--- loncom/lond	2000/05/01 20:22:39	1.11
+++ loncom/lond	2001/10/23 04:38:45	1.53
@@ -5,7 +5,19 @@
 # 7/8,7/9,7/10,7/12,7/17,7/19,9/21,
 # 10/7,10/8,10/9,10/11,10/13,10/15,11/4,11/16,
 # 12/7,12/15,01/06,01/11,01/12,01/14,2/8,
-# 03/07 Gerd Kortemeyer
+# 03/07,05/31 Gerd Kortemeyer
+# 06/26 Scott Harrison
+# 06/29,06/30,07/14,07/15,07/17,07/20,07/25,09/18 Gerd Kortemeyer
+# 12/05 Scott Harrison
+# 12/05,12/13,12/29 Gerd Kortemeyer
+# Jan 01 Scott Harrison
+# 02/12 Gerd Kortemeyer
+# 03/15 Scott Harrison
+# 03/24 Gerd Kortemeyer
+# 04/02 Scott Harrison
+# 05/11,05/28,08/30 Gerd Kortemeyer
+# 9/30,10/22 Scott Harrison
+#
 # based on "Perl Cookbook" ISBN 1-56592-243-3
 # preforker - server who forks first
 # runs as a daemon
@@ -21,6 +33,25 @@ use Crypt::IDEA;
 use LWP::UserAgent();
 use GDBM_File;
 use Authen::Krb4;
+use lib '/home/httpd/lib/perl/';
+use localauth;
+
+# grabs exception and records it to log before exiting
+sub catchexception {
+    my ($error)=@_;
+    $SIG{'QUIT'}='DEFAULT';
+    $SIG{__DIE__}='DEFAULT';
+    &logthis("<font color=red>CRITICAL: "
+     ."ABNORMAL EXIT. Child $$ for server $wasserver died through "
+     ."a crash with this error msg->[$error]</font>");
+    if ($client) { print $client "error: $error\n"; }
+    die($error);
+}
+
+# -------------------------------- Set signal handlers to record abnormal exits
+
+$SIG{'QUIT'}=\&catchexception;
+$SIG{__DIE__}=\&catchexception;
 
 # ------------------------------------ Read httpd access.conf and get variables
 
@@ -35,6 +66,27 @@ while ($configline=<CONFIG>) {
 }
 close(CONFIG);
 
+# ----------------------------- Make sure this process is running from user=www
+my $wwwid=getpwnam('www');
+if ($wwwid!=$<) {
+   $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
+   $subj="LON: $perlvar{'lonHostID'} User ID mismatch";
+   system("echo 'User ID mismatch.  lond must be run as user www.' |\
+ mailto $emailto -s '$subj' > /dev/null");
+   exit 1;
+}
+
+# --------------------------------------------- Check if other instance running
+
+my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
+
+if (-e $pidfile) {
+   my $lfh=IO::File->new("$pidfile");
+   my $pide=<$lfh>;
+   chomp($pide);
+   if (kill 0 => $pide) { die "already running"; }
+}
+
 $PREFORK=4; # number of children to maintain, at least four spare
 
 # ------------------------------------------------------------- Read hosts file
@@ -89,6 +141,7 @@ sub HUPSMAN {                      # sig
     kill 'INT' => keys %children;
     close($server);                # free up socket
     &logthis("<font color=red>CRITICAL: Restarting</font>");
+    unlink("$execdir/logs/lond.pid");
     my $execdir=$perlvar{'lonDaemons'};
     exec("$execdir/lond");         # here we go again
 }
@@ -184,13 +237,37 @@ sub reply {
   return $answer;
 }
 
+# -------------------------------------------------------------- Talk to lonsql
+
+sub sqlreply {
+    my ($cmd)=@_;
+    my $answer=subsqlreply($cmd);
+    if ($answer eq 'con_lost') { $answer=subsqlreply($cmd); }
+    return $answer;
+}
+
+sub subsqlreply {
+    my ($cmd)=@_;
+    my $unixsock="mysqlsock";
+    my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
+    my $sclient=IO::Socket::UNIX->new(Peer    =>"$peerfile",
+                                      Type    => SOCK_STREAM,
+                                      Timeout => 10)
+       or return "con_lost";
+    print $sclient "$cmd\n";
+    my $answer=<$sclient>;
+    chomp($answer);
+    if (!$answer) { $answer="con_lost"; }
+    return $answer;
+}
+
 # -------------------------------------------- Return path to profile directory
 
 sub propath {
     my ($udom,$uname)=@_;
     $udom=~s/\W//g;
     $uname=~s/\W//g;
-    my $subdir=$uname;
+    my $subdir=$uname.'__';
     $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
     my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
     return $proname;
@@ -274,6 +351,8 @@ sub make_new_child {
         # unblock signals
         sigprocmask(SIG_UNBLOCK, $sigset)
             or die "Can't unblock SIGINT for fork: $!\n";
+
+        $tmpsnum=0;
     
         # handle connections until we've reached $MAX_CLIENTS_PER_CHILD
         for ($i=0; $i < $MAX_CLIENTS_PER_CHILD; $i++) {
@@ -288,7 +367,8 @@ sub make_new_child {
             my $clientip=inet_ntoa($iaddr);
             my $clientrec=($hostid{$clientip} ne undef);
             &logthis(
-"<font color=yellow>INFO: Connect from $clientip ($hostid{$clientip})</font>");
+"<font color=yellow>INFO: Connection $i, $clientip ($hostid{$clientip})</font>"
+            );
             my $clientok;
             if ($clientrec) {
 	      my $remotereq=<$client>;
@@ -304,15 +384,18 @@ sub make_new_child {
                   } else {
 		      &logthis(
  "<font color=blue>WARNING: $clientip did not reply challenge</font>");
