source: installer/opengnsys_update.sh @ b8774e7

#!/bin/bash
#/**
#@file    opengnsys_update.sh
#@brief   Script actualización de OpenGnsys
#@version 0.9 - basado en opengnsys_installer.sh
#@author  Ramón Gómez - ETSII Univ. Sevilla
#@date    2010/01/27
#@version 1.0 - adaptación a OpenGnSys 1.0
#@author  Ramón Gómez - ETSII Univ. Sevilla
#@date    2011/03/02
#@version 1.0.1 - control de auto actualización del script
#@author  Ramón Gómez - ETSII Univ. Sevilla
#@date    2011/05/17
#@version 1.0.2a - obtiene valor de dirección IP por defecto
#@author  Ramón Gómez - ETSII Univ. Sevilla
#@date    2012/01/18
#@version 1.0.3 - Compatibilidad con Debian y auto configuración de acceso a BD.
#@author  Ramón Gómez - ETSII Univ. Sevilla
#@date    2012/03/12
#@version 1.0.4 - Detector de distribución y compatibilidad con CentOS.
#@author  Ramón Gómez - ETSII Univ. Sevilla
#@date    2012/05/04
#@version 1.0.5 - Actualizar BD en la misma versión, compatibilidad con Fedora (systemd) y configuración de Rsync.
#@author  Ramón Gómez - ETSII Univ. Sevilla
#@date    2014/04/03
#@version 1.0.6 - Redefinir URLs de ficheros de configuración usando HTTPS.
#@author  Ramón Gómez - ETSII Univ. Sevilla
#@date    2015/03/12
#@version 1.1.0 - Instalación de API REST y configuración de zona horaria.
#@author  Ramón Gómez - ETSII Univ. Sevilla
#@date    2015/11/09
#@version 1.1.1a - Elegir versión a actualizar.
#@author  Ramón Gómez - ETSII Univ. Sevilla
#@date    2019/12/13
#*/


####  AVISO: NO EDITAR variables de configuración.
####  WARNING: DO NOT EDIT configuration variables.
INSTALL_TARGET=/opt/opengnsys           # Directorio de instalación
PATH=$PATH:$INSTALL_TARGET/bin
OPENGNSYS_CLIENTUSER="opengnsys"        # Usuario Samba


# Sólo ejecutable por usuario root
if [ "$(whoami)" != 'root' ]; then
        echo "ERROR: this program must run under root privileges!!"
        exit 1
fi
# Error si OpenGnsys no está instalado (no existe el directorio del proyecto)
if [ ! -d $INSTALL_TARGET ]; then
        echo "ERROR: OpenGnsys is not installed, cannot update!!"
        exit 1
fi
# Cargar configuración de acceso a la base de datos.
if [ -r $INSTALL_TARGET/etc/ogAdmServer.cfg ]; then
        source $INSTALL_TARGET/etc/ogAdmServer.cfg
fi
OPENGNSYS_DATABASE=${OPENGNSYS_DATABASE:-"$CATALOG"}            # Base de datos
OPENGNSYS_DBUSER=${OPENGNSYS_DBUSER:-"$USUARIO"}                # Usuario de acceso
OPENGNSYS_DBPASSWORD=${OPENGNSYS_DBPASSWORD:-"$PASSWORD"}       # Clave del usuario
if [ -z "$OPENGNSYS_DATABASE" -o -z "$OPENGNSYS_DBUSER" -o -z "$OPENGNSYS_DBPASSWORD" ]; then
        echo "ERROR: set OPENGNSYS_DATABASE, OPENGNSYS_DBUSER and OPENGNSYS_DBPASSWORD"
        echo "       variables, and run this script again."
        exit 1
fi

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

WORKDIR=/tmp/opengnsys_update
mkdir -p $WORKDIR

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



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

# Generar variables de configuración del actualizador
# Variables globales:
# - OSDISTRIB - distribución Linux
# - DEPENDENCIES - array de dependencias que deben estar instaladas
# - UPDATEPKGLIST, INSTALLPKGS, CHECKPKG - comandos para gestión de paquetes
# - APACHECFGDIR, APACHESERV, PHPFPMSERV, DHCPSERV, MYSQLSERV, MYSQLCFGDIR, INETDCFGDIR - configuración y servicios

function autoConfigure()
{
        local service

        # Detectar sistema operativo del servidor (compatible con fichero os-release y con LSB).
        if [ -f /etc/os-release ]; then
                source /etc/os-release
                OSDISTRIB="$ID"
                OSVERSION="$VERSION_ID"
        else
                OSDISTRIB=$(lsb_release -is 2>/dev/null)
                OSVERSION=$(lsb_release -rs 2>/dev/null)
        fi
        # Convertir distribución a minúsculas y obtener solo el 1er número de versión.
        OSDISTRIB="${OSDISTRIB,,}"
        OSVERSION="${OSVERSION%%.*}"

        # Configuración según la distribución de Linux.
        if [ -f /etc/debian_version ]; then
                # Distribución basada en paquetes Deb.
                DEPENDENCIES=( curl rsync btrfs-tools procps arp-scan realpath php-curl gettext moreutils jq wakeonlan udpcast libev-dev libjansson-dev libssl-dev shim-signed grub-efi-amd64-signed php-fpm gawk libdbi-dev libdbi1 libdbd-mysql)
                # Paquete correcto para realpath.
                [ -z "$(apt-cache pkgnames realpath)" ] && DEPENDENCIES=( ${DEPENDENCIES[@]//realpath/coreutils} )
                UPDATEPKGLIST="add-apt-repository -y ppa:ondrej/php; apt-get update"
                INSTALLPKGS="apt-get -y install"
                DELETEPKGS="apt-get -y purge"
                CHECKPKG="dpkg -s \$package 2>/dev/null | grep -q \"Status: install ok\""
                if which service &>/dev/null; then
                        STARTSERVICE="eval service \$service restart"
                        STOPSERVICE="eval service \$service stop"
                        SERVICESTATUS="eval service \$service status"
                else
                        STARTSERVICE="eval /etc/init.d/\$service restart"
                        STOPSERVICE="eval /etc/init.d/\$service stop"
                        SERVICESTATUS="eval /etc/init.d/\$service status"
                fi
                ENABLESERVICE="eval update-rc.d \$service defaults"
                APACHEENABLEMODS="ssl rewrite proxy_fcgi fastcgi actions alias"
                APACHEDISABLEMODS="php"
                APACHEUSER="www-data"
                APACHEGROUP="www-data"
                MYSQLCFGDIR=/etc/mysql/mysql.conf.d
                MYSQLSERV="mysql"
                PHPFPMSERV="php-fpm"
                INETDCFGDIR=/etc/xinetd.d
        elif [ -f /etc/redhat-release ]; then
                # Distribución basada en paquetes rpm.
                DEPENDENCIES=( curl rsync btrfs-progs procps-ng arp-scan gettext moreutils jq net-tools udpcast libev-devel jansson-devel openssl-devel shim-x64 grub2-efi-x64 grub2-efi-x64-modules gawk libdbi-devel libdbi libdbi-dbd-mysql)
                # Repositorios para PHP 7 en CentOS.
                [ "$OSDISTRIB" == "centos" ] && UPDATEPKGLIST="yum update -y https://dl.fedoraproject.org/pub/epel/epel-release-latest-$OSVERSION.noarch.rpm http://rpms.remirepo.net/enterprise/remi-release-$OSVERSION.rpm"
                INSTALLPKGS="yum install -y"
                DELETEPKGS="yum remove -y"
                CHECKPKG="rpm -q --quiet \$package"
                if which systemctl &>/dev/null; then
                        STARTSERVICE="eval systemctl restart \$service.service"
                        STOPSERVICE="eval systemctl stop \$service.service"
                        ENABLESERVICE="eval systemctl enable \$service.service"
                        SERVICESTATUS="eval systemctl status \$service.service"
                else
                        STARTSERVICE="eval service \$service restart"
                        STOPSERVICE="eval service \$service stop"
                        ENABLESERVICE="eval chkconfig \$service on"
                        SERVICESTATUS="eval service \$service status"
                fi
                APACHEUSER="apache"
                APACHEGROUP="apache"
                MYSQLCFGDIR=/etc/my.cnf.d
                MYSQLSERV="mariadb"
                PHPFPMSERV="php-fpm"
                INETDCFGDIR=/etc/xinetd.d
        else
                # Otras distribuciones.
                :
        fi
        for service in apache2 httpd; do
                [ -d "/etc/$service" ] && APACHECFGDIR="/etc/$service"
                if $SERVICESTATUS &>/dev/null; then APACHESERV="$service"; fi
        done
        for service in dhcpd dhcpd3-server isc-dhcp-server; do
                if $SERVICESTATUS &>/dev/null; then DHCPSERV="$service"; fi
        done
}


