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mariadb/scripts/mysqld_safe.sh
tim@siva.hindu.god 8a77c6f741 scripts/mysqld_safe.sh 
Only add --defaults-extra-file=$DATADIR/my.cnf if $DATADIR/my.cnf is readable.
2005-05-27 12:44:06 +12:00

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#!/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 mysqld_safe
KILL_MYSQLD=1;
trap '' 1 2 3 15 # we shouldn't let anyone kill us
umask 007
defaults=
case "$1" in
--no-defaults|--defaults-file=*|--defaults-extra-file=*)
defaults="$1"; shift
;;
esac
usage () {
cat <<EOF
Usage: $0 [OPTIONS]
--no-defaults Don't read the system defaults file
--defaults-file=FILE Use the specified defaults file
--defaults-extra-file=FILE Also use defaults from the specified file
--ledir=DIRECTORY Look for mysqld in the specified directory
--log-error=FILE Log errors to the specified log file
--open-files-limit=LIMIT Limit the number of open files
--core-file-size=LIMIT Limit core files to the specified size
--timezone=TZ Set the system timezone
--mysqld=FILE Use the specified file as mysqld
--mysqld-version=VERSION Use "mysqld-VERSION" as mysqld
--nice=NICE Set the scheduling priority of mysqld
--skip-kill-mysqld Don't try to kill stray mysqld processes
All other options are passed to the mysqld program.
EOF
exit 1
}
parse_arguments() {
# We only need to pass arguments through to the server if we don't
# handle them here. So, we collect unrecognized options (passed on
# the command line) into the args variable.
pick_args=
if test "$1" = PICK-ARGS-FROM-ARGV
then
pick_args=1
shift
fi
for arg do
case "$arg" in
--skip-kill-mysqld*)
KILL_MYSQLD=0;
;;
# these get passed explicitly to mysqld
--basedir=*) MY_BASEDIR_VERSION=`echo "$arg" | sed -e "s;--basedir=;;"` ;;
--datadir=*) DATADIR=`echo "$arg" | sed -e "s;--datadir=;;"` ;;
--pid-file=*) pid_file=`echo "$arg" | sed -e "s;--pid-file=;;"` ;;
--user=*) user=`echo "$arg" | sed -e "s;--[^=]*=;;"` ; SET_USER=1 ;;
# these two might have been set in a [mysqld_safe] section of my.cnf
# they are added to mysqld command line to override settings from my.cnf
--socket=*) mysql_unix_port=`echo "$arg" | sed -e "s;--socket=;;"` ;;
--port=*) mysql_tcp_port=`echo "$arg" | sed -e "s;--port=;;"` ;;
# mysqld_safe-specific options - must be set in my.cnf ([mysqld_safe])!
--ledir=*) ledir=`echo "$arg" | sed -e "s;--ledir=;;"` ;;
--log-error=*) err_log=`echo "$arg" | sed -e "s;--log-error=;;"` ;;
--open-files-limit=*) open_files=`echo "$arg" | sed -e "s;--open-files-limit=;;"` ;;
--core-file-size=*) core_file_size=`echo "$arg" | sed -e "s;--core-file-size=;;"` ;;
--timezone=*) TZ=`echo "$arg" | sed -e "s;--timezone=;;"` ; export TZ; ;;
--mysqld=*) MYSQLD=`echo "$arg" | sed -e "s;--mysqld=;;"` ;;
--mysqld-version=*)
tmp=`echo "$arg" | sed -e "s;--mysqld-version=;;"`
if test -n "$tmp"
then
MYSQLD="mysqld-$tmp"
else
MYSQLD="mysqld"
fi
;;
--nice=*) niceness=`echo "$arg" | sed -e "s;--nice=;;"` ;;
--help)
usage
;;
*)
if test -n "$pick_args"
