source: installer/opengnsys_installer.sh @ 455906f

#!/bin/bash

#####################################################################
####### Script instalador OpenGnSys
####### autor: Luis Guillén <lguillen@unizar.es>
#####################################################################


####  AVISO: Puede editar configuración de acceso por defecto.
####  WARNING: Edit default access configuration if you wish.
DEFAULT_MYSQL_ROOT_PASSWORD="passwordroot"      # Clave por defecto root de MySQL
DEFAULT_OPENGNSYS_DB_USER="usuog"                   # Usuario por defecto de acceso a la base de datos
DEFAULT_OPENGNSYS_DB_PASSWD="passusuog"         # Clave por defecto de acceso a la base de datos
DEFAULT_OPENGNSYS_CLIENT_PASSWD="og"            # Clave por defecto de acceso del cliente       

# Sólo ejecutable por usuario root
if [ "$(whoami)" != 'root' ]; then
        echo "ERROR: this program must run under root privileges!!"
        exit 1
fi

echo -e "\\nOpenGnSys Installation"
echo "=============================="

# Clave root de MySQL
while : ; do
        echo -n -e "\\nEnter root password for MySQL (${DEFAULT_MYSQL_ROOT_PASSWORD}): ";
        read MYSQL_ROOT_PASSWORD
        if [ -n "${MYSQL_ROOT_PASSWORD//[a-zA-Z0-9]/}" ]; then # Comprobamos que sea un valor alfanumerico
                echo -e "\\aERROR: Must be alphanumeric, try again..."
        else
                if [ -z $MYSQL_ROOT_PASSWORD ]; then # Si esta vacio ponemos el valor por defecto
                        MYSQL_ROOT_PASSWORD=$DEFAULT_MYSQL_ROOT_PASSWORD
                fi
                break
        fi
done

# Usuario de acceso a la base de datos
while : ; do
        echo -n -e "\\nEnter username for OpenGnSys console (${DEFAULT_OPENGNSYS_DB_USER}): "
        read OPENGNSYS_DB_USER
        if [ -n "${OPENGNSYS_DB_USER//[a-zA-Z0-9]/}" ]; then # Comprobamos que sea un valor alfanumerico
                echo -e "\\aERROR: Must be alphanumeric, try again..."
        else
                if [ -z $OPENGNSYS_DB_USER ]; then # Si esta vacio ponemos el valor por defecto
                        OPENGNSYS_DB_USER=$DEFAULT_OPENGNSYS_DB_USER
                fi
                break
        fi
done

# Clave de acceso a la base de datos
while : ; do
        echo -n -e "\\nEnter password for OpenGnSys console (${DEFAULT_OPENGNSYS_DB_PASSWD}): "
        read OPENGNSYS_DB_PASSWD
        if [ -n "${OPENGNSYS_DB_PASSWD//[a-zA-Z0-9]/}" ]; then # Comprobamos que sea un valor alfanumerico
                echo -e "\\aERROR: Must be alphanumeric, try again..."
        else
                if [ -z $OPENGNSYS_DB_PASSWD ]; then # Si esta vacio ponemos el valor por defecto
                        OPENGNSYS_DB_PASSWD=$DEFAULT_OPENGNSYS_DB_PASSWD
                fi
                break
        fi
done

# Clave de acceso del cliente
while : ; do
        echo -n -e "\\nEnter root password for OpenGnSys client (${DEFAULT_OPENGNSYS_CLIENT_PASSWD}): "
        read OPENGNSYS_CLIENT_PASSWD
        if [ -n "${OPENGNSYS_CLIENT_PASSWD//[a-zA-Z0-9]/}" ]; then # Comprobamos que sea un valor alfanumerico
                echo -e "\\aERROR: Must be alphanumeric, try again..."
        else
                if [ -z $OPENGNSYS_CLIENT_PASSWD ]; then # Si esta vacio ponemos el valor por defecto
                        OPENGNSYS_CLIENT_PASSWD=$DEFAULT_OPENGNSYS_CLIENT_PASSWD
                fi
                break
        fi
done

echo -e "\\n=============================="

# Comprobar si se ha descargado el paquete comprimido (USESVN=0) o sólo el instalador (USESVN=1).
PROGRAMDIR=$(readlink -e $(dirname "$0"))
PROGRAMNAME=$(basename "$0")
OPENGNSYS_SERVER="www.opengnsys.es"
if [ -d "$PROGRAMDIR/../installer" ]; then
        USESVN=0
else
        USESVN=1
fi
SVN_URL="http://$OPENGNSYS_SERVER/svn/branches/version1.0/"

WORKDIR=/tmp/opengnsys_installer
mkdir -p $WORKDIR

# Directorio destino de OpenGnSys.
INSTALL_TARGET=/opt/opengnsys

# Registro de incidencias.
OGLOGFILE=$INSTALL_TARGET/log/${PROGRAMNAME%.sh}.log
LOG_FILE=/tmp/$(basename $OGLOGFILE)

# Usuario del cliente para acceso remoto.
OPENGNSYS_CLIENT_USER="opengnsys"

# Nombre de la base datos y fichero SQL para su creación.
OPENGNSYS_DATABASE="ogAdmBD"
OPENGNSYS_DB_CREATION_FILE=opengnsys/admin/Database/${OPENGNSYS_DATABASE}.sql


#####################################################################
####### Funciones de configuración
#####################################################################

# Generar variables de configuración del instalador
# Variables globales:
# - OSDISTRIB - tipo de distribución GNU/Linux
# - DEPENDENCIES - array de dependencias que deben estar instaladas
# - UPDATEPKGLIST, INSTALLPKGS, CHECKPKGS - comandos para gestión de paquetes
# - INSTALLEXTRADEPS - instalar dependencias no incluidas en la distribución
# - STARTSERVICE, ENABLESERVICE - iniciar y habilitar un servicio
# - STOPSERVICE, DISABLESERVICE - parar y deshabilitar un servicio
# - APACHESERV, APACHECFGDIR, APACHESITESDIR, APACHEUSER, APACHEGROUP - servicio y configuración de Apache
# - APACHESSLMOD, APACHEENABLESSL, APACHEMAKECERT - habilitar módulo Apache y certificado SSL
# - APACHEENABLEOG, APACHEOGSITE, - habilitar sitio web de OpenGnSys
# - INETDSERV - servicio Inetd
# - FIREWALLSERV - servicio de cortabuegos IPTables/FirewallD
# - DHCPSERV, DHCPCFGDIR - servicio y configuración de DHCP
# - MYSQLSERV, TMPMYCNF - servicio MySQL y fichero temporal con credenciales de acceso
# - MARIADBSERV - servicio MariaDB (sustituto de MySQL en algunas distribuciones)
# - RSYNCSERV, RSYNCCFGDIR - servicio y configuración de Rsync
# - SAMBASERV, SAMBACFGDIR - servicio y configuración de Samba
# - TFTPSERV, TFTPCFGDIR, SYSLINUXDIR - servicio y configuración de TFTP/PXE
function autoConfigure()
{
# Detectar sistema operativo del servidor (compatible con fichero os-release y con LSB).
if [ -f /etc/os-release ]; then
        source /etc/os-release
        OSDISTRIB="$ID"
else
        OSDISTRIB=$(lsb_release -is 2>/dev/null)
fi
# Convertir a minúsculas para evitar errores.
OSDISTRIB="${OSDISTRIB,,}"