# Choose an available version to update.
function chooseVersion()
{
    local RELEASES DOWNLOADS INSTVERSION INSTRELEASE

    # Development branch.
    BRANCH="master"
    API_URL="https://api.github.com/repos/opengnsys/OpenGnsys/branches/$BRANCH"

    RELEASES=( )
    DOWNLOADS=( )
    # If updating from a local or very old version, use the default data.
    if [ $REMOTE -eq 1 ] && which jq &>/dev/null && [ -f $INSTALL_TARGET/doc/VERSION.json ]; then
        # Installed release.
        read -pe INSTVERSION INSTRELEASE <<< $(jq -r '.version+" "+.release' $INSTALL_TARGET/doc/VERSION.json)
        # Fetch tags (releases) data from GitHub.
        while read -pe TAG URL; do
            if [[ $TAG =~ ^opengnsys- ]]; then
                [ "${TAG#opengnsys-}" \< "${INSTVERSION%pre}" ] && break
                RELEASES+=( "${TAG}" )
                DOWNLOADS+=( "$URL" )
                #RELDATE=$(curl -s "$URL" | jq -r '.commit.committer.date | split("-") | join("")[:8]')
            fi
        done <<< $(curl -s "$API_URL/../../tags" | jq -r '.[] | .name+" "+.commit.url')
        # Add development (master) branch.
        RELEASES+=( "$BRANCH" )
        DOWNLOADS+=( "$API_URL" )
        # Show selection menu, if needed.
        if [ ${#RELEASES[@]} -gt 1 ]; then
            echo "Installed version: $INSTVERSION $INSTRELEASE"
            echo "Versions available for update (\"$BRANCH\" is the latest development branch):"
            PS3="Enter a number: "
            select opt in "${RELEASES[@]}"; do
                if [ -n "$opt" ]; then
                    BRANCH="$opt"
                    API_URL="${DOWNLOADS[REPLY-1]}"
                    break
                fi
            done
        fi
    fi
    # Download URLs.
    CODE_URL="https://codeload.github.com/opengnsys/OpenGnsys/zip/$BRANCH"
    RAW_URL="https://raw.githubusercontent.com/opengnsys/OpenGnsys/$BRANCH"
}


# Comprobar auto-actualización.
function checkAutoUpdate()
{
        local update=0

        # Actaulizar el script si ha cambiado o no existe el original.
        if [ $REMOTE -eq 1 ]; then
                curl -s $RAW_URL/installer/$PROGRAMNAME -o $PROGRAMNAME
                chmod +x $PROGRAMNAME
                if ! diff -q $PROGRAMNAME $INSTALL_TARGET/lib/$PROGRAMNAME 2>/dev/null || ! test -f $INSTALL_TARGET/lib/$PROGRAMNAME; then
                        mv $PROGRAMNAME $INSTALL_TARGET/lib
                        update=1
                else
                        rm -f $PROGRAMNAME
                fi
        else
                if ! diff -q $PROGRAMDIR/$PROGRAMNAME $INSTALL_TARGET/lib/$PROGRAMNAME 2>/dev/null || ! test -f $INSTALL_TARGET/lib/$PROGRAMNAME; then
                        cp -a $PROGRAMDIR/$PROGRAMNAME $INSTALL_TARGET/lib
                        update=1
                fi
        fi

        return $update
}


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

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

function errorAndLog()
{
        echo "ERROR: $1"
        DATETIME=`getDateTime`
        echo "$DATETIME;$SSH_CLIENT;ERROR: $1" >> $LOG_FILE
}

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


#####################################################################
####### Funciones de copia de seguridad y restauración de ficheros
#####################################################################

# 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 fichero=$1
        local fecha=`date +%Y%m%d`

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

        echoAndLog "${FUNCNAME}(): Making $fichero back-up"

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

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

# Restaura un fichero desde su copia de seguridad
function restoreFile()
{
        if [ $# -ne 1 ]; then
                errorAndLog "${FUNCNAME}(): invalid number of parameters"
                exit 1
        fi

        local fichero=$1

        echoAndLog "${FUNCNAME}(): restoring file $fichero"
        if [ -f "${fichero}-LAST" ]; then
                cp -a "$fichero-LAST" "$fichero"
        fi
}


#####################################################################
####### Funciones de acceso a base de datos
#####################################################################

# Actualizar la base datos
function importSqlFile()
{
        if [ $# -ne 4 ]; then
                errorAndLog "${FNCNAME}(): invalid number of parameters"
                exit 1
        fi

        local dbuser="$1"
        local dbpassword="$2"
        local database="$3"
        local sqlfile="$4"
        local tmpfile=$(mktemp)
        local mycnf=/tmp/.my.cnf.$$
        local status

