preinst is in mysql-common 5.8+1.0.4.
This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 | #!/bin/sh
set -e
if [ "$1" = "install" ] || [ "$1" = "upgrade" ]; then
if dpkg --compare-versions "$2" lt-nl "5.6.25-3~" ; then
# revert fallback my.cnf symlink setup performed by mariadb-common
# from 10.0.17-1~exp2 upto 10.0.20-2
if [ -L /etc/mysql/my.cnf ] && [ -f /etc/mysql/my.cnf.old ]; then
if [ "$(readlink /etc/mysql/my.cnf)" = "mariadb.cnf" ]; then
echo "Reverting my.cnf -> mariadb.cnf symlink setup by mariadb-common"
rm /etc/mysql/my.cnf
mv /etc/mysql/my.cnf.old /etc/mysql/my.cnf
fi
fi
# recover from mysql-common 5.6.25-2 turning this symlinked
# mariadb.cnf into my.cnf.migrated
if [ -f /etc/mysql/my.cnf.migrated ]; then
if [ "$(md5sum /etc/mysql/my.cnf.migrated | awk '{ print $1 }')" = "4720bbc1a03252fbb9eb83b55f0b6e10" ]; then
# unmodified mariadb.cnf with the migration header prepended
# by mysql-common.postinst
echo "Removing incorrect /etc/mysql/my.cnf.migrated that was actually mariadb.cnf"
rm /etc/mysql/my.cnf.migrated
if [ -f /etc/mysql/my.cnf.old ]; then
echo "Renaming (possibly unmodified) /etc/mysql/my.cnf.old to /etc/mysql/my.cnf.migrated"
mv /etc/mysql/my.cnf.old /etc/mysql/my.cnf.migrated
else
update-alternatives --remove my.cnf /etc/mysql/my.cnf.migrated
fi
fi
fi
fi
fi
# Automatically added by dh_installdeb/11ubuntu1
dpkg-maintscript-helper rm_conffile /etc/mysql/conf.d/.keepme 5.6.22-1~ mysql-common -- "$@"
# End automatically added section
# Automatically added by dh_installdeb/11ubuntu1
dpkg-maintscript-helper rm_conffile /etc/mysql/my.cnf 5.6.22-1~ mysql-common -- "$@"
# End automatically added section
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