#!/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$(dirname @LOG_LOCATION@) ]; 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"

    @libexecdir@/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