then
# This sed command makes sure that any special chars are quoted,
# so the arg gets passed exactly to the server.
args="$args "`echo "$arg" | sed -e 's,\([^a-zA-Z0-9_.-]\),\\\\\1,g'`
fi
;;
esac
done
}
MY_PWD=`pwd`
# Check if we are starting this relative (for the binary release)
if test -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=$MY_BASEDIR_VERSION/data
if test -z "$defaults" -a -r "$DATADIR/my.cnf"
then
defaults="--defaults-extra-file=$DATADIR/my.cnf"
fi
# Check if this is a 'moved install directory'
elif test -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=$MY_BASEDIR_VERSION/var
else
MY_BASEDIR_VERSION=@prefix@
DATADIR=@localstatedir@
ledir=@libexecdir@
fi
if test -z "$MYSQL_HOME"
then
if test -r "$MY_BASEDIR_VERSION/my.cnf" && test -r "$DATADIR/my.cnf"
then
echo "WARNING: Found two instances of my.cnf -"
echo "$MY_BASEDIR_VERSION/my.cnf and"
echo "$DATADIR/my.cnf"
echo "IGNORING $DATADIR/my.cnf"
echo
MYSQL_HOME=$MY_BASEDIR_VERSION
elif test -r "$DATADIR/my.cnf"
then
echo "WARNING: Found $DATADIR/my.cnf"
echo "Datadir is deprecated place for my.cnf, please move it to $MY_BASEDIR_VERSION"
echo
MYSQL_HOME=$DATADIR
else
MYSQL_HOME=$MY_BASEDIR_VERSION
fi
fi
export MYSQL_HOME
user=@MYSQLD_USER@
niceness=0
# Use the mysqld-max binary by default if the user doesn't specify a binary
if test -x $ledir/mysqld-max
then
MYSQLD=mysqld-max
else
MYSQLD=mysqld
fi
# these rely on $DATADIR by default, so we'll set them later on
pid_file=
err_log=
# Get first arguments from the my.cnf file, groups [mysqld] and [mysqld_safe]
# and then merge with the command line arguments
if test -x ./bin/my_print_defaults
then
print_defaults="./bin/my_print_defaults"
elif test -x @bindir@/my_print_defaults
then
print_defaults="@bindir@/my_print_defaults"
elif test -x @bindir@/mysql_print_defaults
then
print_defaults="@bindir@/mysql_print_defaults"
else
print_defaults="my_print_defaults"
fi
args=
SET_USER=2
parse_arguments `$print_defaults $defaults --loose-verbose mysqld server`
if test $SET_USER -eq 2
then
SET_USER=0
fi
parse_arguments `$print_defaults $defaults --loose-verbose mysqld_safe safe_mysqld`
parse_arguments PICK-ARGS-FROM-ARGV "$@"
safe_mysql_unix_port=${mysql_unix_port:-${MYSQL_UNIX_PORT:-@MYSQL_UNIX_ADDR@}}
# Make sure that directory for $safe_mysql_unix_port exists
mysql_unix_port_dir=`dirname $safe_mysql_unix_port`
if [ ! -d $mysql_unix_port_dir ]
then
mkdir $mysql_unix_port_dir
chown $user $mysql_unix_port_dir
fi
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/mysqld_safe".
echo "See http://dev.mysql.com/doc/mysql/en/mysqld_safe.html for more"
echo "information"
exit 1
fi
if test -z "$pid_file"
then
pid_file=$DATADIR/`@HOSTNAME@`.pid
else
case "$pid_file" in
/* ) ;;
* ) pid_file="$DATADIR/$pid_file" ;;
esac
fi
test -z "$err_log" && err_log=$DATADIR/`@HOSTNAME@`.err
if test -n "$mysql_unix_port"
then
args="--socket=$mysql_unix_port $args"
fi
if test -n "$mysql_tcp_port"
then
args="--port=$mysql_tcp_port $args"
fi
if test $niceness -eq 0
then
NOHUP_NICENESS="nohup"
else
NOHUP_NICENESS="nohup nice -$niceness"
