mysql5/mysql-5.7.27/packaging/deb-in/mysql-packagesource-server.preinst.in

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#!/bin/bash
# Copyright (c) 2015, 2017, Oracle and/or its affiliates. All rights reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
get_pcount () {
PSCOUNT=$(ps -ef | grep "/usr/sbin/mysqld" | wc -l)
echo "${PSCOUNT}"
}
server_stop () {
PSCOUNT=$(get_pcount)
COUNT=0
while :; do
COUNT=$(( COUNT+1 ))
echo -n .
if [ "${PSCOUNT}" -eq 1 ];
then
echo
break
fi
if [ "${COUNT}" -gt 15 ];
then
echo
return 1
fi
PSCOUNT=$(get_pcount)
sleep 1
done
return 0
}
case "$1" in
install)
if [ -z "$2" ];
then
set -e
if [ -x "/etc/init.d/mysql" ];
then
invoke-rc.d mysql stop || exit $?
server_stop
fi
# Native 5.5 packages create a /var/run/mysqld owned by root. This can cause
# errors in the systemd service, so we reset ownership if it exists.
MYSQLRUN=/var/run/mysqld
if [ -d ${MYSQLRUN} ]; then
install -d -m0755 -omysql -gmysql ${MYSQLRUN}
fi
set +e
fi
;;
upgrade)
set -e
#DEBHELPER#
server_stop
set +e
;;
abort-upgrade)
;;
*)
exit 1
;;
esac
exit 0