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Import changeset
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bk@work.mysql.com
188
scripts/safe_mysqld.sh
Executable file
188
scripts/safe_mysqld.sh
Executable file
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#!/bin/sh
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# Copyright Abandoned 1996 TCX DataKonsult AB & Monty Program KB & Detron HB
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# This file is public domain and comes with NO WARRANTY of any kind
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#
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# scripts to start the MySQL daemon and restart it if it dies unexpectedly
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#
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# This should be executed in the MySQL base directory if you are using a
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# binary installation that has other paths than you are using.
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#
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# mysql.server works by first doing a cd to the base directory and from there
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# executing safe_mysqld
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trap '' 1 2 3 15 # we shouldn't let anyone kill us
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defaults=
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case "$1" in
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--no-defaults|--defaults-file=*)
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defaults="$1"; shift
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;;
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esac
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# Parse arguments to see if caller wants the pid_file somewhere else.
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parse_arguments() {
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for arg; do
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case $arg in
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--datadir=*) DATADIR=`echo "$arg" | sed -e "s;--datadir=;;"` ;;
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--pid-file=*) pid_file=`echo "$arg" | sed -e "s;--pid-file=;;"` ;;
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--socket=*) MYSQL_UNIX_PORT=`echo "$arg" | sed -e "s;--socket=;;"` ;;
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--log=*) log=`echo "$arg" | sed -e "s;--log=;;"` ;;
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--err-log=*) err_log=`echo "$arg" | sed -e "s;--err-log=;;"` ;;
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--basedir=*) MY_BASEDIR_VERSION=`echo "$arg" | sed -e "s;--basedir=;;"` ;;
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--ledir=*) ledir=`echo "$arg" | sed -e "s;--ledir=;;"` ;;
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--user=*) user=`echo "$arg" | sed -e "s;--user=;;"` ;;
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esac
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done
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}
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MY_PWD=`pwd`
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# Check if we are starting this relative (for the binary release)
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if test -d $MY_PWD/data/mysql -a -f ./share/mysql/english/errmsg.sys -a \
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-x ./bin/mysqld
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then
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MY_BASEDIR_VERSION=$MY_PWD # Where bin, share and data are
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ledir=$MY_BASEDIR_VERSION/bin # Where mysqld is
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DATADIR=$MY_BASEDIR_VERSION/data
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# Check if this is a 'moved install directory'
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elif test -f ./var/mysql/db.frm -a -f ./share/mysql/english/errmsg.sys -a \
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-x ./libexec/mysqld
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then
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MY_BASEDIR_VERSION=$MY_PWD # Where libexec, share and var are
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ledir=$MY_BASEDIR_VERSION/libexec # Where mysqld is
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DATADIR=$MY_BASEDIR_VERSION/var
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else
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MY_BASEDIR_VERSION=@prefix@
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DATADIR=@localstatedir@
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ledir=@libexecdir@
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fi
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pid_file=$DATADIR/`/bin/hostname`.pid
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MYSQL_UNIX_PORT=@MYSQL_UNIX_ADDR@
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MYSQL_TCP_PORT=@MYSQL_TCP_PORT@
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log=$DATADIR/`/bin/hostname`.log
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err_log=$DATADIR/`/bin/hostname`.err
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user=@MYSQLD_USER@
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# Get first arguments from the my.cfg file, groups [mysqld] and [safe_mysqld]
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# and then merge with the command line arguments
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if test -x ./bin/my_print_defaults; then
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print_defaults="./bin/my_print_defaults"
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elif test -x @bindir@/my_print_defaults; then
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print_defaults="@bindir@/my_print_defaults"
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elif test -x @bindir@/mysql_print_defaults; then
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print_defaults="@bindir@/mysql_print_defaults"
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else
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print_defaults="my_print_defaults"
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fi
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parse_arguments `$print_defaults $defaults mysqld safe_mysqld`
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parse_arguments "$@"
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if test ! -x $ledir/mysqld
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then
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echo "The file $ledir/mysqld doesn't exist or is not executable"
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echo "Please do a cd to the mysql installation directory and restart"
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echo "this script from there as follows:"
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echo "./bin/safe_mysqld".
