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Diff for /loncom/loncron between versions 1.45 and 1.90

version 1.45, 2004/01/09 17:43:40 version 1.90, 2011/06/03 20:45:10
Line 1 Line 1
 #!/usr/bin/perl  #!/usr/bin/perl
   
 # The LearningOnline Network  # Housekeeping program, started by cron, loncontrol and loncron.pl
 # Housekeeping program, started by cron  
 #  #
 # (TCP networking package  # $Id$
 # 6/1/99,6/2,6/10,6/11,6/12,6/14,6/26,6/28,6/29,6/30,  #
 # 7/1,7/2,7/9,7/10,7/12 Gerd Kortemeyer)  # Copyright Michigan State University Board of Trustees
   #
   # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
   #
   # LON-CAPA is free software; you can redistribute it and/or modify
   # it under the terms of the GNU General Public License as published by
   # the Free Software Foundation; either version 2 of the License, or
   # (at your option) any later version.
   #
   # LON-CAPA is distributed in the hope that it will be useful,
   # but WITHOUT ANY WARRANTY; without even the implied warranty of
   # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   # GNU General Public License for more details.
   #
   # You should have received a copy of the GNU General Public License
   # along with LON-CAPA; if not, write to the Free Software
   # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   #
   # /home/httpd/html/adm/gpl.txt
   #
   # http://www.lon-capa.org/
 #  #
 # 7/14,7/15,7/19,7/21,7/22,11/18,  
 # 2/8 Gerd Kortemeyer  
 # 12/23 Gerd Kortemeyer  
 # YEAR=2001  
 # 09/04,09/06,11/26 Gerd Kortemeyer  
   
 $|=1;  $|=1;
   use strict;
   
 use lib '/home/httpd/lib/perl/';  use lib '/home/httpd/lib/perl/';
 use LONCAPA::Configuration;  use LONCAPA::Configuration;
   use LONCAPA;
   use Apache::lonnet;
   use Apache::loncommon;
   
 use IO::File;  use IO::File;
 use IO::Socket;  use IO::Socket;
   use HTML::Entities;
   use Getopt::Long;
   #globals
   use vars qw (%perlvar %simplestatus $errors $warnings $notices $totalcount);
   
   my $statusdir="/home/httpd/html/lon-status";
   
 # -------------------------------------------------- Non-critical communication  
 sub reply {  
     my ($cmd,$server)=@_;  
     my $peerfile="$perlvar{'lonSockDir'}/$server";  
     my $client=IO::Socket::UNIX->new(Peer    =>"$peerfile",  
                                      Type    => SOCK_STREAM,  
                                      Timeout => 10)  
        or return "con_lost";  
     print $client "$cmd\n";  
     my $answer=<$client>;  
     chomp($answer);  
     if (!$answer) { $answer="con_lost"; }  
     return $answer;  
 }  
   
 # --------------------------------------------------------- Output error status  # --------------------------------------------------------- Output error status
   
   sub log {
       my $fh=shift;
       if ($fh) { print $fh @_  }
   }
   
 sub errout {  sub errout {
    my $fh=shift;     my $fh=shift;
    print $fh (<<ENDERROUT);     &log($fh,(<<ENDERROUT));
      <p><table border=2 bgcolor="#CCCCCC">       <table border="2" bgcolor="#CCCCCC">
      <tr><td>Notices</td><td>$notices</td></tr>       <tr><td>Notices</td><td>$notices</td></tr>
      <tr><td>Warnings</td><td>$warnings</td></tr>       <tr><td>Warnings</td><td>$warnings</td></tr>
      <tr><td>Errors</td><td>$errors</td></tr>       <tr><td>Errors</td><td>$errors</td></tr>
      </table><p><a href="#top">Top</a><p>       </table><p><a href="#top">Top</a></p>
 ENDERROUT  ENDERROUT
 }  }
   
   sub rotate_logfile {
       my ($file,$fh,$description) = @_;
       my $size=(stat($file))[7];
       if ($size>40000) {
    &log($fh,"<p>Rotating $description ...</p>");
    rename("$file.2","$file.3");
    rename("$file.1","$file.2");
    rename("$file","$file.1");
       } 
   }
   
 sub start_daemon {  sub start_daemon {
     my ($fh,$daemon,$pidfile) = @_;      my ($fh,$daemon,$pidfile,$args) = @_;
     my $progname=$daemon;      my $progname=$daemon;
     if ($daemon eq 'lonc' && $ARGV[0] eq 'new') {      if ($daemon eq 'lonc') {
  $progname='loncnew';    $progname='loncnew'; 
  print "new ";  
     }      }
     system("$perlvar{'lonDaemons'}/$progname 2>>$perlvar{'lonDaemons'}/logs/${daemon}_errors");      my $error_fname="$perlvar{'lonDaemons'}/logs/${daemon}_errors";
     sleep 2;      &rotate_logfile($error_fname,$fh,'error logs');
       if ($daemon eq 'lonc') {
    &clean_sockets($fh);
       }
       system("$perlvar{'lonDaemons'}/$progname 2>$perlvar{'lonDaemons'}/logs/${daemon}_errors");
       sleep 1;
     if (-e $pidfile) {      if (-e $pidfile) {
  print $fh "Seems like it started ...<p>";   &log($fh,"<p>Seems like it started ...</p>");
  my $lfh=IO::File->new("$pidfile");   my $lfh=IO::File->new("$pidfile");
  my $daemonpid=<$lfh>;   my $daemonpid=<$lfh>;
  chomp($daemonpid);   chomp($daemonpid);
  sleep 2;   if ($daemonpid =~ /^\d+$/ && kill 0 => $daemonpid) {
  if (kill 0 => $daemonpid) {  
     return 1;      return 1;
  } else {   } else {
     return 0;      return 0;
  }   }
     }      }
     print $fh "Seems like that did not work!<p>";      &log($fh,"<p>Seems like that did not work!</p>");
     $errors++;      $errors++;
     return 0;      return 0;
 }  }
   
 sub checkon_daemon {  sub checkon_daemon {
     my ($fh,$daemon,$maxsize,$sendusr1)=@_;      my ($fh,$daemon,$maxsize,$send,$args)=@_;
   
