#!/usr/bin/perl -wT
use strict;
# generate-auto.home 
# written by Aaron Thompson
# notes:
#  => checks * in gidnumber 2000 and uses math_fac and cs_fac groups 
#     to determine which of the people w/ the gidnumber=2000 will get
#     ~ from math-cs. (if someone is in math_fac or cs_fac and does
#     NOT have a gidnumber=2000 in their LDAP entry they will NOT show
#     up in the output. If they need to be added to the output add them
#     to the include file.
#
#  => include file
#     -> file used is specified by the global variable $includeFile
#     -> valid lines start with a username folowed by one or more 
#        spaces (or tabs) then the server's full dns name
#        example:
#           thompson     math-cs.cns.uni.edu
#
#  => exclude file
#     -> file used is specified by the global variable $excludeFile
#     -> valid lines contain only a username to exclude a line for
#
# Changed by Michael Janssen  09/2001
# added $ldapsearchParams, options that persist through all executions of $ldapsearch
#
# Changed by Aaron Thompson 2003
# cleaned up code adding configuation section.

 #Configuration.
   my $includeFile    = "/usr/local/etc/generate-autohome.include"; 
      # line ex: ->thompson math-cs.cns.uni.edu<-
   my $excludeFile    = "/usr/local/etc/generate-autohome.exclude"; 
      # line ex: ->thompson<-
      
   my $DefaultMount = "* -intr,nosuid henon.cns.uni.edu:/home/&\n";
 
   my $ldapsearchParams = " -x -P 2"; 
   my $ldapsearchArgs = "";
   my $ldapsearch     = "/usr/bin/ldapsearch"; 

 #globals variabls
   my @temp; my @temp2;
   my %faculty; my %math_cs; 
   my %include; my @exclude;

   my $temp = ""; my $temp2 = "";
   my $math_csFlag = ""; my $excludeFlag = "";

 #Get it on.
   &clearENV;
   &loadExclude;
   &loadInclude;

   if (-e $ldapsearch){
     
     #get list of all faculty members
      $ldapsearchArgs = " gidnumber=2000 dn";
      @temp = `$ldapsearch $ldapsearchParams $ldapsearchArgs`;
      foreach $temp (@temp){if($temp =~ /uid=(\w{1,}).*/){$faculty{$1} = 1;}}#hcaerof
        
     #get list of all math_cs members
      $ldapsearchArgs = " cn=math_fac memberuid";
      @temp = `$ldapsearch $ldapsearchParams $ldapsearchArgs`;
      foreach $temp (@temp){if($temp =~ /memberuid: (\w{1,}).*/){$math_cs{$1} = 1;}}#hcaerof
        
      $ldapsearchArgs = " cn=cs_fac memberuid";
      @temp = `$ldapsearch $ldapsearchParams $ldapsearchArgs`;
      foreach $temp (@temp){if($temp =~ /memberuid: (\w{1,}).*/){$math_cs{$1} = 1;}}#hcaerof

     #empty @temp
      while(@temp){pop(@temp);}#elihw
      while(@temp2){pop(@temp2);}#elihw

      delete @faculty{@exclude};
      delete @faculty{keys %math_cs};
      delete @math_cs{@exclude};

     #print faculty lines
      foreach $temp (keys %faculty){
         print "$temp -intr,nosuid faculty.cns.uni.edu:/home/$temp\n";
      }#hcaerof
   
     #print math-cs lines
      foreach $temp (keys %math_cs){
         print "$temp -intr,nosuid math-cs.cns.uni.edu:/home/$temp\n";
      }#hcaerof

     #print include lines
     delete @include{@exclude};
     foreach $temp (sort(keys(%include))){
         print "$temp -intr,nosuid $include{$temp}:/home/$temp\n";
     }#hcaerof

    #print auto for the students.
    print "$DefaultMount";
   }
   else{
      die "$ldapsearch not available!\n";
   }#fi   

exit(0);

######################################################################
sub clearENV{
   $ENV{PATH}     = "";
   $ENV{BASH_ENV} = "";
}#VNEraelc

######################################################################
sub loadExclude{
   my $temp = "";
   if(-e $excludeFile){
      open (IN, "$excludeFile") or die "$excludeFile could not be loaded";
         @temp = <IN>;
      close(IN);
   }#fi
   foreach $temp (@temp){
      if($temp =~ /(\w{1,}[\-\_]{0,1}\w{0,})/){push(@exclude,$1);}#fi
   }#hcaerof
}#edulcxEdaol

######################################################################
sub loadInclude{
   if(-e $includeFile){
      open(IN, "$includeFile") or die "$includeFile could not be loaded";;
         while(<IN>){
            if (/(\w{1,}[\-\_]{0,1}\w{0,})\s{1,}(\w{1,}[\-\_]{0,1}\w{0,}[\.]{1}\w{1,}[\-\_]{0,1}\w{0,}[\.]{1}\w{1,}[\-\_]{0,1}\w{0,}[\.]{1}\w{1,}[\-\_]{0,1}\w{0,}[\.]{1}\w{1,}[\-\_]{0,1}\w{0,})/){
               $include{$1} = $2;
            }
            elsif (/(\w{1,}[\-\_]{0,1}\w{0,})\s{1,}(\w{1,}[\-\_]{0,1}\w{0,}[\.]{1}\w{1,}[\-\_]{0,1}\w{0,}[\.]{1}\w{1,}[\-\_]{0,1}\w{0,}[\.]{1}\w{1,}[\-\_]{0,1}\w{0,})/){
              $include{$1} = $2;
            }
            elsif (/(\w{1,}[\-\_]{0,1}\w{0,})\s{1,}(\w{1,}[\-\_]{0,1}\w{0,}[\.]{1}\w{1,}[\-\_]{0,1}\w{0,}[\.]{1}\w{1,}[\-\_]{0,1}\w{0,})/){
              $include{$1} = $2;
            }#fi
         }#elihw
      close(IN);
   }#fi
}#edulcnIdaol

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