','80'); 
+}
 print "<br />";
-my $num_files = @texfile;
+my $num_files = @texfile;	# How does this differ from $number_of_files , can that be 0?
+
+
+
+
 foreach $texfile (@texfile) {
   my $status_statement='';
   my $link_text='download PDF';
   $ind++;
+
+  #---------------------------------------------------------------------------------------
+  #  This chunk of code 
+  #  determines the status message for the printout, and the download link text.
+  #  If the print is for one or more students, both will contain the range of students
+  #  covered by this file.
+  #  
+
   my @stud_info=split(/_END_/,$names_pack[$ind]);
-  my @tempo_array=split(/:/,$stud_info[0]);
+  my @tempo_array=split(/:/,$stud_info[0]);       # username:domain:section:full name:...
   my $name;
   my $name_range='';
+
+  # $name       -> Either user's full name or username@domain
+  # $name_range -> Either user's last name or usrname.
+
   if ($tempo_array[3]) {
       $name=$tempo_array[3];
       ($name_range) = split(/,/,$name, 2);
@@ -330,10 +299,20 @@ foreach $texfile (@texfile) {
       $name=$tempo_array[0].'@'.$tempo_array[1];
       $name_range = $tempo_array[0];
   }
+
+  # If there truly is a name add it to the status text so we know which
+  # user is getting printed.
+  #
+
   if (($name ne "") && ($name ne '@') ) { # Could be printing codes...
       $link_text='<b>'.$name.'</b>';
       $status_statement.=$name;
   }
+
+  # Group of students being printed...
+  # $name_range -> first student's name - last student's name
+  #
+
   if ($#stud_info>0) {
       @tempo_array=split(/:/,$stud_info[-1]);
       if ($tempo_array[3]) {
@@ -350,284 +329,73 @@ foreach $texfile (@texfile) {
   