# Configuración según la distribución GNU/Linux (usar minúsculas).
case "$OSDISTRIB" in
        ubuntu|debian|linuxmint)
                DEPENDENCIES=( subversion apache2 php5 php5-ldap libapache2-mod-php5 mysql-server php5-mysql isc-dhcp-server bittorrent tftp-hpa tftpd-hpa syslinux xinetd build-essential g++-multilib libmysqlclient15-dev wget doxygen graphviz bittornado ctorrent samba rsync unzip netpipes debootstrap schroot squashfs-tools btrfs-tools procps arp-scan )
                UPDATEPKGLIST="apt-get update"
                INSTALLPKG="apt-get -y install --force-yes"
                CHECKPKG="dpkg -s \$package 2>/dev/null | grep Status | grep -qw install"
                if which service &>/dev/null; then
                        STARTSERVICE="eval service \$service restart"
                        STOPSERVICE="eval service \$service stop"
                else
                        STARTSERVICE="eval /etc/init.d/\$service restart"
                        STOPSERVICE="eval /etc/init.d/\$service stop"
                fi
                ENABLESERVICE="eval update-rc.d \$service defaults"
                DISABLESERVICE="eval update-rc.d \$service disable"
                APACHESERV=apache2
                APACHECFGDIR=/etc/apache2
                APACHESITESDIR=sites-available
                APACHEOGSITE=opengnsys
                APACHEUSER="www-data"
                APACHEGROUP="www-data"
                APACHESSLMOD="a2enmod ssl"
                APACHEENABLESSL="a2ensite default-ssl"
                APACHEENABLEOG="a2ensite $APACHEOGSITE"
                APACHEMAKECERT="make-ssl-cert generate-default-snakeoil --force-overwrite"
                DHCPSERV=isc-dhcp-server
                DHCPCFGDIR=/etc/dhcp
                INETDSERV=xinetd
                INETDCFGDIR=/etc/xinetd.d
                MYSQLSERV=mysql
                MARIADBSERV=mariadb
                RSYNCSERV=rsync
                RSYNCCFGDIR=/etc
                SAMBASERV=smbd
                SAMBACFGDIR=/etc/samba
                SYSLINUXDIR=/usr/lib/syslinux
                TFTPCFGDIR=/var/lib/tftpboot
                ;;
        fedora|centos)
                DEPENDENCIES=( subversion httpd mod_ssl php php-ldap mysql-server mysql-devel mysql-devel.i686 php-mysql dhcp tftp-server tftp syslinux xinetd binutils gcc gcc-c++ glibc-devel glibc-devel.i686 glibc-static glibc-static.i686 libstdc++ libstdc++.i686 libstdc++-devel.i686 make wget doxygen graphviz ctorrent samba samba-client rsync unzip debootstrap schroot squashfs-tools python-crypto arp-scan )
                INSTALLEXTRADEPS=( 'rpm -Uv ftp://ftp.altlinux.org/pub/distributions/ALTLinux/5.1/branch/files/i586/RPMS/netpipes-4.2-alt1.i586.rpm' 
                                   'pushd /tmp; wget http://download.bittornado.com/download/BitTornado-0.3.18.tar.gz; tar xvzf BitTornado-0.3.18.tar.gz; cd BitTornado-CVS; python setup.py install; ln -fs btlaunchmany.py /usr/bin/btlaunchmany; ln -fs bttrack.py /usr/bin/bttrack; popd' )
                if [ "$OSDISTRIB" == "centos" ]; then
                        UPDATEPKGLIST='test rpm -q --quiet epel-release || echo -e "[epel]\nname=EPEL temporal\nmirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-\$releasever&arch=\$basearch\nenabled=1\ngpgcheck=0" >/etc/yum.repos.d/epel.repo'
                fi
                INSTALLPKG="yum install -y"
                CHECKPKG="rpm -q --quiet \$package"
                SYSTEMD=$(which systemctl 2>/dev/null)
                if [ -n "$SYSTEMD" ]; then
                        STARTSERVICE="eval systemctl start \$service.service"
                        STOPSERVICE="eval systemctl stop \$service.service"
                        ENABLESERVICE="eval systemctl enable \$service.service"
                        DISABLESERVICE="eval systemctl disable \$service.service"
                else
                        STARTSERVICE="eval service \$service start"
                        STOPSERVICE="eval service \$service stop"
                        ENABLESERVICE="eval chkconfig \$service on"
                        DISABLESERVICE="eval chkconfig \$service off"
                fi
                APACHESERV=httpd
                APACHECFGDIR=/etc/httpd/conf.d
                APACHEOGSITE=opengnsys.conf
                APACHEUSER="apache"
                APACHEGROUP="apache"
                DHCPSERV=dhcpd
                DHCPCFGDIR=/etc/dhcp
                if firewall-cmd --state &>/dev/null; then
                        FIREWALLSERV=firewalld
                else
                        FIREWALLSERV=iptables
                fi
                INETDSERV=xinetd
                INETDCFGDIR=/etc/xinetd.d
                MYSQLSERV=mysqld
                MARIADBSERV=mariadb
                RSYNCSERV=rsync
                RSYNCCFGDIR=/etc
                SAMBASERV=smb
                SAMBACFGDIR=/etc/samba
                SYSLINUXDIR=/usr/share/syslinux
                TFTPSERV=tftp
                TFTPCFGDIR=/var/lib/tftpboot
                ;;
        "")     echo "ERROR: Unknown Linux distribution, please install \"lsb_release\" command."
                exit 1 ;;
        *)      echo "ERROR: Distribution not supported by OpenGnSys."
                exit 1 ;;
esac

# Fichero de credenciales de acceso a MySQL.
TMPMYCNF=/tmp/.my.cnf.$$
}


# Modificar variables de configuración tras instalar paquetes del sistema.
function autoConfigurePost()
{
local f

# Configuraciones específicas para Samba y TFTP en Debian 6.
[ -z "$SYSTEMD" -a ! -e /etc/init.d/$SAMBASERV ] && SAMBASERV=samba
[ ! -e $TFTPCFGDIR ] && TFTPCFGDIR=/srv/tftp

# Configuraciones específicas para SELinux permisivo en distintas versiones.
[ -f /selinux/enforce ] && echo 0 > /selinux/enforce
for f in /etc/sysconfig/selinux /etc/selinux/config; do
        [ -f $f ] && perl -pi -e 's/SELINUX=enforcing/SELINUX=permissive/g' $f
done
selinuxenabled 2>/dev/null && setenforce 0 2>/dev/null
}


# Cargar lista de paquetes del sistema y actualizar algunas variables de configuración
# dependiendo de la versión instalada.
function updatePackageList()
{
local DHCPVERSION

# Si es necesario, actualizar la lista de paquetes disponibles.
[ -n "$UPDATEPKGLIST" ] && eval $UPDATEPKGLIST

# Configuración personallizada de algunos paquetes.
case "$OSDISTRIB" in
        ubuntu|linuxmint)       # Postconfiguación personalizada para Ubuntu.
                # Configuración para DHCP v3.
                DHCPVERSION=$(apt-cache show $(apt-cache pkgnames|egrep "dhcp.?-server$") | \
                              awk '/Version/ {print substr($2,1,1);}' | \
                              sort -n | tail -1)
                if [ $DHCPVERSION = 3 ]; then
                        DEPENDENCIES=( ${DEPENDENCIES[@]/isc-dhcp-server/dhcp3-server} )
                        DHCPSERV=dhcp3-server
                        DHCPCFGDIR=/etc/dhcp3
                fi
                ;;
        centos) # Postconfiguación personalizada para CentOS.
                # Incluir repositorio de paquetes EPEL y paquetes específicos.
                DEPENDENCIES=( ${DEPENDENCIES[@]} epel-release procps )
                ;;
        fedora) # Postconfiguación personalizada para Fedora. 
                # Incluir paquetes específicos.
                DEPENDENCIES=( ${DEPENDENCIES[@]} libstdc++-static.i686 btrfs-progs procps-ng )
                ;;
esac
}


#####################################################################
####### Algunas funciones útiles de propósito general:
#####################################################################

function getDateTime()
{
        date "+%Y%m%d-%H%M%S"
}

# Escribe a fichero y muestra por pantalla
function echoAndLog()
{
        local DATETIME=`getDateTime`
        echo "$1"
        echo "$DATETIME;$SSH_CLIENT;$1" >> $LOG_FILE
}

# Escribe a fichero y muestra mensaje de error
function errorAndLog()
{
        local DATETIME=`getDateTime`
        echo "ERROR: $1"
        echo "$DATETIME;$SSH_CLIENT;ERROR: $1" >> $LOG_FILE
}

# Escribe a fichero y muestra mensaje de aviso
function warningAndLog()
{
        local DATETIME=`getDateTime`
        echo "ERROR: $1"
        echo "$DATETIME;$SSH_CLIENT;Warning: $1" >> $LOG_FILE
}

# Comprueba si el elemento pasado en $2 está en el array $1
function isInArray()
{
        if [ $# -ne 2 ]; then
                errorAndLog "${FUNCNAME}(): invalid number of parameters"
                exit 1
        fi

        local deps
        local is_in_array=1
        local element="$2"

        echoAndLog "${FUNCNAME}(): checking if $2 is in $1"
        eval "deps=( \"\${$1[@]}\" )"

        # Copia local del array del parámetro 1.
        for (( i = 0 ; i < ${#deps[@]} ; i++ )); do
                if [ "${deps[$i]}" = "${element}" ]; then
                        echoAndLog "isInArray(): $element found in array"
                        is_in_array=0
                fi
        done

        if [ $is_in_array -ne 0 ]; then
                echoAndLog "${FUNCNAME}(): $element NOT found in array"
        fi

        return $is_in_array
}


#####################################################################
####### Funciones de manejo de paquetes Debian
#####################################################################

function checkPackage()
{
        package=$1
        if [ -z $package ]; then
                errorAndLog "${FUNCNAME}(): parameter required"
                exit 1
        fi
        echoAndLog "${FUNCNAME}(): checking if package $package exists"
        eval $CHECKPKG
        if [ $? -eq 0 ]; then
                echoAndLog "${FUNCNAME}(): package $package exists"
                return 0
        else
                echoAndLog "${FUNCNAME}(): package $package doesn't exists"
                return 1
        fi
}

# Recibe array con dependencias
# por referencia deja un array con las dependencias no resueltas
# devuelve 1 si hay alguna dependencia no resuelta
function checkDependencies()
{
        if [ $# -ne 2 ]; then
                errorAndLog "${FUNCNAME}(): invalid number of parameters"
                exit 1
        fi

        echoAndLog "${FUNCNAME}(): checking dependences"
        uncompletedeps=0

        # copia local del array del parametro 1
        local deps
        eval "deps=( \"\${$1[@]}\" )"

        declare -a local_notinstalled

        for (( i = 0 ; i < ${#deps[@]} ; i++ ))
        do
                checkPackage ${deps[$i]}
                if [ $? -ne 0 ]; then
                        local_notinstalled[$uncompletedeps]=$package
                        let uncompletedeps=uncompletedeps+1
                fi
        done

        # relleno el array especificado en $2 por referencia
        for (( i = 0 ; i < ${#local_notinstalled[@]} ; i++ ))
        do
                eval "${2}[$i]=${local_notinstalled[$i]}"
        done

        # retorna el numero de paquetes no resueltos
        echoAndLog "${FUNCNAME}(): dependencies uncompleted: $uncompletedeps"
        return $uncompletedeps
}

