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: /usr/share/mysql/ [ drwxr-xr-x ]
name : mysql-systemd-start #!/bin/bash # # Scripts to run by MySQL systemd service # # Needed argument: pre # # pre mode : try to perform sanity check for configuration, log, data # Read a config option from mysql. Note that this will only work if a config # file actually specifies the option, so it's important to specify a default # $1 is application (e.g. mysqld for server) # $2 is option # $3 is default value used if no config value is found get_mysql_option() { result=$(my_print_defaults "$1" | sed -n "s/^--$2=//p" | tail -n 1) if [ -z "$result" ]; then result="$3" fi echo "$result" } sanity () { if [ -e /etc/mysql/FROZEN -o -h /etc/mysql/FROZEN ]; then echo "MySQL has been frozen to prevent damage to your system. Please see /etc/mysql/FROZEN for help." exit 1 fi if [ ! -r /etc/mysql/my.cnf ]; then echo "MySQL configuration not found at /etc/mysql/my.cnf. Please create one." exit 1 fi datadir=$(get_mysql_option mysqld datadir "/var/lib/mysql") if [ ! -d "${datadir}" ] && [ ! -L "${datadir}" ]; then echo "MySQL data dir not found at ${datadir}. Please create one." exit 1 fi if [ ! -d "${datadir}/mysql" ] && [ ! -L "${datadir}/mysql" ]; then echo "MySQL system database not found in ${datadir}. Please run mysqld --initialize." exit 1 fi # Do a test start to make sure there are no configuration issues or similar # mysqld --verbose --help will output a full listing of settings and plugins. # To do so it needs to initialize the database, so it can be used as a test # for whether or not the server can start. We redirect stdout to /dev/null so # only the error messages are left. result=0 output=$(mysqld --verbose --help --innodb-read-only 2>&1 > /dev/null) || result=$? if [ ! "$result" = "0" ]; then echo "ERROR: Unable to start MySQL server:" >&2 echo "$output" >&2 echo "Please take a look at https://wiki.debian.org/Teams/MySQL/FAQ for tips on fixing common upgrade issues." >&2 echo "Once the problem is resolved, restart the service." >&2 exit 1 fi } case $1 in "pre") sanity ;; esac