mysql8.4/mysql-prepare-db-dir.sh

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#!/bin/sh
# This script creates the mysql data directory during first service start.
# In subsequent starts, it does nothing much.
#
# This script is meant to be run as non-root user either during initscript
# or systemd service execution, before starting the mysqld daemon.
# Running it as root may have some security risks, because it touches files
# that can be symlinks pointing to unexpected locations.
#
# On the other hand, when using non-standard locations for datadir and logfile,
# this script might not be able to create the files and the daemon won't start
# properly. A solution for that is to created the locations for datadir and
# logfile with correct ownership before starting the daemon.
source "`dirname ${BASH_SOURCE[0]}`/mysql-scripts-common"
# If two args given first is user, second is group
# otherwise the arg is the systemd service file
if [ "$#" -eq 2 ]
then
myuser="$1"
mygroup="$2"
else
# Absorb configuration settings from the specified systemd service file,
# or the default service if not specified
SERVICE_NAME="$1"
if [ x"$SERVICE_NAME" = x ]
then
SERVICE_NAME=@DAEMON_NAME@.service
fi
myuser=`systemctl show -p User "${SERVICE_NAME}" |
sed 's/^User=//'`
if [ x"$myuser" = x ]
then
myuser=mysql
fi
mygroup=`systemctl show -p Group "${SERVICE_NAME}" |
sed 's/^Group=//'`
if [ x"$mygroup" = x ]
then
mygroup=mysql
fi
fi
# Set up the errlogfile with appropriate permissions
if [ ! -e "$errlogfile" -a ! -h "$errlogfile" -a x$(dirname "$errlogfile") = "x/var/log" ]; then
case $(basename "$errlogfile") in
mysql*.log|mariadb*.log) install /dev/null -m0640 -o$myuser -g$mygroup "$errlogfile" ;;
*) ;;
esac
else
# Provide some advice if the log file cannot be created by this script
errlogdir=$(dirname "$errlogfile")
if ! [ -d "$errlogdir" ] ; then
echo "The directory $errlogdir does not exist."
exit 1
elif [ -e "$errlogfile" -a ! -w "$errlogfile" ] ; then
echo "The log file $errlogfile cannot be written, please, fix its permissions."
echo "The daemon will be run under $myuser:$mygroup"
exit 1
fi
fi
export LC_ALL=C
# Returns content of the specified directory
# If listing files fails, fake-file is returned so which means
# we'll behave like there was some data initialized
# Some files or directories are fine to be there, so those are
# explicitly removed from the listing
# @param <dir> datadir
list_datadir ()
{
( ls -1A "$1" 2>/dev/null || echo "fake-file" ) | grep -v \
-e '^lost+found$' \
-e '\.err$' \
-e '^\.bash_history$'
}
# Checks whether datadir should be initialized
# @param <dir> datadir
should_initialize ()
{
test -z "$(list_datadir "$1")"
}
# Make the data directory if doesn't exist or empty
if should_initialize "$datadir" ; then
# Now create the database
echo "Initializing @NICE_PROJECT_NAME@ database"
@bindir@/mysqld --initialize-insecure --datadir="$datadir" --user="$myuser"
ret=$?
if [ $ret -ne 0 ] ; then
echo "Initialization of @NICE_PROJECT_NAME@ database failed." >&2
echo "Perhaps @sysconfdir@/my.cnf is misconfigured." >&2
# Clean up any partially-created database files
if [ ! -e "$datadir/mysql/user.frm" ] ; then
rm -rf "$datadir"/*
fi
exit $ret
fi
# upgrade does not need to be run on a fresh datadir
echo "@VERSION@" >"$datadir/mysql_upgrade_info"
fi
exit 0