1#! /bin/sh
2#
3# Needed argument: pre | post
4#
5# pre mode  :  try to run mysql_install_db and fix perms and SELinux contexts
6# post mode :  ping server until answer is received
7#
8
9get_option () {
10    local section=$1
11    local option=$2
12    local default=$3
13    ret=$(/usr/bin/my_print_defaults $section | grep '^--'${option}'=' | cut -d= -f2-)
14    [ -z $ret ] && ret=$default
15    echo $ret
16}
17
18install_db () {
19    # Note: something different than datadir=/var/lib/mysql requires SELinux policy changes (in enforcing mode)
20    datadir=$(get_option mysqld datadir "/var/lib/mysql")
21
22    # Restore log, dir, perms and SELinux contexts
23    [ -d "$datadir" ] || install -d -m 0755 -omysql -gmysql "$datadir" || exit 1
24    log=/var/log/mysqld.log
25    [ -e $log ] || touch $log
26    chmod 0640 $log
27    chown mysql:mysql $log || exit 1
28    if [ -x /usr/sbin/restorecon ]; then
29        /usr/sbin/restorecon "$datadir"
30        /usr/sbin/restorecon $log
31    fi
32
33    # If special mysql dir is in place, skip db install
34    [ -d "$datadir/mysql" ] && exit 0
35
36    # Create initial db
37    /usr/bin/mysql_install_db --rpm --datadir="$datadir" --user=mysql
38    exit 0
39}
40
41pinger () {
42    # Wait for ping to answer to signal startup completed,
43    # might take a while in case of e.g. crash recovery
44    # MySQL systemd service will timeout script if no answer
45    datadir=$(get_option mysqld datadir "/var/lib/mysql")
46    socket=$(get_option  mysqld socket "$datadir/mysql.sock")
47    case $socket in
48        /*) adminsocket="$socket" ;;
49        *) adminsocket="$datadir/$socket" ;;
50    esac
51
52    while /bin/true ; do
53        sleep 1
54        mysqladmin --no-defaults --socket="$adminsocket" --user=UNKNOWN_MYSQL_USER ping >/dev/null 2>&1 && break
55    done
56    exit 0
57}
58
59# main
60case $1 in
61    "pre") install_db ;;
62    "post") pinger ;;
63esac
64
65exit 0
66
67