fi
# Using nice with no args to get the niceness level is GNU-specific.
# This check could be extended for other operating systems (e.g.,
# BSD could use "nohup sh -c 'ps -o nice -p $$' | tail -1").
# But, it also seems that GNU nohup is the only one which messes
# with the priority, so this is okay.
if nohup nice > /dev/null 2>&1
then
normal_niceness=`nice`
nohup_niceness=`nohup nice`
numeric_nice_values=1
for val in $normal_niceness $nohup_niceness
do
case "$val" in
-[0-9] | -[0-9][0-9] | -[0-9][0-9][0-9] | \
[0-9] | [0-9][0-9] | [0-9][0-9][0-9] )
;;
* )
numeric_nice_values=0 ;;
esac
done
if test $numeric_nice_values -eq 1
then
nice_value_diff=`expr $nohup_niceness - $normal_niceness`
if test $? -eq 0 && test $nice_value_diff -gt 0 && \
nice --$nice_value_diff echo testing > /dev/null 2>&1
then
# nohup increases the priority (bad), and we are permitted
# to lower the priority with respect to the value the user
# might have been given
niceness=`expr $niceness - $nice_value_diff`
NOHUP_NICENESS="nice -$niceness nohup"
fi
fi
else
if nohup echo testing > /dev/null 2>&1
then
:
else
# nohup doesn't work on this system
NOHUP_NICENESS=""
fi
fi
USER_OPTION=""
if test -w / -o "$USER" = "root"
then
if test "$user" != "root" -o $SET_USER = 1
then
USER_OPTION="--user=$user"
fi
# If we are root, change the err log to the right user.
touch $err_log; chown $user $err_log
if test -n "$open_files"
then
ulimit -n $open_files
args="--open-files-limit=$open_files $args"
fi
if test -n "$core_file_size"
then
ulimit -c $core_file_size
fi
fi
#
# 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 automatically
# checked and repaired during startup. You should add sensible key_buffer
# and sort_buffer values to my.cnf to improve check performance or require
# less disk space.
# Alternatively, you can start mysqld with the "myisam-recover" option. See
# the manual for details.
#
# 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 $safe_mysql_unix_port $pid_file # Some extra safety
if test -z "$args"
then
$NOHUP_NICENESS $ledir/$MYSQLD $defaults --basedir=$MY_BASEDIR_VERSION --datadir=$DATADIR $USER_OPTION --pid-file=$pid_file @MYSQLD_DEFAULT_SWITCHES@ >> $err_log 2>&1
else
eval "$NOHUP_NICENESS $ledir/$MYSQLD $defaults --basedir=$MY_BASEDIR_VERSION --datadir=$DATADIR $USER_OPTION --pid-file=$pid_file @MYSQLD_DEFAULT_SWITCHES@ $args >> $err_log 2>&1"
fi
if test ! -f $pid_file # This is removed if normal shutdown
then
echo "STOPPING server from pid file $pid_file"
break
fi
if @TARGET_LINUX@ && test $KILL_MYSQLD -eq 1
then
# Test if one process was hanging.
# This is only a fix for Linux (running as base 3 mysqld processes)
# but should work for the rest of the servers.
# The only thing is ps x => redhat 5 gives warnings when using ps -x.
# kill -9 is used or the process won't react on the kill.
numofproces=`ps xaww | grep -v "grep" | grep "$ledir/$MYSQLD\>" | grep -c "pid-file=$pid_file"`
echo -e "\nNumber of processes running now: $numofproces" | tee -a $err_log
I=1
while test "$I" -le "$numofproces"
do
PROC=`ps xaww | grep "$ledir/$MYSQLD\>" | grep -v "grep" | grep "pid-file=$pid_file" | sed -n '$p'`
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 "`date +'%y%m%d %H:%M:%S'` mysqld ended" | tee -a $err_log
echo "" | tee -a $err_log
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