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Diffstat (limited to 'scripts/safe_mysqld.sh')
| -rwxr-xr-x | scripts/safe_mysqld.sh | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/scripts/safe_mysqld.sh b/scripts/safe_mysqld.sh new file mode 100755 index 00000000000..b2965bced90 --- /dev/null +++ b/scripts/safe_mysqld.sh @@ -0,0 +1,188 @@ +#!/bin/sh +# Copyright Abandoned 1996 TCX DataKonsult AB & Monty Program KB & Detron HB +# This file is public domain and comes with NO WARRANTY of any kind +# +# scripts to start the MySQL daemon and restart it if it dies unexpectedly +# +# This should be executed in the MySQL base directory if you are using a +# binary installation that has other paths than you are using. +# +# mysql.server works by first doing a cd to the base directory and from there +# executing safe_mysqld + +trap '' 1 2 3 15 # we shouldn't let anyone kill us + +defaults= +case "$1" in + --no-defaults|--defaults-file=*) + defaults="$1"; shift + ;; +esac + +# Parse arguments to see if caller wants the pid_file somewhere else. +parse_arguments() { + for arg; do + case $arg in + --datadir=*) DATADIR=`echo "$arg" | sed -e "s;--datadir=;;"` ;; + --pid-file=*) pid_file=`echo "$arg" | sed -e "s;--pid-file=;;"` ;; + --socket=*) MYSQL_UNIX_PORT=`echo "$arg" | sed -e "s;--socket=;;"` ;; + --log=*) log=`echo "$arg" | sed -e "s;--log=;;"` ;; + --err-log=*) err_log=`echo "$arg" | sed -e "s;--err-log=;;"` ;; + --basedir=*) MY_BASEDIR_VERSION=`echo "$arg" | sed -e "s;--basedir=;;"` ;; + --ledir=*) ledir=`echo "$arg" | sed -e "s;--ledir=;;"` ;; + --user=*) user=`echo "$arg" | sed -e "s;--user=;;"` ;; + esac + done +} + +MY_PWD=`pwd` +# Check if we are starting this relative (for the binary release) +if test -d $MY_PWD/data/mysql -a -f ./share/mysql/english/errmsg.sys -a \ + -x ./bin/mysqld +then + MY_BASEDIR_VERSION=$MY_PWD # Where bin, share and data are + ledir=$MY_BASEDIR_VERSION/bin # Where mysqld is + DATADIR=$MY_BASEDIR_VERSION/data +# Check if this is a 'moved install directory' +elif test -f ./var/mysql/db.frm -a -f ./share/mysql/english/errmsg.sys -a \ + -x ./libexec/mysqld +then + MY_BASEDIR_VERSION=$MY_PWD # Where libexec, share and var are + ledir=$MY_BASEDIR_VERSION/libexec # Where mysqld is + DATADIR=$MY_BASEDIR_VERSION/var +else + MY_BASEDIR_VERSION=@prefix@ + DATADIR=@localstatedir@ + ledir=@libexecdir@ +fi + +pid_file=$DATADIR/`/bin/hostname`.pid +MYSQL_UNIX_PORT=@MYSQL_UNIX_ADDR@ +MYSQL_TCP_PORT=@MYSQL_TCP_PORT@ +log=$DATADIR/`/bin/hostname`.log +err_log=$DATADIR/`/bin/hostname`.err +user=@MYSQLD_USER@ + +# Get first arguments from the my.cfg file, groups [mysqld] and [safe_mysqld] +# and then merge with the command line arguments +if test -x ./bin/my_print_defaults; then + print_defaults="./bin/my_print_defaults" +elif test -x @bindir@/my_print_defaults; then + print_defaults="@bindir@/my_print_defaults" +elif test -x @bindir@/mysql_print_defaults; then + print_defaults="@bindir@/mysql_print_defaults" +else + print_defaults="my_print_defaults" +fi +parse_arguments `$print_defaults $defaults mysqld safe_mysqld` +parse_arguments "$@" + +if test ! -x $ledir/mysqld +then + echo "The file $ledir/mysqld doesn't exist or is not executable" + echo "Please do a cd to the mysql installation directory and restart" + echo "this script from there as follows:" + echo "./bin/safe_mysqld". + exit 1; +fi + + +NOHUP_NICENESS=`nohup nice` +if [ "x$NOHUP_NICENESS" = "x0" ] || ! nice --1 nice >/dev/null 2>&1 ; then + NOHUP_NICENESS="nohup" +else + NOHUP_NICENESS="nice --$NOHUP_NICENESS nohup" +fi + + +export MYSQL_UNIX_PORT +#export MYSQL_TCP_PORT +touch $err_log; chown $user $err_log + +# +# If there exists an old pid file, check if the daemon is already running +# Note: The switches to 'ps' may depend on your operating system +if test -f $pid_file +then + PID=`cat $pid_file` + if @CHECK_PID@ + then + if @FIND_PROC@ + then # The pid contains a mysqld process + echo "A mysqld process already exists" + echo "A mysqld process already exists at " `date` >> $err_log + exit 1; + fi + fi + rm -f $pid_file + if test -f $pid_file + then + echo "Fatal error: Can't remove the pid file: $pid_file" + echo "Fatal error: Can't remove the pid file: $pid_file at " `date` >> $err_log + echo "Please remove it manually and start $0 again" + echo "mysqld daemon not started" + exit 1; + fi +fi + +# +# Uncomment the following lines if you want all tables to be automaticly +# checked and repaired at start +# +# echo "Checking tables in $DATADIR" +# $MY_BASEDIR_VERSION/bin/myisamchk --silent --force --fast --medium-check $DATADIR/*/*.MYI +# $MY_BASEDIR_VERSION/bin/isamchk --silent --force $DATADIR/*/*.ISM + +echo "Starting mysqld daemon with databases from $DATADIR" + +# Does this work on all systems? +#if type ulimit | grep "shell builtin" > /dev/null +#then +# ulimit -n 256 > /dev/null 2>&1 # Fix for BSD and FreeBSD systems +#fi + +echo "`date +'%y%m%d %H:%M:%S mysqld started'`" >> $err_log +while true +do + rm -f $MYSQL_UNIX_PORT $pid_file # Some extra safety + if test "$#" -eq 0 + then + (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 ) + else + (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 ) + fi + if test ! -f $pid_file # This is removed if normal shutdown + then + break; + fi + if @IS_LINUX@ + then + # Test if one process was hanging. + # This is only a fix for Linux (running as base 3 mysqld processes) + # but should work for the rest of the servers. + # The only thing is ps x => redhat 5 gives warnings when using ps -x. + # kill -9 is used or the process won't react on the kill. + numofproces=`ps xa | grep -v "grep" | grep -c $ledir/mysqld` + echo -e "\nNumber of processes running now: $numofproces" | tee -a $err_log + I=1 + while test "$I" -le "$numofproces" + do + PROC=`ps xa | grep $ledir/mysqld | grep -v "grep" | tail -1` + for T in $PROC + do + break + done + # echo "TEST $I - $T **" + if kill -9 $T + then + echo "mysqld process hanging, pid $T - killed" | tee -a $err_log + else + break + fi + I=`expr $I + 1` + done + fi + echo "`date +'%y%m%d %H:%M:%S mysqld restarted'`" | tee -a $err_log +done + +echo -e "`date +'%y%m%d %H:%M:%S mysqld ended\n'`" | tee -a $err_log |