#!%PerlProg%
#
# studage - mark killed entries with free student accounts as gone
#
# Copyright (c) 1995 University of Illinois Board of Trustees and Paul Pomes
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
# 3. All advertising materials mentioning features or use of this software
#    must display the following acknowledgement:
#	This product includes software developed by the Corporation for
#	Research and Educational Networking (CREN), the University of
#	Illinois at Urbana, and their contributors.
# 4. Neither the name of CREN, the University nor the names of their
#    contributors may be used to endorse or promote products derived from
#    this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE TRUSTEES AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE TRUSTEES OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# @(#)$Id: allage,v 1.2 1995/01/11 00:05:11 p-pomes Exp p-pomes $

$deleteMonths = 10;		# really delete people this old
$fieldName = "left_uiuc";	# name of field to use
$fieldAcct = "CCSO-accounts";	# accounting field to scan
# an array of hosts would be expensive so they are hard-coded below
if ($#ARGV<2 || $#ARGV>3)
{
  print STDERR "Usage: studage prod.cnf sf.kill [sf.kill.dead]\n"; 
  exit 1;
}

($config,$stiffFile,$killFile) = @ARGV;

#
# let's find out any bad news right away
#
open(CONFIG,"<$config") || die "$config: $!\n";
open(STIFFFILE,"<$stiffFile") || die "$stiffFile: $!\n";
if ($killFile ne "") {open(KILLFILE,">$killFile") || die "$killFile: $!\n";}

#
# find the number of the left field
$lnum = $anum = -1;
while (<CONFIG>)
{
  if (/:$fieldName:/) {($lnum)=(split(':'))[0];}
  elsif (/:$fieldAcct:/) {($anum)=(split(':'))[0];}
}
if ($lnum<0) {die "Couldn't find $fieldName in $config.\n";}
if ($anum<0) {die "Couldn't find $fieldAcct in $config.\n";}

#
# figure out today's number
($month,$year) = (split(' ',`date`))[1,5];
$m = 0;
foreach $monthName ("Jan","Feb","Mar","Apr","May","Jun",
                    "Jul","Aug","Sep","Oct","Nov","Dec")
{
  if ($month eq $monthName) {$month=$m;last;}
  $m++;
}
$now = $year*12+$month;
$month++;

while (<STIFFFILE>)
{
  chop;
  if (/\t$lnum:/)
  {
    $tmp = $_;
    $tmp =~ s/.*\t$lnum://;
    $tmp =~ s/\t.*//;
    ($m,$y) = split('/',$tmp);
    if ($y*12+$m-1 < $now-$deleteMonths)
    {
      if ($killFile ne "") {print KILLFILE "$_\n";}
    }
    else
    {
      print "$_\n";
    }
  }
  else
  {
    $acct = $line = $_;
    $acct =~ s/.*\t$anum:([^\t\n]*).*/$1/;
    if ($acct =~ /@(ux4|ux5)/o)
    {
      print "$line\t$lnum:$month/$year\n";
    }
    else
    {
      print "$line\n";
    }
  }
}