     print $fh '<hr><a name="'.$daemon.'"><h2>'.$daemon.'</h2><h3>Log</h3><pre>';      my $result;
     printf("%-10s ",$daemon);      &log($fh,'<hr /><a name="'.$daemon.'" /><h2>'.$daemon.'</h2><h3>Log</h3><p style="white-space: pre;"><tt>');
       printf("%-15s ",$daemon);
     if (-e "$perlvar{'lonDaemons'}/logs/$daemon.log"){      if (-e "$perlvar{'lonDaemons'}/logs/$daemon.log"){
  open (DFH,"tail -n25 $perlvar{'lonDaemons'}/logs/$daemon.log|");   open (DFH,"tail -n25 $perlvar{'lonDaemons'}/logs/$daemon.log|");
  while ($line=<DFH>) {    while (my $line=<DFH>) { 
     print $fh "$line";      &log($fh,"$line");
     if ($line=~/INFO/) { $notices++; }      if ($line=~/INFO/) { $notices++; }
     if ($line=~/WARNING/) { $notices++; }      if ($line=~/WARNING/) { $notices++; }
     if ($line=~/CRITICAL/) { $warnings++; }      if ($line=~/CRITICAL/) { $warnings++; }
  };   };
  close (DFH);   close (DFH);
     }      }
     print $fh "</pre>";      &log($fh,"</tt></p>");
           
     my $pidfile="$perlvar{'lonDaemons'}/logs/$daemon.pid";      my $pidfile="$perlvar{'lonDaemons'}/logs/$daemon.pid";
           
     my $restartflag=1;      my $restartflag=1;
           my $daemonpid;
     if (-e $pidfile) {      if (-e $pidfile) {
  my $lfh=IO::File->new("$pidfile");   my $lfh=IO::File->new("$pidfile");
  my $daemonpid=<$lfh>;   $daemonpid=<$lfh>;
  chomp($daemonpid);   chomp($daemonpid);
  if (kill 0 => $daemonpid) {   if ($daemonpid =~ /^\d+$/ && kill 0 => $daemonpid) {
     print $fh "<h3>$daemon at pid $daemonpid responding";      &log($fh,"<h3>$daemon at pid $daemonpid responding");
     if ($sendusr1) { print $fh ", sending USR1"; }      if ($send) { &log($fh,", sending $send"); }
     print $fh "</h3>";      &log($fh,"</h3>");
     if ($sendusr1) { kill USR1 => $daemonpid; }      if ($send eq 'USR1') { kill USR1 => $daemonpid; }
       if ($send eq 'USR2') { kill USR2 => $daemonpid; }
     $restartflag=0;      $restartflag=0;
     print "running\n";      if ($send eq 'USR2') {
    $result = 'reloaded';
    print "reloaded\n";
       } else {
    $result = 'running';
    print "running\n";
       }
  } else {   } else {
     $errors++;      $errors++;
     print $fh "<h3>$daemon at pid $daemonpid not responding</h3>";      &log($fh,"<h3>$daemon at pid $daemonpid not responding</h3>");
     $restartflag=1;      $restartflag=1;
     print $fh "<h3>Decided to clean up stale .pid file and restart $daemon</h3>";      &log($fh,"<h3>Decided to clean up stale .pid file and restart $daemon</h3>");
  }   }
     }      }
     if ($restartflag==1) {      if ($restartflag==1) {
  $simplestatus{$daemon}='off';   $simplestatus{$daemon}='off';
  $errors++;   $errors++;
  print $fh '<br><font color="red">Killall '.$daemon.': '.   my $kadaemon=$daemon;
     `killall $daemon 2>&1`.' - ';   if ($kadaemon eq 'lonmemcached') { $kadaemon='memcached'; }
  sleep 2;   &log($fh,'<br><font color="red">Killall '.$daemon.': '.
  print $fh unlink($pidfile).' - '.      `killall $kadaemon 2>&1`.' - ');
     `killall -9 $daemon 2>&1`.   sleep 1;
     '</font><br>';   &log($fh,unlink($pidfile).' - '.
  print $fh "<h3>$daemon not running, trying to start</h3>";      `killall -9 $kadaemon 2>&1`.
       '</font><br>');
    &log($fh,"<h3>$daemon not running, trying to start</h3>");
   
  if (&start_daemon($fh,$daemon,$pidfile)) {   if (&start_daemon($fh,$daemon,$pidfile,$args)) {
     print $fh "<h3>$daemon at pid $daemonpid responding</h3>";      &log($fh,"<h3>$daemon at pid $daemonpid responding</h3>");
     $simplestatus{$daemon}='restarted';      $simplestatus{$daemon}='restarted';
       $result = 'started';
     print "started\n";      print "started\n";
  } else {   } else {
     $errors++;      $errors++;
     print $fh "<h3>$daemon at pid $daemonpid not responding</h3>";      &log($fh,"<h3>$daemon at pid $daemonpid not responding</h3>");
     print $fh "Give it one more try ...<p>";      &log($fh,"<p>Give it one more try ...</p>");
     print " ";      print " ";
     if (&start_daemon($fh,$daemon,$pidfile)) {      if (&start_daemon($fh,$daemon,$pidfile,$args)) {
  print $fh "<h3>$daemon at pid $daemonpid responding</h3>";   &log($fh,"<h3>$daemon at pid $daemonpid responding</h3>");
  $simplestatus{$daemon}='restarted';   $simplestatus{$daemon}='restarted';
    $result = 'started';
  print "started\n";   print "started\n";
     } else {      } else {
    $result = 'failed';
  print " failed\n";   print " failed\n";
  $simplestatus{$daemon}='failed';   $simplestatus{$daemon}='failed';
  $errors++; $errors++;   $errors++; $errors++;
  print $fh "<h3>$daemon at pid $daemonpid not responding</h3>";   &log($fh,"<h3>$daemon at pid $daemonpid not responding</h3>");
  print $fh "Unable to start $daemon<p>";   &log($fh,"<p>Unable to start $daemon</p>");
     }      }
  }   }
   
  if (-e "$perlvar{'lonDaemons'}/logs/$daemon.log"){   if (-e "$perlvar{'lonDaemons'}/logs/$daemon.log"){
     print $fh "<p><pre>";      &log($fh,"<p><pre>");
     open (DFH,"tail -n100 $perlvar{'lonDaemons'}/logs/$daemon.log|");      open (DFH,"tail -n100 $perlvar{'lonDaemons'}/logs/$daemon.log|");
     while ($line=<DFH>) {       while (my $line=<DFH>) { 
  print $fh "$line";   &log($fh,"$line");
  if ($line=~/WARNING/) { $notices++; }   if ($line=~/WARNING/) { $notices++; }
  if ($line=~/CRITICAL/) { $notices++; }   if ($line=~/CRITICAL/) { $notices++; }
     };      };
     close (DFH);      close (DFH);
     print $fh "</pre>";      &log($fh,"</pre></p>");
  }   }
     }      }
           
     $fname="$perlvar{'lonDaemons'}/logs/$daemon.log";      my $fname="$perlvar{'lonDaemons'}/logs/$daemon.log";
           &rotate_logfile($fname,$fh,'logs');
     my ($dev,$ino,$mode,$nlink,  
  $uid,$gid,$rdev,$size,  
  $atime,$mtime,$ctime,  
  $blksize,$blocks)=stat($fname);  
       
     if ($size>$maxsize) {  
  print $fh "Rotating logs ...<p>";  
  rename("$fname.2","$fname.3");  
  rename("$fname.1","$fname.2");  
  rename("$fname","$fname.1");  
     }  
   
