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Diffstat (limited to 'debian/mysql-server-5.5.mysql.init')
| -rw-r--r-- | debian/mysql-server-5.5.mysql.init | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/debian/mysql-server-5.5.mysql.init b/debian/mysql-server-5.5.mysql.init new file mode 100644 index 0000000..d76676e --- /dev/null +++ b/debian/mysql-server-5.5.mysql.init @@ -0,0 +1,187 @@ +#!/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 /run/mysqld || install -m 755 -o mysql -g root -d /run/mysqld + + # Start MySQL! + /usr/bin/mysqld_safe > /dev/null 2>&1 & + + # 6s was reported in #352070 to be too few when using ndbcluster + for i in 1 2 3 4 5 6 7 8 9 10 11 12 13 14; 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-5.5/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 + |