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#!/bin/bash
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#
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# nis.sh: dhclient-script plugin for NIS settings,
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# place in /etc/dhcp/dhclient.d and 'chmod +x nis.sh' to enable
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#
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# Copyright (C) 2008 Red Hat, Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# Author(s): David Cantrell <dcantrell@redhat.com>
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CONF=/etc/yp.conf
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SAVECONF=${SAVEDIR}/${CONF##*/}.predhclient.${interface}
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fix_context() {
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if [ -x /sbin/restorecon ]; then
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/sbin/restorecon ${1} >/dev/null 2>&1
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fi
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}
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save_config_file() {
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if [ ! -d ${SAVEDIR} ]; then
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mkdir -p ${SAVEDIR}
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fi
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if [ -e ${CONF} ]; then
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# cp+rm instead of mv: preserve SELinux context
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# rhbz#509240
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# Do not rely on restorecon.
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cp -c ${CONF} ${SAVECONF}
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rm ${CONF}
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else
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echo > ${SAVECONF}
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# Try restorecon
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fix_context ${SAVECONF}
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fi
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}
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nis_config() {
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if [ ! "${PEERNIS}" = "no" ]; then
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if [ -n "${new_nis_domain}" ]; then
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domainname "${new_nis_domain}"
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save_config_file
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echo '# generated by /sbin/dhclient-script' > ${CONF}
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fix_context ${CONF}
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if [ -n "${new_nis_servers}" ]; then
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for i in ${new_nis_servers} ; do
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echo "domain ${new_nis_domain} server ${i}" >> ${CONF}
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done
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else
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echo "domain ${new_nis_domain} broadcast" >> ${CONF}
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fi
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elif [ -n "${new_nis_servers}" ]; then
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save_config_file
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echo '# generated by /sbin/dhclient-script' > ${CONF}
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fix_context ${CONF}
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for i in ${new_nis_servers} ; do
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echo "ypserver ${i}" >> ${CONF}
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done
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fi
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# domainname or servers changed, restart ypbind
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if [ "${old_nis_domain}" != "${new_nis_domain}" ] \
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|| [ "${old_nis_servers}" != "${new_nis_servers}" ]
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then
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service ypbind condrestart >/dev/null 2>&1
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fi
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fi
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}
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nis_restore() {
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if [ ! "${PEERNIS}" = "no" ]; then
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if [ -f ${SAVECONF} ]; then
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rm -f ${CONF}
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# cp+rm instead of mv: preserve SELinux context
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# rhbz#509240
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cp -c ${SAVECONF} ${CONF}
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rm ${SAVECONF}
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fix_context ${CONF} # Restorecon again to be sure.
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service ypbind condrestart >/dev/null 2>&1
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fi
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fi
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}
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# Local Variables:
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# indent-tabs-mode: nil
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# sh-basic-offset: 4
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# show-trailing-whitespace: t
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# End:
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