     &errout($fh);      &errout($fh);
       return $result;
 }  }
 # ================================================================ Main Program  
   
 # --------------------------------- Read loncapa_apache.conf and loncapa.conf  
 my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');  
 %perlvar=%{$perlvarref};  
 undef $perlvarref;  
 delete $perlvar{'lonReceipt'}; # remove since sensitive and not needed  
 delete $perlvar{'lonSqlAccess'}; # remove since sensitive and not needed  
   
 # --------------------------------------- Make sure that LON-CAPA is configured  
 # I only test for one thing here (lonHostID).  This is just a safeguard.  
 if ('{[[[[lonHostID]]]]}' eq $perlvar{'lonHostID'}) {  
     print("Unconfigured machine.\n");  
     $emailto=$perlvar{'lonSysEMail'};  
     $hostname=`/bin/hostname`;  
     chop $hostname;  
     $hostname=~s/[^\w\.]//g; # make sure is safe to pass through shell  
     $subj="LON: Unconfigured machine $hostname";  
     system("echo 'Unconfigured machine $hostname.' |\  
  mailto $emailto -s '$subj' > /dev/null");  
     exit 1;  
 }  
   
 # ----------------------------- Make sure this process is running from user=www  
 my $wwwid=getpwnam('www');  
 if ($wwwid!=$<) {  
     print("User ID mismatch.  This program must be run as user 'www'\n");  
     $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";  
     $subj="LON: $perlvar{'lonHostID'} User ID mismatch";  
     system("echo 'User ID mismatch.  loncron must be run as user www.' |\  
  mailto $emailto -s '$subj' > /dev/null");  
     exit 1;  
 }  
   
 # ------------------------------------------------------------- Read hosts file  
 {  
     my $config=IO::File->new("$perlvar{'lonTabDir'}/hosts.tab");  
       
     while (my $configline=<$config>) {  
  my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);  
  if ($id && $domain && $role && $name && $ip) {  
     $hostname{$id}=$name;  
     $hostdom{$id}=$domain;  
     $hostip{$id}=$ip;  
     $hostrole{$id}=$role;  
     if ($domdescr) { $domaindescription{$domain}=$domdescr; }  
     if (($role eq 'library') && ($id ne $perlvar{'lonHostID'})) {  
  $libserv{$id}=$name;  
     }  
  } else {  
     if ($configline) {  
 # &logthis("Skipping hosts.tab line -$configline-");  
     }  
  }  
     }  
 }  
   
 # ------------------------------------------------------ Read spare server file  
 {  
     my $config=IO::File->new("$perlvar{'lonTabDir'}/spare.tab");  
       
     while (my $configline=<$config>) {  
  chomp($configline);  
  if (($configline) && ($configline ne $perlvar{'lonHostID'})) {  
     $spareid{$configline}=1;  
  }  
     }  
 }  
   
 # ---------------------------------------------------------------- Start report  
   
 $statusdir="/home/httpd/html/lon-status";  
   
 $errors=0;  
 $warnings=0;  
 $notices=0;  
   
 $now=time;  
 $date=localtime($now);  
   
 {  
     my $fh=IO::File->new(">$statusdir/newstatus.html");  
     my %simplestatus=();  
       
     print $fh (<<ENDHEADERS);  
 <html>  
 <head>  
 <title>LON Status Report $perlvar{'lonHostID'}</title>  
 </head>  
 <body bgcolor="#AAAAAA">  
 <a name="top">  
 <h1>LON Status Report $perlvar{'lonHostID'}</h1>  
 <h2>$date ($now)</h2>  
 <ol>  
 <li><a href="#configuration">Configuration</a>  
 <li><a href="#machine">Machine Information</a>  
 <li><a href="#tmp">Temporary Files</a>  
 <li><a href="#tokens">Session Tokens</a>  
 <li><a href="#httpd">httpd</a>  
 <li><a href="#lonsql">lonsql</a>  
 <li><a href="#lond">lond</a>  
 <li><a href="#lonc">lonc</a>  
 <li><a href="#lonhttpd">lonhttpd</a>  
 <li><a href="#lonnet">lonnet</a>  
 <li><a href="#connections">Connections</a>  
 <li><a href="#delayed">Delayed Messages</a>  
 <li><a href="#errcount">Error Count</a>  
 </ol>  
 <hr>  
 <a name="configuration">  
 <h2>Configuration</h2>  
 <h3>PerlVars</h3>  
 <table border=2>  
 ENDHEADERS  
   
     foreach $varname (sort(keys(%perlvar))) {  
  print $fh "<tr><td>$varname</td><td>$perlvar{$varname}</td></tr>\n";  
     }  
     print $fh "</table><h3>Hosts</h3><table border=2>";  
     foreach $id (sort(keys(%hostname))) {  
  print $fh   
     "<tr><td>$id</td><td>$hostdom{$id}</td><td>$hostrole{$id}</td>";  
  print $fh "<td>$hostname{$id}</td><td>$hostip{$id}</td></tr>\n";  
     }  
     print $fh "</table><h3>Spare Hosts</h3><ol>";  
     foreach $id (sort(keys(%spareid))) {  
  print $fh "<li>$id\n";  
     }  
       
     print $fh "</ol>\n";  
   
 # --------------------------------------------------------------------- Machine  # --------------------------------------------------------------------- Machine
       sub log_machine_info {
     print $fh '<hr><a name="machine"><h2>Machine Information</h2>';      my ($fh)=@_;
     print $fh "<h3>loadavg</h3>";      &log($fh,'<hr /><a name="machine" /><h2>Machine Information</h2>');
           &log($fh,"<h3>loadavg</h3>");
   
     open (LOADAVGH,"/proc/loadavg");      open (LOADAVGH,"/proc/loadavg");
     $loadavg=<LOADAVGH>;      my $loadavg=<LOADAVGH>;
     close (LOADAVGH);      close (LOADAVGH);
           
     print $fh "<tt>$loadavg</tt>";      &log($fh,"<tt>$loadavg</tt>");
           
