+#!/bin/bash
+#
+# MySQL daemon start/stop script.
+#
+# Debian version. Based on the original by TcX.
+#
+set -e
+set -u
+${DEBIAN_SCRIPT_DEBUG:+ set -v -x}
+
+test -x /usr/sbin/mysqld || exit 0
+
+SELF=$(cd $(dirname $0); pwd -P)/$(basename $0)
+CONF=/etc/mysql/my.cnf
+MYADMIN="/usr/bin/mysqladmin --defaults-file=/etc/mysql/debian.cnf"
+RUNDIR=/var/run/mysqld/
+
+# 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
+export PATH=/bin:/usr/bin
+
+# 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 -- "--$1" \
+ | tail -n 1 \
+ | cut -d= -f2
+}
+
+## Checks if there is a server running and if so if it is accessible.
+#
+# check_alive insists on a pingable server
+# check_dead also fails if there is a lost mysqld in the process list
+#
+# Usage: boolean mysqld_status [check_alive|check_dead] [warn|nowarn]
+mysqld_status () {
+ ping_output=`$MYADMIN ping 2>&1`; ping_alive=$(( ! $? ))
+
+ ps_alive=0
+ pidfile=`mysqld_get_param pid-file`
+ if [ -f "$pidfile" ]; then
+ if ps `cat $pidfile` >/dev/null 2>&1; then ps_alive=1; fi
+ 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 [ "$2" = "warn" ]; then
+ /bin/echo -e "$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')
+ # check for config file
+ if [ ! -r $CONF ]; then
+ /bin/echo -e "\nWARNING: $CONF cannot be read. See README.Debian."
+ fi
+ # check for /var/run/mysqld/ which maybe have only been on a tempfs
+ if [ ! -d $RUNDIR ]; then
+ install --directory --owner=mysql --mode=755 $RUNDIR
+ fi
+ # Start daemon
+ echo -n "Starting MySQL database server: mysqld"
+ if mysqld_status check_alive nowarn; then
+ echo "...already running."
+ else
+ /usr/bin/mysqld_safe > /dev/null 2>&1 &
+ for i in 1 2 3 4 5 6; do
+ sleep 1
+ if mysqld_status check_alive nowarn ; then break; fi
+ done
+ if mysqld_status check_alive warn; then
+ echo "."
+ # Now start mysqlcheck or whatever the admin wants.
+ /etc/mysql/debian-start
+ else
+ echo "...failed."
+ /bin/echo -e "\tPlease take a look at the syslog."
+ fi
+ fi
+
+ if $MYADMIN variables | egrep -q have_bdb.*YES; then
+ /bin/echo "BerkeleyDB is obsolete, see /usr/share/doc/mysql-server/README.Debian.gz" | $ERR_LOGGER -p daemon.info
+ fi
+
+ ;;
+
+ 'stop')
+ # * As a passwordless mysqladmin (e.g. via ~/.my.cnf) must be possible
+ # at least for cron, we can rely on it here, too. (although we have
+ # to specify it explicit as e.g. sudo environments points to the normal
+ # users home and not /root)
+ echo -n "Stopping MySQL database server: mysqld"
+ if ! mysqld_status check_dead nowarn; then
+ set +e
+ shutdown_out=`$MYADMIN shutdown 2>&1`; r=$?
+ set -e
+ if [ "$r" -ne 0 ]; then
+ /bin/echo -e -n "...failed.\n$shutdown_out\nKilling MySQL database server by signal: mysqld"
+ killall -15 mysqld
+ server_down=
+ for i in 1 2 3 4 5 6 7 8 9 10; do
+ sleep 1
+ if mysqld_status check_dead nowarn; then server_down=1; break; fi
+ done
+ if test -z "$server_down"; then killall -9 mysqld; fi
+ fi
+ fi
+
+ if ! mysqld_status check_dead warn; then
+ echo "...failed."
+ echo "Please stop MySQL manually and read /usr/share/doc/mysql-server/README.Debian!"
+ exit -1
+ else
+ echo "."
+ fi
+ ;;
+
+ 'restart')
+ set +e; $SELF stop; set -e
+ $SELF start
+ ;;
+
+ 'reload'|'force-reload')
+ echo -n "Reloading MySQL database server: mysqld"
+ $MYADMIN reload
+ echo "."
+ ;;
+
+ 'status')
+ if mysqld_status check_alive nowarn; then
+ $MYADMIN version
+ else
+ echo "MySQL is stopped."
+ fi
+ ;;
+
+ *)
+ echo "Usage: $SELF start|stop|restart|reload|force-reload"
+ exit 1
+ ;;
+esac
+