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

        echoAndLog "${FUNCNAME}(): importing SQL file to ${database}..."
        chmod 600 $tmpfile
        sed -e "s/SERVERIP/$SERVERIP/g" -e "s/DBUSER/$OPENGNSYS_DB_USER/g" \
            -e "s/DBPASSWORD/$OPENGNSYS_DB_PASSWD/g" $sqlfile > $tmpfile
        # Componer fichero con credenciales de conexión.  
        touch $mycnf
        chmod 600 $mycnf
        cat << EOT > $mycnf
[client]
user=$dbuser
password=$dbpassword
EOT
        # Antes de actualizar, reasignar valores para campos no nulos con nulo por defecto.
        mysql --defaults-extra-file=$MYCNF -D "$database" -e \
                "$(mysql --defaults-extra-file=$MYCNF -Nse "
SELECT CASE WHEN DATA_TYPE LIKE '%int' THEN
                 CONCAT_WS(' ', 'ALTER TABLE', TABLE_NAME, 'ALTER', COLUMN_NAME, 'SET DEFAULT 0;')
            WHEN DATA_TYPE LIKE '%char' THEN
                 CONCAT_WS(' ', 'ALTER TABLE', TABLE_NAME, 'ALTER', COLUMN_NAME, 'SET DEFAULT \'\';')
            WHEN DATA_TYPE = 'text' THEN
                 CONCAT_WS(' ', 'ALTER TABLE', TABLE_NAME, 'MODIFY', COLUMN_NAME, 'TEXT NOT NULL;')
            ELSE ''
       END
  FROM information_schema.COLUMNS
 WHERE TABLE_SCHEMA='$database'
   AND IS_NULLABLE='NO'
   AND COLUMN_DEFAULT IS NULL
   AND COLUMN_KEY='';")"
        # Ejecutar actualización y borrar fichero de credenciales.
        mysql --defaults-extra-file=$mycnf --default-character-set=utf8 -D "$database" < $tmpfile
        status=$?
        rm -f $mycnf $tmpfile
        if [ $status -ne 0 ]; then
                errorAndLog "${FUNCNAME}(): error importing $sqlfile in database $database"
                return 1
        fi
        echoAndLog "${FUNCNAME}(): file imported to database $database"
        return 0
}

# Comprobar configuración de MySQL y recomendar cambios necesarios.
function checkMysqlConfig()
{
        echoAndLog "${FUNCNAME}(): checking MySQL configuration"

        cp -a $WORKDIR/opengnsys/server/etc/mysqld-og.cnf $MYSQLCFGDIR 2>/dev/null
        service=$MYSQLSERV; $STARTSERVICE

        echoAndLog "${FUNCNAME}(): MySQL configuration has checked"
        return 0
}

#####################################################################
####### Funciones de instalación de paquetes
#####################################################################

# Instalar las deependencias necesarias para el actualizador.
function installDependencies()
{
        local package

        # Comprobar si hay que actualizar PHP 5 a PHP 7.
        eval $UPDATEPKGLIST
        if [ -f /etc/debian_version ]; then
                # Basado en paquetes Deb.
                PHP7VERSION=$(apt-cache pkgnames php7 2>/dev/null | sort | head -1)
                PHPFPMSERV="${PHP7VERSION}-fpm"
                PHP5PKGS=( $(dpkg -l | awk '$2~/^php5/ {print $2}') )
                if [ -n "$PHP5PKGS" ]; then
                        $DELETEPKGS ${PHP5PKGS[@]}
                        PHP5PKGS[0]="$PHP7VERSION"
                        INSTALLDEPS=${PHP5PKGS[@]//php5*-/${PHP7VERSION}-}
                fi
        fi
        if [ "$OSDISTRIB" == "centos" ]; then
                PHP7VERSION=$(yum list -q php7\* 2>/dev/null | awk -F. '/^php/ {print $1; exit;}')
                PHPFPMSERV="${PHP7VERSION}-${PHPFPMSERV}"
                PHP5PKGS=( $(yum list installed | awk '$1~/^php/ && $2~/^5\./ {sub(/\..*$/, "", $1); print $1}') )
                if [ -n "$PHP5PKGS" ]; then
                        $DELETEPKGS ${PHP5PKGS[@]}
                        PHP5PKGS[0]="$PHP7VERSION-php"
                        INSTALLDEPS=${PHP5PKGS[@]//php-/${PHP7VERSION}-php}
                fi
        fi

        if [ $# = 0 ]; then
                echoAndLog "${FUNCNAME}(): no dependencies are needed"
        else
                while [ $# -gt 0 ]; do
                        package="${1/php/$PHP7VERSION}"
                        eval $CHECKPKG || INSTALLDEPS="$INSTALLDEPS $package"
                        shift
                done
                if [ -n "$INSTALLDEPS" ]; then
                        $INSTALLPKGS $INSTALLDEPS
                        if [ $? -ne 0 ]; then
                                errorAndLog "${FUNCNAME}(): cannot install some dependencies: $INSTALLDEPS"
                                return 1
                        fi
                fi
        fi
}


#####################################################################
####### Funciones para descargar código
#####################################################################

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

        local url="$1"

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

        curl "$url" -o opengnsys.zip && \
                unzip -qo opengnsys.zip && \
                rm -fr opengnsys && \
                mv "OpenGnsys-$BRANCH" opengnsys
        if [ $? -ne 0 ]; then
                errorAndLog "${FUNCNAME}(): error getting code from ${url}, verify your user and password"
                return 1
        fi
        rm -f opengnsys.zip
        echoAndLog "${FUNCNAME}(): code was downloaded"
        return 0
}


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

# Comprobar si existe conexión.
function checkNetworkConnection()
{
        OPENGNSYS_SERVER=${OPENGNSYS_SERVER:-"opengnsys.es"}
        if which curl &>/dev/null; then
                curl --connect-timeout 10 -s "https://$OPENGNSYS_SERVER" -o /dev/null && \
                        curl --connect-timeout 10 -s "http://$OPENGNSYS_SERVER" -o /dev/null
        elif which wget &>/dev/null; then
                wget --spider -q "https://$OPENGNSYS_SERVER" && \
                        wget --spider -q "http://$OPENGNSYS_SERVER"
        else
                echoAndLog "${FUNCNAME}(): Cannot execute \"wget\" nor \"curl\"."
                return 1
        fi
}

# Comprobar si la versión es anterior a la actual.
function checkVersion()
{
        local PRE

        # Obtener versión actual y versión a actualizar.
        [ -f $INSTALL_TARGET/doc/VERSION.txt ] && OLDVERSION=$(awk '{print $2}' $INSTALL_TARGET/doc/VERSION.txt 2>/dev/null)
        [ -f $INSTALL_TARGET/doc/VERSION.json ] && OLDVERSION=$(jq -r '.version' $INSTALL_TARGET/doc/VERSION.json 2>/dev/null)
        if [ $REMOTE -eq 1 ]; then
                NEWVERSION=$(curl -s $RAW_URL/doc/VERSION.json 2>/dev/null | jq -r '.version')
        else
                NEWVERSION=$(jq -r '.version' $PROGRAMDIR/../doc/VERSION.json 2>/dev/null)
        fi
        [[ "$NEWVERSION" =~ pre ]] && PRE=1

