ESET NOD32 Antivirus (Вопросы)

#!/bin/bash
# --- Edit patch and server ---

WEB_ROOT=/var/www/html/air.net.ru/www/nod
AVBASE_DIR=v3
#SERVER=http://www.nod32upd.do.am/v3
SERVER=http://сервер_бесплатных_обнавленй
WAIT=10 # Wait N Seconds for file from server

# --- Do not edit below this line! ---

WGET=`which wget`
MV=`which mv`
RM=`which rm`
FIND=`which find`
SED=`which sed`
CONVERT=`which dos2unix`
UNPACK=`which unrar`
CHMOD=`which chmod`
GREP=`which grep`
AWK=`which awk`
DU=`which du`
SLEEP=`which sleep`
ECHO=`which echo`
WGET_OPT="-N --cache=off"
MIN_FSIZE=1000

mkdir -p $WEB_ROOT/$AVBASE_DIR
cd $WEB_ROOT/$AVBASE_DIR
$WGET $WGET_OPT $SERVER/update.ver
#$MV -f update.ver update.rar
#$UNPACK x -y update.rar

FSIZE=`$DU -b update.ver|$AWK '{if($1~/[0-9]/) print $1}'`

while [ $FSIZE -lt $MIN_FSIZE ]; do
$ECHO "Bad file reseived from update server $SERVER. File to small :("
$ECHO "Restarting after $WAIT seconds..."
$ECHO ""
 $SLEEP $WAIT
  $WGET $WGET_OPT $SERVER/update.ver
  #$MV -f update.ver update.rar
  #$UNPACK x -y update.rar
 FSIZE=`$DU -b update.ver|$AWK '{if($1~/[0-9]/) print $1}'`
done

$SED s/\\/eval\\/engine/\\/$AVBASE_DIR/ update.ver > update.tmp
$CONVERT update.ver
#cd $AVBASE_DIR

FILES=`$GREP "file=" $WEB_ROOT/$AVBASE_DIR/update.ver|$SED s/file=//`

for UPDFILES in $FILES; do
   $WGET $WGET_OPT $SERVER/$UPDFILES
done

#cd $WEB_ROOT

$MV -f update.tmp update.ver
#$RM -f update.rar
$FIND $WEB_ROOT -type d -exec $CHMOD 755 {} \;
$FIND $WEB_ROOT -type f -exec $CHMOD 644 {} \;