       }
   }
-  if(($num_files > 1) && ($link_text eq 'download PDF')) { # Printing codes
+
+  # $name_range is the range of names in this file.
+  # $name is the first of the names in this file.
+  #
+  #-----------------------------------------------------------------------
+
+  #  If the number of files is > 1, but we don't have multiple
+  #  student names, we must be printing an exam from codes.
+  #  The download link becomes the filename (basename.tex
+  #  The status info has the basename appended to it.
+  #
+  if(($num_files > 1) && ($link_text eq 'download PDF')) {
       $link_text = '<b>'.basename($texfile,'.tex').'.pdf</b>';
       $status_statement .= basename($texfile);
   }
+
+
+  #------------------------------------------------------------------------
+
   $name_range =~ s/'//g;	# O'Neil -> ONeil e.g.
+
+
   print "<br/>";
-  if ($advanced_role) { &Apache::lonhtmlcommon::Update_PrgWin('',\%prog_state,'Creating PDF for '.$status_statement); }
-  #  This little piece of dirt puts username ranges into the original tex
-  #  Tex filename from which they'll propagate into the other filenames as well.
-  #
-  if (-e $texfile) {
+  if ($advanced_role) { 
+      &Apache::lonhtmlcommon::Update_PrgWin('',\%prog_state,'Creating PDF for '.$status_statement); 
+  }
+
+  if (-e $texfile) {		# Ensure the tex file exists:
+
+      #---------------------------------------------------------------------
+      #
+      #  Put username ranges into the original tex
+      #  Tex filename from which they'll propagate into the other filenames as well.
+      #
+
       if (($name_range ne '') && ($num_files > 1)) {
 	  my $newtexfile = $texfile;
 	  $newtexfile    =~ s/\.tex/$name_range\.tex/;
 	  rename($texfile, $newtexfile);
 	  $texfile       = $newtexfile;
       }
+
+      #---------------------------------------------------------------------
+
       $texfile =~ m/^(.*)\/([^\/]+)$/; 
       my $name_file = $2;
       my $path_file = $1.'/';
       chdir $path_file;
-      my $dvi_file= $name_file; $dvi_file =~ s/\.tex/$name_range\.dvi/;
-      &busy_wait_command("latex $name_file 1>/dev/null 2>/dev/null",
-			 "for $status_statement now LaTeXing file",
-			 \%prog_state,$dvi_file);
-      if ($tableofcontents eq 'yes') {
-      &busy_wait_command("latex $name_file 1>/dev/null 2>/dev/null",
-			 "for $status_statement First LaTeX of file for table of contents",
-			 \%prog_state,$dvi_file);
-      &busy_wait_command("latex $name_file 1>/dev/null 2>/dev/null",
-			 "for $status_statement Second LaTeX of file for table of contents",
-			 \%prog_state,$dvi_file);
-      } #to create table of contents
-      my $idxname=$name_file;
-      $idxname=~s/\.tex$/\.idx/;
-      if ($tableofindex eq 'yes') {
-	  &busy_wait_command("makeindex $idxname",
-			     "making index file",
-			     \%prog_state,$idxname);
-	  &busy_wait_command("latex $name_file 1>/dev/null 2>/dev/null",
-			     "for $status_statement now LaTeXing file for index section",
-			     \%prog_state,$dvi_file);
-      } #to create index
-      #Do we have a latex error in the log file?
-      my $logfilename = $texfile; $logfilename =~ s/\.tex$/\.log/;
-      my $temporary_file=IO::File->new($logfilename) || die "Couldn't open log file $logfilename for reading: $!\n";
-      my @content_of_file = <$temporary_file>;
-      close $temporary_file; 
-      my $body_log_file = join(' ',@content_of_file);
-      $logfilename =~ s/\.log$/\.html/;
-      $temporary_file = IO::File->new('>'.$logfilename); 
-      print $temporary_file '<html><head><title>LOGFILE</title></head><body><pre>'.$body_log_file.'</pre></body></html>'."\n";
-      if ($body_log_file=~m/!\s+Emergency stop/) {
-	  my $whereitbegins = rindex $body_log_file,'STAMPOFPASSEDRESOURCESTART';
-	  my $whereitends = rindex $body_log_file,'STAMPOFPASSEDRESOURCEEND';
-	  my $badresource;
-	  my $badtext;
-	  if ($whereitbegins!=-1 and $whereitends!=-1) {
-	      $badtext = substr($body_log_file,$whereitbegins+26, $whereitends-$whereitbegins-26);
-	      $whereitbegins  = rindex $badtext,'located in';
-	      if ($whereitbegins != -1) {
-		  
-		  $badresource = substr($badtext, $whereitbegins+27, 
-					length($badtext) - $whereitbegins - 48);
-		  # print "<br />failing resourcename: $badresource<br />";
-	      }
-	  }
-	  
-          if ($advanced_role) {  
-	      #LaTeX failed to parse tex file 
-	      print "<h2>LaTeX could not successfully parse your tex file.</h2>";
-	      print "It probably has errors in it.<br />";
-	      print "With very high probability this error occured in ".$badtext."<br /><br />";
-	      print "Here are the error messages in the LaTeX log file<br /><pre>";
-
-	      my $sygnal = 0;
-	      for (my $i=0;$i<=$#content_of_file;$i++) {
-		  if ($content_of_file[$i]=~m/^Runaway argument?/ or $content_of_file[$i]=~m/^!/) {
-		      $sygnal = 1;
-		  } 
-		  if ($content_of_file[$i]=~m/Here is how much of/) {
-		      $sygnal = 0;
-		  } 
-		  if ($sygnal) {
-		      print "$content_of_file[$i]";
-		  }  
-	      }
-	      print "</pre>\n";
-	      # print "<br /> Advanced role <br />";
-              print "<b><big>The link to ";
-              $logfilename=~s/\/home\/httpd//;
-	      print "<a href=\"$logfilename\">Your log file </a></big></b>";
-	      print "\n";
-              #link tooriginal LaTeX file (included according Michael Hamlin desire)
-	      my $tex_temporary_file=IO::File->new($texfile) || die "Couldn't open tex file $texfile for reading: $!\n";
-	      my @tex_content_of_file = <$tex_temporary_file>;
-	      close $tex_temporary_file; 
-	      my $body_tex_file = join(' ',@tex_content_of_file);
-	      $texfile =~ s/\.tex$/aaaaa\.html/;
-	      $tex_temporary_file = IO::File->new('>'.$texfile); 
-	      print $tex_temporary_file '<html><head><title>LOGFILE</title></head><body><pre>'.$body_tex_file.'</pre></body></html>'."\n";
-	      print "<br /><br />";
-	      print "<b><big>The link to ";
-	      $texfile=~s/\/home\/httpd//;
-	      print "<a href=\"$texfile\">Your original LaTeX file </a></big></b>";
-	      print "\n";
-	      my $help_text = &Apache::loncommon::help_open_topic("Print_Resource", "Help on printing");
-	      print ("$help_text");
+      my $dvi_file= $name_file; $dvi_file =~ s/\.tex$/\.dvi/;
+      &make_dvi_file($name_file,
+		     $dvi_file,
+		     $tableofcontents,
+		     $tableofindex,
+		     $status_statement,
+		     \%prog_state,
+		     $busy_wait_timeout);
 
-	  } else {		# Student role...
-	      #  at this point:
-	      #    $body_log_file - contains the log file.
-              #    $name_file     - is the name of the LaTeX file.
-              #    $identifier    - is the unique LaTeX identifier.l
-
-	      print "<br />There are errors in $badtext";
-	      print "<br />These errors prevent this resource from printing correctly";
-	      my $tex_handle = IO::File->new($name_file);
-	      my @tex_contents = <$tex_handle>;
-	      &send_error_mail($identifier, $badresource, $body_log_file, \@tex_contents);
-	      print "<br />A message has been sent to the instructor describing this failure<br />";
-	      my $help_text = &Apache::loncommon::help_open_topic("Print_Resource", "Help on printing");
-	      print  ("$help_text");
 
-	  }
+      #Do we have a latex error in the log file?
 