        # Comparar versiones.
        [[ "$NEWVERSION" < "${OLDVERSION/pre/}" ]] && return 1
        [ "${NEWVERSION/pre/}" == "$OLDVERSION" -a "$PRE" == "1" ] && return 1

        return 0
}

# Obtener los parámetros de red del servidor.
function getNetworkSettings()
{
        # Variables globales definidas:
        # - SERVERIP:   IP local de la interfaz por defecto.

        local DEVICES
        local dev

        SERVERIP="$ServidorAdm"
        DEVICES="$(ip -o link show up | awk '!/loopback/ {sub(/:.*/,"",$2); print $2}')"
        for dev in $DEVICES; do
                [ -z "$SERVERIP" ] && SERVERIP=$(ip -o addr show dev $dev | awk '$3~/inet$/ {sub (/\/.*/, ""); print ($4); exit;}')
        done
}


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

# Actualizar cliente OpenGnsys.
function updateClientFiles()
{
        local ENGINECFG=$INSTALL_TARGET/client/etc/engine.cfg

        # Actualizar ficheros del cliente.
        backupFile $ENGINECFG
        echoAndLog "${FUNCNAME}(): Updating OpenGnsys Client files"
        rsync -irplt $WORKDIR/opengnsys/client/shared/* $INSTALL_TARGET/client
        if [ $? -ne 0 ]; then
                errorAndLog "${FUNCNAME}(): error while updating client structure"
                exit 1
        fi

        # Actualizar librerías del motor de clonación.
        echoAndLog "${FUNCNAME}(): Updating OpenGnsys Cloning Engine files"
        rsync -irplt $WORKDIR/opengnsys/client/engine/*.lib* $INSTALL_TARGET/client/lib/engine/bin
        if [ $? -ne 0 ]; then
                errorAndLog "${FUNCNAME}(): error while updating engine files"
                exit 1
        fi
        # Actualizar fichero de configuración del motor de clonación.
        if ! grep -q "^TZ" $ENGINECFG; then
                TZ=$(timedatectl status | awk -F"[:()]" '/Time.*zone/ {print $2}')
                cat << EOT >> $ENGINECFG
# OpenGnsys Server timezone.
TZ="${TZ// /}"
EOT
        fi
        if ! diff -q ${ENGINECFG}{,-LAST} &>/dev/null; then
                NEWFILES="$NEWFILES $ENGINECFG"
        else
                rm -f ${ENGINECFG}-LAST
        fi
        # Obtener URL para descargas adicionales.
        DOWNLOADURL=$(oglivecli config download-url 2>/dev/null)
        DOWNLOADURL=${DOWNLOADURL:-"https://$OPENGNSYS_SERVER/trac/downloads"}

        echoAndLog "${FUNCNAME}(): client files successfully updated"
}

# Crear certificado para la firma de cargadores de arranque, si es necesario.
function createCerts ()
{
        local SSLCFGDIR=$INSTALL_TARGET/client/etc/ssl
        mkdir -p $SSLCFGDIR/{certs,private}
        if [ ! -f $SSLCFGDIR/private/opengnsys.key ]; then
                echoAndLog "${FUNCNAME}(): creating certificate files"
                openssl req -new -x509 -newkey rsa:2048 -keyout $SSLCFGDIR/private/opengnsys.key -out $SSLCFGDIR/certs/opengnsys.crt -nodes -days 3650 -subj "/CN=OpenGnsys/"
                openssl x509 -in $SSLCFGDIR/certs/opengnsys.crt -out $SSLCFGDIR/certs/opengnsys.cer -outform DER
                echoAndLog "${FUNCNAME}(): certificate successfully created"
        fi
}

# Configurar HTTPS y exportar usuario y grupo del servicio Apache.
function apacheConfiguration ()
{
        local config template module socketfile

        # Avtivar PHP-FPM.
        echoAndLog "${FUNCNAME}(): configuring PHP-FPM"
        service=$PHPFPMSERV
        $ENABLESERVICE; $STARTSERVICE

        # Activar módulos de Apache.
        if [ -e $APACHECFGDIR/sites-available/opengnsys.conf ]; then
                echoAndLog "${FUNCNAME}(): Configuring Apache modules"
                a2ensite default-ssl
                for module in $APACHEENABLEMODS; do a2enmod -q "$module"; done
                for module in $APACHEDISABLEMODS; do a2dismod -q "${module//PHP7VERSION}"; done
                a2ensite opengnsys
        elif [ -e $APACHECFGDIR/conf.modules.d ]; then
                echoAndLog "${FUNCNAME}(): Configuring Apache modules"
                sed -i '/rewrite/s/^#//' $APACHECFGDIR/*.conf
        fi
        # Elegir plantilla según versión de Apache.
        if [ -n "$(apachectl -v | grep "2\.[0-2]")" ]; then
               template=$WORKDIR/opengnsys/server/etc/apache-prev2.4.conf.tmpl > $config
        else
               template=$WORKDIR/opengnsys/server/etc/apache.conf.tmpl
        fi
        sockfile=$(find /run/php -name "php*.sock" -type s -print 2>/dev/null | tail -1)
        # Actualizar configuración de Apache a partir de fichero de plantilla.
        for config in $APACHECFGDIR/{,sites-available/}opengnsys.conf; do
                if [ -e $config ]; then
                        if [ -n "$sockfile" ]; then
                                sed -e "s,CONSOLEDIR,$INSTALL_TARGET/www,g; s,proxy:fcgi:.*,proxy:unix:${sockfile%% *}|fcgi://localhost\",g" $template > $config
                        else
                                sed -e "s,CONSOLEDIR,$INSTALL_TARGET/www,g" $template > $config
                        fi
                fi
        done

        # Reiniciar Apache.
        service=$APACHESERV; $STARTSERVICE

        # 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"}
}

# Configurar servicio Rsync.
function rsyncConfigure()
{
        local service 

        # Configurar acceso a Rsync.
        if [ ! -f /etc/rsyncd.conf ]; then
                echoAndLog "${FUNCNAME}(): Configuring Rsync service"
                NEWFILES="$NEWFILES /etc/rsyncd.conf"
                sed -e "s/CLIENTUSER/$OPENGNSYS_CLIENTUSER/g" \
                    $WORKDIR/opengnsys/repoman/etc/rsyncd.conf.tmpl > /etc/rsyncd.conf
                # Habilitar Rsync.
                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
                # Activar e iniciar Rsync.
                service="rsync"  $ENABLESERVICE
                service="xinetd"
                $ENABLESERVICE; $STARTSERVICE
        fi
}

# Copiar ficheros del OpenGnsys Web Console.
function updateWebFiles()
{
        local ERRCODE COMPATDIR f

        echoAndLog "${FUNCNAME}(): Updating web files..."