# Recibe un array con las dependencias y lo instala
function installDependencies()
{
        if [ $# -ne 1 ]; then
                errorAndLog "${FUNCNAME}(): invalid number of parameters"
                exit 1
        fi
        echoAndLog "${FUNCNAME}(): installing uncompleted dependencies"

        # copia local del array del parametro 1
        local deps
        eval "deps=( \"\${$1[@]}\" )"

        local string_deps=""
        for (( i = 0 ; i < ${#deps[@]} ; i++ ))
        do
                string_deps="$string_deps ${deps[$i]}"
        done

        if [ -z "${string_deps}" ]; then
                errorAndLog "${FUNCNAME}(): array of dependeces is empty"
                exit 1
        fi

        OLD_DEBIAN_FRONTEND=$DEBIAN_FRONTEND            # Debian/Ubuntu
        export DEBIAN_FRONTEND=noninteractive

        echoAndLog "${FUNCNAME}(): now $string_deps will be installed"
        eval $INSTALLPKG $string_deps
        if [ $? -ne 0 ]; then
                errorAndLog "${FUNCNAME}(): error installing dependencies"
                return 1
        fi

        DEBIAN_FRONTEND=$OLD_DEBIAN_FRONTEND            # Debian/Ubuntu
        test grep -q "EPEL temporal" /etc/yum.repos.d/epel.repo 2>/dev/null ] || mv -f /etc/yum.repos.d/epel.repo.rpmnew /etc/yum.repos.d/epel.repo 2>/dev/null # CentOS/RedHat EPEL

        echoAndLog "${FUNCNAME}(): dependencies installed"
}

# Hace un backup del fichero pasado por parámetro
# deja un -last y uno para el día
function backupFile()
{
        if [ $# -ne 1 ]; then
                errorAndLog "${FUNCNAME}(): invalid number of parameters"
                exit 1
        fi

        local file="$1"
        local dateymd=`date +%Y%m%d`

        if [ ! -f "$file" ]; then
                warningAndLog "${FUNCNAME}(): file $file doesn't exists"
                return 1
        fi

        echoAndLog "${FUNCNAME}(): making $file backup"

        # realiza una copia de la última configuración como last
        cp -a "$file" "${file}-LAST"

        # si para el día no hay backup lo hace, sino no
        if [ ! -f "${file}-${dateymd}" ]; then
                cp -a "$file" "${file}-${dateymd}"
        fi

        echoAndLog "${FUNCNAME}(): $file backup success"
}

#####################################################################
####### Funciones para el manejo de bases de datos
#####################################################################

# This function set password to root
function mysqlSetRootPassword()
{
        if [ $# -ne 1 ]; then
                errorAndLog "${FUNCNAME}(): invalid number of parameters"
                exit 1
        fi

        local root_mysql="$1"
        echoAndLog "${FUNCNAME}(): setting root password in MySQL server"
        mysqladmin -u root password "$root_mysql"
        if [ $? -ne 0 ]; then
                errorAndLog "${FUNCNAME}(): error while setting root password in MySQL server"
                return 1
        fi
        echoAndLog "${FUNCNAME}(): root password saved!"
        return 0
}

# Si el servicio mysql esta ya instalado cambia la variable de la clave del root por la ya existente
function mysqlGetRootPassword()
{
        local pass_mysql
        local pass_mysql2
        # Comprobar si MySQL está instalado con la clave de root por defecto.
        if mysql -u root -p"$MYSQL_ROOT_PASSWORD" <<<"quit" 2>/dev/null; then
                echoAndLog "${FUNCNAME}(): Using default mysql root password."
        else
                stty -echo
                echo "There is a MySQL service already installed."
                read -p "Enter MySQL root password: " pass_mysql
                echo ""
                read -p "Confrim password:" pass_mysql2
                echo ""
                stty echo
                if [ "$pass_mysql" == "$pass_mysql2" ] ;then
                        MYSQL_ROOT_PASSWORD="$pass_mysql"
                        return 0
                else
                        echo "The keys don't match. Do not configure the server's key,"
                        echo "transactions in the database will give error."
                        return 1
                fi
        fi
}

# comprueba si puede conectar con mysql con el usuario root
function mysqlTestConnection()
{
        if [ $# -ne 1 ]; then
                errorAndLog "${FUNCNAME}(): invalid number of parameters"
                exit 1
        fi

        local root_password="$1"
        echoAndLog "${FUNCNAME}(): checking connection to mysql..."
        # Componer fichero con credenciales de conexión a MySQL.
        touch $TMPMYCNF
        chmod 600 $TMPMYCNF
        cat << EOT > $TMPMYCNF
[client]
user=root
password=$root_password
EOT
        # Borrar el fichero temporal si termina el proceso de instalación.
        trap "rm -f $TMPMYCNF" 0 1 2 3 6 9 15
        # Comprobar conexión a MySQL.
        echo "" | mysql --defaults-extra-file=$TMPMYCNF
        if [ $? -ne 0 ]; then
                errorAndLog "${FUNCNAME}(): connection to mysql failed, check root password and if daemon is running!"
                return 1
        else
                echoAndLog "${FUNCNAME}(): connection success"
                return 0
        fi
}

# comprueba si la base de datos existe
function mysqlDbExists()
{
        if [ $# -ne 1 ]; then
                errorAndLog "${FUNCNAME}(): invalid number of parameters"
                exit 1
        fi

        local database="$1"
        echoAndLog "${FUNCNAME}(): checking if $database exists..."
        echo "show databases" | mysql --defaults-extra-file=$TMPMYCNF | grep "^${database}$"
        if [ $? -ne 0 ]; then
                echoAndLog "${FUNCNAME}():database $database doesn't exists"
                return 1
        else
                echoAndLog "${FUNCNAME}():database $database exists"
                return 0
        fi
}

function mysqlCheckDbIsEmpty()
{
        if [ $# -ne 1 ]; then
                errorAndLog "${FUNCNAME}(): invalid number of parameters"
                exit 1
        fi

        local database="$1"
        echoAndLog "${FUNCNAME}(): checking if $database is empty..."
        num_tablas=`echo "show tables" | mysql --defaults-extra-file=$TMPMYCNF "${database}" | wc -l`
        if [ $? -ne 0 ]; then
                errorAndLog "${FUNCNAME}(): error executing query, check database and root password"
                exit 1
        fi

        if [ $num_tablas -eq 0 ]; then
                echoAndLog "${FUNCNAME}():database $database is empty"
                return 0
        else
                echoAndLog "${FUNCNAME}():database $database has tables"
                return 1
        fi

}


function mysqlImportSqlFileToDb()
{
        if [ $# -ne 2 ]; then
                errorAndLog "${FNCNAME}(): invalid number of parameters"
                exit 1
        fi

        local database="$1"
        local sqlfile="$2"
        local tmpfile=$(mktemp)
        local i=0
        local dev=""
        local status

        if [ ! -f $sqlfile ]; then
                errorAndLog "${FUNCNAME}(): Unable to locate $sqlfile!!"
                return 1
        fi

        echoAndLog "${FUNCNAME}(): importing SQL file to ${database}..."
        chmod 600 $tmpfile
        for dev in ${DEVICE[*]}; do
                if [ "${DEVICE[i]}" == "$DEFAULTDEV" ]; then
                        sed -e "s/SERVERIP/${SERVERIP[i]}/g" \
                            -e "s/DBUSER/$OPENGNSYS_DB_USER/g" \
                            -e "s/DBPASSWORD/$OPENGNSYS_DB_PASSWD/g" \
                                $sqlfile > $tmpfile
                fi
                let i++
        done
        mysql --defaults-extra-file=$TMPMYCNF --default-character-set=utf8 "${database}" < $tmpfile
        status=$?
        rm -f $tmpfile
        if [ $status -ne 0 ]; then
                errorAndLog "${FUNCNAME}(): error while importing $sqlfile in database $database"
                return 1
        fi
        echoAndLog "${FUNCNAME}(): file imported to database $database"
        return 0
}

# Crea la base de datos
function mysqlCreateDb()
{
        if [ $# -ne 1 ]; then
                errorAndLog "${FUNCNAME}(): invalid number of parameters"
                exit 1
        fi

        local database="$1"

        echoAndLog "${FUNCNAME}(): creating database..."
        mysqladmin --defaults-extra-file=$TMPMYCNF create $database
        if [ $? -ne 0 ]; then
                errorAndLog "${FUNCNAME}(): error while creating database $database"
                return 1
        fi
        echoAndLog "${FUNCNAME}(): database $database created"
        return 0
}


function mysqlCheckUserExists()
{
        if [ $# -ne 1 ]; then
                errorAndLog "${FUNCNAME}(): invalid number of parameters"
                exit 1
        fi

        local userdb="$1"

        echoAndLog "${FUNCNAME}(): checking if $userdb exists..."
        echo "select user from user where user='${userdb}'\\G" |mysql --defaults-extra-file=$TMPMYCNF mysql | grep user
        if [ $? -ne 0 ]; then
                echoAndLog "${FUNCNAME}(): user doesn't exists"
                return 1
        else
                echoAndLog "${FUNCNAME}(): user already exists"
                return 0
        fi