-      } elsif ($body_log_file=~m/<inserted text>/) {
-	  my $whereitbegins = index $body_log_file,'<inserted text>';
-	  print "You are running LaTeX in <b>batch mode</b>.";
-	  while ($whereitbegins != -1) {
-	      my $tempobegin=$whereitbegins;
-	      $whereitbegins = rindex $body_log_file,'STAMPOFPASSEDRESOURCESTART',$whereitbegins;
-	      my $whereitends = index $body_log_file,'STAMPOFPASSEDRESOURCEEND',$whereitbegins;
-	      print "<br />It has found an error in".substr($body_log_file,$whereitbegins+26,$whereitends-$whereitbegins-26)." <br /> and corrected it.\n";
-	      print "Usually this correction is valid but you probably need to check the indicated resource one more time and implement neccessary corrections by yourself.\n";
-	      $whereitbegins = index $body_log_file,'<inserted text>',$tempobegin+10;
-	  }
-	  $name_file =~ s/\.tex/\.dvi/;
-	  my $new_name_file = $name_file;
-	  $new_name_file =~ s/\.dvi/\.ps/;
-	  my $papera=$paper;
-	  if ($papera eq 'letter') {$papera='';}
-	  if ($papera ne '') {$papera='-t'.$papera;}
-	  my $comma = "dvips $papera -Ppdf -G0 -o $new_name_file";
-	  &busy_wait_command("$comma $name_file 1>/dev/null 2>/dev/null",
-			     "for $status_statement now Converting to PS",
-			     \%prog_state,$new_name_file);
-	  if (-e $new_name_file) {
-	      my $latex_file = $name_file;
-	      $latex_file    =~ s/\.dvi/\.tex/;
-	      &repaginate($new_name_file, $latex_file, $numberofcolumns);
-	      #
-	      #  Now have to re-latex, re dvips again to 
-	      #  get the repaginated postscript.
-	      #
-	      &busy_wait_command("latex $latex_file 1>/dev/null 2>/dev/null",
-				 "for $status_statement first latex to repaginate",
-				 \%prog_state, $name_file);
-	      if ($tableofcontents eq 'yes') {
-		  &busy_wait_command("latex $latex_file 1>/dev/null 2>/dev/null",
-				     "for $status_statement second latex to repaginate",
-				     \%prog_state, $name_file);
-		  &busy_wait_command("latex $latex_file 1>/dev/null 2>/dev/null",
-				     "for $status_statement third latex to repaginate",
-				     \%prog_state, $name_file);
-	      }
-	      if ($tableofindex eq 'yes') {
-		  my $idxname = $latex_file;
-		  $idxname =~ s/\.tex$/\.idx/;
-		  &busy_wait_command("makindex $idxname",
-				     "Re-creating index file",
-				     \%prog_state, $idxname);
-		  &busy_wait_command("latex $latex_file 1>/dev/null 2>/dev/null",
-				     "for $status_statement now Recreting index (latex)",
-				     \%prog_state, $dvi_file);
 
-	      }
-	      &busy_wait_command("$comma $name_file 1>dev/null 2>/dev/null",
-				 "for $status_statement dvips to repaginate",
-				 \%prog_state, $new_name_file);
-	      #
-	      #  One last little hinky kinky thing.
-	      #  It's just possible that some fonts could not be maded
-	      #  at the resolution of the pdf print driver.
-	      #  In that case a file called missfont.log will have been
-	      #  created that will contain the commands that were attempted
-	      # to create the missing fonts.  If we basically
-	      # take all the 8000 strings in that file, and
-	      # replace them with 600 (the ljfour resolution)
-	      # run the commands in that file and redvips,
-	      # we'll be able to print the missing glyphs at 600dpi.
-	      #
-	      # Supposedly it is possible to tune TeX/Metafont to do this
-	      # right but I failed to get that to work when following the
-	      # docs at the tug site, hence this rather kludgey fix.
-	      #
-	      #  We make the (I think) reasonable assumption that
-	      #  missing glyphs won't change the pagination and I think
-	      #  this is true because TeX/dvips will leave a space
-	      #  instead of these glyphs based on the font metrics
-	      #  (fancy way to say there will be a blank the size of the missing
-	      #  glyphs).
-	      #
-	      my $print_directory = dirname($name_file);
-	      my $missfonts_file  = $print_directory."/missfont.log";
-	      #print("<br /> Missing fonts file is: $missfonts_file");
-	      if (-e $missfonts_file) {
-		  #print("<br />Missing fonts file exists\n");
-		  &create_missing_fonts($missfonts_file);
-		  unlink($missfonts_file, \%prog_state);
-		  &busy_wait_command("$comma $name_file 1>dev/null 2>/dev/null",
-				     "for $status_statement dvips generated missing fonts",
-				     \%prog_state, $new_name_file);
-	      }
+      my $logfilename = $texfile; $logfilename =~ s/\.tex$/\.log/;
 
-	      #
-	      print "\n<h1>PDF output file (see link below)</h1>\n";
-	      $new_name_file =~ m/^(.*)\./;
-	      my $ps_file = my $tempo_file = $1.'temporar.ps';
-	      my $pdf_file = $1.'.pdf';
-	      if ($laystyle eq 'album' and $numberofcolumns eq '2') {
-		  my $papera=$paper;
-                  if ($papera eq 'letter') {$papera='';}
-		  if ($papera ne '') {$papera='-p'.$papera;}
-		  $comma = "psnup $papera -2 -s1.0 $new_name_file";
-		  &busy_wait_command("$comma $tempo_file 1>/dev/null 2>/dev/null",
-				     "for $status_statement now Modifying PS layout",
-				     \%prog_state,$tempo_file); 
-	      } elsif ($laystyle eq 'book' and $numberofcolumns eq '2') {
-		  my $papera=$paper;
-                  if ($papera eq 'letter') {$papera='';}
-		  if ($papera ne '') {$papera='-p'.$papera;}
-		  $comma = 'pstops '.$papera.' "2:0+1(0.48w,0)"';
-		  &busy_wait_command("$comma $new_name_file $tempo_file 1>/dev/null 2>/dev/null",
-				     "for $status_statement now Modifying PS layout",
-				     \%prog_state,$tempo_file); 
 
