source: server/bin/setserveraddr @ 0fd42f4

#!/bin/bash

#/**
#         setserveraddr {str_ipaddress | str_netiface}
#@file    setserveraddr
#@brief   Command the modifies configuration files to assign the default network interface.
#@param   str_ipaddress  IP address assigned to a network interface
#@param   str_netiface   network interface name defined by the operating system.
#@version Initial version.
#@author  Ramón M. Gómez - ETSII Univ. Sevilla
#@date    2011-01-25
#@version 1.0.5 - Regenerate configuration files.
#@author  Ramón M. Gómez - ETSII Univ. Sevilla
#@date    2014-06-06
#@version 1.1.1 - Updating menu URLs, PXE files, and repository API key.
#@author  Ramón M. Gómez - ETSII Univ. Sevilla
#@date    2018-11-15
#*/ ##


# Variables.
PROG="$(basename "$0")"
OPENGNSYS=/opt/opengnsys
PXEDIR=$OPENGNSYS/tftpboot/menu.lst
DEFAULTFILE=/etc/default/opengnsys

# Checking parameters.
if [ $# -ne 1 ]; then
        echo "$PROG: Incorrect operand. Format: $PROG ipaddress|netiface" >&2
        exit 1
fi
if [ "$USER" != "root" ]; then
        echo "$PROG: Need to be root." >&2
        exit 1
fi

# Showing warning to inform that initiated clients may hang.
read -rp "WARNING: initiated clients can hang. Continue? (y/n): " ANSWER
if [ "${ANSWER,,}" != "y" ]; then
        echo "Operation canceled."
        exit 0
fi

# Detecting network interfaces.
DEVICES=$(ip -o link show up | awk -F: '$2!~/lo/ {print $2}')
for DEV in $DEVICES; do
        # If the network interface is found, get its IP address.
        IP=$(ip -o addr show dev "$DEV" | awk '$3~/inet$/ {sub (/\/.*/, ""); print ($4)}')
        if [ "$DEV" == "$1" ] || [ "$IP" == "$1" ]; then
                SERVERIP="$IP"
                SERVERDEV="$DEV"
        fi
done

# Checking if IP address has been detected.
if [ -n "$SERVERIP" ]; then
        # Temporary files.
        tmpfile=$(mktemp /tmp/og.XXXXX)
        MYCNF=$(mktemp /tmp/.my.cnf.XXXXX)
        trap "rm -f $tmpfile $MYCNF" 1 2 3 6 9 15

        # Checking whether the DHCP settings need to be changed.
        CHANGE=0
        for f in /etc/{dhcp,hcp3}/dhcpd.conf; do
                if [ -f $f ]; then
                        # Changing DHCP "next-server" parameter.
                        file="${f/./-$SERVERDEV.}"
                        sed -e "s/next-server.*/next-server $SERVERIP;/" \
                            -e "s/option routers ;/option routers ${SERVERIP%.*}.1;/" $file >$tmpfile
                        # Copying and linking file if there are changes.
                        if [ ! $f -ef $file ] || ! diff -q $tmpfile $file &>/dev/null; then
                                mv $tmpfile $file
                                chmod 644 $file
                                ln -f $file $f
                                CHANGE=1
                        fi
                fi
        done
        # Restarting DHCP service if its configuration has changed.
        if [ $CHANGE == 1 ]; then
                for f in /etc/init.d/{isc-dhcp-server,dhcp3-server,dhcpd}; do
                        [ -x $f ] && $f restart
                done
        else
                echo "DHCP configuration has not changed."
        fi