}

# Crea un usuario administrativo para la base de datos
function mysqlCreateAdminUserToDb()
{
        if [ $# -ne 3 ]; then
                errorAndLog "${FUNCNAME}(): invalid number of parameters"
                exit 1
        fi

        local database="$1"
        local userdb="$2"
        local passdb="$3"

        echoAndLog "${FUNCNAME}(): creating admin user ${userdb} to database ${database}"

        cat > $WORKDIR/create_${database}.sql <<EOF
GRANT USAGE ON *.* TO '${userdb}'@'localhost' IDENTIFIED BY '${passdb}' ;
GRANT ALL PRIVILEGES ON ${database}.* TO '${userdb}'@'localhost' WITH GRANT OPTION ;
FLUSH PRIVILEGES ;
EOF
        mysql --defaults-extra-file=$TMPMYCNF < $WORKDIR/create_${database}.sql
        if [ $? -ne 0 ]; then
                errorAndLog "${FUNCNAME}(): error while creating user in mysql"
                rm -f $WORKDIR/create_${database}.sql
                return 1
        else
                echoAndLog "${FUNCNAME}(): user created ok"
                rm -f $WORKDIR/create_${database}.sql
                return 0
        fi
}


#####################################################################
####### Funciones para el manejo de Subversion
#####################################################################

function svnExportCode()
{
        if [ $# -ne 1 ]; then
                errorAndLog "${FUNCNAME}(): invalid number of parameters"
                exit 1
        fi

        local url="$1"

        echoAndLog "${FUNCNAME}(): downloading subversion code..."

        svn export --force "$url" opengnsys
        if [ $? -ne 0 ]; then
                errorAndLog "${FUNCNAME}(): error getting OpenGnSys code from $url"
                return 1
        fi
        echoAndLog "${FUNCNAME}(): subversion code downloaded"
        return 0
}


############################################################
###  Detectar red
############################################################

# Comprobar si existe conexión.
function checkNetworkConnection()
{
        echoAndLog "${FUNCNAME}(): Disabling Firewall: $FIREWALLSERV."
        if [ -n "$FIREWALLSERV" ]; then
                service=$FIREWALLSERV
                $STOPSERVICE; $DISABLESERVICE
        fi

        echoAndLog "${FUNCNAME}(): Checking OpenGnSys server conectivity."
        OPENGNSYS_SERVER=${OPENGNSYS_SERVER:-"www.opengnsys.es"}
        if which wget &>/dev/null; then
                wget --spider -q $OPENGNSYS_SERVER
        elif which curl &>/dev/null; then
                curl --connect-timeout 10 -s $OPENGNSYS_SERVER -o /dev/null
        else
                echoAndLog "${FUNCNAME}(): Cannot execute \"wget\" nor \"curl\"."
                return 1
        fi
}

# Obtener los parámetros de red de la interfaz por defecto.
function getNetworkSettings()
{
        # Arrays globales definidas:
        # - DEVICE:     nombres de dispositivos de red activos.
        # - SERVERIP:   IPs locales del servidor.
        # - NETIP:      IPs de redes.
        # - NETMASK:    máscaras de red.
        # - NETBROAD:   IPs de difusión de redes.
        # - ROUTERIP:   IPs de routers.
        # Otras variables globales:
        # - DEFAULTDEV: dispositivo de red por defecto.
        # - DNSIP:      IP del servidor DNS principal.

        local i=0
        local dev=""

        echoAndLog "${FUNCNAME}(): Detecting network parameters."
        DEVICE=( $(ip -o link show up | awk '!/loopback/ {sub(/:.*/,"",$2); print $2}') )
        if [ -z "$DEVICE" ]; then
                errorAndLog "${FUNCNAME}(): Network devices not detected."
                exit 1
        fi
        for dev in ${DEVICE[*]}; do
                SERVERIP[i]=$(ip -o addr show dev $dev | awk '$3~/inet$/ {sub (/\/.*/, ""); print ($4)}')
                if [ -n "${SERVERIP[i]}" ]; then
                        NETMASK[i]=$(LANG=C ifconfig $dev | \
                                                awk '/Mask/ {sub(/.*:/,"",$4); print $4}
                                                     /netmask/ {print $4}')
                        NETBROAD[i]=$(ip -o addr show dev $dev | awk '$3~/inet$/ {print ($6)}')
                        NETIP[i]=$(ip route | awk -v d="$dev" '{ if ($3==d) {sub (/\/.*/,""); print $1} }')
                        ROUTERIP[i]=$(ip route | awk -v d="$dev" '$1~/default/ { if ($5==d) print $3 }')
                        DEFAULTDEV=${DEFAULTDEV:-"$dev"}
                fi
                let i++
        done
        DNSIP=$(awk '/nameserver/ {print $2}' /etc/resolv.conf | head -n1)
        if [ -z "${NETIP[*]}" -o -z "${NETMASK[*]}" ]; then
                errorAndLog "${FUNCNAME}(): Network not detected."
                exit 1
        fi

        # Variables de ejecución de Apache
        # - APACHE_RUN_USER
        # - APACHE_RUN_GROUP
        if [ -f $APACHECFGDIR/envvars ]; then
                source $APACHECFGDIR/envvars
        fi
        APACHE_RUN_USER=${APACHE_RUN_USER:-"$APACHEUSER"}
        APACHE_RUN_GROUP=${APACHE_RUN_GROUP:-"$APACHEGROUP"}

        echoAndLog "${FUNCNAME}(): Default network device: $DEFAULTDEV."
}


############################################################
### Esqueleto para el Servicio pxe y contenedor tftpboot ###
############################################################

function tftpConfigure()
{
        echoAndLog "${FUNCNAME}(): Configuring TFTP service."
        # Habilitar TFTP y reiniciar Inetd.
        if [ -n "$TFTPSERV" ]; then
                if [ -f $INETDCFGDIR/$TFTPSERV ]; then
                        perl -pi -e 's/disable.*/disable = no/' $INETDCFGDIR/$TFTPSERV
                else
                        service=$TFTPSERV
                        $ENABLESERVICE
                fi
        fi
        service=$INETDSERV
        $ENABLESERVICE; $STARTSERVICE

        # preparacion contenedor tftpboot
        cp -a $SYSLINUXDIR $TFTPCFGDIR/syslinux
        cp -a $SYSLINUXDIR/pxelinux.0 $TFTPCFGDIR
        # prepamos el directorio de la configuracion de pxe
        mkdir -p $TFTPCFGDIR/pxelinux.cfg
        cat > $TFTPCFGDIR/pxelinux.cfg/default <<EOF
DEFAULT syslinux/vesamenu.c32 
MENU TITLE Aplicacion GNSYS 
 
LABEL 1 
MENU LABEL 1 
KERNEL syslinux/chain.c32 
APPEND hd0 
 
PROMPT 0 
TIMEOUT 10 
EOF
        # comprobamos el servicio tftp
        sleep 1
        testPxe
}

function testPxe ()
{
        echoAndLog "${FUNCNAME}(): Checking TFTP service... please wait."
        pushd /tmp
        tftp -v 127.0.0.1 -c get pxelinux.0 /tmp/pxelinux.0 && echoAndLog "TFTP service is OK." || errorAndLog "TFTP service is down."
        popd
}


########################################################################
## Configuracion servicio NFS
########################################################################

# Configurar servicio NFS.
# ADVERTENCIA: usa variables globales NETIP y NETMASK!
function nfsConfigure()
{
        echoAndLog "${FUNCNAME}(): Config nfs server."
        backupFile /etc/exports

        nfsAddExport $INSTALL_TARGET/client ${NETIP}/${NETMASK}:ro,no_subtree_check,no_root_squash,sync
        if [ $? -ne 0 ]; then
                errorAndLog "${FUNCNAME}(): error while adding NFS client config"
                return 1
        fi

        nfsAddExport $INSTALL_TARGET/images ${NETIP}/${NETMASK}:rw,no_subtree_check,no_root_squash,sync,crossmnt
        if [ $? -ne 0 ]; then
                errorAndLog "${FUNCNAME}(): error while adding NFS images config"
                return 1
        fi

        nfsAddExport $INSTALL_TARGET/log/clients ${NETIP}/${NETMASK}:rw,no_subtree_check,no_root_squash,sync
        if [ $? -ne 0 ]; then
                errorAndLog "${FUNCNAME}(): error while adding logging client config"
                return 1
        fi

        nfsAddExport $INSTALL_TARGET/tftpboot ${NETIP}/${NETMASK}:ro,no_subtree_check,no_root_squash,sync
        if [ $? -ne 0 ]; then
                errorAndLog "${FUNCNAME}(): error while adding second filesystem for the PXE ogclient"
                return 1
        fi

        /etc/init.d/nfs-kernel-server restart
        exportfs -va
        if [ $? -ne 0 ]; then
                errorAndLog "${FUNCNAME}(): error while configure exports"
                return 1
        fi

        echoAndLog "${FUNCNAME}(): Added NFS configuration to file \"/etc/exports\"."
        return 0
}


# Añadir entrada en fichero de configuración del servidor NFS.
# Ejemplos:
#nfsAddExport /opt/opengnsys 192.168.0.0/255.255.255.0:ro,no_subtree_check,no_root_squash,sync
#nfsAddExport /opt/opengnsys 192.168.0.0/255.255.255.0
#nfsAddExport /opt/opengnsys 80.20.2.1:ro 192.123.32.2:rw
function nfsAddExport()
{
        if [ $# -lt 2 ]; then
                errorAndLog "${FUNCNAME}(): invalid number of parameters"
                exit 1
        fi
        if [ ! -f /etc/exports ]; then
                errorAndLog "${FUNCNAME}(): /etc/exports don't exists"
                return 1
        fi

        local export="$1"
        local contador=0
        local cadenaexport

        grep "^$export" /etc/exports > /dev/null
        if [ $? -eq 0 ]; then
                echoAndLog "${FUNCNAME}(): $export exists in /etc/exports, omiting"
                return 0
        fi

        cadenaexport="${export}"
        for parametro in $*; do
                if [ $contador -gt 0 ]; then
                        host=`echo $parametro | awk -F: '{print $1}'`
                        options=`echo $parametro | awk -F: '{print $2}'`
                        if [ "${host}" == "" ]; then
                                errorAndLog "${FUNCNAME}(): host can't be empty"
                                return 1
                        fi
                        cadenaexport="${cadenaexport}\t${host}"

