source: installer/opengnsys_update.sh @ 9c9de82

#!/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

source $INSTALL_TARGET/lib/ogfunctions.sh || exit 1

echo -n "Current version: "
if [ -r $INSTALL_TARGET/doc/VERSION.json ]; then
        jq -j '"OpenGnsys", .version, " ", .release' $INSTALL_TARGET/doc/VERSION.json
else
        cat $INSTALL_TARGET/doc/VERSION.txt
fi

echo -e "\nThe OpenGnsys version 1.2.0 was tested with full functionality on Ubuntu 18.04 with PHP 7.2."
echo " * If the update is made from a version prior to 1.1.1c, you must disable strict mode in mysql by adding in the configuration file: sql_mode = NO_ENGINE_SUBSTITUTION"
echo " * If you are going to perform an update from version 1.1.0, it is necessary to start with the operating system, moving it from Ubuntu 16.04 to Ubuntu 18.04, and then perform the OpenGnsys update."

echo -e -n "\nDo you want to continue? [y/N]: "
read -r GO_ON
if [ "${GO_ON^^}" != "Y" ]; then
        echo "We left the installation." && exit
fi

# Cargar configuración de acceso a la base de datos.
if [ -r $INSTALL_TARGET/etc/ogserver.json ]; then
        source_json_config $INSTALL_TARGET/etc/ogserver.json
elif [ -r $INSTALL_TARGET/etc/ogserver.cfg ]; then
        source $INSTALL_TARGET/etc/ogserver.cfg
elif [ -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 automake liblz4-tool software-properties-common )
                # Paquete correcto para realpath.
                [ -z "$(apt-cache pkgnames realpath)" ] && DEPENDENCIES=( ${DEPENDENCIES[@]//realpath/coreutils} )
                UPDATEPKGLIST="add-apt-repository -y ppa:ondrej/php; apt-get update"
                INSTALLPKGS="apt-get -y install"
                DELETEPKGS="apt-get -y purge"
                CHECKPKG="dpkg -s \$package 2>/dev/null | grep -q \"Status: install ok\""
                if which service &>/dev/null; then
                        STARTSERVICE="eval service \$service restart"
                        STOPSERVICE="eval service \$service stop"
                        SERVICESTATUS="eval service \$service status"
                else
                        STARTSERVICE="eval /etc/init.d/\$service restart"
                        STOPSERVICE="eval /etc/init.d/\$service stop"
                        SERVICESTATUS="eval /etc/init.d/\$service status"
                fi
                ENABLESERVICE="eval systemctl enable \$service.service"
                APACHEENABLEMODS="ssl rewrite proxy_fcgi fastcgi actions alias"
                APACHEDISABLEMODS="php"
                APACHEUSER="www-data"
                APACHEGROUP="www-data"
                MYSQLCFGDIR=/etc/mysql/mysql.conf.d
                MYSQLSERV="mysql"
                PHPFPMSERV="php-fpm"
                INETDCFGDIR=/etc/xinetd.d
        elif [ -f /etc/redhat-release ]; then
                # Distribución basada en paquetes rpm.
                DEPENDENCIES=( curl rsync btrfs-progs procps-ng arp-scan gettext moreutils jq net-tools udpcast libev-devel jansson-devel openssl-devel shim-x64 grub2-efi-x64 grub2-efi-x64-modules gawk libdbi-devel libdbi libdbi-dbd-mysql automake)
                # Repositorios para PHP 7 en CentOS.
                [ "$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 RELDATE