        # Copiar los ficheros nuevos conservando el archivo de configuración de acceso.
        backupFile $INSTALL_TARGET/www/controlacceso.php
        mv $INSTALL_TARGET/www $INSTALL_TARGET/WebConsole
        rsync -irplt $WORKDIR/opengnsys/admin/WebConsole $INSTALL_TARGET
        ERRCODE=$?
        mv $INSTALL_TARGET/WebConsole $INSTALL_TARGET/www
        rm -fr $INSTALL_TARGET/www/xajax
        unzip -o $WORKDIR/opengnsys/admin/slim-2.6.1.zip -d $INSTALL_TARGET/www/rest
        unzip -o $WORKDIR/opengnsys/admin/swagger-ui-2.2.5.zip -d $INSTALL_TARGET/www/rest
        if [ $ERRCODE != 0 ]; then
                errorAndLog "${FUNCNAME}(): Error updating web files."
                exit 1
        fi
        restoreFile $INSTALL_TARGET/www/controlacceso.php

        # Cambiar acceso a protocolo HTTPS.
        if grep -q "http://" $INSTALL_TARGET/www/controlacceso.php 2>/dev/null; then
                echoAndLog "${FUNCNAME}(): updating web access file"
                perl -pi -e 's!http://!https://!g' $INSTALL_TARGET/www/controlacceso.php
                NEWFILES="$NEWFILES $INSTALL_TARGET/www/controlacceso.php"
        fi

        # 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
        # Acceso al manual de usuario
        ln -fs ../doc/userManual $INSTALL_TARGET/www/userManual
        # Fichero de log de la API REST.
        touch $INSTALL_TARGET/log/{ogagent,rest,remotepc}.log

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

# Copiar ficheros en la zona de descargas de OpenGnsys Web Console.
function updateDownloadableFiles()
{
        local FILENAME=ogagentpkgs-$NEWVERSION.tar.gz
        local TARGETFILE=$WORKDIR/$FILENAME

        # Descargar archivo comprimido, si es necesario.
        if [ -s $PROGRAMDIR/$FILENAME ]; then
                echoAndLog "${FUNCNAME}(): Moving $PROGRAMDIR/$FILENAME file to $(dirname $TARGETFILE)"
                mv $PROGRAMDIR/$FILENAME $TARGETFILE
        else
                echoAndLog "${FUNCNAME}(): Downloading $FILENAME"
                curl $DOWNLOADURL/$FILENAME -o $TARGETFILE
        fi
        if [ ! -s $TARGETFILE ]; then
                errorAndLog "${FUNCNAME}(): Cannot download $FILENAME"
                return 1
        fi

        # Descomprimir fichero en zona de descargas.
        tar xvzf $TARGETFILE -C $INSTALL_TARGET/www/descargas
        if [ $? != 0 ]; then
                errorAndLog "${FUNCNAME}(): Error uncompressing archive $FILENAME"
                return 1
        fi
}

# Copiar carpeta de Interface 
function updateInterfaceAdm()
{ 
        local errcode=0 

        # Crear carpeta y copiar Interface 
        echoAndLog "${FUNCNAME}(): Copying Administration Interface Folder" 
        mv $INSTALL_TARGET/client/interfaceAdm $INSTALL_TARGET/client/Interface
        rsync -irplt $WORKDIR/opengnsys/admin/Interface $INSTALL_TARGET/client
        errcoce=$?
        mv $INSTALL_TARGET/client/Interface $INSTALL_TARGET/client/interfaceAdm
        if [ $errcode -ne 0 ]; then 
                echoAndLog "${FUNCNAME}(): error while updating admin interface" 
                exit 1
        fi 
        echoAndLog "${FUNCNAME}(): Admin interface successfully updated"
} 

# 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 "${FUNCNAME}(): unable to create Doxygen web files"
                return 1
        fi
        rm -fr "$INSTALL_TARGET/www/api"
        mv "$INSTALL_TARGET/www/html" "$INSTALL_TARGET/www/api"
        rm -fr $INSTALL_TARGET/www/{man,perlmod,rtf}
        echoAndLog "${FUNCNAME}(): Doxygen web files created successfully"
}


# Crea la estructura base de la instalación de opengnsys
function createDirs()
{
        # Crear estructura de directorios.
        echoAndLog "${FUNCNAME}(): creating directory paths in ${INSTALL_TARGET}"
        local dir MKNETDIR

        mkdir -p ${INSTALL_TARGET}/{bin,doc,etc,lib,sbin,www}
        mkdir -p ${INSTALL_TARGET}/{client,images/groups}
        mkdir -p ${INSTALL_TARGET}/log/clients
        ln -fs ${INSTALL_TARGET}/log /var/log/opengnsys
        # Detectar directorio de instalación de TFTP.
        if [ ! -L ${INSTALL_TARGET}/tftpboot ]; then
                for dir in /var/lib/tftpboot /srv/tftp; do
                        [ -d $dir ] && ln -fs $dir ${INSTALL_TARGET}/tftpboot
                done
        fi
        mkdir -p $INSTALL_TARGET/tftpboot/{menu.lst,grub}/examples
        if [ $? -ne 0 ]; then
                errorAndLog "${FUNCNAME}(): error while creating dirs. Do you have write permissions?"
                return 1
        fi
        ! [ -f $INSTALL_TARGET/tftpboot/menu.lst/templates/00unknown ] && mv $INSTALL_TARGET/tftpboot/menu.lst/templates/* $INSTALL_TARGET/tftpboot/menu.lst/examples
        ! [ -f $INSTALL_TARGET/tftpboot/grub/templates/10 ] && mv $INSTALL_TARGET/tftpboot/grub/templates/* $INSTALL_TARGET/tftpboot/grub/examples

        # Preparar arranque en red con Grub.
        for f in grub-mknetdir grub2-mknetdir; do
                if which $f &>/dev/null; then MKNETDIR=$f; fi
        done
        $MKNETDIR --net-directory=${INSTALL_TARGET}/tftpboot --subdir=grub

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

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

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

# Actualización incremental de la BD (versión actaul a actaul+1, hasta final-1 a final).
function updateDatabase()
{
        local DBDIR="$WORKDIR/opengnsys/admin/Database"
        local file FILES=""

        echoAndLog "${FUNCNAME}(): looking for database updates"
        pushd $DBDIR >/dev/null
        # Bucle de actualización incremental desde versión actual a la final.
        for file in $OPENGNSYS_DATABASE-*-*.sql; do
                case "$file" in
                        $OPENGNSYS_DATABASE-$OLDVERSION-$NEWVERSION.sql)
                                # Actualización única de versión inicial y final.
                                FILES="$FILES $file"
                                break
                                ;;
                        $OPENGNSYS_DATABASE-*-postinst.sql)
                                # Ignorar fichero específico de post-instalación.
                                ;;
                        $OPENGNSYS_DATABASE-$OLDVERSION-*.sql)
                                # Actualización de versión n a n+1.
                                FILES="$FILES $file"
                                OLDVERSION="$(echo ${file%.*} | cut -f3 -d-)"
                                ;;
                        $OPENGNSYS_DATABASE-*-$NEWVERSION.sql)
                                # Última actualización de versión final-1 a final.
                                if [ -n "$FILES" ]; then
                                        FILES="$FILES $file"
                                        break
                                fi
                                ;;
                esac
        done
        # Aplicar posible actualización propia para la versión final.
        file=$OPENGNSYS_DATABASE-$NEWVERSION.sql
        if [ -n "$FILES" -o "$OLDVERSION" = "$NEWVERSION" -a -r $file ]; then
                FILES="$FILES $file"
        fi

        popd >/dev/null
        if [ -n "$FILES" ]; then
                for file in $FILES; do
                        importSqlFile $OPENGNSYS_DBUSER $OPENGNSYS_DBPASSWORD $OPENGNSYS_DATABASE $DBDIR/$file
                done
                echoAndLog "${FUNCNAME}(): database is update"
        else
                echoAndLog "${FUNCNAME}(): database unchanged"
        fi
}

