Add mysql-multi.server.sh, a replacement for mysql.server that

handles running several mysqlds on one host easily.  Original
multi-server modifications made by Tim Bunce.

support-files/mysql-multi.server.sh

+#!/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
+
+# Mysql daemon start/stop script. Multi-instance enhancements by Tim Bunce.
+
+# Usually this is put in /etc/init.d (at least on machines SYSV R4
+# based systems) and linked to
+#     /etc/rc3.d/S99mysql.svr1
+# and /etc/rc0.d/S01mysql.svr1
+# When this is done the mysql server will be started when the machine is
+# started and shut down when the systems goes down. The '.svr1' suffix can
+# be used to identify one of a number of servers. Multiple symlinks can be
+# created, one per instance. The 'svrN' suffix can then be used to
+# prefix configuration variables in a seperate section of /etc/my.cnf.
+# See example below.
+#
+# A typical multi-instance /etc/my.cnf file would look like:
+# [mysqld]
+# basedir=...
+# set-variable = key_buffer_size=16M
+# set-variable = max_allowed_packet=1M
+# [mysql_multi_server]
+# svr1-datadir=/foo1/bar
+# svr2-datadir=/foo2/bar
+#
+# and then the /foo1/bar/my.cnf and /foo2/bar/my.cnf files
+# would contain all the *instance specific* configurations.
+#
+# This script can also be run manually in which case the server instance
+# is identified by an extra argument, for example:
+#     /etc/init.d/mysql stop svr3
+#
+
+PATH=/sbin:/usr/sbin:/bin:/usr/bin
+export PATH
+
+mode=$1    # start or stop
+svr=$2     # eg 'svr1' (optional)
+if [ "$2" = "" ]
+then name=`basename $0`
+else name=$2
+fi
+
+# Extract identity of the server we are working with
+svr=`echo "$name" | sed -e 's/.*\<\(svr[1-9][0-9]*\)\>.*/\1/'`
+if [ "$svr" = "" ]
+then
+  echo "Can't determine database svr number from name '$name'"
+  exit 1
+fi
+
+echo "mysqld $svr $mode"
+
+parse_arguments() {
+  for arg do
+    case "$arg" in
+      --basedir=*|--${svr}-basedir=*)
+        basedir=`echo "$arg" | sed -e 's/^[^=]*=//'` ;;
+      --datadir=*|--${svr}-basedir=*)
+        datadir=`echo "$arg" | sed -e 's/^[^=]*=//'` ;;
+      --pid-file=*|--${svr}-basedir=*)
+        pid_file=`echo "$arg" | sed -e 's/^[^=]*=//'` ;;
+    esac
+  done
+}
+
+# Get arguments from the my.cfg file, groups [mysqld], [mysql_server],
+# and mysql_multi_server
+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
+  # Try to find basedir in /etc/my.cnf
+  conf=/etc/my.cnf
+  print_defaults=
+  if test -r $conf
+  then
+    subpat='^[^=]*basedir[^=]*=\(.*\)$'
+    dirs=`sed -e "/$subpat/!d" -e 's//\1/' $conf
+    for d in $dirs
+    do
+      d=`echo $d | sed -e 's/[ 	]//g'`
+      if test -x "$d/bin/my_print_defaults"
+      then
+        print_defaults="$d/bin/my_print_defaults"
+        break
+      fi
+      if test -x "$d/bin/mysql_print_defaults"
+      then
+        print_defaults="$d/bin/mysql_print_defaults"
+        break
+      fi
+    done
+  fi
+
+  # Hope it's in the PATH ... but I doubt it
+  test -z "$print_defaults" && print_defaults="my_print_defaults"
+fi
+
+datadir=@localstatedir@
+basedir=
+pid_file=
+parse_arguments `$print_defaults $defaults mysqld mysql_server mysql_multi_server`
+
+if test -z "$basedir"
+then
+  basedir=@prefix@
+  bindir=@bindir@
+else
+  bindir="$basedir/bin"
+fi
+if test -z "$pid_file"
+then
+  pid_file=$datadir/`@HOSTNAME@`.pid
+else
+  case "$pid_file" in
+    /* ) ;;
+    * )  pid_file="$datadir/$pid_file" ;;
+  esac
+fi
+
+# Safeguard (relative paths, core dumps..)
+cd $basedir
+
+case "$mode" in
+  'start')
+    # Start daemon
+
+    if test -x $bindir/safe_mysqld
+    then
+      # We only need to specify datadir and pid-file here and we
+      # get all other instance-specific config from $datadir/my.cnf.
+      # We have to explicitly pass --defaults-extra-file because it
+      # reads the config files before the command line options.
+      # Also it must be first because of the way safe_mysqld works.
+      $bindir/safe_mysqld --defaults-extra-file=$datadir/my.cnf \
+                          --datadir=$datadir --pid-file=$pid_file &
+      # Make lock for RedHat / SuSE
+      if test -d /var/lock/subsys
+      then
+        touch /var/lock/subsys/mysql
+      fi
+    else
+      echo "Can't execute $bindir/safe_mysqld"
+    fi
+    ;;
+
+  'stop')
+    # Stop daemon. We use a signal here to avoid having to know the
+    # root password.
+    if test -f "$pid_file"
+    then
+      mysqld_pid=`cat $pid_file`
+      echo "Killing mysqld $svr with pid $mysqld_pid"
+      kill $mysqld_pid
+      # mysqld should remove the pid_file when it exits, so wait for it.
+
+      sleep 1
+      while [ -s $pid_file -a "$flags" != aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa ]
+      do
+        [ -z "$flags" ] && echo "Wait for mysqld $svr to exit\c" || echo ".\c"
+        flags=a$flags
+        sleep 1
+      done
+      if [ -s $pid_file ]
+         then echo " gave up waiting!"
+      elif [ -n "$flags" ]
+         then echo " done"
+      fi
+      # delete lock for RedHat / SuSE
+      if test -e /var/lock/subsys/mysql
+      then
+        rm /var/lock/subsys/mysql
+      fi
+    else
+      echo "No mysqld pid file found. Looked for $pid_file."
+    fi
+    ;;
+
+  *)
+    # usage
+    echo "usage: $0 start|stop [ svrN ]"
+    exit 1
+    ;;
+esac