     @parts=split(/\s+/,$loadavg);      my @parts=split(/\s+/,$loadavg);
     if ($parts[1]>4.0) {      if ($parts[1]>4.0) {
  $errors++;   $errors++;
     } elsif ($parts[1]>2.0) {      } elsif ($parts[1]>2.0) {
Line 327  ENDHEADERS Line 230  ENDHEADERS
  $notices++;   $notices++;
     }      }
   
     print $fh "<h3>df</h3>";      &log($fh,"<h3>df</h3>");
     print $fh "<pre>";      &log($fh,"<pre>");
   
     open (DFH,"df|");      open (DFH,"df|");
     while ($line=<DFH>) {       while (my $line=<DFH>) { 
  print $fh "$line";    &log($fh,&encode_entities($line,'<>&"')); 
  @parts=split(/\s+/,$line);   @parts=split(/\s+/,$line);
  $usage=$parts[4];   my $usage=$parts[4];
  $usage=~s/\W//g;   $usage=~s/\W//g;
  if ($usage>90) {    if ($usage>90) { 
     $warnings++;      $warnings++;
Line 347  ENDHEADERS Line 250  ENDHEADERS
  if ($usage>95) { $warnings++; $warnings++; $simplestatus{'diskfull'}++; }   if ($usage>95) { $warnings++; $warnings++; $simplestatus{'diskfull'}++; }
     }      }
     close (DFH);      close (DFH);
     print $fh "</pre>";      &log($fh,"</pre>");
   
   
     print $fh "<h3>ps</h3>";      &log($fh,"<h3>ps</h3>");
     print $fh "<pre>";      &log($fh,"<pre>");
     $psproc=0;      my $psproc=0;
   
     open (PSH,"ps -aux --cols 140 |");      open (PSH,"ps aux --cols 140 |");
     while ($line=<PSH>) {       while (my $line=<PSH>) { 
  print $fh "$line";    &log($fh,&encode_entities($line,'<>&"')); 
  $psproc++;   $psproc++;
     }      }
     close (PSH);      close (PSH);
     print $fh "</pre>";      &log($fh,"</pre>");
   
     if ($psproc>200) { $notices++; }      if ($psproc>200) { $notices++; }
     if ($psproc>250) { $notices++; }      if ($psproc>250) { $notices++; }
   
       &log($fh,"<h3>distprobe</h3>");
       &log($fh,"<pre>");
       open(DSH,"$perlvar{'lonDaemons'}/distprobe |");
       while (my $line=<DSH>) { 
    &log($fh,&encode_entities($line,'<>&"')); 
    $psproc++;
       }
       close(DSH);
       &log($fh,"</pre>");
   
     &errout($fh);      &errout($fh);
   }
   
 # --------------------------------------------------------------- clean out tmp  sub start_logging {
     print $fh '<hr><a name="tmp"><h2>Temporary Files</h2>';      my $fh=IO::File->new(">$statusdir/newstatus.html");
     $cleaned=0;      my %simplestatus=();
     $old=0;      my $now=time;
     while ($fname=<$perlvar{'lonDaemons'}/tmp/*>) {      my $date=localtime($now);
  my ($dev,$ino,$mode,$nlink,  
     $uid,$gid,$rdev,$size,  
     $atime,$mtime,$ctime,  
     $blksize,$blocks)=stat($fname);  
  $now=time;  
  $since=$now-$mtime;  
  if ($since>$perlvar{'lonExpire'}) {  
     $line='';  
     if (open(PROBE,$fname)) {  
  $line=<PROBE>;  
  close(PROBE);  
     }  
     unless ($line=~/^CHECKOUTTOKEN\&/) {  
  $cleaned++;  
  unlink("$fname");  
     } else {  
  if ($since>365*$perlvar{'lonExpire'}) {  
     $cleaned++;  
     unlink("$fname");  
  } else { $old++; }  
     }  
  }  
           
   
       &log($fh,(<<ENDHEADERS));
   <html>
   <head>
   <title>LON Status Report $perlvar{'lonHostID'}</title>
   </head>
   <body bgcolor="#AAAAAA">
   <a name="top" />
   <h1>LON Status Report $perlvar{'lonHostID'}</h1>
   <h2>$date ($now)</h2>
   <ol>
   <li><a href="#configuration">Configuration</a></li>
   <li><a href="#machine">Machine Information</a></li>
   <li><a href="#tmp">Temporary Files</a></li>
   <li><a href="#tokens">Session Tokens</a></li>
   <li><a href="#httpd">httpd</a></li>
   <li><a href="#lonsql">lonsql</a></li>
   <li><a href="#lond">lond</a></li>
   <li><a href="#lonc">lonc</a></li>
   <li><a href="#lonnet">lonnet</a></li>
   <li><a href="#connections">Connections</a></li>
   <li><a href="#delayed">Delayed Messages</a></li>
   <li><a href="#errcount">Error Count</a></li>
   </ol>
   <hr />
   <a name="configuration" />
   <h2>Configuration</h2>
   <h3>PerlVars</h3>
   <table border="2">
   ENDHEADERS
   
       foreach my $varname (sort(keys(%perlvar))) {
    &log($fh,"<tr><td>$varname</td><td>".
        &encode_entities($perlvar{$varname},'<>&"')."</td></tr>\n");
       }
       &log($fh,"</table><h3>Hosts</h3><table border='2'>");
       my %hostname = &Apache::lonnet::all_hostnames();
       foreach my $id (sort(keys(%hostname))) {
    my $role = (&Apache::lonnet::is_library($id) ? 'library'
                                        : 'access');
    &log($fh,
       "<tr><td>$id</td><td>".&Apache::lonnet::host_domain($id).
       "</td><td>".$role.
       "</td><td>".&Apache::lonnet::hostname($id)."</td></tr>\n");
       }
       &log($fh,"</table><h3>Spare Hosts</h3><ul>");
       foreach my $type (sort(keys(%Apache::lonnet::spareid))) {
    &log($fh,"<li>$type\n<ol>");
    foreach my $id (@{ $Apache::lonnet::spareid{$type} }) {
       &log($fh,"<li>$id</li>\n");
    }
    &log($fh,"</ol>\n</li>\n");
       }
       &log($fh,"</ul>\n");
       return $fh;
   }
   
   # --------------------------------------------------------------- clean out tmp
   sub clean_tmp {
       my ($fh)=@_;
       &log($fh,'<hr /><a name="tmp" /><h2>Temporary Files</h2>');
       my ($cleaned,$old,$removed) = (0,0,0);
       my %errors = (
                        dir       => [],
                        file      => [],
                        failopen  => [],
                    );
       my %error_titles = (
                            dir       => 'failed to remove empty directory:',
                            file      => 'failed to unlike stale file',
                            failopen  => 'failed to open file or directory'
                          );
       ($cleaned,$old,$removed) = &recursive_clean_tmp('',$cleaned,$old,$removed,\%errors);
       &log($fh,"Cleaned up: ".$cleaned." files; removed: $removed empty directories; (found: $old old checkout tokens)");
       foreach my $key (sort(keys(%errors))) {
           if (ref($errors{$key}) eq 'ARRAY') {
               if (@{$errors{$key}} > 0) {
                   &log($fh,"Error during cleanup ($error_titles{$key}):<ul><li>".
                        join('</li><li><tt>',@{$errors{$key}}).'</tt></li></ul><br />');
               }
           }
       }
   }
   
