#! /bin/sh
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#
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# Needed argument: pre | post
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#
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# pre mode : try to run mysql_install_db and fix perms and SELinux contexts
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# post mode : ping server until answer is received
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#
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get_option () {
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local section=$1
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local option=$2
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local default=$3
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ret=$(/usr/bin/my_print_defaults $section | grep '^--'${option}'=' | cut -d= -f2-)
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[ -z $ret ] && ret=$default
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echo $ret
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}
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install_db () {
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# Note: something different than datadir=/var/lib/mysql requires SELinux policy changes (in enforcing mode)
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datadir=$(get_option mysqld datadir "/var/lib/mysql")
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# Restore log, dir, perms and SELinux contexts
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[ -d "$datadir" ] || install -d -m 0755 -omysql -gmysql "$datadir" || exit 1
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log=/var/log/mysqld.log
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[ -e $log ] || touch $log
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chmod 0640 $log
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chown mysql:mysql $log || exit 1
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if [ -x /usr/sbin/restorecon ]; then
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/usr/sbin/restorecon "$datadir"
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/usr/sbin/restorecon $log
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fi
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# If special mysql dir is in place, skip db install
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[ -d "$datadir/mysql" ] && exit 0
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# Create initial db
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/usr/bin/mysql_install_db --rpm --datadir="$datadir" --user=mysql
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exit 0
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}
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pinger () {
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# Wait for ping to answer to signal startup completed,
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# might take a while in case of e.g. crash recovery
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# MySQL systemd service will timeout script if no answer
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datadir=$(get_option mysqld datadir "/var/lib/mysql")
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socket=$(get_option mysqld socket "$datadir/mysql.sock")
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case $socket in
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/*) adminsocket="$socket" ;;
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*) adminsocket="$datadir/$socket" ;;
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esac
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while /bin/true ; do
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sleep 1
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mysqladmin --no-defaults --socket="$adminsocket" --user=UNKNOWN_MYSQL_USER ping >/dev/null 2>&1 && break
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done
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exit 0
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}
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# main
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case $1 in
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"pre") install_db ;;
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"post") pinger ;;
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esac
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exit 0
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