MySQL启动脚本改装，支持多配置文件

#!/bin/sh
#CopyrightAbandoned1996TCXDataKonsultAB&MontyProgramKB&DetronHB
#ThisfileispublicdomainandcomeswithNOWARRANTYofanykind
####################
##Modifybyskyoo61@gmail.com
##2012-03-26
####################
#MySQLdaemonstart/stopscript.

#Usuallythisisputin/etc/init.d(atleastonmachinesSYSVR4based
#systems)andlinkedto/etc/rc3.d/S99mysqland/etc/rc0.d/K01mysql.
#Whenthisisdonethemysqlserverwillbestartedwhenthemachineis
#startedandshutdownwhenthesystemsgoesdown.

#CommentstosupportchkconfigonRedHatLinux
#chkconfig:23456436
#description:AveryfastandreliableSQLdatabaseengine.

#CommentstosupportLSBinitscriptconventions
###BEGININITINFO
#Provides:mysql
#Required-Start:$local_fs$network$remote_fs
#Should-Start:ypbindnscdldapntpdxntpd
#Required-Stop:$local_fs$network$remote_fs
#Default-Start:2345
#Default-Stop:016
#Short-Description:startandstopMySQL
#Description:MySQLisaveryfastandreliableSQLdatabaseengine.
###ENDINITINFO

#IfyouinstallMySQLonsomeotherplacesthan/usr/local/mysql,thenyou
#havetodooneofthefollowingthingsforthisscripttowork:
#
#-RunthisscriptfromwithintheMySQLinstallationdirectory
#-Createa/etc/my.cnffilewiththefollowinginformation:
#[mysqld]
#basedir=<path-to-mysql-installation-directory>
#-Addtheabovetoanyotherconfigurationfile(forexample~/.my.ini)
#andcopymy_print_defaultsto/usr/bin
#-Addthepathtothemysql-installation-directorytothebasedirvariable
#below.
#
#IfyouwanttoaffectotherMySQLvariables,youshouldmakeyourchanges
#inthe/etc/my.cnf,~/.my.cnforotherMySQLconfigurationfiles.

#Ifyouchangebasedir,youmustalsochangedatadir.Thesemayget
#overwrittenbysettingsintheMySQLconfigurationfiles.

basedir=
datadir=
config_file='/etc/my.cnf'

#Defaultvalue,inseconds,afterwhichthescriptshouldtimeoutwaiting
#forserverstart.
#Valuehereisoverridenbyvalueinmy.cnf.
#0meansdon'twaitatall
#Negativenumbersmeantowaitindefinitely
service_startup_timeout=900

#LockdirectoryforRedHat/SuSE.
lockdir='/var/lock/subsys'
lock_file_path="$lockdir/mysql"

#Thefollowingvariablesareonlysetforlettingmysql.serverfindthings.

#Setsomedefaults
mysqld_pid_file_path=
iftest-z"$basedir"
then
basedir=/usr/local/mysql
bindir=/usr/local/mysql/bin
iftest-z"$datadir"
then
datadir=/data/mysql
fi
sbindir=/usr/local/mysql/bin
libexecdir=/usr/local/mysql/bin
else
bindir="$basedir/bin"
iftest-z"$datadir"
then
datadir="$basedir/data"
fi
sbindir="$basedir/sbin"
libexecdir="$basedir/libexec"
fi

#datadir_setisusedtodetermineifdatadirwasset(andsoshouldbe
#*not*setinsideofthe--basedir=handler.)
datadir_set=

#
#UseLSBinitscriptfunctionsforprintingmessages,ifpossible
#
lsb_functions="/lib/lsb/init-functions"
iftest-f$lsb_functions;then
.$lsb_functions
else
log_success_msg()
{
echo"SUCCESS!$@"
}
log_failure_msg()
{
echo"ERROR!$@"
}
fi

PATH="/sbin:/usr/sbin:/bin:/usr/bin:$basedir/bin"
exportPATH

mode=$1#startorstop
server=$2#defaultmy,configfilenamenotsuffix,defaultsuffix".cnf"

[$#-ge2]&&shift&&shift
[$#-ge1]&&shift

other_args="$*"#uncommon,butneededwhencalledfromanRPMupgradeaction
#Expected:"--skip-networking--skip-grant-tables"
#Theyarenotcheckedhere,intentionally,asitistheresposibility
#ofthe"spec"fileauthortogivecorrectargumentsonly.

