#!/bin/sh
#
# mysqld        This shell script takes care of starting and stopping
#               the MySQL subsystem (mysqld).
#
# chkconfig: 345 64 36
# description:  MySQL database server.
# processname: mysqld
# config: /etc/my.cnf
# pidfile: /var/run/mysqld/mysqld.pid

# Source function library.
. /etc/rc.d/init.d/functions

# Source networking configuration.
. /etc/sysconfig/network


exec="/usr/bin/mysqld_safe"
prog="mysqld"

# Set timeouts here so they can be overridden from /etc/sysconfig/mysqld
STARTTIMEOUT=120
STOPTIMEOUT=600

# Set in /etc/sysconfig/mysqld, will be passed to mysqld_safe
MYSQLD_OPTS=

[ -e /etc/sysconfig/$prog ] && . /etc/sysconfig/$prog

lockfile=/var/lock/subsys/$prog

# Support for extra options passed to mysqld
command=$1 && shift
extra_opts="$@"

# Extract value of a MySQL option from config files
# Usage: get_mysql_option OPTION DEFAULT SECTION1 SECTION2 SECTIONN
# Result is returned in $result
# We use my_print_defaults which prints all options from multiple files,
# with the more specific ones later; hence take the last match.
get_mysql_option () {
    option=$1
    default=$2
    shift 2
    result=$(/usr/bin/my_print_defaults "$@" | sed -n "s/^--${option}=//p" | tail -n 1)
    if [ -z "$result" ]; then
        # not found, use default
        result="${default}"
    fi
}

get_mysql_option datadir "/var/lib/mysql" mysqld
datadir="$result"
get_mysql_option socket "$datadir/mysql.sock" mysqld
socketfile="$result"
get_mysql_option log-error "/var/log/mysqld.log" mysqld mysqld_safe
errlogfile="$result"
get_mysql_option pid-file "/var/run/mysqld/mysqld.pid" mysqld mysqld_safe
mypidfile="$result"

case $socketfile in
    /*) adminsocket="$socketfile" ;;
     *) adminsocket="$datadir/$socketfile" ;;
esac

install_validate_password_sql_file () {
    local initfile
    initfile="$(mktemp /var/lib/mysql-files/install-validate-password-plugin.XXXXXX.sql)"
    chmod a+r "$initfile"
    echo "SET @@SESSION.SQL_LOG_BIN=0;" > "$initfile"
    echo "INSERT INTO mysql.component (component_id, component_group_id, component_urn) VALUES (1, 1, 'file://component_validate_password');" >> "$initfile"
    echo "$initfile"
}