    # 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 -o -f $INSTALL_TARGET/doc/VERSION.txt ]; then
        # Installed release.
        [ -f $INSTALL_TARGET/doc/VERSION.json ] && read -pe INSTVERSION INSTRELEASE <<< $(jq -r '.version+" "+.release' $INSTALL_TARGET/doc/VERSION.json)
        [ -f $INSTALL_TARGET/doc/VERSION.txt ] && read -pe INSTVERSION INSTRELEASE <<< $(awk '{print $2,$3}' $INSTALL_TARGET/doc/VERSION.txt)
        # Fetch tags (releases) data from GitHub.
        while read -pe TAG URL; do
            if [[ $TAG =~ ^(opengnsys-|v)[0-9] ]]; then
                [ "${TAG#opengnsys-}" \< "${INSTVERSION%pre}" ] && continue
                [ "${TAG#v}" \< "${INSTVERSION%pre}" ] && continue
                RELDATE=$(curl -s "$URL" | jq -r '.commit.committer.date | split("-") | join("")[:8]')
                RELEASES+=( "${TAG} ($RELDATE)" )
                DOWNLOADS+=( "$URL" )
            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 (CTRL-C to exit): "
            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 $UPDATEPKGLIST
        if [ -f /etc/debian_version ]; then
                # Basado en paquetes Deb.
                PHP7VERSION="php7.2"
                PHPFPMSERV="${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#v}" 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 VERSIONFILE OGVERSION FILENAME TARGETFILE

        # Obtener versión a descargar.
        VERSIONFILE="$INSTALL_TARGET/doc/VERSION.json"
        OGVERSION="$(jq -r ".ogagent // \"$NEWVERSION\"" $VERSIONFILE 2>/dev/null || echo "$NEWVERSION")"
        FILENAME="ogagentpkgs-$OGVERSION.tar.gz"
        TARGETFILE=$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/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/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 \
             $WORKDIR/opengnsys/admin/Sources/Services/opengnsys.service \
             /lib/systemd/system/opengnsys.service 2>/dev/null; then
                echoAndLog "${FUNCNAME}(): updating new service file"
                backupFile /lib/systemd/system/opengnsys.service
                service="opengnsys"
                $STOPSERVICE
                cp -a \
                   $WORKDIR/opengnsys/admin/Sources/Services/opengnsys.service \
                   /lib/systemd/system/opengnsys.service
                systemctl daemon-reload
                $STARTSERVICE
                NEWFILES="$NEWFILES /lib/systemd/system/opengnsys.service"
        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

        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
}


# Compiling and updating OpenGnsys Server service
function ogServerCompilation()
{
        local ogserverUrl="https://codeload.github.com/opengnsys/ogServer/zip/$BRANCH"
        local error=0 serv

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

        if ! (curl "${ogserverUrl}" -o ogserver.zip && \
              unzip -qo "ogserver.zip")
        then
                errorAndLog "${FUNCNAME}(): "\
                            "error getting ogServer code from ${ogserverUrl}"
                return 1
        fi
        rm -f ogserver.zip
        echoAndLog "${FUNCNAME}(): ogServer code was downloaded"