case`echo"testing\c"`,`echo-ntesting`in
*c*,-n*)echo_n=echo_c=;;
*c*,*)echo_n=-necho_c=;;
*)echo_n=echo_c='\c';;
esac

parse_server_arguments(){
forargdo
case"$arg"in
--basedir=*)basedir=`echo"$arg"|sed-e's/^[^=]*=//'`
bindir="$basedir/bin"
iftest-z"$datadir_set";then
datadir="$basedir/data"
fi
sbindir="$basedir/sbin"
libexecdir="$basedir/libexec"
;;
--datadir=*)datadir=`echo"$arg"|sed-e's/^[^=]*=//'`
datadir_set=1
;;
--pid-file=*)mysqld_pid_file_path=`echo"$arg"|sed-e's/^[^=]*=//'`;;
--service-startup-timeout=*)service_startup_timeout=`echo"$arg"|sed-e's/^[^=]*=//'`;;
--port=*)port=`echo"$arg"|sed-e's/^[^=]*=//'`;;
--log-error=*)log_error_path=`echo"$arg"|sed-e's/^[^=]*=//'`;;
--server-id=*)server_id=`echo"$arg"|sed-e's/^[^=]*=//'`;;
--socket=*)socket=`echo"$arg"|sed-e's/^[^=]*=//'`;;
esac
done
}

wait_for_pid(){
verb="$1"#created|removed
pid="$2"#processIDoftheprogramoperatingonthepid-file
pid_file_path="$3"#pathtothePIDfile.

i=0
avoid_race_condition="bycheckingagain"

whiletest$i-ne$service_startup_timeout;do

case"$verb"in
'created')
#waitforaPID-filetopopintoexistence.
test-s"$pid_file_path"&&i=''&&break
;;
'removed')
#waitforthisPID-filetodisappear
test!-s"$pid_file_path"&&i=''&&break
;;
*)
echo"wait_for_pid()usage:wait_for_pidcreated|removedpidpid_file_path"
exit1
;;
esac

#ifserverisn'trunning,thenpid-filewillneverbeupdated
iftest-n"$pid";then
ifkill-0"$pid"2>/dev/null;then
:#theserverstillruns
else
#Theservermayhaveexitedbetweenthelastpid-filecheckandnow.
iftest-n"$avoid_race_condition";then
avoid_race_condition=""
continue#Checkagain.
fi

#there'snothingthatwillaffectthefile.
log_failure_msg"TheserverquitwithoutupdatingPIDfile($pid_file_path)."
return1#notwaitinganymore.
fi
fi

echo$echo_n".$echo_c"
i=`expr$i+1`
sleep1

done

iftest-z"$i";then
log_success_msg
return0
else
log_failure_msg
return1
fi
}

get_cnf_file(){
cfg_name=$1
if[-n$cfg_name];then
cfg_file="/etc/$cfg_name.cnf"
cfg_file2="/etc/$cfg_name.cfg"
cfg_file3="$basedir/$cfg_name.cnf"
cfg_file4="$basedir/$cfg_name.cfg"
cfg_file5="$basedir/etc/$cfg_name.cnf"
cfg_file6="$basedir/etc/$cfg_name.cfg"
if[-f$cfg_file];then
config_file=$cfg_file
elif[-f$cfg_file2];then
config_file=$cfg_file2
elif[-f$cfg_file3];then
config_file=$cfg_file3
elif[-f$cfg_file4];then
config_file=$cfg_file4
elif[-f$cfg_file5];then
config_file=$cfg_file5
elif[-f$cfg_file6];then
config_file=$cfg_file6
fi
fi
}

#Getargumentsfromthemy.cnffile,
#theonlygroup,whichisreadfromnowonis[mysqld]
iftest-x./bin/my_print_defaults
then
print_defaults="./bin/my_print_defaults"
eliftest-x$bindir/my_print_defaults
then
print_defaults="$bindir/my_print_defaults"
eliftest-x$bindir/mysql_print_defaults
then
print_defaults="$bindir/mysql_print_defaults"
else
#Trytofindbasedirin/etc/my.cnf
conf=/etc/my.cnf
print_defaults=
iftest-r$conf
then
subpat='^[^=]*basedir[^=]*=\(.*\)$'
dirs=`sed-e"/$subpat/!d"-e's//\1/'$conf`
fordin$dirs
do
d=`echo$d|sed-e's/[]//g'`
iftest-x"$d/bin/my_print_defaults"
then
print_defaults="$d/bin/my_print_defaults"
break
fi
iftest-x"$d/bin/mysql_print_defaults"
then
print_defaults="$d/bin/mysql_print_defaults"
break
fi
done
fi

#Hopeit'sinthePATH...butIdoubtit
test-z"$print_defaults"&&print_defaults="my_print_defaults"
fi