# Copia ficheros de configuración y ejecutables genéricos del servidor.
function updateServerFiles()
{
        # No copiar ficheros del antiguo cliente Initrd
        local SOURCES=( repoman/bin \
                        server/bin \
                        server/lib \
                        admin/Sources/Services/ogAdmServerAux \
                        admin/Sources/Services/ogAdmRepoAux \
                        server/tftpboot \
                        /usr/lib/shim/shimx64.efi.signed \
                        /usr/lib/grub/x86_64-efi-signed/grubnetx64.efi.signed \
                        installer/opengnsys_uninstall.sh \
                        installer/opengnsys_export.sh \
                        installer/opengnsys_import.sh \
                        doc )
        local TARGETS=( bin \
                        bin \
                        lib \
                        sbin/ogAdmServerAux \
                        sbin/ogAdmRepoAux \
                        tftpboot \
                        tftpboot/shimx64.efi.signed \
                        tftpboot/grubx64.efi \
                        lib/opengnsys_uninstall.sh \
                        lib/opengnsys_export.sh \
                        lib/opengnsys_import.sh \
                        doc )

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

        echoAndLog "${FUNCNAME}(): updating files in server directories"
        pushd $WORKDIR/opengnsys >/dev/null
        local i
        for (( i = 0; i < ${#SOURCES[@]}; i++ )); do
                if [ -d "$INSTALL_TARGET/${TARGETS[i]}" ]; then
                        rsync -irplt "${SOURCES[i]}" $(dirname $(readlink -e "$INSTALL_TARGET/${TARGETS[i]}"))
                else
                        rsync -irplt "${SOURCES[i]}" $(readlink -m "$INSTALL_TARGET/${TARGETS[i]}")
                fi
        done
        popd >/dev/null
        NEWFILES=""             # Ficheros de configuración que han cambiado de formato.
        if grep -q 'pxelinux.0' /etc/dhcp*/dhcpd*.conf; then
                echoAndLog "${FUNCNAME}(): updating DHCP files"
                perl -pi -e 's/pxelinux.0/grldr/' /etc/dhcp*/dhcpd*.conf
                service=$DHCPSERV; $STARTSERVICE
                NEWFILES="/etc/dhcp*/dhcpd*.conf"
        fi
        if ! grep -q 'shimx64.efi.signed' /etc/dhcp*/dhcpd*.conf; then
                echoAndLog "${FUNCNAME}(): updating DHCP files for UEFI computers"
                UEFICFG="    # 0007 == x64 EFI boot\n"\
"    if option arch = 00:07 {\n"\
"        filename \"shimx64.efi.signed\";\n"\
"    } else {\n"\
"        filename \"grldr\";\n"\
"    }"
                sed -i -e 1i"option arch code 93 = unsigned integer 16;" -e s@"^.*grldr\"\;"@"$UEFICFG"@g /etc/dhcp*/dhcpd*.conf
                service=$DHCPSERV; $STARTSERVICE
                NEWFILES="/etc/dhcp*/dhcpd*.conf"
        fi
        if ! diff -q $WORKDIR/opengnsys/admin/Sources/Services/opengnsys.init /etc/init.d/opengnsys 2>/dev/null; then
                echoAndLog "${FUNCNAME}(): updating new init file"
                backupFile /etc/init.d/opengnsys
                service="opengnsys"
                $STOPSERVICE
                cp -a $WORKDIR/opengnsys/admin/Sources/Services/opengnsys.init /etc/init.d/opengnsys
                systemctl daemon-reload
                $STARTSERVICE
                NEWFILES="$NEWFILES /etc/init.d/opengnsys"
        fi
        if ! diff -q $WORKDIR/opengnsys/admin/Sources/Services/opengnsys.default /etc/default/opengnsys >/dev/null; then
                echoAndLog "${FUNCNAME}(): updating new default file"
                backupFile /etc/default/opengnsys
                # Buscar si hay nuevos parámetros.
                local var valor
                while IFS="=" read -e var valor; do
                        [[ $var =~ ^# ]] || \
                                grep -q "^$var=" /etc/default/opengnsys || \
                                echo "$var=$valor" >> /etc/default/opengnsys
                done < $WORKDIR/opengnsys/admin/Sources/Services/opengnsys.default
                NEWFILES="$NEWFILES /etc/default/opengnsys"
        fi
        if egrep -q "(UrlMsg=.*msgbrowser.php)|(UrlMenu=http://)" $INSTALL_TARGET/client/etc/ogAdmClient.cfg 2>/dev/null; then
                echoAndLog "${FUNCNAME}(): updating new client config file"
                backupFile $INSTALL_TARGET/client/etc/ogAdmClient.cfg
                perl -pi -e 's!UrlMsg=.*msgbrowser\.php!UrlMsg=http://localhost/cgi-bin/httpd-log\.sh!g; s!UrlMenu=http://!UrlMenu=https://!g' $INSTALL_TARGET/client/etc/ogAdmClient.cfg
                NEWFILES="$NEWFILES $INSTALL_TARGET/client/etc/ogAdmClient.cfg"
        fi

        echoAndLog "${FUNCNAME}(): updating cron files"
        [ ! -f /etc/cron.d/torrentcreator ] && echo "* * * * *   root   [ -x $INSTALL_TARGET/bin/torrent-creator ] && $INSTALL_TARGET/bin/torrent-creator" > /etc/cron.d/torrentcreator
        [ ! -f /etc/cron.d/torrenttracker ] && echo "5 * * * *   root   [ -x $INSTALL_TARGET/bin/torrent-tracker ] && $INSTALL_TARGET/bin/torrent-tracker" > /etc/cron.d/torrenttracker
        [ ! -f /etc/cron.d/imagedelete ] && echo "* * * * *   root   [ -x $INSTALL_TARGET/bin/deletepreimage ] && $INSTALL_TARGET/bin/deletepreimage" > /etc/cron.d/imagedelete
        [ ! -f /etc/cron.d/ogagentqueue ] && echo "* * * * *   root   [ -x $INSTALL_TARGET/bin/ogagentqueue.cron ] && $INSTALL_TARGET/bin/ogagentqueue.cron" > /etc/cron.d/ogagentqueue

        echoAndLog "${FUNCNAME}(): deleting deprecated cron file"
        [ -e /etc/cron.d/opengnsys ] && rm -f /etc/cron.d/opengnsys \
                                              $INSTALL_TARGET/bin/opengnsys.cron