+                      print $client "bye\n";
                   }
               } else {
 		  &logthis(
                     "<font color=blue>WARNING: "
                    ."$clientip failed to initialize: >$remotereq< </font>");
+		  print $client "bye\n";
               }
 	    } else {
               &logthis(
  "<font color=blue>WARNING: Unknown client $clientip</font>");
+              print $client "bye\n";
             }
             if ($clientok) {
 # ---------------- New known client connecting, could mean machine online again
@@ -389,14 +472,27 @@ sub make_new_child {
 				  (crypt($upass,$contentpwd) eq $contentpwd);
                           } elsif ($howpwd eq 'unix') {
                               $contentpwd=(getpwnam($uname))[1];
-                              $pwdcorrect=
-                                  (crypt($upass,$contentpwd) eq $contentpwd);
+			      my $pwauth_path="/usr/local/sbin/pwauth";
+			      unless ($contentpwd eq 'x') {
+				  $pwdcorrect=
+                                    (crypt($upass,$contentpwd) eq $contentpwd);
+			      }
+			      elsif (-e $pwauth_path) {
+				  open PWAUTH, "|$pwauth_path" or
+				      die "Cannot invoke authentication";
+				  print PWAUTH "$uname\n$upass\n";
+				  close PWAUTH;
+				  $pwdcorrect=!$?;
+			      }
                           } elsif ($howpwd eq 'krb4') {
                               $pwdcorrect=(
                                  Authen::Krb4::get_pw_in_tkt($uname,"",
                                         $contentpwd,'krbtgt',$contentpwd,1,
 							     $upass) == 0);
-                          }
+                          } elsif ($howpwd eq 'localauth') {
+			    $pwdcorrect=&localauth::localauth($uname,$upass,
+							      $contentpwd);
+			  }
                           if ($pwdcorrect) {
                              print $client "authorized\n";
                           } else {
@@ -414,6 +510,8 @@ sub make_new_child {
                        my 
                        ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);
                        chomp($npass);
+                       $upass=&unescape($upass);
+                       $npass=&unescape($npass);
                        my $proname=propath($udom,$uname);
                        my $passfilename="$proname/passwd";
                        if (-e $passfilename) {
@@ -428,7 +526,7 @@ sub make_new_child {
                              $salt=substr($salt,6,2);
 			     my $ncpass=crypt($npass,$salt);
                              { my $pf = IO::File->new(">$passfilename");
- 	  		       print $pf "internal:$ncpass\n";; }             
+ 	  		       print $pf "internal:$ncpass\n"; }             
                              print $client "ok\n";
                            } else {
                              print $client "non_authorized\n";
@@ -442,6 +540,80 @@ sub make_new_child {
 		     } else {
 		       print $client "refused\n";
 		     }
+# -------------------------------------------------------------------- makeuser
+                   } elsif ($userinput =~ /^makeuser/) {
+		     if ($wasenc==1) {
+                       my 
+                       ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
+                       chomp($npass);
+                       $npass=&unescape($npass);
+                       my $proname=propath($udom,$uname);
+                       my $passfilename="$proname/passwd";
+                       if (-e $passfilename) {
+			   print $client "already_exists\n";
+                       } elsif ($udom ne $perlvar{'lonDefDomain'}) {
+                           print $client "not_right_domain\n";
+                       } else {
+                           @fpparts=split(/\//,$proname);
+                           $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
+                           $fperror='';
+                           for ($i=3;$i<=$#fpparts;$i++) {
+                               $fpnow.='/'.$fpparts[$i]; 
+                               unless (-e $fpnow) {
+				   unless (mkdir($fpnow,0777)) {
+                                      $fperror="error:$!\n";
+                                   }
+                               }
+                           }
+                           unless ($fperror) {
+			     if ($umode eq 'krb4') {
+                               { 
+                                 my $pf = IO::File->new(">$passfilename");
+ 	  		         print $pf "krb4:$npass\n"; 
+                               }             
+                               print $client "ok\n";
+                             } elsif ($umode eq 'internal') {
+			       my $salt=time;
+                               $salt=substr($salt,6,2);
+			       my $ncpass=crypt($npass,$salt);
+                               { 
+                                 my $pf = IO::File->new(">$passfilename");