        echoAndLog "${FUNCNAME}(): Recompiling OpenGnsys Admin Server"
        pushd "$WORKDIR/ogServer-${BRANCH#v}"
        autoreconf -fi && ./configure && make && moveNewService ogserver $INSTALL_TARGET/sbin
        if [ $? -ne 0 ]; then
                echoAndLog "${FUNCNAME}(): error while compiling OpenGnsys Server"
                error=1
        fi
        popd
        # Renaming OpenGnsys Server configuration file, if needed
        [ -e $INSTALL_TARGET/etc/ogAdmServer.cfg ] && \
            rm -f $INSTALL_TARGET/etc/ogAdmServer.cfg
        [ -e $INSTALL_TARGET/etc/ogserver.cfg ] && \
            rm -f $INSTALL_TARGET/etc/ogserver.cfg
        if [ ! -e $INSTALL_TARGET/etc/ogserver.json ]; then
                echo "{
                        \"rest\" : {
                                \"ip\" : \"$ServidorAdm\",
                                \"port\" : \"8888\",
                                \"api_token\": \"$APITOKEN\"
                        },
                        \"database\" : {
                                \"ip\": \"$datasource\",
                                \"port\": \"3306\",
                                \"name\" : \"$CATALOG\",
                                \"user\" : \"$USUARIO\",
                                \"pass\" : \"$PASSWORD\"
                        },
                        \"wol\" : {
                                \"interface\" : \"$INTERFACE\"
                        }
                }" | jq '.' > "$INSTALL_TARGET"/etc/ogserver.json
        fi
        # Remove old OpenGnsys services
        for serv in ogAdmAgent ogAdmRepo ogAdmServer; do
                pgrep $serv > /dev/null && pkill -9 $serv && \
                    echoAndLog "${FUNCNAME}(): removing deprecated $serv service"
                rm -f $INSTALL_TARGET/sbin/$serv
                if [ $serv != ogAdmRepo ]; then
                        rm -f $INSTALL_TARGET/etc/$serv.cfg
                fi
        done
        # Generating an ogServer API token, if it does not exist
        [ -z "$APITOKEN" ] && \
            $INSTALL_TARGET/bin/settoken -f
        # Updating service file, if needed
        if ! diff -q \
             "$WORKDIR"/ogServer-"${BRANCH#v}"/cfg/ogserver.service \
             /lib/systemd/system/ogserver.service 2>/dev/null; then
                service="opengnsys"
                $STOPSERVICE
                echoAndLog "${FUNCNAME}(): updating new service file"
                backupFile /lib/systemd/system/ogserver.service
                service="ogserver"
                $STOPSERVICE
                cp -a \
                   "$WORKDIR"/ogServer-"${BRANCH#v}"/cfg/ogserver.service \
                   /lib/systemd/system/ogserver.service
                systemctl daemon-reload
                $STARTSERVICE
                service="opengnsys"
                $STARTSERVICE
                NEWFILES="$NEWFILES /lib/systemd/system/ogserver.service"
        fi

        return $error
}


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

# Actualizar cliente OpenGnsys
function updateClient()
{
        local FILENAME=ogLive-bionic-5.4.0-40-generic-amd64-r20200629.85eceaf.iso       # 1.2 (64 bits)
        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
}

# Update ogClient
function updateOgClient()
{
        local ogclientUrl="https://codeload.github.com/opengnsys/ogClient/zip/$BRANCH"
        local CLIENTPASS

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

        if ! (curl "${ogclientUrl}" -o ogclient.zip && \
             unzip -qo ogclient.zip)
        then
                errorAndLog "${FUNCNAME}(): "\
                            "error getting ogClient code from ${ogclientUrl}"
                return 1
        fi
        if [ -e $INSTALL_TARGET/client/ogClient/cfg/ogclient.json ]; then
             rm -f ogClient-"${BRANCH#v}"/cfg/ogclient.json
        else
             CLIENTPASS=$(awk -F":" '{print $2}' /etc/rsyncd.secrets)
             sed -i -e 's/127.0.0.1/'$ServidorAdm'/' \
                -e 's/pass'.*$'/pass\": "'$CLIENTPASS'"/' \
                ogClient-"${BRANCH#v}"/cfg/ogclient.json
        fi
        rsync -irplt "ogClient-${BRANCH#v}/" $INSTALL_TARGET/client/ogClient
        rm -f ogclient.zip
        echoAndLog "${FUNCNAME}(): ogClient code was downloaded and updated"

        return 0
}

# 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 " - Review syslog configuration and logrotate by syslog,"
        echoAndLog "      in debug mode OpenGnsys log is very extensive."

        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 ogServerCompilation; then
        # Restart services, if necessary.
        if [ "$NEWSERVICES" ]; then
                echoAndLog "Restarting OpenGnsys services"
                service="opengnsys" $STARTSERVICE
                service="ogserver" $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

# Update ogClient
if ! updateOgClient; then
        errorAndLog "Error updating ogClient files"
        exit 1
fi

# Comprobar permisos y ficheros.
checkFiles

# Mostrar resumen de actualización.
updateSummary

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

popd