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#!/bin/bash
#
# McAfee Antivirus Updater for Linux
# 
# Urs Beyerle, PSI
#

echo
echo "***************************************"
echo "* McAfee Antivirus Updater            *"
echo "***************************************"
echo

DOWNLOAD_DIR=/tmp/download-mcafee-dat
UVSCAN_DIR=/usr/local/uvscan
DAT_URL=http://linux.web.psi.ch/mirror/antivirus/mcafee/pub/datfiles/english


update_failed ()
{
    echo
    echo "***************************************"
    echo "* Update failed.                      *"
    echo "***************************************"
    rm -rf $DOWNLOAD_DIR
    echo
    exit 1
}

update_success ()
{
    echo
    echo "***************************************"
    echo "* Update completed successfully.      *"
    echo "***************************************"
    rm -rf $DOWNLOAD_DIR
    echo
    exit
}

update_notneeded ()
{
    echo
    echo "Nothing to be done..."
    rm -rf $DOWNLOAD_DIR
    echo
    exit
}

### create dir for download
rm -rf $DOWNLOAD_DIR
mkdir -p $DOWNLOAD_DIR
cd $DOWNLOAD_DIR

### get update.ini
echo "Download update.ini"
wget --quiet $DAT_URL/update.ini
if [ ! -e update.ini ]; then
    echo "Download failed."
    update_failed
fi

### do we need new Dat files?
Version=$( grep "DATVersion=" update.ini | cut -d"=" -f 2 | head -n 1 | sed 's/\r//' )
uvscan --version | grep $Version
if [ "$?" = "0" ]; then
    update_notneeded
fi

### get ZipFileName
dos2unix update.ini
ZipFileName=$( grep "FileName=dat-.*zip" update.ini | cut -d"=" -f 2 )
if [ ! $ZipFileName ]; then
    echo "Filename of dat-*.zip not found."
    update_failed
fi
    
### download $ZipFileName
echo "Download $ZipFileName ..."
wget $DAT_URL/$ZipFileName
if [ ! -e $ZipFileName ]; then
    echo "Download of $ZipFileName failed."
    update_failed
fi

### unzip and copy dat files
unzip $ZipFileName
DatFiles=$( ls *.dat )
if [ ${#DatFiles} == 0 ]; then
    echo "No dat files found."
    update_failed    
fi

echo "Copy *.dat files to $UVSCAN_DIR:"
for file in $DatFiles; do
    cp -a $file $UVSCAN_DIR/
    if [ "$?" != "0" ]; then
        echo "$file could not be copied."
    else
        echo "$file copied."
        chmod 644 $UVSCAN_DIR/$file
    fi
done

echo 
uvscan --version
update_success