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#!/bin/bash -e
#
# summary of how this script can be called:
# * <new-preinst> install
# * <new-preinst> install <old-version>
# * <new-preinst> upgrade <old-version>
# * <old-preinst> abort-upgrade <new-version>
#
if [ -n "$DEBIAN_SCRIPT_DEBUG" ]; then set -v -x; DEBIAN_SCRIPT_TRACE=1; fi
${DEBIAN_SCRIPT_TRACE:+ echo "#42#DEBUG# RUNNING $0 $*" 1>&2 }
export PATH=$PATH:/sbin:/usr/sbin:/bin:/usr/bin
# Try to stop the server in a sane way. If it does not success let the admin
# do it himself. No database directories should be removed while the server
# is running! Another mysqld in e.g. a different chroot is fine for us.
stop_server() {
if [ ! -x /etc/init.d/mysql ]; then return; fi
set +e
if [ -x /usr/sbin/invoke-rc.d ]; then
cmd="invoke-rc.d mysql stop"
else
cmd="/etc/init.d/mysql stop"
fi
$cmd
errno=$?
set -e
# 0=ok, 100=no init script (fresh install)
if [ "$errno" != 0 -a "$errno" != 100 ]; then
echo "${cmd/ */} returned $errno" 1>&2
echo "There is a MySQL server running, but we failed in our attempts to stop it." 1>&2
echo "Stop it yourself and try again!" 1>&2
exit 1
fi
}
##### here's a bunch of helper functions for converting database formats ######
cvt_get_param(){
/usr/sbin/mysqld --print-defaults \
| tr " " "\n" \
| grep -- "--$1" \
| tail -n 1 \
| cut -d= -f2
}
cvt_setup_stuff(){
mytmp=`mktemp -d -t mysql-ISAM-convert.XXXXXX`
cvt_log="$mytmp/conversion.log"
if [ ! -d "$mytmp" ]; then
echo "can't create temporary directory, oh well." >&2
exit 1
fi
chgrp mysql $mytmp
chmod g+rwx $mytmp
cvt_socket=${mytmp}/mysql.sock
cvt_mysqld="mysqld --skip-grant-tables --skip-networking --socket $cvt_socket"
cvt_mysql="mysql --socket $cvt_socket"
cvt_mysqladmin="mysqladmin --socket $cvt_socket"
}
cvt_get_databases(){
echo fetching database list ... >&2
$cvt_mysql -e 'show databases' | sed -n -e '2,$p'
}
cvt_get_tables(){
echo querying tables in $1 ... >&2
$cvt_mysql $1 -e 'show table status' | sed -n -e '2,$p' | \
cut -f 1,2 | grep -w 'ISAM$' | cut -f 1
}
cvt_convert_table(){
echo converting $1.$2 ... >&2
$cvt_mysql $1 -e "alter table $2 type=MyISAM"
}
cvt_wait_for_server(){
local count
echo -n waiting for server startup.. >&2
while ! $cvt_mysql </dev/null >/dev/null 2>&1; do
echo -n . >&2
sleep 1
count=".$count"
if [ -f $mytmp/mysql.done ]; then
echo "sorry... looks like the server crashed :(" >&2
return 1
elif [ "$count" = "...................." ]; then
echo "sorry... looks like the server didn't start :(" >&2
return 1
fi
done
echo ok. >&2
}
cvt_wait_for_exit(){
local count
echo -n waiting for server shutdown.. >&2
while [ ! -f $mytmp/mysql.done ]; do
echo -n . >&2
sleep 1
count=".$count"
if [ "$count" = "...................." ]; then
echo "hrm... guess it never started?" >&2
return 0
fi
done
echo ok. >&2
}
cvt_cleanup(){
local mysql_kids
rm -rf $mytmp
# kill any mysqld child processes left over. there *shouldn't* be any,
# but let's not take chances with that
mysql_kids=`ps o 'pid command' --ppid $$ | grep -E '^[[:digit:]]+ mysqld ' | cut -d' ' -f1`
if [ "$mysql_kids" ]; then
echo "strange, some mysql processes left around. killing them now." >&2
kill $mysql_kids
sleep 10
mysql_kids=`ps o 'pid command' --ppid $$ | grep -E '^[[:digit:]]+ mysqld ' | cut -d' ' -f1`
if [ "$mysql_kids" ]; then
echo "okay, they're really not getting the hint..." >&2
kill -9 $mysql_kids
fi
fi
}
################################ main() ##########################
# Check kernel version
if dpkg --compare-versions `uname -r` lt 2.6; then
/bin/echo -e "\nPROBLEM: MySQL-5.x is currently incompatible with kernel 2.4. Aborting.";
/bin/echo -e "See http://bugs.debian.org/416841 for more information.\n"
exit 1
fi
# to be sure
stop_server
# test if upgrading from non conffile state
if [ "$1" = "upgrade" ] && [ -x /usr/sbin/mysqld ]; then
cvt_datadir=`cvt_get_param datadir`
# test for ISAM tables, which we must convert NOW
if [ -n "`find $cvt_datadir -name '*.ISM' 2>/dev/null`" ]; then
set +e
cat << EOF >&2
----------------------------------------
WARNING WARNING WARNING
----------------------------------------
It has been detected that are are using ISAM format on some of your
mysql database tables. This format has been deprecated and no longer
supported. to prevent these databases from essentially disappearing,
an attempt at format conversion will now be made. please check after
your upgrade that all tables are present and accounted for.
apologies for the noise, but we thought you'd appreciate it :)
----------------------------------------
WARNING WARNING WARNING
----------------------------------------
EOF
cvt_setup_stuff
($cvt_mysqld >$cvt_log 2>&1; touch $mytmp/mysql.done ) &
if cvt_wait_for_server; then
dbs=`cvt_get_databases`
for db in $dbs; do
tables=`cvt_get_tables $db`
for tbl in $tables; do
cvt_convert_table $db $tbl
done
done
else
cvt_error="yes"
fi
echo shutting down server... >&2
$cvt_mysqladmin shutdown
cvt_wait_for_exit
echo "all done!" >&2
if [ ! "$cvt_error" = "yes" ]; then
cvt_cleanup
else
echo "you might want to look in $mytmp..." >&2
fi
set -e
fi
fi
exit 0
|