                        if [ "${options}" != "" ]; then
                                cadenaexport="${cadenaexport}(${options})"
                        fi
                fi
                let contador=contador+1
        done

        echo -en "$cadenaexport\n" >> /etc/exports

        echoAndLog "${FUNCNAME}(): add $export to /etc/exports"
        return 0
}


########################################################################
## Configuracion servicio Samba
########################################################################

# Configurar servicios Samba.
function smbConfigure()
{
        echoAndLog "${FUNCNAME}(): Configuring Samba service."

        backupFile $SAMBACFGDIR/smb.conf
        
        # Copiar plantailla de recursos para OpenGnSys
        sed -e "s/OPENGNSYSDIR/${INSTALL_TARGET//\//\\/}/g" \
                $WORKDIR/opengnsys/server/etc/smb-og.conf.tmpl > $SAMBACFGDIR/smb-og.conf
        # Configurar y recargar Samba"
        perl -pi -e "s/WORKGROUP/OPENGNSYS/; s/server string \=.*/server string \= OpenGnSys Samba Server/" $SAMBACFGDIR/smb.conf
        if ! grep -q "smb-og" $SAMBACFGDIR/smb.conf; then
                echo "include = $SAMBACFGDIR/smb-og.conf" >> $SAMBACFGDIR/smb.conf
        fi
        service=$SAMBASERV
        $ENABLESERVICE; $STARTSERVICE
        if [ $? -ne 0 ]; then
                errorAndLog "${FUNCNAME}(): error while configure Samba"
                return 1
        fi
        # Crear clave para usuario de acceso a los recursos.
        echo -ne "$OPENGNSYS_CLIENT_PASSWD\n$OPENGNSYS_CLIENT_PASSWD\n" | smbpasswd -a -s $OPENGNSYS_CLIENT_USER

        echoAndLog "${FUNCNAME}(): Added Samba configuration."
        return 0
}


########################################################################
## Configuracion servicio Rsync
########################################################################

# Configurar servicio Rsync.
function rsyncConfigure()
{
        echoAndLog "${FUNCNAME}(): Configuring Rsync service."

        backupFile $RSYNCCFGDIR/rsyncd.conf

        # Configurar acceso a Rsync.
        sed -e "s/CLIENTUSER/$OPENGNSYS_CLIENT_USER/g" \
                $WORKDIR/opengnsys/repoman/etc/rsyncd.conf.tmpl > $RSYNCCFGDIR/rsyncd.conf
        sed -e "s/CLIENTUSER/$OPENGNSYS_CLIENT_USER/g" \
            -e "s/CLIENTPASSWORD/$OPENGNSYS_CLIENT_PASSWD/g" \
                $WORKDIR/opengnsys/repoman/etc/rsyncd.secrets.tmpl > $RSYNCCFGDIR/rsyncd.secrets
        chown root.root $RSYNCCFGDIR/rsyncd.secrets
        chmod 600 $RSYNCCFGDIR/rsyncd.secrets

        # Habilitar Rsync y reiniciar Inetd.
        if [ -n "$RSYNCSERV" ]; then
                if [ -f /etc/default/rsync ]; then
                        perl -pi -e 's/RSYNC_ENABLE=.*/RSYNC_ENABLE=inetd/' /etc/default/rsync
                fi
                if [ -f $INETDCFGDIR/rsync ]; then
                        perl -pi -e 's/disable.*/disable = no/' $INETDCFGDIR/rsync
                else
                        cat << EOT > $INETDCFGDIR/rsync
service rsync
{
        disable = no
        socket_type = stream
        wait = no
        user = root
        server = $(which rsync)
        server_args = --daemon
        log_on_failure += USERID
        flags = IPv6
}
EOT
                fi
                service=$RSYNCSERV $ENABLESERVICE
                service=$INETDSERV $STARTSERVICE
        fi

        echoAndLog "${FUNCNAME}(): Added Rsync configuration."
        return 0
}

        
########################################################################
## Configuracion servicio DHCP
########################################################################

# Configurar servicios DHCP.
function dhcpConfigure()
{
        echoAndLog "${FUNCNAME}(): Sample DHCP configuration."

        local errcode=0
        local i=0
        local dev=""

        backupFile $DHCPCFGDIR/dhcpd.conf
        for dev in ${DEVICE[*]}; do
                if [ -n "${SERVERIP[i]}" ]; then
                        backupFile $DHCPCFGDIR/dhcpd-$dev.conf
                        sed -e "s/SERVERIP/${SERVERIP[i]}/g" \
                            -e "s/NETIP/${NETIP[i]}/g" \
                            -e "s/NETMASK/${NETMASK[i]}/g" \
                            -e "s/NETBROAD/${NETBROAD[i]}/g" \
                            -e "s/ROUTERIP/${ROUTERIP[i]}/g" \
                            -e "s/DNSIP/$DNSIP/g" \
                            $WORKDIR/opengnsys/server/etc/dhcpd.conf.tmpl > $DHCPCFGDIR/dhcpd-$dev.conf || errcode=1
                fi
                let i++
        done
        if [ $errcode -ne 0 ]; then
                errorAndLog "${FUNCNAME}(): error while configuring DHCP server"
                return 1
        fi
        ln -f $DHCPCFGDIR/dhcpd-$DEFAULTDEV.conf $DHCPCFGDIR/dhcpd.conf
        service=$DHCPSERV
        $ENABLESERVICE; $STARTSERVICE
        echoAndLog "${FUNCNAME}(): Sample DHCP configured in \"$DHCPCFGDIR\"."
        return 0
}


#####################################################################
####### Funciones específicas de la instalación de Opengnsys
#####################################################################

# Copiar ficheros del OpenGnSys Web Console.
function installWebFiles()
{
        local COMPATDIR f

        echoAndLog "${FUNCNAME}(): Installing web files..."
        # Copiar ficheros.
        cp -a $WORKDIR/opengnsys/admin/WebConsole/* $INSTALL_TARGET/www   #*/ comentario para Doxygen.
        if [ $? != 0 ]; then
                errorAndLog "${FUNCNAME}(): Error copying web files."
                exit 1
        fi
        find $INSTALL_TARGET/www -name .svn -type d -exec rm -fr {} \; 2>/dev/null
        # Descomprimir XAJAX.
        unzip -o $WORKDIR/opengnsys/admin/xajax_0.5_standard.zip -d $INSTALL_TARGET/www/xajax
        # Compatibilidad con dispositivos móviles.
        COMPATDIR="$INSTALL_TARGET/www/principal"
        for f in acciones administracion aula aulas hardwares imagenes menus repositorios softwares; do
                sed 's/clickcontextualnodo/clicksupnodo/g' $COMPATDIR/$f.php > $COMPATDIR/$f.device.php
        done
        cp -a $COMPATDIR/imagenes.device.php $COMPATDIR/imagenes.device4.php
        # Cambiar permisos para ficheros especiales.
        chown -R $APACHE_RUN_USER:$APACHE_RUN_GROUP $INSTALL_TARGET/www/images/{fotos,iconos}
        chown -R $APACHE_RUN_USER:$APACHE_RUN_GROUP $INSTALL_TARGET/www/tmp/

        echoAndLog "${FUNCNAME}(): Web files installed successfully."
}

# Configuración específica de Apache.
function installWebConsoleApacheConf()
{
        if [ $# -ne 2 ]; then
                errorAndLog "${FUNCNAME}(): invalid number of parameters"
                exit 1
        fi

        local path_opengnsys_base="$1"
        local path_apache2_confd="$2"
        local CONSOLEDIR=${path_opengnsys_base}/www

        if [ ! -d $path_apache2_confd ]; then
                errorAndLog "${FUNCNAME}(): path to apache2 conf.d can not found, verify your server installation"
                return 1
        fi

        mkdir -p $path_apache2_confd/{sites-available,sites-enabled}

        echoAndLog "${FUNCNAME}(): creating apache2 config file.."