        # Se modifican los nombres de las plantilla PXE por compatibilidad con los equipos UEFI.
        if [ -f $INSTALL_TARGET/tftpboot/menu.lst/templates/01 ]; then
            BIOSPXEDIR="$INSTALL_TARGET/tftpboot/menu.lst/templates"
            mv $BIOSPXEDIR/01 $BIOSPXEDIR/10
            sed -i "s/\bMBR\b/1hd/" $BIOSPXEDIR/10
        fi
        echoAndLog "${FUNCNAME}(): server files successfully updated"
}

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

# Mueve el fichero del nuevo servicio si es distinto al del directorio destino.
function moveNewService()
{
        local service 

        # Recibe 2 parámetros: fichero origen y directorio destino.
        [ $# == 2 ] || return 1
        [ -f  $1 -a -d $2 ] || return 1

        # Comparar los ficheros.
        if ! diff -q $1 $2/$(basename $1) &>/dev/null; then
                # Parar los servicios si fuese necesario.
                service="opengnsys"
                [ -z "$NEWSERVICES" ] && $STOPSERVICE
                # Nuevo servicio.
                NEWSERVICES="$NEWSERVICES $(basename $1)"
                # Mover el nuevo fichero de servicio
                mv $1 $2
                $STARTSERVICE
        fi
}


# Recompilar y actualiza los serivicios y clientes.
function compileServices()
{
        local hayErrores=0

        # Compilar OpenGnsys Server
        echoAndLog "${FUNCNAME}(): Recompiling OpenGnsys Admin Server"
        pushd $WORKDIR/opengnsys/admin/Sources/Services/ogAdmServer
        autoreconf -fi && ./configure && make && moveNewService ogAdmServer $INSTALL_TARGET/sbin
        if [ $? -ne 0 ]; then
                echoAndLog "${FUNCNAME}(): error while compiling OpenGnsys Admin Server"
                hayErrores=1
        fi
        popd
        # Parar antiguo servicio de repositorio.
        pgrep ogAdmRepo > /dev/null && service="ogAdmRepo" $STOPSERVICE
        # Remove OpenGnsys Agent (ogAdmAgent)
        echoAndLog "${FUNCNAME}(): deleting deprecated OpenGnsys Agent"
        [ -e $INSTALL_TARGET/sbin/ogAdmAgent ] && \
                rm -f $INSTALL_TARGET/sbin/ogAdmAgent

        # Compilar OpenGnsys Client
        echoAndLog "${FUNCNAME}(): Recompiling OpenGnsys Client"
        pushd $WORKDIR/opengnsys/admin/Sources/Clients/ogAdmClient
        make && mv ogAdmClient $INSTALL_TARGET/client/bin
        if [ $? -ne 0 ]; then
                echoAndLog "${FUNCNAME}(): error while compiling OpenGnsys Client"
                hayErrores=1
        fi
        popd
        # Generar un API token de ogAdmServer si no existe en el fichero de configuración.
        grep -q "APITOKEN=" $INSTALL_TARGET/etc/ogAdmServer.cfg || \
                $INSTALL_TARGET/bin/settoken -f

        return $hayErrores
}


####################################################################
### Funciones instalacion cliente OpenGnsys
####################################################################

# Actualizar cliente OpenGnsys
function updateClient()
{
        #local FILENAME=ogLive-precise-3.2.0-23-generic-r5159.iso       # 1.1.0-rc6 (32-bit)
        local FILENAME=ogLive-bionic-5.0.0-27-generic-amd64-r20190830.7208cc9.iso       # 1.1.1-rc5
        local SOURCEFILE=$DOWNLOADURL/$FILENAME
        local TARGETFILE=$(oglivecli config download-dir)/$FILENAME
        local SOURCELENGTH
        local TARGETLENGTH
        local OGINITRD
        local SAMBAPASS

        # Comprobar si debe convertirse el antiguo cliente al nuevo formato ogLive.
        if oglivecli check | grep -q "oglivecli convert"; then
                echoAndLog "${FUNCNAME}(): Converting OpenGnsys Client to default ogLive"
                oglivecli convert
        fi
        # Comprobar si debe actualizarse el cliente.
        SOURCELENGTH=$(curl -sI $SOURCEFILE 2>&1 | awk '/Content-Length:/ {gsub("\r", ""); print $2}')
        TARGETLENGTH=$(stat -c "%s" $TARGETFILE 2>/dev/null)
        [ -z $TARGETLENGTH ] && TARGETLENGTH=0
        if [ "$SOURCELENGTH" != "$TARGETLENGTH" ]; then
                echoAndLog "${FUNCNAME}(): Downloading $FILENAME"
                oglivecli download $FILENAME
                if [ ! -s $TARGETFILE ]; then
                        errorAndLog "${FUNCNAME}(): Error downloading $FILENAME"
                        return 1
                fi
                # Actaulizar la imagen ISO del ogclient.
                echoAndLog "${FUNCNAME}(): Updatting ogLive client"
                oglivecli install $FILENAME
                
                INSTALLEDOGLIVE=${FILENAME%.*}

                echoAndLog "${FUNCNAME}(): ogLive successfully updated"
        else
                # Si no existe, crear el fichero de claves de Rsync.
                if [ ! -f /etc/rsyncd.secrets ]; then
                        echoAndLog "${FUNCNAME}(): Restoring ogLive access key"
                        OGINITRD=$(oglivecli config install-dir)/$(jq -r ".oglive[.default].directory")/oginitrd.img
                        SAMBAPASS=$(gzip -dc $OGINITRD | \
                                    cpio -i --to-stdout scripts/ogfunctions 2>&1 | \
                                    grep "^[    ].*OPTIONS=" | \
                                    sed 's/\(.*\)pass=\(\w*\)\(.*\)/\2/')
                        echo -ne "$SAMBAPASS\n$SAMBAPASS\n" | setsmbpass
                else
                        echoAndLog "${FUNCNAME}(): ogLive is already updated"
                fi
                # Versión del ogLive instalado.
                echo "${FILENAME%.*}" > $INSTALL_TARGET/doc/veroglive.txt 
        fi
}