   sub recursive_clean_tmp {
       my ($subdir,$cleaned,$old,$removed,$errors) = @_;
       my $base = "$perlvar{'lonDaemons'}/tmp";
       my $path = $base;
       next if ($subdir =~ m{\.\./});
       next unless (ref($errors) eq 'HASH');
       unless ($subdir eq '') {
           $path .= '/'.$subdir;
       }
       if (opendir(my $dh,"$path")) {
           while (my $file = readdir($dh)) {
               next if ($file =~ /^\.\.?$/);
               my $fname = "$path/$file";
               if (-d $fname) {
                   my $innerdir;
                   if ($subdir eq '') {
                       $innerdir = $file;
                   } else {
                       $innerdir = $subdir.'/'.$file;
                   }
                   ($cleaned,$old,$removed) = 
                        &recursive_clean_tmp($innerdir,$cleaned,$old,$removed,$errors);
                   my @doms = &Apache::lonnet::current_machine_domains();
                   
                   if (open(my $dirhandle,$fname)) {
                       unless (($innerdir eq 'helprequests') ||
                               (($innerdir =~ /^addcourse/) && ($innerdir !~ m{/\d+$}))) {
                           my @contents = grep {!/^\.\.?$/} readdir($dirhandle);
                                         join('&&',@contents)."\n";    
                           if (scalar(grep {!/^\.\.?$/} readdir($dirhandle)) == 0) {
                               closedir($dirhandle);
                               if ($fname =~ m{^\Q$perlvar{'lonDaemons'}\E/tmp/}) {
                                   if (rmdir($fname)) {
                                       $removed ++;
                                   } elsif (ref($errors->{dir}) eq 'ARRAY') {
                                       push(@{$errors->{dir}},$fname);
                                   }
                               }
                           }
                       } else {
                           closedir($dirhandle);
                       }
                   }
               } else {
                   my ($dev,$ino,$mode,$nlink,
                       $uid,$gid,$rdev,$size,
                       $atime,$mtime,$ctime,
                       $blksize,$blocks)=stat($fname);
                   my $now=time;
                   my $since=$now-$mtime;
                   if ($since>$perlvar{'lonExpire'}) {
                       if ($subdir eq '') {
                           my $line='';
                           if ($fname =~ /\.db$/) {
                               if (unlink($fname)) {
                                   $cleaned++;
                               } elsif (ref($errors->{file}) eq 'ARRAY') {
                                   push(@{$errors->{file}},$fname);
                               }
                           } elsif (open(PROBE,$fname)) {
                               my $line='';
                               $line=<PROBE>;
                               close(PROBE);
                               if ($line=~/^CHECKOUTTOKEN\&/) {
                                   if ($since>365*$perlvar{'lonExpire'}) {
                                       if (unlink($fname)) {
                                           $cleaned++; 
                                       } elsif (ref($errors->{file}) eq 'ARRAY') {
                                           push(@{$errors->{file}},$fname);
                                       }
                                   } else {
                                       $old++;
                                   }
                               } else {
                                   if (unlink($fname)) {
                                       $cleaned++;
                                   } elsif (ref($errors->{file}) eq 'ARRAY') {
                                       push(@{$errors->{file}},$fname);
                                   }
                               }
                           } elsif (ref($errors->{failopen}) eq 'ARRAY') {
                               push(@{$errors->{failopen}},$fname); 
                           }
                       } else {
                           if (unlink($fname)) {
                               $cleaned++;
                           } elsif (ref($errors->{file}) eq 'ARRAY') {
                               push(@{$errors->{file}},$fname);
                           }
                       }
                   }
               }
           }
           closedir($dh);
       } elsif (ref($errors->{failopen}) eq 'ARRAY') {
           push(@{$errors->{failopen}},$path);
     }      }
     print $fh "Cleaned up ".$cleaned." files (".$old." old checkout tokens).";      return ($cleaned,$old,$removed);
   }
   
 # ------------------------------------------------------------ clean out lonIDs  # ------------------------------------------------------------ clean out lonIDs
     print $fh '<hr><a name="tokens"><h2>Session Tokens</h2>';  sub clean_lonIDs {
     $cleaned=0;      my ($fh)=@_;
     $active=0;      &log($fh,'<hr /><a name="tokens" /><h2>Session Tokens</h2>');
     while ($fname=<$perlvar{'lonIDsDir'}/*>) {      my $cleaned=0;
       my $active=0;
       while (my $fname=<$perlvar{'lonIDsDir'}/*>) {
  my ($dev,$ino,$mode,$nlink,   my ($dev,$ino,$mode,$nlink,
     $uid,$gid,$rdev,$size,      $uid,$gid,$rdev,$size,
     $atime,$mtime,$ctime,      $atime,$mtime,$ctime,
     $blksize,$blocks)=stat($fname);      $blksize,$blocks)=stat($fname);
  $now=time;   my $now=time;
  $since=$now-$mtime;   my $since=$now-$mtime;
  if ($since>$perlvar{'lonExpire'}) {   if ($since>$perlvar{'lonExpire'}) {
     $cleaned++;      $cleaned++;
     print $fh "Unlinking $fname<br>";      &log($fh,"Unlinking $fname<br>");
     unlink("$fname");      unlink("$fname");
  } else {   } else {
     $active++;      $active++;
  }   }
       }
       &log($fh,"<p>Cleaned up ".$cleaned." stale session token(s).</p>");
       &log($fh,"<h3>$active open session(s)</h3>");
   }
   
   # ----------------------------------------------------------- clean out sockets
   sub clean_sockets {
       my ($fh)=@_;
       my $cleaned=0;
       opendir(SOCKETS,$perlvar{'lonSockDir'});
       while (my $fname=readdir(SOCKETS)) {
    next if (-d $fname 
    || $fname=~/(mysqlsock|maximasock|rsock|\Q$perlvar{'lonSockDir'}\E)/);
    $cleaned++;
    &log($fh,"Unlinking $fname<br />");
    unlink("/home/httpd/sockets/$fname");
     }      }
     print $fh "<p>Cleaned up ".$cleaned." stale session token(s).";      &log($fh,"<p>Cleaned up ".$cleaned." stale sockets.</p>");
     print $fh "<h3>$active open session(s)</h3>";  }
   