-	      } else {
-		  $ps_file=$new_name_file;
-	      }	    
-	      &busy_wait_command("ps2pdf $ps_file $pdf_file 1>/dev/null 2>/dev/null",
-				 "for $status_statement now Converting PS to PDF",
-				 \%prog_state, $pdf_file);
+      if (&analyze_logfile($logfilename, $texfile, $advanced_role)) {
+	  
 
-	      my $texlog = $texfile;
-	      my $texaux = $texfile;
-	      my $texdvi = $texfile;
-	      my $texps = $texfile;
-	      $texlog =~ s/\.tex/\.log/;
-	      $texaux =~ s/\.tex/\.aux/;
-	      $texdvi =~ s/\.tex/\.dvi/;
-	      $texps =~ s/\.tex/\.ps/;
-	      my @garb = ($texaux,$texdvi,$texps);
-#	  unlink @garb;
-	      unlink $duefile;
-	      print "<a href=\"/prtspool/$pdf_file\">Your PDF document</a>";
-	  }
-	  if ($advanced_role) {  
-	      print "<br /><br />";
-	      print "<b><big>The link to ";
-	      $logfilename=~s/\/home\/httpd//;
-	      print "<a href=\"$logfilename\">Your log file </a></big></b>";
-	      print "\n";
-	      #link tooriginal LaTeX file (included according Michael Hamlin desire)
-	      my $tex_temporary_file=IO::File->new($texfile) || die "Couldn't open tex file $texfile for reading: $!\n";
-	      my @tex_content_of_file = <$tex_temporary_file>;
-	      close $tex_temporary_file; 
-	      my $body_tex_file = join(' ',@tex_content_of_file);
-	      $texfile =~ s/\.tex$/aaaaa\.html/;
-	      $tex_temporary_file = IO::File->new('>'.$texfile); 
-	      print $tex_temporary_file '<html><head><title>LOGFILE</title></head><body><pre>'.$body_tex_file.'</pre></body></html>'."\n";
-	      print "<br /><br />";
-	      print "<b><big>The link to ";
-	      $texfile=~s/\/home\/httpd//;
-	      print "<a href=\"$texfile\">Your original LaTeX file </a></big></b>";
-	      print "\n";
-	  }
-      } else {
 	  #LaTeX successfully parsed tex file 
 	  $name_file =~ s/\.tex/\.dvi/;
 	  my $new_name_file = $name_file;
@@ -655,21 +423,14 @@ foreach $texfile (@texfile) {
 	  # right but I failed to get that to work when following the
 	  # docs at the tug site, hence this rather kludgey fix.
 	  #
-	  #  We make the (I think) reasonable assumption that
-	  #  missing glyphs won't change the pagination and I think
-	  #  this is true because TeX/dvips will leave a space
-	  #  instead of these glyphs based on the font metrics
-	  #  (fancy way to say there will be a blank the size of the missing
-	  #  glyphs).
-	  #
+
 	  my $print_directory = dirname($name_file);
 	  my $missfonts_file  = $print_directory."/missfont.log";
 	  #print("<br /> Missing fonts file is: $missfonts_file");
 	  if (-e $missfonts_file) {
 	      #print("<br />Missing fonts file exists\n");
-	      &create_missing_fonts($missfonts_file);
-	      unlink($missfonts_file);
-	      &busy_wait_command("$comma $name_file 1>dev/null 2>/dev/null",
+	      &create_missing_fonts($missfonts_file,\%prog_state);
+	      &busy_wait_command("$comma $name_file 1>/dev/null 2>/dev/null",
 				 "for $status_statement dvips generated missing fonts",
 				 \%prog_state, $new_name_file);
 	  }
@@ -677,27 +438,16 @@ foreach $texfile (@texfile) {
 	      my $latex_file = $name_file;
 	      $latex_file =~ s/\.dvi/\.tex/;
 	      &repaginate($new_name_file, $latex_file,  $numberofcolumns);
-	      &busy_wait_command("latex $latex_file 1>/dev/null 2>/dev/null",
-				 "for $status_statement first latex to repaginate",
-				 \%prog_state, $name_file);
-	      if ($tableofcontents eq 'yes') {
-		  &busy_wait_command("latex $latex_file 1>/dev/null 2>/dev/null",
-				     "for $status_statement second latex to repaginate",
-				     \%prog_state, $name_file);
-		  &busy_wait_command("latex $latex_file 1>/dev/null 2>/dev/null",
-				     "for $status_statement third latex to repaginate",
-				     \%prog_state, $name_file);
-	      }
-	      if ($tableofindex eq 'yes') {
-		  my $idxname = $latex_file;
-		  $idxname    =~ s/\.tex$/\.idx/;
-		  &busy_wait_command("makeindex $idxname",
-				     "Re-creating index file",
-				     \%prog_state, $idxname);
-		  &busy_wait_command("latex $latex_file 1>/dev/null 2>/dev/null",
-				     "for $status_statement now Recreting index (latex)",
-				     \%prog_state, $dvi_file);
-	      }
+
+	      &make_dvi_file($latex_file,
+			     $name_file,
+			     $tableofcontents,
+			     $tableofindex,
+			     $status_statement,
+			     \%prog_state,
+			     $busy_wait_timeout);
+
+
 	      &busy_wait_command("$comma $name_file 1>/dev/null 2>/dev/null",
 				 "for $status_statement dvips to repaginate",
 				 \%prog_state, $new_name_file);
@@ -755,10 +505,12 @@ foreach $texfile (@texfile) {
 	      $texps =~ s/\.tex/\.ps/;
 	      my @garb = ($texlog,$texaux,$texdvi,$texps);
 #	  unlink @garb;
-	      unlink $duefile;
+	      unlink($duefile);
 	      print "<a href=\"/prtspool/$pdf_file\">$link_text - click here to download pdf</a>";
 	      print "\n";
 	  }
+	  unlink($missfonts_file);
+
       }  
   } else {
       print "LaTeX file $texfile was not created successfully";
@@ -776,7 +528,7 @@ if ($number_of_files>1) {
     print("<pre>Zip Output:\n");
     system($statement);
     print("</pre>");
-    $zipfile=~s/\/home\/httpd//;
+    $zipfile=~s{^\Q$perlvar{'lonPrtDir'}\E}{/prtspool};
     print "<br /> A <a href=\"$zipfile\">ZIP file</a> of all the PDFs.";
 }
 if ($advanced_role) { &Apache::lonhtmlcommon::Close_PrgWin('',\%prog_state); }
@@ -786,9 +538,17 @@ my $done;
 sub REAPER {
     $done=1;
 }
-
+#
+#  Execute a command updating the status window as the command's
+#  output file builds up (at intervals of a second).
+#
+#   If the timeout argument defined, then if that many seconds
+#   elapses without an increase in the size of the output file,
+#   the command will be killed (this deals with the case when
+#   latex crawls into an infinite loop).
+#
 sub busy_wait_command {
-    my ($command,$message,$progress_win,$output_file)=@_;
+    my ($command,$message,$progress_win,$output_file, $timeout)=@_;
     