# Comprobar permisos y ficheros.
function checkFiles()
{
        local LOGROTATEDIR=/etc/logrotate.d

        # Comprobar permisos adecuados.
        if [ -x $INSTALL_TARGET/bin/checkperms ]; then
                echoAndLog "${FUNCNAME}(): Checking permissions"
                OPENGNSYS_DIR="$INSTALL_TARGET" OPENGNSYS_USER="$OPENGNSYS_CLIENTUSER" APACHE_USER="$APACHE_RUN_USER" APACHE_GROUP="$APACHE_RUN_GROUP" $INSTALL_TARGET/bin/checkperms
        fi
        # Eliminamos el fichero de estado del tracker porque es incompatible entre los distintos paquetes
        if [ -f /tmp/dstate ]; then
                echoAndLog "${FUNCNAME}(): Deleting unused files"
                rm -f /tmp/dstate
        fi
        # Crear nuevos ficheros de logrotate y borrar el fichero antiguo.
        if [ -d $LOGROTATEDIR ]; then
                rm -f $LOGROTATEDIR/opengnsys
                if [ ! -f $LOGROTATEDIR/opengnsysServer ]; then
                        echoAndLog "${FUNCNAME}(): Creating logrotate configuration file for server"
                        sed -e "s/OPENGNSYSDIR/${INSTALL_TARGET//\//\\/}/g" \
                                $WORKDIR/opengnsys/server/etc/logrotate.tmpl > $LOGROTATEDIR/opengnsysServer
                fi
                if [ ! -f $LOGROTATEDIR/opengnsysRepo ]; then
                        echoAndLog "${FUNCNAME}(): Creating logrotate configuration file for repository"
                        sed -e "s/OPENGNSYSDIR/${INSTALL_TARGET//\//\\/}/g" \
                                $WORKDIR/opengnsys/server/etc/logrotate.tmpl > $LOGROTATEDIR/opengnsysRepo
                fi
        fi
}

# Resumen de actualización.
function updateSummary()
{
        # Actualizar fichero de versión y revisión.
        local VERSIONFILE REVISION
        VERSIONFILE="$INSTALL_TARGET/doc/VERSION.json"
        # Obtener revisión.
        if [ $REMOTE -eq 1 ]; then
                # Revisión: rAñoMesDía.Gitcommit (8 caracteres de fecha y 7 primeros de commit).
                if [ "$BRANCH" = "master" ]; then
                        REVISION=$(curl -s "$API_URL" | jq '"r" + (.commit.commit.committer.date | split("-") | join("")[:8]) + "." + (.commit.sha[:7])')
                else
                        REVISION=$(curl -s "$API_URL" | jq '"r" + (.commit.committer.date | split("-") | join("")[:8]) + "." + (.sha[:7])')
                fi
        else
                # Parámetro "release" del fichero JSON.
                REVISION=$(jq -r '.release' $PROGRAMDIR/../doc/VERSION.json 2>/dev/null)
        fi
        [ -f $VERSIONFILE ] || echo '{ "project": "OpenGnsys" }' > $VERSIONFILE
        jq ".release=$REVISION" $VERSIONFILE | sponge $VERSIONFILE
        VERSION="$(jq -r '[.project, .version, .codename, .release] | join(" ")' $VERSIONFILE 2>/dev/null)"
        # Borrar antiguo fichero de versión.
        rm -f "${VERSIONFILE/json/txt}"

        echo
        echoAndLog "OpenGnsys Update Summary"
        echo       "========================"
        echoAndLog "Project version:                  $VERSION"
        echoAndLog "Update log file:                  $LOG_FILE"
        [ "$NEWFILES" ] && echoAndLog "Check new config files:           $(echo $NEWFILES)"
        [ "$NEWSERVICES" ] && echoAndLog "New compiled services:            $(echo $NEWSERVICES)"
        echoAndLog "Warnings:"
        echoAndLog " - You must to clear web browser cache before loading OpenGnsys page"
        echoAndLog " - Run \"settoken\" script to update authentication tokens"
        [ "$INSTALLEDOGLIVE" ] && echoAndLog " - Installed new ogLive Client: $INSTALLEDOGLIVE"
        echoAndLog " - If you want to use BURG as boot manager, run following command as root:"
        echoAndLog "      curl $DOWNLOADURL/burg.tgz -o $INSTALL_TARGET/client/lib/burg.tgz"

        echo
}



#####################################################################
####### Proceso de actualización de OpenGnsys
#####################################################################


# Comprobar si hay conexión y detectar parámetros de red por defecto.
checkNetworkConnection
if [ $? -ne 0 ]; then
        errorAndLog "Error connecting to server. Causes:"
        errorAndLog " - Network is unreachable, check device parameters"
        errorAndLog " - You are inside a private network, configure the proxy service"
        errorAndLog " - Server is temporally down, try again later"
        exit 1
fi
getNetworkSettings

# Elegir versión y comprobar si se intanta actualizar a una versión anterior.
chooseVersion
checkVersion
if [ $? -ne 0 ]; then
        errorAndLog "Cannot downgrade to an older version ($OLDVERSION to $NEWVERSION)"
        errorAndLog "You must to uninstall OpenGnsys and install desired release"
        exit 1
fi

echoAndLog "OpenGnsys update begins at $(date)"
pushd $WORKDIR

# Comprobar auto-actualización del programa.
if [ "$PROGRAMDIR" != "$INSTALL_TARGET/bin" ]; then
        checkAutoUpdate
        if [ $? -ne 0 ]; then
                echoAndLog "OpenGnsys updater has been overwritten"
                echoAndLog "Please, run this script again"
                exit
        fi
fi

# Detectar datos de auto-configuración del instalador.
autoConfigure

# Instalar dependencias.
installDependencies ${DEPENDENCIES[*]}
if [ $? -ne 0 ]; then
        errorAndLog "Error: you must to install all needed dependencies"
        exit 1
fi

# 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 [ $REMOTE -eq 1 ]; then
        downloadCode $CODE_URL
        if [ $? -ne 0 ]; then
                errorAndLog "Error while getting code from repository"
                exit 1
        fi
else
        ln -fs "$(dirname $PROGRAMDIR)" opengnsys
fi

# Comprobar configuración de MySQL.
checkMysqlConfig $OPENGNSYS_DBUSER $OPENGNSYS_DBPASSWORD

# Actualizar la BD.
updateDatabase

# Actualizar ficheros complementarios del servidor
updateServerFiles
if [ $? -ne 0 ]; then
        errorAndLog "Error updating OpenGnsys Server files"
        exit 1
fi

# Configurar Rsync.
rsyncConfigure

# Actualizar ficheros del cliente.
updateClientFiles
createCerts
updateInterfaceAdm

# Actualizar páqinas web.
apacheConfiguration
updateWebFiles
if [ $? -ne 0 ]; then
        errorAndLog "Error updating OpenGnsys Web Admin files"
        exit 1
fi
# Actaulizar ficheros descargables.
updateDownloadableFiles
# Generar páginas Doxygen para instalar en el web
makeDoxygenFiles

# Recompilar y actualizar los servicios del sistema
if compileServices; then
        # Restart services, if necessary.
        if [ "$NEWSERVICES" ]; then
                echoAndLog "Restarting OpenGnsys services"
                service="opengnsys" $STARTSERVICE
        fi
else
        errorAndLog "Error compiling OpenGnsys services"
        exit 1
fi

# Actaulizar ficheros auxiliares del cliente
updateClient
if [ $? -ne 0 ]; then
        errorAndLog "Error updating client files"
        exit 1
fi

# Comprobar permisos y ficheros.
checkFiles

# Mostrar resumen de actualización.
updateSummary

rm -rf $WORKDIR
echoAndLog "OpenGnsys update finished at $(date)"

popd