        # Activar HTTPS.
        $APACHESSLMOD
        $APACHEENABLESSL
        $APACHEMAKECERT

        # Genera configuración de consola web a partir del fichero plantilla.
        if [ -n "$(apachectl -v | grep "2\.[0-2]")" ]; then
                # Configuración para versiones anteriores de Apache.
                sed -e "s/CONSOLEDIR/${CONSOLEDIR//\//\\/}/g" \
                        $WORKDIR/opengnsys/server/etc/apache-prev2.4.conf.tmpl > $path_apache2_confd/$APACHESITESDIR/${APACHEOGSITE}
        else
                # Configuración específica a partir de Apache 2.4
                sed -e "s/CONSOLEDIR/${CONSOLEDIR//\//\\/}/g" \
                        $WORKDIR/opengnsys/server/etc/apache.conf.tmpl > $path_apache2_confd/$APACHESITESDIR/${APACHEOGSITE}.conf
        fi
        $APACHEENABLEOG
        if [ $? -ne 0 ]; then
                errorAndLog "${FUNCNAME}(): config file can't be linked to apache conf, verify your server installation"
                return 1
        else
                echoAndLog "${FUNCNAME}(): config file created and linked, restarting apache daemon"
                service=$APACHESERV
                $ENABLESERVICE; $STARTSERVICE
                return 0
        fi
}


# Crear documentación Doxygen para la consola web.
function makeDoxygenFiles()
{
        echoAndLog "${FUNCNAME}(): Making Doxygen web files..."
        $WORKDIR/opengnsys/installer/ogGenerateDoc.sh \
                        $WORKDIR/opengnsys/client/engine $INSTALL_TARGET/www
        if [ ! -d "$INSTALL_TARGET/www/html" ]; then
                errorAndLog "${FUNCNAME}(): unable to create Doxygen web files."
                return 1
        fi
        mv "$INSTALL_TARGET/www/html" "$INSTALL_TARGET/www/api"
        chown -R $APACHE_RUN_USER:$APACHE_RUN_GROUP $INSTALL_TARGET/www/api
        echoAndLog "${FUNCNAME}(): Doxygen web files created successfully."
}


# Crea la estructura base de la instalación de opengnsys
function createDirs()
{
        if [ $# -ne 1 ]; then
                errorAndLog "${FUNCNAME}(): invalid number of parameters"
                exit 1
        fi

        local path_opengnsys_base="$1"

        # Crear estructura de directorios.
        echoAndLog "${FUNCNAME}(): creating directory paths in $path_opengnsys_base"
        mkdir -p $path_opengnsys_base
        mkdir -p $path_opengnsys_base/bin
        mkdir -p $path_opengnsys_base/client
        mkdir -p $path_opengnsys_base/doc
        mkdir -p $path_opengnsys_base/etc
        mkdir -p $path_opengnsys_base/lib
        mkdir -p $path_opengnsys_base/log/clients
        ln -fs $path_opengnsys_base/log /var/log/opengnsys
        mkdir -p $path_opengnsys_base/sbin
        mkdir -p $path_opengnsys_base/www
        mkdir -p $path_opengnsys_base/images
        mkdir -p $TFTPCFGDIR
        ln -fs $TFTPCFGDIR $path_opengnsys_base/tftpboot
        mkdir -p $path_opengnsys_base/tftpboot/pxelinux.cfg
        mkdir -p $path_opengnsys_base/tftpboot/menu.lst
        if [ $? -ne 0 ]; then
                errorAndLog "${FUNCNAME}(): error while creating dirs. Do you have write permissions?"
                return 1
        fi

        # Crear usuario ficticio.
        if id -u $OPENGNSYS_CLIENT_USER &>/dev/null; then 
                echoAndLog "${FUNCNAME}(): user \"$OPENGNSYS_CLIENT_USER\" is already created"
        else
                echoAndLog "${FUNCNAME}(): creating OpenGnSys user"
                useradd $OPENGNSYS_CLIENT_USER 2>/dev/null
                if [ $? -ne 0 ]; then
                        errorAndLog "${FUNCNAME}(): error creating OpenGnSys user"
                        return 1
                fi
        fi

        # Establecer los permisos básicos.
        echoAndLog "${FUNCNAME}(): setting directory permissions"
        chmod -R 775 $path_opengnsys_base/{log/clients,images}
        chown -R :$OPENGNSYS_CLIENT_USER $path_opengnsys_base/{log/clients,images}
        if [ $? -ne 0 ]; then
                errorAndLog "${FUNCNAME}(): error while setting permissions"
                return 1
        fi

        # Mover el fichero de registro de instalación al directorio de logs.
        echoAndLog "${FUNCNAME}(): moving installation log file"
        mv $LOG_FILE $OGLOGFILE && LOG_FILE=$OGLOGFILE
        chmod 600 $LOG_FILE

        echoAndLog "${FUNCNAME}(): directory paths created"
        return 0
}

# Copia ficheros de configuración y ejecutables genéricos del servidor.
function copyServerFiles ()
{
        if [ $# -ne 1 ]; then
                errorAndLog "${FUNCNAME}(): invalid number of parameters"
                exit 1
        fi

        local path_opengnsys_base="$1"

        local SOURCES=( server/tftpboot \
                        server/bin \
                        repoman/bin \
                        admin/Sources/Services/ogAdmServerAux
                        admin/Sources/Services/ogAdmRepoAux
                        installer/opengnsys_uninstall.sh \
                        installer/opengnsys_update.sh \
                        doc )
        local TARGETS=( tftpboot \
                        bin \
                        bin \
                        sbin \
                        sbin \
                        lib \
                        lib \
                        doc )

        if [ ${#SOURCES[@]} != ${#TARGETS[@]} ]; then
                errorAndLog "${FUNCNAME}(): inconsistent number of array items"
                exit 1
        fi

        echoAndLog "${FUNCNAME}(): copying files to server directories"

        pushd $WORKDIR/opengnsys
        local i
        for (( i = 0; i < ${#SOURCES[@]}; i++ )); do
                if [ -f "${SOURCES[$i]}" ]; then
                        echoAndLog "Copying ${SOURCES[$i]} to $path_opengnsys_base/${TARGETS[$i]}"
                        cp -a "${SOURCES[$i]}" "${path_opengnsys_base}/${TARGETS[$i]}"
                elif [ -d "${SOURCES[$i]}" ]; then
                        echoAndLog "Copying content of ${SOURCES[$i]} to $path_opengnsys_base/${TARGETS[$i]}"
                        cp -a "${SOURCES[$i]}"/* "${path_opengnsys_base}/${TARGETS[$i]}"
        else
                        warningAndLog "Unable to copy ${SOURCES[$i]} to $path_opengnsys_base/${TARGETS[$i]}"
                fi
        done
        popd
}

####################################################################
### Funciones de compilación de código fuente de servicios
####################################################################

# Compilar los servicios de OpenGnSys
function servicesCompilation ()
{
        local hayErrores=0

        # Compilar OpenGnSys Server
        echoAndLog "${FUNCNAME}(): Compiling OpenGnSys Admin Server"
        pushd $WORKDIR/opengnsys/admin/Sources/Services/ogAdmServer
        make && mv ogAdmServer $INSTALL_TARGET/sbin
        if [ $? -ne 0 ]; then
                echoAndLog "${FUNCNAME}(): error while compiling OpenGnSys Admin Server"
                hayErrores=1
        fi
        popd
        # Compilar OpenGnSys Repository Manager
        echoAndLog "${FUNCNAME}(): Compiling OpenGnSys Repository Manager"
        pushd $WORKDIR/opengnsys/admin/Sources/Services/ogAdmRepo
        make && mv ogAdmRepo $INSTALL_TARGET/sbin
        if [ $? -ne 0 ]; then
                echoAndLog "${FUNCNAME}(): error while compiling OpenGnSys Repository Manager"
                hayErrores=1
        fi
        popd
        # Compilar OpenGnSys Agent
        echoAndLog "${FUNCNAME}(): Compiling OpenGnSys Agent"
        pushd $WORKDIR/opengnsys/admin/Sources/Services/ogAdmAgent
        make && mv ogAdmAgent $INSTALL_TARGET/sbin
        if [ $? -ne 0 ]; then
                echoAndLog "${FUNCNAME}(): error while compiling OpenGnSys Agent"
                hayErrores=1
        fi
        popd    
        # Compilar OpenGnSys Client
        echoAndLog "${FUNCNAME}(): Compiling OpenGnSys Admin Client"
        pushd $WORKDIR/opengnsys/admin/Sources/Clients/ogAdmClient
        make && mv ogAdmClient ../../../../client/shared/bin
        if [ $? -ne 0 ]; then
                echoAndLog "${FUNCNAME}(): error while compiling OpenGnSys Admin Client"
                hayErrores=1
        fi
        popd

        return $hayErrores
}

####################################################################
### Funciones de copia de la Interface de administración
####################################################################

# Copiar carpeta de Interface
function copyInterfaceAdm ()
{
        local hayErrores=0
        
        # Crear carpeta y copiar Interface
        echoAndLog "${FUNCNAME}(): Copying Administration Interface Folder"
        cp -ar $WORKDIR/opengnsys/admin/Interface $INSTALL_TARGET/client/interfaceAdm
        if [ $? -ne 0 ]; then
                echoAndLog "${FUNCNAME}(): error while copying Administration Interface Folder"
                hayErrores=1
        fi
        chown $OPENGNSYS_CLIENT_USER:$OPENGNSYS_CLIENT_USER $INSTALL_TARGET/client/interfaceAdm/CambiarAcceso
        chmod 700 $INSTALL_TARGET/client/interfaceAdm/CambiarAcceso

        return $hayErrores
}

####################################################################
### Funciones instalacion cliente opengnsys
####################################################################

function copyClientFiles()
{
        local errstatus=0

        echoAndLog "${FUNCNAME}(): Copying OpenGnSys Client files."
        cp -a $WORKDIR/opengnsys/client/shared/* $INSTALL_TARGET/client
        if [ $? -ne 0 ]; then
                errorAndLog "${FUNCNAME}(): error while copying client estructure"
                errstatus=1
        fi
        find $INSTALL_TARGET/client -name .svn -type d -exec rm -fr {} \; 2>/dev/null
        
        echoAndLog "${FUNCNAME}(): Copying OpenGnSys Cloning Engine files."
        mkdir -p $INSTALL_TARGET/client/lib/engine/bin
        cp -a $WORKDIR/opengnsys/client/engine/*.lib* $INSTALL_TARGET/client/lib/engine/bin
        if [ $? -ne 0 ]; then
                errorAndLog "${FUNCNAME}(): error while copying engine files"
                errstatus=1
        fi
        
        if [ $errstatus -eq 0 ]; then
                echoAndLog "${FUNCNAME}(): client copy files success."
        else
                errorAndLog "${FUNCNAME}(): client copy files with errors"
        fi

        return $errstatus
}


# Crear cliente OpenGnSys 1.0.2 y posteriores.
function clientCreate()
{
        local DOWNLOADURL="http://$OPENGNSYS_SERVER/downloads"
        local FILENAME=ogLive-precise-3.2.0-23-generic-r3257.iso        # 1.0.4-rc2
        #local FILENAME=ogLive-raring-3.8.0-22-generic-r3836.iso        # 1.0.5-rc3
        local TARGETFILE=$INSTALL_TARGET/lib/$FILENAME
        local TMPDIR=/tmp/${FILENAME%.iso}
 