+ 	  		         print $pf "internal:$ncpass\n"; 
+                               }
+                               print $client "ok\n";
+			     } elsif ($umode eq 'localauth') {
+			       {
+				 my $pf = IO::File->new(">$passfilename");
+  	  		         print $pf "localauth:$npass\n";
+			       }
+			       print $client "ok\n";
+			     } elsif ($umode eq 'unix') {
+			       {
+				 my $execpath="$perlvar{'lonDaemons'}/".
+				              "lcuseradd";
+			         my $se = IO::File->new("|$execpath");
+				 print $se "$uname\n";
+				 print $se "$npass\n";
+				 print $se "$npass\n";
+                                 my $pf = IO::File->new(">$passfilename");
+ 	  		         print $pf "unix:\n"; 
+			       }
+			     } elsif ($umode eq 'none') {
+                               { 
+                                 my $pf = IO::File->new(">$passfilename");
+ 	  		         print $pf "none:\n"; 
+                               }             
+                               print $client "ok\n";
+                             } else {
+                               print $client "auth_mode_error\n";
+                             }  
+                           } else {
+                               print $client "$fperror\n";
+                           }
+                       }
+		     } else {
+		       print $client "refused\n";
+		     }
 # ------------------------------------------------------------------------ home
                    } elsif ($userinput =~ /^home/) {
                        my ($cmd,$udom,$uname)=split(/:/,$userinput);
@@ -479,11 +651,21 @@ sub make_new_child {
                              $response=$ua->request($request,$transname);
 			      }
                              if ($response->is_error()) {
-				 unline($transname);
+				 unlink($transname);
                                  my $message=$response->status_line;
                                  &logthis(
                                   "LWP GET: $message for $fname ($remoteurl)");
                              } else {
+	                         if ($remoteurl!~/\.meta$/) {
+                                  my $ua=new LWP::UserAgent;
+                                  my $mrequest=
+                                   new HTTP::Request('GET',$remoteurl.'.meta');
+                                  my $mresponse=
+                                   $ua->request($mrequest,$fname.'.meta');
+                                  if ($mresponse->is_error()) {
+		                    unlink($fname.'.meta');
+                                  }
+	                         }
                                  rename($transname,$fname);
 			     }
                           }
@@ -512,20 +694,45 @@ sub make_new_child {
                        my $ownership=ishome($fname);
                        if ($ownership eq 'owner') {
                         if (-e $fname) {
+			 if (-d $fname) {
+			   print $client "directory\n";
+                         } else {
                            $now=time;
                            { 
-                            my $sh=IO::File->new(">$fname.$hostid{$clientip}");
-                            print $sh "$clientip:$now\n";
+			    my $sh;
+                            if ($sh=
+                             IO::File->new(">$fname.$hostid{$clientip}")) {
+                               print $sh "$clientip:$now\n";
+			    }
 			   }
+                           unless ($fname=~/\.meta$/) {
+			       unlink("$fname.meta.$hostid{$clientip}");
+                           }
                            $fname=~s/\/home\/httpd\/html\/res/raw/;
                            $fname="http://$thisserver/".$fname;
                            print $client "$fname\n";
+		         }
                         } else {
 		      	   print $client "not_found\n";
                         }
 		       } else {
                         print $client "rejected\n";
 		       }
+# ------------------------------------------------------------------------- log
+                   } elsif ($userinput =~ /^log/) {
+                       my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);
+                       chomp($what);
+                       my $proname=propath($udom,$uname);
+                       my $now=time;
+                       {
+			 my $hfh;
+			 if ($hfh=IO::File->new(">>$proname/activity.log")) { 
+                            print $hfh "$now:$hostid{$clientip}:$what\n";
+                            print $client "ok\n"; 
+			} else {
+                            print $client "error:$!\n";
+		        }
+		       }
 # ------------------------------------------------------------------------- put
                    } elsif ($userinput =~ /^put/) {
                       my ($cmd,$udom,$uname,$namespace,$what)