 # ----------------------------------------------------------------------- httpd  
   
     print $fh '<hr><a name="httpd"><h2>httpd</h2><h3>Access Log</h3><pre>';  # ----------------------------------------------------------------------- httpd
   sub check_httpd_logs {
       my ($fh)=@_;
       &log($fh,'<hr /><a name="httpd" /><h2>httpd</h2><h3>Access Log</h3><pre>');
           
     open (DFH,"tail -n25 /etc/httpd/logs/access_log|");      open (DFH,"tail -n25 /etc/httpd/logs/access_log|");
     while ($line=<DFH>) { print $fh "$line" };      while (my $line=<DFH>) { &log($fh,&encode_entities($line,'<>&"')) };
     close (DFH);      close (DFH);
   
     print $fh "</pre><h3>Error Log</h3><pre>";      &log($fh,"</pre><h3>Error Log</h3><pre>");
   
     open (DFH,"tail -n25 /etc/httpd/logs/error_log|");      open (DFH,"tail -n25 /etc/httpd/logs/error_log|");
     while ($line=<DFH>) {       while (my $line=<DFH>) { 
  print $fh "$line";   &log($fh,"$line");
  if ($line=~/\[error\]/) { $notices++; }    if ($line=~/\[error\]/) { $notices++; } 
     };      }
     close (DFH);      close (DFH);
     print $fh "</pre>";      &log($fh,"</pre>");
     &errout($fh);      &errout($fh);
   }
   
 # ---------------------------------------------------------------------- lonsql  
   
     &checkon_daemon($fh,'lonsql',200000);  
   
 # ------------------------------------------------------------------------ lond  
   
     &checkon_daemon($fh,'lond',40000,1);  
   
 # ------------------------------------------------------------------------ lonc  
   
     &checkon_daemon($fh,'lonc',40000,1);  
   
 # -------------------------------------------------------------------- lonhttpd  
   
     &checkon_daemon($fh,'lonhttpd',40000);  
   
 # ---------------------------------------------------------------------- lonnet  # ---------------------------------------------------------------------- lonnet
   
     print $fh '<hr><a name="lonnet"><h2>lonnet</h2><h3>Temp Log</h3><pre>';  sub rotate_lonnet_logs {
       my ($fh)=@_;
       &log($fh,'<hr /><a name="lonnet" /><h2>lonnet</h2><h3>Temp Log</h3><pre>');
     print "checking logs\n";      print "checking logs\n";
     if (-e "$perlvar{'lonDaemons'}/logs/lonnet.log"){      if (-e "$perlvar{'lonDaemons'}/logs/lonnet.log"){
  open (DFH,"tail -n50 $perlvar{'lonDaemons'}/logs/lonnet.log|");   open (DFH,"tail -n50 $perlvar{'lonDaemons'}/logs/lonnet.log|");
  while ($line=<DFH>) {    while (my $line=<DFH>) { 
     print $fh "$line";      &log($fh,&encode_entities($line,'<>&"'));
  };   }
  close (DFH);   close (DFH);
     }      }
     print $fh "</pre><h3>Perm Log</h3><pre>";      &log($fh,"</pre><h3>Perm Log</h3><pre>");
           
     if (-e "$perlvar{'lonDaemons'}/logs/lonnet.perm.log") {      if (-e "$perlvar{'lonDaemons'}/logs/lonnet.perm.log") {
  open(DFH,"tail -n10 $perlvar{'lonDaemons'}/logs/lonnet.perm.log|");   open(DFH,"tail -n10 $perlvar{'lonDaemons'}/logs/lonnet.perm.log|");
  while ($line=<DFH>) {    while (my $line=<DFH>) { 
     print $fh "$line";      &log($fh,&encode_entities($line,'<>&"'));
  };   }
  close (DFH);   close (DFH);
     } else { print $fh "No perm log\n" }      } else { &log($fh,"No perm log\n") }
   
     $fname="$perlvar{'lonDaemons'}/logs/lonnet.log";      my $fname="$perlvar{'lonDaemons'}/logs/lonnet.log";
       &rotate_logfile($fname,$fh,'lonnet log');
   
     my ($dev,$ino,$mode,$nlink,      &log($fh,"</pre>");
  $uid,$gid,$rdev,$size,      &errout($fh);
  $atime,$mtime,$ctime,  }
  $blksize,$blocks)=stat($fname);  
   
     if ($size>40000) {  sub rotate_other_logs {
  print $fh "Rotating logs ...<p>";      my ($fh) = @_;
  rename("$fname.2","$fname.3");      my %logs = (
  rename("$fname.1","$fname.2");                    autoenroll          => 'Auto Enroll log',
  rename("$fname","$fname.1");                    autocreate          => 'Create Course log',
                     searchcat           => 'Search Cataloguing log',
                     autoupdate          => 'Auto Update log',
                     refreshcourseids_db => 'Refresh CourseIDs db log',
                  );
       foreach my $item (keys(%logs)) {
           my $fname=$perlvar{'lonDaemons'}.'/logs/'.$item.'.log';
           &rotate_logfile($fname,$fh,$logs{$item});
     }      }
   }
   
     print $fh "</pre>";  
     &errout($fh);  
 # ----------------------------------------------------------------- Connections  # ----------------------------------------------------------------- Connections
   sub test_connections {
     print $fh '<hr><a name="connections"><h2>Connections</h2>';      my ($fh)=@_;
       &log($fh,'<hr /><a name="connections" /><h2>Connections</h2>');
     print "testing connections\n";      print "testing connections\n";
     print $fh "<table border=2>";      &log($fh,"<table border='2'>");
     foreach $tryserver (sort(keys(%hostname))) {      my ($good,$bad)=(0,0);
       my %hostname = &Apache::lonnet::all_hostnames();
       foreach my $tryserver (sort(keys(%hostname))) {
  print(".");   print(".");
  $answer=reply("pong",$tryserver);   my $result;
    my $answer=&Apache::lonnet::reply("ping",$tryserver);
  if ($answer eq "$tryserver:$perlvar{'lonHostID'}") {   if ($answer eq "$tryserver:$perlvar{'lonHostID'}") {
     $result="<b>ok</b>";      $result="<b>ok</b>";
       $good++;
  } else {   } else {
     $result=$answer;      $result=$answer;
     $warnings++;      $warnings++;
     if ($answer eq 'con_lost') { $warnings++; }      if ($answer eq 'con_lost') {
    $bad++;
    $warnings++;
       } else {
    $good++; #self connection
       }
  }   }
  if ($answer =~ /con_lost/) { print(" $tryserver down\n"); }   if ($answer =~ /con_lost/) { print(" $tryserver down\n"); }
  print $fh "<tr><td>$tryserver</td><td>$result</td></tr>\n";   &log($fh,"<tr><td>$tryserver</td><td>$result</td></tr>\n");
   
     }      }
     print $fh "</table>";      &log($fh,"</table>");
       print "\n$good good, $bad bad connections\n";
     &errout($fh);      &errout($fh);
 # ------------------------------------------------------------ Delayed messages  }
   
   
     print $fh '<hr><a name="delayed"><h2>Delayed Messages</h2>';  # ------------------------------------------------------------ Delayed messages
   sub check_delayed_msg {
       my ($fh)=@_;
       &log($fh,'<hr /><a name="delayed" /><h2>Delayed Messages</h2>');
     print "checking buffers\n";      print "checking buffers\n";
       