        # Descargar cliente, si es necesario.
        if [ -s $PROGRAMDIR/$FILENAME ]; then
                echoAndLog "${FUNCNAME}(): Moving $PROGRAMDIR/$FILENAME file to $(dirname $TARGETFILE)"
                mv $PROGRAMDIR/$FILENAME $TARGETFILE
        else
                echoAndLog "${FUNCNAME}(): Loading Client"
                wget $DOWNLOADURL/$FILENAME -O $TARGETFILE
        fi
        if [ ! -s $TARGETFILE ]; then
                errorAndLog "${FUNCNAME}(): Error loading OpenGnSys Client"
                return 1
        fi
        # Montar imagen, copiar cliente ogclient y desmontar.
        echoAndLog "${FUNCNAME}(): Copying Client files"
        mkdir -p $TMPDIR
        mount -o loop,ro $TARGETFILE $TMPDIR
        cp -av $TMPDIR/ogclient $INSTALL_TARGET/tftpboot
        umount $TMPDIR
        rmdir $TMPDIR
        # Asignar la clave cliente para acceso a Samba.
        echoAndLog "${FUNCNAME}(): Set client access key"
        echo -ne "$OPENGNSYS_CLIENT_PASSWD\n$OPENGNSYS_CLIENT_PASSWD\n" | \
                        $INSTALL_TARGET/bin/setsmbpass

        # Establecer los permisos.
        find -L $INSTALL_TARGET/tftpboot -type d -exec chmod 755 {} \;
        find -L $INSTALL_TARGET/tftpboot -type f -exec chmod 644 {} \;
        chown -R :$OPENGNSYS_CLIENT_USER $INSTALL_TARGET/tftpboot/ogclient
        chown -R $APACHE_RUN_USER:$APACHE_RUN_GROUP $INSTALL_TARGET/tftpboot/{menu.lst,pxelinux.cfg}

        # Ofrecer md5 del kernel y vmlinuz para ogupdateinitrd en cache
        cp -av $INSTALL_TARGET/tftpboot/ogclient/ogvmlinuz* $INSTALL_TARGET/tftpboot
        cp -av $INSTALL_TARGET/tftpboot/ogclient/oginitrd.img* $INSTALL_TARGET/tftpboot

        echoAndLog "${FUNCNAME}(): Client generation success"
}


# Configuración básica de servicios de OpenGnSys
function openGnsysConfigure()
{
        local i=0
        local dev=""
        local CONSOLEURL

        echoAndLog "${FUNCNAME}(): Copying init files."
        cp -a $WORKDIR/opengnsys/admin/Sources/Services/opengnsys.init /etc/init.d/opengnsys
        cp -a $WORKDIR/opengnsys/admin/Sources/Services/opengnsys.default /etc/default/opengnsys
        echoAndLog "${FUNCNAME}(): Creating cron files."
        echo "* * * * *   root   [ -x $INSTALL_TARGET/bin/opengnsys.cron ] && $INSTALL_TARGET/bin/opengnsys.cron" > /etc/cron.d/opengnsys
        echo "* * * * *   root   [ -x $INSTALL_TARGET/bin/torrent-creator ] && $INSTALL_TARGET/bin/torrent-creator" > /etc/cron.d/torrentcreator
        echo "5 * * * *   root   [ -x $INSTALL_TARGET/bin/torrent-tracker ] && $INSTALL_TARGET/bin/torrent-tracker" > /etc/cron.d/torrenttracker
        echo "* * * * *   root   [ -x $INSTALL_TARGET/bin/deletepreimage ] && $INSTALL_TARGET/bin/deletepreimage" > /etc/cron.d/imagedelete

        echoAndLog "${FUNCNAME}(): Creating logrotate configuration file."
        sed -e "s/OPENGNSYSDIR/${INSTALL_TARGET//\//\\/}/g" \
                $WORKDIR/opengnsys/server/etc/logrotate.tmpl > /etc/logrotate.d/opengnsys

        echoAndLog "${FUNCNAME}(): Creating OpenGnSys config files."
        for dev in ${DEVICE[*]}; do
                if [ -n "${SERVERIP[i]}" ]; then
                        sed -e "s/SERVERIP/${SERVERIP[i]}/g" \
                            -e "s/DBUSER/$OPENGNSYS_DB_USER/g" \
                            -e "s/DBPASSWORD/$OPENGNSYS_DB_PASSWD/g" \
                            -e "s/DATABASE/$OPENGNSYS_DATABASE/g" \
                                $WORKDIR/opengnsys/admin/Sources/Services/ogAdmServer/ogAdmServer.cfg > $INSTALL_TARGET/etc/ogAdmServer-$dev.cfg
                        sed -e "s/SERVERIP/${SERVERIP[i]}/g" \
                                $WORKDIR/opengnsys/admin/Sources/Services/ogAdmRepo/ogAdmRepo.cfg > $INSTALL_TARGET/etc/ogAdmRepo-$dev.cfg
                        sed -e "s/SERVERIP/${SERVERIP[i]}/g" \
                            -e "s/DBUSER/$OPENGNSYS_DB_USER/g" \
                            -e "s/DBPASSWORD/$OPENGNSYS_DB_PASSWD/g" \
                            -e "s/DATABASE/$OPENGNSYS_DATABASE/g" \
                                $WORKDIR/opengnsys/admin/Sources/Services/ogAdmAgent/ogAdmAgent.cfg > $INSTALL_TARGET/etc/ogAdmAgent-$dev.cfg
                        CONSOLEURL="http://${SERVERIP[i]}/opengnsys"
                        sed -e "s/SERVERIP/${SERVERIP[i]}/g" \
                            -e "s/DBUSER/$OPENGNSYS_DB_USER/g" \
                            -e "s/DBPASSWORD/$OPENGNSYS_DB_PASSWD/g" \
                            -e "s/DATABASE/$OPENGNSYS_DATABASE/g" \
                            -e "s/OPENGNSYSURL/${CONSOLEURL//\//\\/}/g" \
                                $INSTALL_TARGET/www/controlacceso.php > $INSTALL_TARGET/www/controlacceso-$dev.php
                        sed -e "s/SERVERIP/${SERVERIP[i]}/g" \
                            -e "s/OPENGNSYSURL/${CONSOLEURL//\//\\/}/g" \
                                $WORKDIR/opengnsys/admin/Sources/Clients/ogAdmClient/ogAdmClient.cfg > $INSTALL_TARGET/client/etc/ogAdmClient-$dev.cfg
                        if [ "$dev" == "$DEFAULTDEV" ]; then
                                OPENGNSYS_CONSOLEURL="${CONSOLEURL/http:/https:}"
                        fi
                fi
                let i++
        done
        ln -f $INSTALL_TARGET/etc/ogAdmServer-$DEFAULTDEV.cfg $INSTALL_TARGET/etc/ogAdmServer.cfg
        ln -f $INSTALL_TARGET/etc/ogAdmRepo-$DEFAULTDEV.cfg $INSTALL_TARGET/etc/ogAdmRepo.cfg
        ln -f $INSTALL_TARGET/etc/ogAdmAgent-$DEFAULTDEV.cfg $INSTALL_TARGET/etc/ogAdmAgent.cfg
        ln -f $INSTALL_TARGET/client/etc/ogAdmClient-$DEFAULTDEV.cfg $INSTALL_TARGET/client/etc/ogAdmClient.cfg
        ln -f $INSTALL_TARGET/www/controlacceso-$DEFAULTDEV.php $INSTALL_TARGET/www/controlacceso.php
        chown root:root $INSTALL_TARGET/etc/{ogAdmServer,ogAdmAgent}*.cfg
        chmod 600 $INSTALL_TARGET/etc/{ogAdmServer,ogAdmAgent}*.cfg
        chown $APACHE_RUN_USER:$APACHE_RUN_GROUP $INSTALL_TARGET/www/controlacceso*.php
        chmod 600 $INSTALL_TARGET/www/controlacceso*.php

        # Revisar permisos generales.
        if [ -x $INSTALL_TARGET/bin/checkperms ]; then
                echoAndLog "${FUNCNAME}(): Checking permissions."
                OPENGNSYS_DIR="$INSTALL_TARGET" OPENGNSYS_USER="$OPENGNSYS_CLIENT_USER" APACHE_USER="$APACHE_RUN_USER" APACHE_GROUP="$APACHE_RUN_GROUP" $INSTALL_TARGET/bin/checkperms
        fi

        echoAndLog "${FUNCNAME}(): Starting OpenGnSys services."
        service="opengnsys"
        $ENABLESERVICE; $STARTSERVICE
}