start(){
    [ -x $exec ] || exit 5
    # check to see if it's already running
    RESPONSE=$(/usr/bin/mysqladmin --no-defaults --socket="$adminsocket" --user=UNKNOWN_MYSQL_USER ping 2>&1)
    if [ $? = 0 ]; then
        # already running, do nothing
        action $"Starting $prog: " /bin/true
        ret=0
    elif echo "$RESPONSE" | grep -q "Access denied for user"
    then
        # already running, do nothing
        action $"Starting $prog: " /bin/true
        ret=0
    else
        # prepare for start
        if [ ! -e "$errlogfile" -a ! -h "$errlogfile" -a "x$(dirname "$errlogfile")" = "x/var/log" ]; then
            install /dev/null -m0640 -omysql -gmysql "$errlogfile"
        fi
        [ -x /sbin/restorecon ] && /sbin/restorecon "$errlogfile"
        if [ ! -d "$datadir/mysql" ] ; then
            # First, make sure $datadir is there with correct permissions
            if [ ! -d "$datadir" -a ! -h "$datadir" -a "x$(dirname "$datadir")" = "x/var/lib" ]; then
                install -d -m0751 -omysql -gmysql "$datadir" || exit 1
            fi
            if [ ! -h "$datadir" -a "x$(dirname "$datadir")" = "x/var/lib" ]; then
                chown mysql:mysql "$datadir"
                chmod 0751 "$datadir"
            fi
            if [ -x /sbin/restorecon ]; then
                /sbin/restorecon "$datadir"
                for dir in /var/lib/mysql-files /var/lib/mysql-keyring ; do
                    if [ -x /usr/sbin/semanage -a -d /var/lib/mysql -a -d $dir ] ; then
                        /usr/sbin/semanage fcontext -a -e /var/lib/mysql $dir >/dev/null 2>&1
                        /sbin/restorecon -r $dir
                    fi
                done
            fi
            # Now create the database
            initfile="$(install_validate_password_sql_file)"
            action $"Initializing MySQL database: " /usr/sbin/mysqld --initialize --datadir="$datadir" --user=mysql --init-file="$initfile"
            ret=$?
            rm -f "$initfile"
            [ $ret -ne 0 ] && return $ret
            if [ ! -h "$datadir" -a "x$(dirname "$datadir")" = "x/var/lib" ]; then
                chown -R mysql:mysql "$datadir"
            fi
            # Generate certs if needed
            if [ -x /usr/bin/mysql_ssl_rsa_setup -a ! -e "${datadir}/server-key.pem" ] ; then
                /usr/bin/mysql_ssl_rsa_setup --datadir="$datadir" --uid=mysql >/dev/null 2>&1
            fi
        fi
        if [ ! -h "$datadir" -a "x$(dirname "$datadir")" = "x/var/lib" ]; then
            chown mysql:mysql "$datadir"
            chmod 0751 "$datadir"
        fi
        # Pass all the options determined above, to ensure consistent behavior.
        # In many cases mysqld_safe would arrive at the same conclusions anyway
        # but we need to be sure.  (An exception is that we don't force the
        # log-error setting, since this script doesn't really depend on that,
        # and some users might prefer to configure logging to syslog.)
        # Note: set --basedir to prevent probes that might trigger SELinux
        # alarms, per bug #547485
        $exec $MYSQLD_OPTS --datadir="$datadir" --socket="$socketfile" \
                --pid-file="$mypidfile" \
                --basedir=/usr --user=mysql $extra_opts >/dev/null &
        safe_pid=$!
        # Spin for a maximum of N seconds waiting for the server to come up;
        # exit the loop immediately if mysqld_safe process disappears.
        # Rather than assuming we know a valid username, accept an "access
        # denied" response as meaning the server is functioning.
        ret=0
        TIMEOUT="$STARTTIMEOUT"
        while [ $TIMEOUT -gt 0 ]; do
            RESPONSE=$(/usr/bin/mysqladmin --no-defaults --socket="$adminsocket" --user=UNKNOWN_MYSQL_USER ping 2>&1) && break
            echo "$RESPONSE" | grep -q "Access denied for user" && break
            if ! /bin/kill -0 $safe_pid 2>/dev/null; then
                echo "GreatSQL MySQL Daemon failed to start."
                ret=1
                break
            fi
            sleep 1
            let TIMEOUT=${TIMEOUT}-1
        done
        if [ $TIMEOUT -eq 0 ]; then
            echo "Timeout error occurred trying to start GreatSQL MySQL Daemon."
            ret=1
        fi
        if [ $ret -eq 0 ]; then
            action $"Starting $prog: " /bin/true
            touch $lockfile
        else
            action $"Starting $prog: " /bin/false
        fi
    fi
    return $ret
}

stop(){
        if [ ! -f "$mypidfile" ]; then
            # not running; per LSB standards this is "ok"
            action $"Stopping $prog: " /bin/true
            return 0
        fi
        MYSQLPID=$(cat "$mypidfile")
        if [ -n "$MYSQLPID" ]; then
            /bin/kill "$MYSQLPID" >/dev/null 2>&1
            ret=$?
            if [ $ret -eq 0 ]; then
                TIMEOUT="$STOPTIMEOUT"
                while [ $TIMEOUT -gt 0 ]; do
                    /bin/kill -0 "$MYSQLPID" >/dev/null 2>&1 || break
                    sleep 1
                    let TIMEOUT=${TIMEOUT}-1
                done
                if [ $TIMEOUT -eq 0 ]; then
                    echo "Timeout error occurred trying to stop GreatSQL MySQL Daemon."
                    ret=1
                    action $"Stopping $prog: " /bin/false
                else
                    rm -f $lockfile
                    rm -f "$socketfile"
                    action $"Stopping $prog: " /bin/true
                fi
            else
                action $"Stopping $prog: " /bin/false
            fi
        else
            # failed to read pidfile, probably insufficient permissions
            action $"Stopping $prog: " /bin/false
            ret=4
        fi
        return $ret
}

restart(){
    stop
    start
}

condrestart(){
    [ -e $lockfile ] && restart || :
}


# See how we were called.
case "$command" in
  start)
    start
    ;;
  stop)
    stop
    ;;
  status)
    status -p "$mypidfile" $prog
    ;;
  restart)
    restart
    ;;
  condrestart|try-restart)
    condrestart
    ;;
  reload)
    exit 3
    ;;
  force-reload)
    restart
    ;;
  *)
    echo $"Usage: $0 {start|stop|status|restart|condrestart|try-restart|reload|force-reload}"
    exit 2
esac

exit $?