       &log($fh,'<h3>Scanning Permanent Log</h3>');
   
     print $fh '<h3>Scanning Permanent Log</h3>';      my $unsend=0;
   
     $unsend=0;      my $dfh=IO::File->new("$perlvar{'lonDaemons'}/logs/lonnet.perm.log");
     {      while (my $line=<$dfh>) {
  my $dfh=IO::File->new("$perlvar{'lonDaemons'}/logs/lonnet.perm.log");   my ($time,$sdf,$dserv,$dcmd)=split(/:/,$line);
  while ($line=<$dfh>) {   if ($sdf eq 'F') { 
     ($time,$sdf,$dserv,$dcmd)=split(/:/,$line);      my $local=localtime($time);
     if ($sdf eq 'F') {       &log($fh,"<b>Failed: $time, $dserv, $dcmd</b><br>");
  $local=localtime($time);      $warnings++;
  print $fh "<b>Failed: $time, $dserv, $dcmd</b><br>";  
  $warnings++;  
     }  
     if ($sdf eq 'S') { $unsend--; }  
     if ($sdf eq 'D') { $unsend++; }  
  }   }
    if ($sdf eq 'S') { $unsend--; }
    if ($sdf eq 'D') { $unsend++; }
     }      }
     print $fh "Total unsend messages: <b>$unsend</b><p>\n";  
       &log($fh,"<p>Total unsend messages: <b>$unsend</b></p>\n");
     $warnings=$warnings+5*$unsend;      $warnings=$warnings+5*$unsend;
   
     if ($unsend) { $simplestatus{'unsend'}=$unsend; }      if ($unsend) { $simplestatus{'unsend'}=$unsend; }
     print $fh "<h3>Outgoing Buffer</h3>";      &log($fh,"<h3>Outgoing Buffer</h3>\n<pre>");
   # list directory with delayed messages and remember offline servers
       my %servers=();
     open (DFH,"ls -lF $perlvar{'lonSockDir'}/delayed|");      open (DFH,"ls -lF $perlvar{'lonSockDir'}/delayed|");
     while ($line=<DFH>) {       while (my $line=<DFH>) {
  print $fh "$line<br>";          my ($server)=($line=~/\.(\w+)$/);
     };          if ($server) { $servers{$server}=1; }
    &log($fh,&encode_entities($line,'<>&"'));
       }
       &log($fh,"</pre>\n");
     close (DFH);      close (DFH);
   # pong to all servers that have delayed messages
   # this will trigger a reverse connection, which should flush the buffers
       foreach my $tryserver (keys %servers) {
    my $answer=&Apache::lonnet::reply("pong",$tryserver);
    &log($fh,"Pong to $tryserver: $answer<br />");
       }
   }
   
 # ------------------------------------------------------------------------- End  sub finish_logging {
     print $fh "<a name=errcount>\n";      my ($fh)=@_;
       &log($fh,"<a name='errcount' />\n");
     $totalcount=$notices+4*$warnings+100*$errors;      $totalcount=$notices+4*$warnings+100*$errors;
     &errout($fh);      &errout($fh);
     print $fh "<h1>Total Error Count: $totalcount</h1>";      &log($fh,"<h1>Total Error Count: $totalcount</h1>");
     $now=time;      my $now=time;
     $date=localtime($now);      my $date=localtime($now);
     print $fh "<hr>$date ($now)</body></html>\n";      &log($fh,"<hr />$date ($now)</body></html>\n");
     print "lon-status webpage updated\n";      print "lon-status webpage updated\n";
     $fh->close();      $fh->close();
   
       if ($errors) { $simplestatus{'errors'}=$errors; }
       if ($warnings) { $simplestatus{'warnings'}=$warnings; }
       if ($notices) { $simplestatus{'notices'}=$notices; }
       $simplestatus{'time'}=time;
 }  }
 if ($errors) { $simplestatus{'errors'}=$errors; }  
 if ($warnings) { $simplestatus{'warnings'}=$warnings; }  
 if ($notices) { $simplestatus{'notices'}=$notices; }  
 $simplestatus{'time'}=time;  
   
 rename ("$statusdir/newstatus.html","$statusdir/index.html");  sub log_simplestatus {
 {      rename("$statusdir/newstatus.html","$statusdir/index.html");
       
     my $sfh=IO::File->new(">$statusdir/loncron_simple.txt");      my $sfh=IO::File->new(">$statusdir/loncron_simple.txt");
     foreach (keys %simplestatus) {      foreach (keys %simplestatus) {
  print $sfh $_.'='.$simplestatus{$_}.'&';   print $sfh $_.'='.$simplestatus{$_}.'&';
Line 574  rename ("$statusdir/newstatus.html","$st Line 685  rename ("$statusdir/newstatus.html","$st
     print $sfh "\n";      print $sfh "\n";
     $sfh->close();      $sfh->close();
 }  }
 if ($totalcount>200) {  
   sub write_loncaparevs {
       print "Retrieving LON-CAPA version information\n";
       if (open(my $fh,">$perlvar{'lonTabDir'}/loncaparevs.tab")) {
           my %hostname = &Apache::lonnet::all_hostnames();
           foreach my $id (sort(keys(%hostname))) {
               if ($id ne '') {
                   my $loncaparev;
                   eval {
                       local $SIG{ ALRM } = sub { die "TIMEOUT" };
                       alarm(10);
                       $loncaparev =
                           &Apache::lonnet::get_server_loncaparev('',$id,1,'loncron');
                       alarm(0);
                   };
                   if ($@ && $@ =~ m/TIMEOUT/) {
                       print "time out while contacting lonHost: $id for version\n";   
                   }
                   if ($loncaparev =~ /^[\w.\-]+$/) {
                       print $fh $id.':'.$loncaparev."\n";
                   }
               }
           }
           close($fh);
       }
       return;
   }
   
   sub write_serverhomeIDs {
       print "Retrieving LON-CAPA lonHostID information\n";
       if (open(my $fh,">$perlvar{'lonTabDir'}/serverhomeIDs.tab")) {
           my %name_to_host = &Apache::lonnet::all_names();
           foreach my $name (sort(keys(%name_to_host))) {
               if ($name ne '') {
                   if (ref($name_to_host{$name}) eq 'ARRAY') {
                       my $serverhomeID;
                       eval {
                           local $SIG{ ALRM } = sub { die "TIMEOUT" };
                           alarm(10);
                           $serverhomeID = 
                               &Apache::lonnet::get_server_homeID($name,1,'loncron');
                           alarm(0);
                       };
                       if ($@ && $@ =~ m/TIMEOUT/) {
                           print "Time out while contacting server: $name\n"; 
                       }
                       if ($serverhomeID ne '') {
                           print $fh $name.':'.$serverhomeID."\n";
                       } else {
                           print $fh $name.':'.$name_to_host{$name}->[0]."\n";
                       }
                   }
               }
           }
           close($fh);
       }
       return;
   }
   