#####################################################################
#######  Función de resumen informativo de la instalación
#####################################################################

function installationSummary()
{
        # Crear fichero de versión y revisión, si no existe.
        local VERSIONFILE="$INSTALL_TARGET/doc/VERSION.txt"
        local REVISION=$(LANG=C svn info $SVN_URL|awk '/Rev:/ {print "r"$4}')
        [ -f $VERSIONFILE ] || echo "OpenGnSys" >$VERSIONFILE
        perl -pi -e "s/($| r[0-9]*)/ $REVISION/" $VERSIONFILE

        # Mostrar información.
        echo
        echoAndLog "OpenGnSys Installation Summary"
        echo       "=============================="
        echoAndLog "Project version:                  $(cat $VERSIONFILE 2>/dev/null)"
        echoAndLog "Installation directory:           $INSTALL_TARGET"
        echoAndLog "Installation log file:            $LOG_FILE"
        echoAndLog "Repository directory:             $INSTALL_TARGET/images"
        echoAndLog "DHCP configuration directory:     $DHCPCFGDIR"
        echoAndLog "TFTP configuration directory:     $TFTPCFGDIR"
        echoAndLog "Samba configuration directory:    $SAMBACFGDIR"
        echoAndLog "Web Console URL:                  $OPENGNSYS_CONSOLEURL"
        echoAndLog "Web Console access data:          specified in installer script"
        echo
        echoAndLog "Post-Installation Instructions:"
        echo       "==============================="
        echoAndLog "Firewall service has been disabled and SELinux mode set to"
        echoAndLog "   permissive during OpenGnSys installation. Please check"
        echoAndLog "   $FIREWALLSERV and SELinux configuration, if needed."
        echoAndLog "Review or edit all configuration files."
        echoAndLog "Insert DHCP configuration data and restart service."
        echoAndLog "Optional: Log-in as Web Console admin user."
        echoAndLog " - Review default Organization data and assign access to users."
        echoAndLog "Log-in as Web Console organization user."
        echoAndLog " - Insert OpenGnSys data (labs, computers, menus, etc)."
echo
}



#####################################################################
####### Proceso de instalación de OpenGnSys
#####################################################################

echoAndLog "OpenGnSys installation begins at $(date)"
pushd $WORKDIR

# Detectar datos iniciales de auto-configuración del instalador.
autoConfigure

# Detectar parámetros de red y comprobar si hay conexión.
getNetworkSettings
if [ $? -ne 0 ]; then
        errorAndLog "Error reading default network settings."
        exit 1
fi
checkNetworkConnection
if [ $? -ne 0 ]; then
        errorAndLog "Error connecting to server. Causes:"
        errorAndLog " - Network is unreachable, review devices parameters."
        errorAndLog " - You are inside a private network, configure the proxy service."
        errorAndLog " - Server is temporally down, try agian later."
        exit 1
fi

# Detener servicios de OpenGnSys, si están activos previamente.
[ -f /etc/init.d/opengnsys ] && /etc/init.d/opengnsys stop

# Actualizar repositorios
updatePackageList

# Instalación de dependencias (paquetes de sistema operativo).
declare -a notinstalled
checkDependencies DEPENDENCIES notinstalled
if [ $? -ne 0 ]; then
        installDependencies notinstalled
        if [ $? -ne 0 ]; then
                echoAndLog "Error while installing some dependeces, please verify your server installation before continue"
                exit 1
        fi
fi
if [ -n "$INSTALLEXTRADEPS" ]; then
        echoAndLog "Installing extra dependencies"
        for (( i=0; i<${#INSTALLEXTRADEPS[*]}; i++ )); do
                eval ${INSTALLEXTRADEPS[i]}
        done
fi      

# Detectar datos de auto-configuración después de instalar paquetes.
autoConfigurePost

# Arbol de directorios de OpenGnSys.
createDirs ${INSTALL_TARGET}
if [ $? -ne 0 ]; then
        errorAndLog "Error while creating directory paths!"
        exit 1
fi

# Si es necesario, descarga el repositorio de código en directorio temporal
if [ $USESVN -eq 1 ]; then
        svnExportCode $SVN_URL
        if [ $? -ne 0 ]; then
                errorAndLog "Error while getting code from svn"
                exit 1
        fi
else
        ln -fs "$(dirname $PROGRAMDIR)" opengnsys
fi

# Compilar código fuente de los servicios de OpenGnSys.
servicesCompilation
if [ $? -ne 0 ]; then
        errorAndLog "Error while compiling OpenGnsys services"
        exit 1
fi

# Copiar carpeta Interface entre administración y motor de clonación.
copyInterfaceAdm
if [ $? -ne 0 ]; then
        errorAndLog "Error while copying Administration Interface"
        exit 1
fi

# Configuración de TFTP.
tftpConfigure

# Configuración de Samba.
smbConfigure
if [ $? -ne 0 ]; then
        errorAndLog "Error while configuring Samba server!"
        exit 1
fi

# Configuración de Rsync.
rsyncConfigure

# Configuración ejemplo DHCP.
dhcpConfigure
if [ $? -ne 0 ]; then
        errorAndLog "Error while copying your dhcp server files!"
        exit 1
fi

# Copiar ficheros de servicios OpenGnSys Server.
copyServerFiles ${INSTALL_TARGET}
if [ $? -ne 0 ]; then
        errorAndLog "Error while copying the server files!"
        exit 1
fi

# Instalar base de datos de OpenGnSys Admin.
isInArray notinstalled "mysql-server"
if [ $? -eq 0 ]; then
        # Habilitar gestor de base de datos (MySQL, si falla, MariaDB).
        service=$MYSQLSERV
        $ENABLESERVICE
        if [ $? != 0 ]; then
                service=$MARIADBSERV
                $ENABLESERVICE
        fi
        # Activar gestor de base de datos.
        $STARTSERVICE
        # Asignar clave del usuario "root".
        mysqlSetRootPassword "${MYSQL_ROOT_PASSWORD}"
else
        # Si ya está instalado el gestor de bases de datos, obtener clave de "root", 
        mysqlGetRootPassword
fi

mysqlTestConnection "${MYSQL_ROOT_PASSWORD}"
if [ $? -ne 0 ]; then
        errorAndLog "Error while connection to mysql"
        exit 1
fi
mysqlDbExists ${OPENGNSYS_DATABASE}
if [ $? -ne 0 ]; then
        echoAndLog "Creating Web Console database"
        mysqlCreateDb ${OPENGNSYS_DATABASE}
        if [ $? -ne 0 ]; then
                errorAndLog "Error while creating Web Console database"
                exit 1
        fi
else
        echoAndLog "Web Console database exists, ommiting creation"
fi

mysqlCheckUserExists ${OPENGNSYS_DB_USER}
if [ $? -ne 0 ]; then
        echoAndLog "Creating user in database"
        mysqlCreateAdminUserToDb ${OPENGNSYS_DATABASE} ${OPENGNSYS_DB_USER} "${OPENGNSYS_DB_PASSWD}"
        if [ $? -ne 0 ]; then
                errorAndLog "Error while creating database user"
                exit 1
        fi

fi

mysqlCheckDbIsEmpty ${OPENGNSYS_DATABASE}
if [ $? -eq 0 ]; then
        echoAndLog "Creating tables..."
        if [ -f $WORKDIR/$OPENGNSYS_DB_CREATION_FILE ]; then
                mysqlImportSqlFileToDb ${OPENGNSYS_DATABASE} $WORKDIR/$OPENGNSYS_DB_CREATION_FILE
        else
                errorAndLog "Unable to locate $WORKDIR/$OPENGNSYS_DB_CREATION_FILE!!"
                exit 1
        fi
else
        # Si existe fichero ogBDAdmin-VersLocal-VersRepo.sql; aplicar cambios.
        INSTVERSION=$(awk '{print $2}' $INSTALL_TARGET/doc/VERSION.txt)
        REPOVERSION=$(awk '{print $2}' $WORKDIR/opengnsys/doc/VERSION.txt)
        OPENGNSYS_DB_UPDATE_FILE="opengnsys/admin/Database/$OPENGNSYS_DATABASE-$INSTVERSION-$REPOVERSION.sql"
        if [ -f $WORKDIR/$OPENGNSYS_DB_UPDATE_FILE ]; then
                echoAndLog "Updating tables from version $INSTVERSION to $REPOVERSION"
                mysqlImportSqlFileToDb ${OPENGNSYS_DATABASE} $WORKDIR/$OPENGNSYS_DB_UPDATE_FILE
        else
                echoAndLog "Database unchanged."
        fi
fi
# Eliminar fichero temporal con credenciales de acceso a MySQL.
rm -f $TMPMYCNF

# copiando paqinas web
installWebFiles
# Generar páqinas web de documentación de la API
makeDoxygenFiles

# creando configuracion de apache2
installWebConsoleApacheConf $INSTALL_TARGET $APACHECFGDIR
if [ $? -ne 0 ]; then
        errorAndLog "Error configuring Apache for OpenGnSys Admin"
        exit 1
fi

popd

# Crear la estructura de los accesos al servidor desde el cliente (shared)
copyClientFiles
if [ $? -ne 0 ]; then
        errorAndLog "Error creating client structure"
fi

# Crear la estructura del cliente de OpenGnSys
clientCreate
if [ $? -ne 0 ]; then
        errorAndLog "Error creating client"
        exit 1
fi

# Configuración de servicios de OpenGnSys
openGnsysConfigure

# Mostrar sumario de la instalación e instrucciones de post-instalación.
installationSummary

#rm -rf $WORKDIR
echoAndLog "OpenGnSys installation finished at $(date)"
exit 0