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exit 1;
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fi
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NOHUP_NICENESS=`nohup nice`
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if [ "x$NOHUP_NICENESS" = "x0" ] || ! nice --1 nice >/dev/null 2>&1 ; then
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NOHUP_NICENESS="nohup"
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else
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NOHUP_NICENESS="nice --$NOHUP_NICENESS nohup"
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fi
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export MYSQL_UNIX_PORT
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#export MYSQL_TCP_PORT
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touch $err_log; chown $user $err_log
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#
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# If there exists an old pid file, check if the daemon is already running
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# Note: The switches to 'ps' may depend on your operating system
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if test -f $pid_file
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then
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PID=`cat $pid_file`
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if @CHECK_PID@
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then
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if @FIND_PROC@
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then # The pid contains a mysqld process
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echo "A mysqld process already exists"
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echo "A mysqld process already exists at " `date` >> $err_log
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exit 1;
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fi
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fi
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rm -f $pid_file
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if test -f $pid_file
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then
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echo "Fatal error: Can't remove the pid file: $pid_file"
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echo "Fatal error: Can't remove the pid file: $pid_file at " `date` >> $err_log
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echo "Please remove it manually and start $0 again"
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echo "mysqld daemon not started"
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exit 1;
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fi
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fi
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#
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# Uncomment the following lines if you want all tables to be automaticly
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# checked and repaired at start
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#
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# echo "Checking tables in $DATADIR"
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# $MY_BASEDIR_VERSION/bin/myisamchk --silent --force --fast --medium-check $DATADIR/*/*.MYI
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# $MY_BASEDIR_VERSION/bin/isamchk --silent --force $DATADIR/*/*.ISM
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echo "Starting mysqld daemon with databases from $DATADIR"
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# Does this work on all systems?
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#if type ulimit | grep "shell builtin" > /dev/null
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#then
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# ulimit -n 256 > /dev/null 2>&1 # Fix for BSD and FreeBSD systems
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#fi
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echo "`date +'%y%m%d %H:%M:%S mysqld started'`" >> $err_log
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while true
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do
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rm -f $MYSQL_UNIX_PORT $pid_file # Some extra safety
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if test "$#" -eq 0
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then
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(trap "" 1 ; exec $NOHUP_NICENESS $ledir/mysqld --basedir=$MY_BASEDIR_VERSION --datadir=$DATADIR --user=$user --pid-file=$pid_file @MYSQLD_DEFAULT_SWITCHES@ >> $err_log 2>&1 )
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else
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(trap "" ; exec $NOHUP_NICENESS $ledir/mysqld --basedir=$MY_BASEDIR_VERSION --datadir=$DATADIR --user=$user --pid-file=$pid_file @MYSQLD_DEFAULT_SWITCHES@ "$@" >> $err_log 2>&1 )
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fi
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if test ! -f $pid_file # This is removed if normal shutdown
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then
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break;
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fi
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if @IS_LINUX@
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then
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# Test if one process was hanging.
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# This is only a fix for Linux (running as base 3 mysqld processes)
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# but should work for the rest of the servers.
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# The only thing is ps x => redhat 5 gives warnings when using ps -x.
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# kill -9 is used or the process won't react on the kill.
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numofproces=`ps xa | grep -v "grep" | grep -c $ledir/mysqld`
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echo -e "\nNumber of processes running now: $numofproces" | tee -a $err_log
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I=1
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while test "$I" -le "$numofproces"
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do
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PROC=`ps xa | grep $ledir/mysqld | grep -v "grep" | tail -1`
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for T in $PROC
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do
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break
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done
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# echo "TEST $I - $T **"
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if kill -9 $T
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then
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echo "mysqld process hanging, pid $T - killed" | tee -a $err_log
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else
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break
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fi
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I=`expr $I + 1`
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done
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fi
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echo "`date +'%y%m%d %H:%M:%S mysqld restarted'`" | tee -a $err_log
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done
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echo -e "`date +'%y%m%d %H:%M:%S mysqld ended\n'`" | tee -a $err_log
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