@@ -536,7 +743,7 @@ sub make_new_child {
                        chomp($what);
                        my $proname=propath($udom,$uname);
                        my $now=time;
-                       {
+                       unless ($namespace=~/^nohist\_/) {
 			   my $hfh;
 			   if (
                              $hfh=IO::File->new(">>$proname/$namespace.hist")
@@ -603,7 +810,7 @@ sub make_new_child {
                        my @queries=split(/\&/,$what);
                        my $proname=propath($udom,$uname);
                        my $qresult='';
-      if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
+      if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
                            for ($i=0;$i<=$#queries;$i++) {
                                $qresult.="$hash{$queries[$i]}&";
                            }
@@ -626,7 +833,7 @@ sub make_new_child {
                        my @queries=split(/\&/,$what);
                        my $proname=propath($udom,$uname);
                        my $qresult='';
-      if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
+      if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
                            for ($i=0;$i<=$#queries;$i++) {
                                $qresult.="$hash{$queries[$i]}&";
                            }
@@ -661,7 +868,7 @@ sub make_new_child {
                        chomp($what);
                        my $proname=propath($udom,$uname);
                        my $now=time;
-                       {
+                       unless ($namespace=~/^nohist\_/) {
 			   my $hfh;
 			   if (
                              $hfh=IO::File->new(">>$proname/$namespace.hist")
@@ -688,7 +895,7 @@ sub make_new_child {
                        $namespace=~s/\W//g;
                        my $proname=propath($udom,$uname);
                        my $qresult='';
-      if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
+      if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
                            foreach $key (keys %hash) {
                                $qresult.="$key&";
                            }
@@ -709,7 +916,7 @@ sub make_new_child {
                        $namespace=~s/\W//g;
                        my $proname=propath($udom,$uname);
                        my $qresult='';
-      if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
+      if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
                            foreach $key (keys %hash) {
                                $qresult.="$key=$hash{$key}&";
                            }
@@ -732,7 +939,7 @@ sub make_new_child {
                        chomp($what);
                        my $proname=propath($udom,$uname);
                        my $now=time;
-                       {
+                       unless ($namespace=~/^nohist\_/) {
 			   my $hfh;
 			   if (
                              $hfh=IO::File->new(">>$proname/$namespace.hist")
@@ -751,7 +958,8 @@ sub make_new_child {
                                $allkeys.=$key.':';
                                $hash{"$version:$rid:$key"}=$value;
                            }
-                           $allkeys=~s/:$//;
+                           $hash{"$version:$rid:timestamp"}=$now;
+                           $allkeys.='timestamp';
                            $hash{"$version:keys:$rid"}=$allkeys;
 			   if (untie(%hash)) {
                               print $client "ok\n";
@@ -773,7 +981,7 @@ sub make_new_child {
                        chomp($rid);
                        my $proname=propath($udom,$uname);
                        my $qresult='';
-      if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
+      if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
                 	   my $version=$hash{"version:$rid"};
                            $qresult.="version=$version&";
                            my $scope;
@@ -783,7 +991,7 @@ sub make_new_child {
                               my $key;
                               $qresult.="$scope:keys=$vkeys&";
                               foreach $key (@keys) {
-	     $qresult.="$version:$key=".$hash{"$scope:$rid:$key"}."&";
+	     $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
                               }                                  
                            }
 			   if (untie(%hash)) {
@@ -795,6 +1003,37 @@ sub make_new_child {
                        } else {
                            print $client "error:$!\n";
                        }
+# ------------------------------------------------------------------- querysend
+                   } elsif ($userinput =~ /^querysend/) {
+                       my ($cmd,$query,
+			   $custom,$customshow)=split(/:/,$userinput);
+		       $query=~s/\n*$//g;
+		       unless ($custom or $customshow) {
+			   print $client "".
