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- #!/bin/bash
- #
- ### BEGIN INIT INFO
- # Provides: mysql
- # Required-Start: $remote_fs $syslog
- # Required-Stop: $remote_fs $syslog
- # Should-Start: $network $time
- # Should-Stop: $network $time
- # Default-Start: 2 3 4 5
- # Default-Stop: 0 1 6
- # Short-Description: Start and stop the mysql database server daemon
- # Description: Controls the main MySQL database server daemon "mysqld"
- # and its wrapper script "mysqld_safe".
- ### END INIT INFO
- #
- set -e
- set -u
- ${DEBIAN_SCRIPT_DEBUG:+ set -v -x}
- test -x /usr/bin/mysqld_safe || exit 0
- . /lib/lsb/init-functions
- SELF=$(cd $(dirname $0); pwd -P)/$(basename $0)
- CONF=/etc/mysql/my.cnf
- MYADMIN="/usr/bin/mysqladmin --defaults-file=/etc/mysql/debian.cnf"
- # priority can be overriden and "-s" adds output to stderr
- ERR_LOGGER="logger -p daemon.err -t /etc/init.d/mysql -i"
- # Safeguard (relative paths, core dumps..)
- cd /
- umask 077
- # mysqladmin likes to read /root/.my.cnf. This is usually not what I want
- # as many admins e.g. only store a password without a username there and
- # so break my scripts.
- export HOME=/etc/mysql/
- ## Fetch a particular option from mysql's invocation.
- #
- # Usage: void mysqld_get_param option
- mysqld_get_param() {
- /usr/sbin/mysqld --print-defaults \
- | tr " " "\n" \
- | grep -- "--$1" \
- | tail -n 1 \
- | cut -d= -f2
- }
- ## Do some sanity checks before even trying to start mysqld.
- sanity_checks() {
- # check for config file
- if [ ! -r /etc/mysql/my.cnf ]; then
- log_warning_msg "$0: WARNING: /etc/mysql/my.cnf cannot be read. See README.Debian.gz"
- echo "WARNING: /etc/mysql/my.cnf cannot be read. See README.Debian.gz" | $ERR_LOGGER
- fi
- # check for diskspace shortage
- datadir=`mysqld_get_param datadir`
- if LC_ALL=C BLOCKSIZE= df --portability $datadir/. | tail -n 1 | awk '{ exit ($4>4096) }'; then
- log_failure_msg "$0: ERROR: The partition with $datadir is too full!"
- echo "ERROR: The partition with $datadir is too full!" | $ERR_LOGGER
- exit 1
- fi
- }
- ## Checks if there is a server running and if so if it is accessible.
- #
- # check_alive insists on a pingable server
- # check_dead also fails if there is a lost mysqld in the process list
- #
- # Usage: boolean mysqld_status [check_alive|check_dead] [warn|nowarn]
- mysqld_status () {
- ping_output=`$MYADMIN ping 2>&1`; ping_alive=$(( ! $? ))
- ps_alive=0
- pidfile=`mysqld_get_param pid-file`
- if [ -f "$pidfile" ] && ps `cat $pidfile` >/dev/null 2>&1; then ps_alive=1; fi
- if [ "$1" = "check_alive" -a $ping_alive = 1 ] ||
- [ "$1" = "check_dead" -a $ping_alive = 0 -a $ps_alive = 0 ]; then
- return 0 # EXIT_SUCCESS
- else
- if [ "$2" = "warn" ]; then
- echo -e "$ps_alive processes alive and '$MYADMIN ping' resulted in\n$ping_output\n" | $ERR_LOGGER -p daemon.debug
- fi
- return 1 # EXIT_FAILURE
- fi
- }
- #
- # main()
- #
- case "${1:-''}" in
- 'start')
- sanity_checks;
- # Start daemon
- log_daemon_msg "Starting MySQL database server" "mysqld"
- if mysqld_status check_alive nowarn; then
- log_progress_msg "already running"
- log_end_msg 0
- else
- # Could be removed during boot
- test -e /var/run/mysqld || install -m 755 -o mysql -g root -d /var/run/mysqld
- # Start MySQL!
- su - mysql -s /bin/sh -c "/usr/bin/mysqld_safe > /dev/null 2>&1 &"
- # 6s was reported in #352070 to be too few when using ndbcluster
- # 14s was reported in #736452 to be too few with large installs
- for i in $(seq 1 30); do
- sleep 1
- if mysqld_status check_alive nowarn ; then break; fi
- log_progress_msg "."
- done
- if mysqld_status check_alive warn; then
- log_end_msg 0
- # Now start mysqlcheck or whatever the admin wants.
- output=$(/etc/mysql/debian-start)
- [ -n "$output" ] && log_action_msg "$output"
- else
- log_end_msg 1
- log_failure_msg "Please take a look at the syslog"
- fi
- fi
- ;;
- 'stop')
- # * As a passwordless mysqladmin (e.g. via ~/.my.cnf) must be possible
- # at least for cron, we can rely on it here, too. (although we have
- # to specify it explicit as e.g. sudo environments points to the normal
- # users home and not /root)
- log_daemon_msg "Stopping MySQL database server" "mysqld"
- if ! mysqld_status check_dead nowarn; then
- set +e
- shutdown_out=`$MYADMIN shutdown 2>&1`; r=$?
- set -e
- if [ "$r" -ne 0 ]; then
- log_end_msg 1
- [ "$VERBOSE" != "no" ] && log_failure_msg "Error: $shutdown_out"
- log_daemon_msg "Killing MySQL database server by signal" "mysqld"
- killall -15 mysqld
- server_down=
- for i in 1 2 3 4 5 6 7 8 9 10; do
- sleep 1
- if mysqld_status check_dead nowarn; then server_down=1; break; fi
- done
- if test -z "$server_down"; then killall -9 mysqld; fi
- fi
- fi
- if ! mysqld_status check_dead warn; then
- log_end_msg 1
- log_failure_msg "Please stop MySQL manually and read /usr/share/doc/mysql-server-5.7/README.Debian.gz!"
- exit -1
- else
- log_end_msg 0
- fi
- ;;
- 'restart')
- set +e; $SELF stop; set -e
- $SELF start
- ;;
- 'reload'|'force-reload')
- log_daemon_msg "Reloading MySQL database server" "mysqld"
- $MYADMIN reload
- log_end_msg 0
- ;;
- 'status')
- if mysqld_status check_alive nowarn; then
- log_action_msg "$($MYADMIN version)"
- else
- log_action_msg "MySQL is stopped."
- exit 3
- fi
- ;;
- *)
- echo "Usage: $SELF start|stop|restart|reload|force-reload|status"
- exit 1
- ;;
- esac
- # Some success paths end up returning non-zero so exit 0 explicitly. See
- # bug #739846.
- exit 0
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