     $SIG{CHLD} = \&REAPER;
     $done=0;
@@ -796,12 +556,30 @@ sub busy_wait_command {
     if ($advanced_role) {
 	&Apache::lonhtmlcommon::Update_PrgWin('',$progress_win,$message);
     }
+    my $last_size      = 0;
+    my $unchanged_time = 0;
     while(!$done) {
 	sleep 1;
 	my $extra_msg;
 	if ($output_file) {
 	    my $size=(stat($output_file))[7];
 	    $extra_msg=", $size bytes generated";
+	    if ($size == $last_size) {
+		$unchanged_time++;
+		if ($timeout && ($unchanged_time > $timeout)) {
+		    print "<h1>Operation timed out!</h1>\n";
+		    print "<p>Executing $command, the output file $output_file did not grow\n";
+		    print "after $timeout seconds.  This <em>may</em> indicate $command\n";
+		    print "is in an infinite loop.\n";
+		    print "See if printing fewer copies helps.  Please contact LON-CAPA\n";
+		    print "support about this in any event.";
+		    print "</p>";
+		    kill(9, $pid); # Reaper will do the rest...I hope there's errors in the log.
+		}
+	    } else {
+		$last_size      = $size;
+		$unchanged_time = 0;
+	    }
 	}
 	if ($advanced_role) {
 	    &Apache::lonhtmlcommon::Update_PrgWin('',$progress_win,
@@ -812,6 +590,66 @@ sub busy_wait_command {
     close(CMD);
 }
 