        # Saving old IP address.
        source $OPENGNSYS/etc/ogAdmRepo.cfg
        OLDSERVERIP=$IPlocal

        # Checking if configuration files need to be modified.
        CHANGE=0
        for f in $OPENGNSYS/{etc/{ogAdmServer,ogAdmRepo,ogAdmAgent}.cfg,www/controlacceso.php,client/etc/ogAdmClient.cfg}; do
                # Error if configuration file cannot be found.
                if [ ! -f $f ]; then
                        echo "$PROG: File $file does not exist." >&2
                        exit 2
                fi
                # Updating configuration variables (if URLs does not contain "localhost").
                sed -e "s,ServidorAdm=.*,ServidorAdm=$SERVERIP," \
                    -e "s,IPlocal=.*,IPlocal=$SERVERIP," \
                    -e "s,UrlMenu=https?://\([^/]*\)/\(.*\),UrlMenu=https://$SERVERIP/\2," \
                    -e '/localhost/!s,https\?://[^/]*/\(.*\),https://'$SERVERIP'/\1,' $f >$tmpfile
                file="${f/./-$SERVERDEV.}"
                # Copying updated file, if needed.
                if [ ! $f -ef $file ] || ! diff -q $tmpfile $file &>/dev/null; then
                        cp $tmpfile $file
                        ln -f $file $f
                        CHANGE=1
                fi
        done

        # Processing when something has changed.
        if [ $CHANGE == 1 ]; then
                # Restart OpenGnsys services.
                /etc/init.d/opengnsys restart
                # If Repository is active, generating a new API token.
                source $DEFAULTFILE
                if [ "$RUN_OGADMREPO" == "yes" ]; then
                        REPOKEY=$(php -r 'echo md5(uniqid(rand(), true));')
                        sed -i -e "s/ApiToken=.*/ApiToken=$REPOKEY/" $OPENGNSYS/etc/ogAdmRepo.cfg
                        sed -i -e "s/APITOKEN=.*/APITOKEN=$REPOKEY/" $OPENGNSYS/etc/ogAdmServer.cfg
                fi
                # If OpenGnsys Server is active, updating the database.
                if [ "$RUN_OGADMSERVER" == "yes" ]; then
                        source $OPENGNSYS/etc/ogAdmServer.cfg
                        # Creating credentials file.
                        cat << EOT > $MYCNF
[client]
user=$USUARIO
password=$PASSWORD
EOT
                        # Updating OpenGnsys Server IP address.
                        mysql --defaults-extra-file=$MYCNF -D "$CATALOG" -e \
                                 "UPDATE entornos
                                     SET ipserveradm='$SERVERIP'
                                   WHERE identorno=1"
                        # If OpenGnsys Repository is active, updating IP address and API token.
                        if [ "$RUN_OGADMREPO" == "yes" ]; then
                                mysql --defaults-extra-file=$MYCNF -D "$CATALOG" -e \
                                         "UPDATE repositorios
                                             SET ip='$SERVERIP', apikey='$REPOKEY'
                                           WHERE ip='$OLDSERVERIP'"
                                unset REPOKEY
                        fi
                        # Updating all menu URLs.
                        mysql --defaults-extra-file=$MYCNF -D "$CATALOG" -e \
                                 "UPDATE menus
                                     SET htmlmenupub = REPLACE(htmlmenupub, '$OLDSERVERIP', '$SERVERIP'),
                                         htmlmenupri = REPLACE(htmlmenupri, '$OLDSERVERIP', '$SERVERIP');"
                        # Updating all PXE files.
                        find $PXEDIR -name "01-*" -exec sed -i -e "s/$OLDSERVERIP/$SERVERIP/g" {} \;
                fi

                # Showing manual task to do after execution.
                cat << EOT
Default server interface set to: $SERVERDEV ($SERVERIP)

Manual tasks:
- Check DHCP configuration file and restart service, if needed.
- Check PXE files.
- Log-in as Web Console user: 
  - Check menu URLs.
${REPOKEY:+"  - Update repository API token"}
EOT
        else
                # Showing message if nothing changes.
                echo "Default interface has not changed: $1"
        fi
else
        # Error if network interface is not found.
        echo "$PROG: Network device not found. Format: $PROG ipaddress|netiface" >&2
        exit 1
fi

# Removing temporary files.
rm -f $tmpfile $MYCNF