+			       sqlreply("$hostid{$clientip}\&$query")."\n";
+		       }
+		       else {
+			   print $client "".
+			       sqlreply("$hostid{$clientip}\&$query".
+					"\&$custom"."\&$customshow")."\n";
+		       }
+# ------------------------------------------------------------------ queryreply
+                   } elsif ($userinput =~ /^queryreply/) {
+                       my ($cmd,$id,$reply)=split(/:/,$userinput); 
+		       my $store;
+                       my $execdir=$perlvar{'lonDaemons'};
+                       if ($store=IO::File->new(">$execdir/tmp/$id")) {
+			   $reply=~s/\&/\n/g;
+			   print $store $reply;
+			   close $store;
+			   my $store2=IO::File->new(">$execdir/tmp/$id.end");
+			   print $store2 "done\n";
+			   close $store2;
+			   print $client "ok\n";
+		       }
+		       else {
+			   print $client "error:$!\n";
+		       }
 # ----------------------------------------------------------------------- idput
                    } elsif ($userinput =~ /^idput/) {
                        my ($cmd,$udom,$what)=split(/:/,$userinput);
@@ -830,7 +1069,7 @@ sub make_new_child {
                        my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
                        my @queries=split(/\&/,$what);
                        my $qresult='';
-                 if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT,0640)) {
+                 if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER,0640)) {
                            for ($i=0;$i<=$#queries;$i++) {
                                $qresult.="$hash{$queries[$i]}&";
                            }
@@ -843,20 +1082,65 @@ sub make_new_child {
                        } else {
                            print $client "error:$!\n";
                        }
+# ---------------------------------------------------------------------- tmpput
+                   } elsif ($userinput =~ /^tmpput/) {
+                       my ($cmd,$what)=split(/:/,$userinput);
+		       my $store;
+                       $tmpsnum++;
+                       my $id=$$.'_'.$clientip.'_'.$tmpsnum;
+                       $id=~s/\W/\_/g;
+                       $what=~s/\n//g;
+                       my $execdir=$perlvar{'lonDaemons'};
+                       if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
+			   print $store $what;
+			   close $store;
+			   print $client "$id\n";
+		       }
+		       else {
+			   print $client "error:$!\n";
+		       }
+
+# ---------------------------------------------------------------------- tmpget
+                   } elsif ($userinput =~ /^tmpget/) {
+                       my ($cmd,$id)=split(/:/,$userinput);
+                       chomp($id);
+                       $id=~s/\W/\_/g;
+                       my $store;
+                       my $execdir=$perlvar{'lonDaemons'};
+                       if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
+                           my $reply=<$store>;
+			   print $client "$reply\n";
+                           close $store;
+		       }
+		       else {
+			   print $client "error:$!\n";
+		       }
+
 # -------------------------------------------------------------------------- ls
                    } elsif ($userinput =~ /^ls/) {
                        my ($cmd,$ulsdir)=split(/:/,$userinput);
                        my $ulsout='';
                        my $ulsfn;
                        if (-e $ulsdir) {
-                          while ($ulsfn=<$ulsdir/*>) {
-			     my @ulsstats=stat($ulsfn);
+			if (opendir(LSDIR,$ulsdir)) {
+                          while ($ulsfn=readdir(LSDIR)) {
+			     my @ulsstats=stat($ulsdir.'/'.$ulsfn);
                              $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
                           }
+                          closedir(LSDIR);
+		        }
 		       } else {
                           $ulsout='no_such_dir';
                        }
+                       if ($ulsout eq '') { $ulsout='empty'; }
                        print $client "$ulsout\n";
+# ------------------------------------------------------------------ Hanging up
+                   } elsif (($userinput =~ /^exit/) ||
+                            ($userinput =~ /^init/)) {
+                       &logthis(
+      "Client $clientip ($hostid{$clientip}) hanging up: $userinput");
+                       print $client "bye\n";
+		       last;
 # ------------------------------------------------------------- unknown command
                    } else {
                        # unknown command