+# Make the dvi file (or rather try to), from the latex file and the
+# various bits and pieces that control how the latex file is processed:
+# LaTeX is run as many times a needed to make this all happen... this may
+# result in several runs of LaTeX that just are errors if the LaTeX is
+# bad, but the printing subsystem is _supposed_ to not do that.
+#
+# Parameters:
+#   name_file        - Name of the LaTeX file to process.
+#   dvi_file         - Name of resulting dvi file.
+#   tableofcontents  - "yes" if we are supposed to make a table of contents.
+#   tableofindex     - "yes" if we are suposed to make an index.
+#   status_statement - Part of the status statement for ths status window.
+#   prog_state       - Reference to the program state hash.
+#   busy_wait_timeout- Seconds without any progress that imply a problem.
+#
+#
+sub make_dvi_file {
+    my ($name_file,
+	$dvi_file,
+	$tableofcontents,
+	$tableofindex,
+	$status_statement,
+	$prog_state,
+	$busy_wait_timeout) = @_;
+    
+    
+    &busy_wait_command("latex $name_file 1>/dev/null 2>/dev/null",
+		       "for $status_statement now LaTeXing file",
+		       $prog_state,$dvi_file, $busy_wait_timeout);
+
+    # If the tableof contents was requested, we need to run 
+    # LaTex a couple more times to get all the references sorted out.
+
+    if ($tableofcontents eq 'yes') {
+	&busy_wait_command("latex $name_file 1>/dev/null 2>/dev/null",
+			   "for $status_statement First LaTeX of file for table of contents",
+			   $prog_state,$dvi_file, $busy_wait_timeout);
+	&busy_wait_command("latex $name_file 1>/dev/null 2>/dev/null",
+			   "for $status_statement Second LaTeX of file for table of contents",
+			   $prog_state,$dvi_file,$busy_wait_timeout);
+    } 
+
+    # And makeindex and another run of LaTeX to incorporate it if the index
+    # is enabled.
+
+
+    if ($tableofindex eq 'yes') {
+	my $idxname=$name_file;
+	$idxname=~s/\.tex$/\.idx/;
+	&busy_wait_command("makeindex $idxname",
+			   "making index file",
+			   $prog_state,$idxname);
+	&busy_wait_command("latex $name_file 1>/dev/null 2>/dev/null",
+			   "for $status_statement now LaTeXing file for index section",
+			   $prog_state,$dvi_file, $busy_wait_timeout);
+    } 
+    
+}    
+
+
 #  Repagninate
 #  What we need to do:
 #   - Count the number of pages in each student.
@@ -861,8 +699,8 @@ sub repaginate {
 	#  bottom of the page, m the page number within the document.
 	#
 
-	if ($line =~ /^%%Page:/) {
-	    my @pageinfo = split(/ /, $line);
+	if ($line =~ /^%%Page:\s+\d+\s+\d+/) {
+	    my @pageinfo = split(/\s+/, $line);
 	    if ($page_number < $pageinfo[1]) {
 		$page_number = $pageinfo[1];
 	    } elsif ($pageinfo[2] ne 1) {
@@ -962,16 +800,19 @@ sub create_missing_fonts {
     # Open and read in the font file..we'll read it into the array
     #  font_commands.
     #
-    my $font_handle = IO::File->new($fontfile);
+    open(my $font_handle, $fontfile);
     my @font_commands = <$font_handle>;
-    
+
+    # make the list contain each command only once
+    my %uniq;
+    @font_commands = map { $uniq{$_}++ == 0 ? $_ : () } @font_commands;
 
     #  Now process each command replacing the appropriate 8000's with
     #  600's ensuring that font names with 8000's in them are not corrupted.
     #  and if the --mfmode is not ljfour we turn it into ljfour.
     #   Then we execute the command.
     #
-
+    
     foreach my $command (@font_commands) {
 	#print("<br />Raw command: $command");
 	$command =~ s/ 8000/ 600/g;    # dpi directives.
@@ -988,10 +829,265 @@ sub create_missing_fonts {
 	$command = join(" ", (@cmdarray));
 
 	#print("<br />Creating fonts via command: $command");
-	&busy_wait_command("$command 1>dev/null 2>/dev/null",
+	&busy_wait_command("$command 1>/dev/null 2>/dev/null",
 			   "Creating missing font",
-			   $state, $command);
+			   $state);
 			   
