diff options
Diffstat (limited to 'debian/mysql-server-5.5.preinst')
| -rw-r--r-- | debian/mysql-server-5.5.preinst | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/debian/mysql-server-5.5.preinst b/debian/mysql-server-5.5.preinst new file mode 100644 index 0000000..7ab1518 --- /dev/null +++ b/debian/mysql-server-5.5.preinst @@ -0,0 +1,185 @@ +#!/bin/bash +# +# 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> +# + +set -e + +. /usr/share/debconf/confmodule + +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 +MYADMIN="/usr/bin/mysqladmin --defaults-file=/etc/mysql/debian.cnf" +DATADIR=/var/lib/mysql +LOGDIR=/var/log/mysql +UPGRADEDIR=/var/lib/mysql-upgrade + +# 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 + db_stop + exit 1 + fi +} + +################################ main() ########################## + +this_version=5.5 + +# Abort if an NDB cluster is in use. +if egrep -qi -r '^[^#]*ndb.connectstring|^[[:space:]]*\[[[:space:]]*ndb_mgmd' /etc/mysql/; then + db_fset mysql-server/no_upgrade_when_using_ndb seen false || true + db_input high mysql-server/no_upgrade_when_using_ndb || true + db_go + db_stop + exit 1 +fi + +# Abort if skip-bdb option is enabled, required for 5.0 -> 5.1 upgrades. +#TODO + +# Safe the user from stupidities. +show_downgrade_warning=0 +for i in `ls $DATADIR/debian-*.flag 2>/dev/null`; do + found_version=`echo $i | sed 's/.*debian-\([0-9\.]\+\).flag/\1/'` + if dpkg --compare-versions "$this_version" '<<' "$found_version"; then + show_downgrade_warning=1 + break; + fi +done +if [ "$show_downgrade_warning" = 1 ]; then + db_fset mysql-server-$this_version/really_downgrade seen false || true + db_input medium mysql-server-$this_version/really_downgrade || true + db_go + db_get mysql-server-$this_version/really_downgrade || true + if [ "$RET" = "true" ]; then + rm -f $DATADIR/debian-*.flag + touch $DATADIR/debian-$this_version.flag + else + echo "Aborting downgrade from (at least) $found_version to $this_version." 1>&2 + echo "If are sure you want to downgrade to $this_version, remove the file" 1>&2 + echo "$DATADIR/debian-*.flag and try installing again." 1>&2 + db_stop + exit 1 + fi +fi + +# to be sure +stop_server + +# If we use NIS then errors should be tolerated. It's up to the +# user to ensure that the mysql user is correctly setup. +# Beware that there are two ypwhich one of them needs the 2>/dev/null! +if test -n "`which ypwhich 2>/dev/null`" && ypwhich >/dev/null 2>&1; then + set +e +fi + +# +# Now we have to ensure the following state: +# /etc/passwd: mysql:x:100:101:MySQL Server:/nonexistent:/bin/false +# /etc/group: mysql:x:101: +# +# Sadly there could any state be present on the system so we have to +# modify everything carefully i.e. not doing a chown before creating +# the user etc... +# + +# creating mysql group if he isn't already there +if ! getent group mysql >/dev/null; then + # Adding system group: mysql. + addgroup --system mysql >/dev/null +fi + +# creating mysql user if he isn't already there +if ! getent passwd mysql >/dev/null; then + # Adding system user: mysql. + adduser \ + --system \ + --disabled-login \ + --ingroup mysql \ + --no-create-home \ + --home /nonexistent \ + --gecos "MySQL Server" \ + --shell /bin/false \ + mysql >/dev/null +fi + +# end of NIS tolerance zone +set -e + +# if there's a symlink, let's store where it's pointing, because otherwise +# it's going to be lost in some situations +for dir in DATADIR LOGDIR; do + checkdir=`eval echo "$"$dir` + if [ -L "$checkdir" ]; then + mkdir -p "$UPGRADEDIR" + cp -d "$checkdir" "$UPGRADEDIR/$dir.link" + fi +done + +# creating mysql home directory +if [ ! -d $DATADIR -a ! -L $DATADIR ]; then + mkdir $DATADIR +fi + +# checking disc space +if LC_ALL=C BLOCKSIZE= df --portability $DATADIR/. | tail -n 1 | awk '{ exit ($4>1000) }'; then + echo "ERROR: There's not enough space in $DATADIR/" 1>&2 + db_stop + exit 1 +fi + +# Since the home directory was created before putting the user into +# the mysql group and moreover we cannot guarantee that the +# permissions were correctly *before* calling this script, we fix them now. +# In case we use NIS and no mysql user is present then this script should +# better fail now than later.. +# The "set +e" is necessary as e.g. a ".journal" of a ext3 partition is +# not chgrp'able (#318435). +set +e +chown mysql:mysql $DATADIR +find $DATADIR -follow -not -group mysql -print0 2>/dev/null \ + | xargs -0 --no-run-if-empty chgrp mysql +set -e + +# Some files below /etc/ were possibly in the mysql-server-5.0/etch package +# before. They get overwritten by current ones to avoid unnecessary dpkg questions. +while read md5 file; do + if [ "`md5sum $file 2>/dev/null`" = "$md5 $file" ]; then + cp /usr/share/mysql-common/internal-use-only/`echo $file | sed 's°/°_°g'` $file + fi +done <<EOT +6691f2fdc5c6d27ff0260eb79813e1bc /etc/init.d/mysql +b53b9552d44661361d39157c3c7c51d3 /etc/logrotate.d/mysql-server +57f3e58f72582ca55100dc1ba0f1a8ae /etc/mysql/debian-start +EOT + +db_stop + +#DEBHELPER# + +exit 0 |