   sub send_mail {
     print "sending mail\n";      print "sending mail\n";
     $emailto="$perlvar{'lonAdmEMail'}";      my $defdom = $perlvar{'lonDefDomain'};
     if ($totalcount>1000) {      my $origmail = $perlvar{'lonAdmEMail'};
       my $emailto = &Apache::loncommon::build_recipient_list(undef,
                                      'lonstatusmail',$defdom,$origmail);
       if ($totalcount>2500) {
  $emailto.=",$perlvar{'lonSysEMail'}";   $emailto.=",$perlvar{'lonSysEMail'}";
     }      }
     $subj="LON: $perlvar{'lonHostID'} E:$errors W:$warnings N:$notices";       my $subj="LON: $perlvar{'lonHostID'} E:$errors W:$warnings N:$notices"; 
     system("metasend -b -t $emailto -s '$subj' -f $statusdir/index.html -m text/html");  
       my $result=system("metasend -b -S 4000000 -t $emailto -s '$subj' -f $statusdir/index.html -m text/html >& /dev/null");
       if ($result != 0) {
    $result=system("mail -s '$subj' $emailto < $statusdir/index.html");
       }
 }  }
   
   sub usage {
       print(<<USAGE);
   loncron - housekeeping program that checks up on various parts of Lon-CAPA
   
   Options:
      --help     Display 
      --noemail  Do not send the status email
      --justcheckconnections  Only check the current status of the lonc/d
                                   connections, do not send emails do not
                                   check if the daemons are running, do not
                                   generate lon-status
      --justcheckdaemons      Only check that all of the Lon-CAPA daemons are
                                   running, do not send emails do not
                                   check the lonc/d connections, do not
                                   generate lon-status
      --justreload            Only tell the daemons to reload the config files,
    do not send emails do not
                                   check if the daemons are running, do not
                                   generate lon-status
                              
   USAGE
   }
   
   # ================================================================ Main Program
   sub main () {
       my ($help,$justcheckdaemons,$noemail,$justcheckconnections,
    $justreload);
       &GetOptions("help"                 => \$help,
    "justcheckdaemons"     => \$justcheckdaemons,
    "noemail"              => \$noemail,
    "justcheckconnections" => \$justcheckconnections,
    "justreload"           => \$justreload
    );
       if ($help) { &usage(); return; }
   # --------------------------------- Read loncapa_apache.conf and loncapa.conf
       my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
       %perlvar=%{$perlvarref};
       undef $perlvarref;
       delete $perlvar{'lonReceipt'}; # remove since sensitive and not needed
       delete $perlvar{'lonSqlAccess'}; # remove since sensitive and not needed
       chdir($perlvar{'lonDaemons'});
   # --------------------------------------- Make sure that LON-CAPA is configured
   # I only test for one thing here (lonHostID).  This is just a safeguard.
       if ('{[[[[lonHostID]]]]}' eq $perlvar{'lonHostID'}) {
    print("Unconfigured machine.\n");
    my $emailto=$perlvar{'lonSysEMail'};
    my $hostname=`/bin/hostname`;
    chop $hostname;
    $hostname=~s/[^\w\.]//g; # make sure is safe to pass through shell
    my $subj="LON: Unconfigured machine $hostname";
    system("echo 'Unconfigured machine $hostname.' |\
    mailto $emailto -s '$subj' > /dev/null");
    exit 1;
       }
   
   # ----------------------------- Make sure this process is running from user=www
       my $wwwid=getpwnam('www');
       if ($wwwid!=$<) {
    print("User ID mismatch.  This program must be run as user 'www'\n");
    my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
    my $subj="LON: $perlvar{'lonHostID'} User ID mismatch";
    system("echo 'User ID mismatch.  loncron must be run as user www.' |\
    mailto $emailto -s '$subj' > /dev/null");
    exit 1;
       }
   
   # -------------------------------------------- Force reload of host information
       &Apache::lonnet::load_hosts_tab(1);
       &Apache::lonnet::load_domain_tab(1);
       &Apache::lonnet::get_iphost(1);
   
   # ----------------------------------------- Force firewall update for lond port  
   
       if ((!$justcheckdaemons) && (!$justreload)) {
           my $now = time;
           my $tmpfile = $perlvar{'lonDaemons'}.'/tmp/lciptables_iphost_'.
                         $now.$$.int(rand(10000));
           if (open(my $fh,">$tmpfile")) {
               my %iphosts = &Apache::lonnet::get_iphost();
               foreach my $key (keys(%iphosts)) {
                   print $fh "$key\n";
               }
               close($fh);
               if (&LONCAPA::try_to_lock('/tmp/lock_lciptables')) {
                   my $execpath = $perlvar{'lonDaemons'}.'/lciptables';
                   system("$execpath $tmpfile");
                   unlink('/tmp/lock_lciptables');  # Remove the lock file. 
               }
               unlink($tmpfile);
           }
       }
   
   # ---------------------------------------------------------------- Start report
   
       $errors=0;
       $warnings=0;
       $notices=0;
   
   
       my $fh;
       if (!$justcheckdaemons && !$justcheckconnections && !$justreload) {
    $fh=&start_logging();
   
    &log_machine_info($fh);
    &clean_tmp($fh);
    &clean_lonIDs($fh);
    &check_httpd_logs($fh);
    &rotate_lonnet_logs($fh);
    &rotate_other_logs($fh);
       }
       if (!$justcheckconnections && !$justreload) {
    &checkon_daemon($fh,'lonmemcached',40000);
    &checkon_daemon($fh,'lonsql',200000);
    if ( &checkon_daemon($fh,'lond',40000,'USR1') eq 'running') {
       &checkon_daemon($fh,'lond',40000,'USR2');
    }
    &checkon_daemon($fh,'lonc',40000,'USR1');
           &checkon_daemon($fh,'lonmaxima',40000);
           &checkon_daemon($fh,'lonr',40000);
       }
       if ($justreload) {
    &checkon_daemon($fh,'lond',40000,'USR2');
    &checkon_daemon($fh,'lonc',40000,'USR2');
       }
       if ($justcheckconnections) {
    &test_connections($fh);
       }
       if (!$justcheckdaemons && !$justcheckconnections && !$justreload) {
    &check_delayed_msg($fh);
    &finish_logging($fh);
    &log_simplestatus();
           &write_loncaparevs();
           &write_serverhomeIDs();
   
    if ($totalcount>200 && !$noemail) { &send_mail(); }
       }
   }
   
   &main();
 1;  1;
   
   
Removed from v.1.45  
changed lines
  Added in v.1.90

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