     }
 
 }
+#
+#  Convert a figure file to encapsulated postscript:
+#  At present, this is using a lot of file scoped globals to pass data around. 
+# Parameters:
+#    not_eps  - The name of the file to convert which, presumably, is not
+#               already an eps file.
+#
+sub convert_figure {
+    my ($not_eps) = @_;
+
+    my $status_statement='EPS picture for '.$not_eps;
+    my $eps_f = $not_eps;
+
+    if ($eps_f=~/\/home\/([^\/]+)\/public_html\//) {
+	$eps_f=~s/\/home\/([^\/]+)\/public_html/$1/;
+    } elsif ($eps_f=~/$perlvar{'lonDocRoot'}\/res\//) {
+	$eps_f=~ s/$perlvar{'lonDocRoot'}\/res\/(.+)/$1/;
+    } elsif ($eps_f=~/$perlvar{'lonUsersDir'}\//) {
+	$eps_f=~ s/$perlvar{'lonUsersDir'}\/([^\/]+)\/\w\/\w\/\w\/(.+)/$1\/$2/;
+    }
+
+    $eps_f = $perlvar{'lonPrtDir'}.'/'.$eps_f;
+
+    # Spaces are problematic for system commands and LaTeX, replace with _
+
+    $eps_f  =~ s/ /\_/g; 
+
+    # 
+    # If the file is already an .eps or .ps file (eps_f still has the original
+    # file type),
+    # We really just need to copy it from where it was to prtspool
+    # but with the spaces substituted to _'s.
+    #
+    my ($nsname,$path, $sext) = &fileparse($eps_f, qr/\.(ps|eps)/i);
+    if ($sext =~/ps$/i) {
+	&File::Path::mkpath($path,0,0777);
+	copy("$not_eps", "$eps_f"); 
+    } else {
+	
+	$eps_f .= '.eps';	# Just append the eps ext.
+	my $path= &dirname($eps_f);
+	&File::Path::mkpath($path,0,0777);
+	$not_eps =~ s/^\s+//;
+	$not_eps =~ s/\s+$//;
+	$not_eps =~ s/ /\\ /g;
+	if ($advanced_role) {
+	    my $prettyname=$not_eps;
+	    $prettyname=~s|/home/([^/]+)/public_html|/priv/$1|;
+	    $prettyname=~s|$perlvar{'lonDocRoot'}/|/|;
+	    &Apache::lonhtmlcommon::Update_PrgWin('',\%prog_state,
+						  'Converting to EPS '.$prettyname);
+	}
+	system("convert $not_eps $eps_f");
+
+	if (not -e $eps_f) {
+	    # converting an animated gif creates either:
+	    # anim.gif.eps.0
+	    # or
+	    # anim.gif-0.eps
+	    for (my $i=0;$i<10000;$i++) {
+		if (-e $eps_f.'.'.$i) {
+		    rename($eps_f.'.'.$i, $eps_f);
+		    last;
+		}
+		my $anim_eps = $eps_f;
+		$anim_eps =~ s/(\.[^.]*)\.eps$/$1-$i\.eps/i;
+		if (-e $anim_eps) {
+		    rename($anim_eps, $eps_f);
+		    last;
+		}
+	    }
+	}
+	
+	# imagemagick 6.2.0-6.2.7 fails to properly handle
+	# convert anim.gif anim.gif.eps
+	# it creates anim.eps instead. 
+	if (not -e $eps_f) {
+	    my $eps_f2 = $eps_f;
+	    $eps_f2 =~ s/\.[^.]*\.eps$/\.eps/i;
+	    if(-e $eps_f2) {
+		rename($eps_f2,$eps_f);
+	    }
+	}
+    }
+    
+}
+#
+#   Analyze a LaTeX logfile producing appropriate  output on error and 
+#   returning a boolean to let the caller know if, in our opinion, it's
+#   worth continuing on to produce the PDF file.
+#
+# Parameters:
+#   logfilename   - Name of the logfile.
+#   texfile       - Name of the LaTeX file that was being processed.
+#   advanced_role - True if the user is privileged with respect to the printout
+#                   (e.g. is the course coordinator or some such thing).
+# Returns:
+#    1            - Caller is advised to continue to create the PDF.
+#    0            - Caller need not bother creating the PDF.
+# Side Effects:
+#   Messages are printed to describe any errors that have been encountered.
+# NOTE:
+#    The current policy is to assume that if LaTeX decided to insert some text
+#    it has salvaged the resource and the resource can be printed.. in that case
+#    a message is emitted from this sub.
+#
+sub analyze_logfile {
+    my ($logfilename, $texfile, $advanced_role) = @_;
+
+    my $temporary_file=IO::File->new($logfilename) || die "Couldn't open log file $logfilename for reading: $!\n";
+    my @content_of_file = <$temporary_file>;
+    close $temporary_file; 
+    my $body_log_file = join(' ',@content_of_file);
+    $logfilename =~ s/\.log$/\.html/;
+    $temporary_file = IO::File->new('>'.$logfilename); 
+    print $temporary_file '<html><head><title>LOGFILE</title></head><body><pre>'.$body_log_file.'</pre></body></html>'."\n";
+    if ($body_log_file=~m/!\s+Emergency stop/) {
+	my $whereitbegins = rindex $body_log_file,'STAMPOFPASSEDRESOURCESTART';
+	my $whereitends = rindex $body_log_file,'STAMPOFPASSEDRESOURCEEND';
+	my $badresource;
+	my $badtext;
+	if ($whereitbegins!=-1 and $whereitends!=-1) {
+	    $badtext = substr($body_log_file,$whereitbegins+26, $whereitends-$whereitbegins-26);
+	    $whereitbegins  = rindex $badtext,'located in';
+	    if ($whereitbegins != -1) {
+		
+		$badresource = substr($badtext, $whereitbegins+27, 
+				      length($badtext) - $whereitbegins - 48);
+		# print "<br />failing resourcename: $badresource<br />";
+	    }
+        }
+
+	# Guys with privileged roles get a more detailed error output:
+
+	if ($advanced_role) {  
+	    #LaTeX failed to parse tex file 
+	    print "<h2>".&mt('LaTeX could not successfully parse your tex file.')."</h2>";
+	    print &mt('It probably has errors in it.')."<br />";
+	    if ($badtext) {
+                print &mt('With very high probability this error occured in [_1].',$badtext)
+                     ."<br /><br />";
+            }
+	    print &mt('Here are the error messages in the LaTeX log file:')
