#!/bin/sh
#
#       @(#)procmail_jdfalk 1997/06/23 Anne Bennett
#
# Download jdfalk's lists of bad sites for blocking spam,
# reformat them for our site, and compare them to what
# we've got.  Report if different, and prepare new files.

PATH=/local/paths:/usr/bin:/sbin:/usr/sbin
export PATH

thisprog=procmail_jdfalk
logger="logger -p mail.info ${thisprog}:"

# "DOMAIN" will be replaced by the generic domain name for each
# batch of addresses.
url_base="ftp://ftp.cybernothing.org/pub/abuse/DOMAIN.domains"
cur_rc_base="/local/etc/procmail/spam/tag-jdfalk-DOMAIN"
new_rc_base="/local/etc/procmail/spam/NEW.tag-jdfalk-DOMAIN"
domains="linkus"
mailto="anne"

tmp_new=/tmp/${thisprog}.$$.tmp_new
tmp_old=/tmp/${thisprog}.$$.tmp_old
tmp_diff=/tmp/${thisprog}.$$.tmp_diff

all_tmp="${tmp_new} ${tmp_old} ${tmp_diff}"

# Start.
#
${logger} starting.

for dom in ${domains} ; do

    ${logger} doing ${dom}.
    
    url="`echo $url_base       | sed 's/DOMAIN/'${dom}'/'"
    cur_rc="`echo $cur_rc_base | sed 's/DOMAIN/'${dom}'/'"
    new_rc="`echo $new_rc_base | sed 's/DOMAIN/'${dom}'/'"
    
    # Download and format jdfalk material; note the date and time.
    #
    lynx -dump -source ${url}  \
       | sed -e 's%\.%\\.%g'   \
             -e '/^[ 	]*$/d'  \
             -e 's%^%\\<%'     \
             -e 's%$%\\>%'     \
       | gawk '{printf(":0 Hf\n* ^(Received|From|To|cc|Sender): .*%s\n| formail -b -f -A \"$trash_header siteban per-jdfalk-'${dom}'\"\n\n",$1)}' \
       > ${tmp_new}
    down_date=`date '+%Y/%m/%d %H:%M:%S %Z'`
    
    
    # Isolate our current jdfalk-derived material.
    #
    cat ${cur_rc} \
       | sed -n '/^# ========== jdfalk-derived material below ==========$/,$p' \
       | tail +2 \
       >> ${tmp_old}
    
    
    # Are they different?  If not, clean up and exit quietly.
    #
    diff ${tmp_old} ${tmp_new} > ${tmp_diff}
    if [ ! -s ${tmp_diff} ]; then
       # No changes.
       ${logger} no change in ${dom}.
       rm -f ${all_tmp}
       ${logger} end of ${dom}.
       exit
    fi
    
    
    # There were changes!  Prepare a new file and notify maintainer.
    #
    ${logger} changes found in ${dom}.
    cat ${cur_rc} \
       | sed -n '1,/^# ========== jdfalk-derived material below ==========$/p' \
       | sed -e "s%^# Last download on .*%# Last download on ${down_date}%" \
       > ${new_rc}
    cat ${tmp_new} >> ${new_rc}
    
    ${logger} notifying maintainer.
    ( echo ""
      echo "New jdfalk procmail data is in ${new_rc} for ${dom}"
      echo ""
      echo "Differences follow:"
      echo ""
      echo "===================================="
      echo ""
      cat ${tmp_diff}
    ) | mailx -s "New jdfalk-${dom} procmail data ready" ${mailto}
    
    
    # Clean up and leave
    rm -f ${all_tmp}
    ${logger} end of ${dom}.
done


${logger} end of run.
exit