#
#Readdefaultsfilefrom'basedir'.Ifthereisnodefaultsfilethere
#checkifit'sintheold(depricated)place(datadir)andreaditfromthere
#

extra_args=""
iftest-r"$basedir/my.cnf"
then
extra_args="-e$basedir/my.cnf"
else
iftest-r"$datadir/my.cnf"
then
extra_args="-e$datadir/my.cnf"
fi
fi

if[-n$server]
then
get_cnf_file$server
extra_args="-c$config_file"
lock_file_path="$lockdir/$server"
fi

parse_server_arguments`$print_defaults$extra_argsmysqldservermysql_servermysql.server`

#
#Setpidfileifnotgiven
#
iftest-z"$mysqld_pid_file_path"
then
mysqld_pid_file_path=$datadir/`hostname`.pid
else
case"$mysqld_pid_file_path"in
/*);;
*)mysqld_pid_file_path="$datadir/$mysqld_pid_file_path";;
esac
fi

case"$mode"in
'start')
#Startdaemon

#Safeguard(relativepaths,coredumps..)
cd$basedir

echo$echo_n"StartingMySQL"
iftest-x$bindir/mysqld_safe
then
#Giveextraargumentstomysqldwiththemy.cnffile.Thisscript
#maybeoverwrittenatnextupgrade.
if[-n$server];then
$bindir/mysqld_safe--defaults-file="$config_file"--pid-file="$mysqld_pid_file_path"$other_args>/dev/null2>&1&
else
$bindir/mysqld_safe--datadir="$datadir"--pid-file="$mysqld_pid_file_path"$other_args>/dev/null2>&1&
fi
wait_for_pidcreated"$!""$mysqld_pid_file_path";return_value=$?

#MakelockforRedHat/SuSE
iftest-w"$lockdir"
then
touch"$lock_file_path"
fi

exit$return_value
else
log_failure_msg"Couldn'tfindMySQLserver($bindir/mysqld_safe)"
fi
;;

'stop')
#Stopdaemon.Weuseasignalheretoavoidhavingtoknowthe
#rootpassword.

iftest-s"$mysqld_pid_file_path"
then
mysqld_pid=`cat"$mysqld_pid_file_path"`

if(kill-0$mysqld_pid2>/dev/null)
then
echo$echo_n"ShuttingdownMySQL"
kill$mysqld_pid
#mysqldshouldremovethepidfilewhenitexits,sowaitforit.
wait_for_pidremoved"$mysqld_pid""$mysqld_pid_file_path";return_value=$?
else
log_failure_msg"MySQLserverprocess#$mysqld_pidisnotrunning!"
rm"$mysqld_pid_file_path"
fi

#DeletelockforRedHat/SuSE
iftest-f"$lock_file_path"
then
rm-f"$lock_file_path"
fi
exit$return_value
else
log_failure_msg"MySQLserverPIDfilecouldnotbefound!"
fi
;;

'restart')
#Stoptheserviceandregardlessofwhetheritwas
#runningornot,startitagain.
if$0stop$other_args;then
$0start$other_args
else
log_failure_msg"Failedtostoprunningserver,sorefusingtotrytostart."
exit1
fi
;;

'reload'|'force-reload')
iftest-s"$mysqld_pid_file_path";then
readmysqld_pid<"$mysqld_pid_file_path"
kill-HUP$mysqld_pid&&log_success_msg"ReloadingserviceMySQL"
touch"$mysqld_pid_file_path"
else
log_failure_msg"MySQLPIDfilecouldnotbefound!"
exit1
fi
;;
'status')
#First,checktoseeifpidfileexists
iftest-s"$mysqld_pid_file_path";then
readmysqld_pid<"$mysqld_pid_file_path"
ifkill-0$mysqld_pid2>/dev/null;then
log_success_msg"MySQLrunning($mysqld_pid)"
exit0
else
log_failure_msg"MySQLisnotrunning,butPIDfileexists"
exit1
fi
else
#Trytofindappropriatemysqldprocess
mysqld_pid=`pidof$libexecdir/mysqld`
iftest-z$mysqld_pid;then
iftest-f"$lock_file_path";then
log_failure_msg"MySQLisnotrunning,butlockfile($lock_file_path)exists"
exit2
fi
log_failure_msg"MySQLisnotrunning"
exit3
else
log_failure_msg"MySQLisrunningbutPIDfilecouldnotbefound"
exit4
fi
fi
;;
*)
#usage
basename=`basename"$0"`
echo"Usage:$basename{start|stop|restart|reload|force-reload|status}[configname.\"my.cnf\"example\"my\"(defaultmy)][MySQLserveroptions]"
exit1
;;
esac

exit0

转自：/article/5536675.html