+                 ."<br /><pre>";
+	    
+	    my $sygnal = 0;
+	    for (my $i=0;$i<=$#content_of_file;$i++) {
+		if ($content_of_file[$i]=~m/^Runaway argument?/ or $content_of_file[$i]=~m/^!/) {
+		    $sygnal = 1;
+		} 
+		if ($content_of_file[$i]=~m/Here is how much of/) {
+		    $sygnal = 0;
+		} 
+		if ($sygnal) {
+		    print "$content_of_file[$i]";
+		}  
+	    }
+	    print "</pre>\n";
+	    # print "<br /> Advanced role <br />";
+	    $logfilename=~s{^\Q$perlvar{'lonPrtDir'}\E}{/prtspool};
+	    print "<b><big>"
+                 .&mt('The link to [_1]Your log file[_2]','<a href="'.$logfilename.'">','</a>')
+	         ."</big></b>\n";
+	    #link to original LaTeX file
+	    my $tex_temporary_file=IO::File->new($texfile) || die "Couldn't open tex file $texfile for reading: $!\n";
+	    my @tex_content_of_file = <$tex_temporary_file>;
+	    close $tex_temporary_file; 
+	    my $body_tex_file = join(' ',@tex_content_of_file);
+	    $texfile =~ s/\.tex$/aaaaa\.html/;
+	    $tex_temporary_file = IO::File->new('>'.$texfile); 
+	    print $tex_temporary_file '<html><head><title>LOGFILE</title></head><body><pre>'.$body_tex_file.'</pre></body></html>'."\n";
+	    print "<br /><br />";
+	    $texfile=~s{^\Q$perlvar{'lonPrtDir'}\E}{/prtspool};
+	    print "<b><big>"
+                 .&mt('The link to [_1]Your original LaTeX file[_2]','<a href="'.$texfile.'">','</a>')
+	         ."</big></b><br /><br />\n";
+	    my $help_text = &Apache::loncommon::help_open_topic("Print_Resource", &mt('Help on printing'));
+	    print ("$help_text");
+
+	    # Students on the other hand get a minimal error message, since they won't
+	    # be able to correct the error message. A message is sent to the 
+	    # instructor:
+
+	} else {		# Student role...
+	    #  at this point:
+	    #    $body_log_file - contains the log file.
+	    #    $name_file     - is the name of the LaTeX file.
+	    #    $identifier    - is the unique LaTeX identifier.l
+	    
+            print "<br />";
+	    if ($badtext) {
+                print &mt('There are errors in [_1].',$badtext);
+            } else {
+                print &mt('There are errors.');
+            }
+	    print "<br />".&mt('These errors prevent this resource from printing correctly.');
+	    my $tex_handle = IO::File->new($texfile);
+	    my @tex_contents = <$tex_handle>;
+	    &send_error_mail($identifier, $badresource, $body_log_file, \@tex_contents);
+	    print "<p>"
+                 .&mt('A message has been sent to the instructor describing this failure.')
+                 ."</p>";
+	    my $help_text = &Apache::loncommon::help_open_topic("Print_Resource", &mt('Help on printing'));
+	    print  ("$help_text");
+	    
+	  }
+
+	# Either way, an emergency stop does not allow us to continue so:
+
+	return 0;
+	
+	# The branch of code below is taken if it appears that 
+	# there was no emergency stop but LaTeX had to correct the
+	# input file to run.
+	# In that case we need to provide error feedback, as the correction >may< not be
+	# sufficient, we can let the game continue as there's a dvi file to process.
+
+    } elsif ($body_log_file=~m/<inserted text>/) {
+	my $whereitbegins = index $body_log_file,'<inserted text>';
+	print &mt('You are running LaTeX in [_1]batch mode[_2].','<b>','</b>');
+	while ($whereitbegins != -1) {
+	    my $tempobegin=$whereitbegins;
+	    $whereitbegins = rindex $body_log_file,'STAMPOFPASSEDRESOURCESTART',$whereitbegins;
+	    my $whereitends = index $body_log_file,'STAMPOFPASSEDRESOURCEEND',$whereitbegins;
+	    print "<br />"
+                 .&mt('It has found an error in [_1][_2]and corrected it.',substr($body_log_file,$whereitbegins+26,$whereitends-$whereitbegins-26),"<br />")."\n";
+	    print &mt('Usually this correction is valid but you probably need to check the indicated resource one more time and implement neccessary corrections by yourself.')."\n";
+	    $whereitbegins = index $body_log_file,'<inserted text>',$tempobegin+10;
+	}
+
+	if ($advanced_role) {  
+	    print "<br /><br />";
+	    $logfilename=~s{^\Q$perlvar{'lonPrtDir'}\E}{/prtspool};
+	    print "<b><big>"
+                 .&mt('The link to [_1]Your log file[_2]'
+                     ,'<a href="'.$logfilename.'">','</a>')
+	         ."</big></b>\n";
+	    #link to original LaTeX file
+	    my $tex_temporary_file=IO::File->new($texfile) || die "Couldn't open tex file $texfile for reading: $!\n";
+	    my @tex_content_of_file = <$tex_temporary_file>;
+	    close $tex_temporary_file; 
+	    my $body_tex_file = join(' ',@tex_content_of_file);
+	    $texfile =~ s/\.tex$/aaaaa\.html/;
+	    $tex_temporary_file = IO::File->new('>'.$texfile); 
+	    print $tex_temporary_file '<html><head><title>LOGFILE</title></head><body><pre>'.$body_tex_file.'</pre></body></html>'."\n";
+	    print "<br /><br />";
+	    $texfile=~s{^\Q$perlvar{'lonPrtDir'}\E}{/prtspool};
+	    print "<b><big>"
+                  .&mt('The link to [_1]Your original LaTeX file[_2]','<a href="'.$texfile.'">','</a>');
+	    print "</big></b>\n";
+	}
+	return 1;
+    }
+    return 1;			# NO log file issues at all.
+}