postinst

#!/bin/sh -e

#
# The goal here is to live-migrate PCP temporary files from places
# they may have been stashed away in previous versions.  This is
# important as they may be in-use by instrumented applications and
# we want to avoid loss of service as a result of the switch.
#

# The new place ... this should match the setting in /etc/pcp.conf
# _after_ the installation
#
PCP_TMP_DIR=/var/lib/pcp/tmp

# Function to do all of the temporary dir/file migration work
#
_clean_tmpdirs()
{
    #
    # Usage: _clean_tmpdirs [-v] new_dir old_dir ...
    #
    # Move temporary directories (which may be actively in use as
    # with pmdammv files) from one temporary directory to another
    # so as to transparently upgrade without loss of service.
    #
    # -v option is verbose mode for debugging
    #

    _verbose=false
    if [ $# -gt 0 -a X"$1" = "X-v" ]
    then
        _verbose=true
        shift
    fi

    if [ $# -lt 2 ]
    then
        echo >&2 "Usage: _clean_tmpdirs [-v] new_dir old_dir subdirs ..."
        return
    fi

    _new_tmp_dir="$1"
    _old_tmp_dir="$2"

    [ "$_new_tmp_dir" != "$old_tmp_dir" ] || return

    for _subdir
    do
        d="$_old_tmp_dir/$_subdir"
        test -d "$d" -a -k "$d" || continue
        cd "$d" || continue
        for f in * ; do
            [ "$f" != "*" ] || continue
            source="$d/$f"
            target="$_new_tmp_dir/$_subdir/$f"
            [ "$source" != "$target" ] || continue
            [ ! -f "$target" ] || continue
            $_verbose && echo + mv -fu "$source" "$target"
            mv -fu "$source" "$target" || true
        done
        $_verbose && echo + rmdir "$d"
        cd && rmdir "$d" 2>/dev/null || true
    done
}
_version_configs()
{
    # Use the supported conffile move method (no prompts)
    local FILE

    local NPMCD=/etc/pcp/pmcd
    local PMCD1=/etc/pmcd
    local PMCD2=/var/lib/pcp/config/pmcd
    for FILE in pmcd.conf pmcd.options rc.local; do
        dpkg-maintscript-helper mv_conffile $PMCD2/$FILE $NPMCD/$FILE 3.7.0~ pcp -- "$@"
        dpkg-maintscript-helper mv_conffile $PMCD1/$FILE $NPMCD/$FILE 3.6.1~ pcp -- "$@"
    done

    local NPMIE=/etc/pcp/pmie
    local PMIE1=/etc/pmie
    local PMIE2=/var/lib/pcp/config/pmie
    for FILE in control; do
        dpkg-maintscript-helper mv_conffile $PMIE2/$FILE $NPMIE/$FILE 3.7.0~ pcp -- "$@"
        dpkg-maintscript-helper mv_conffile $PMIE1/$FILE $NPMIE/$FILE 3.6.1~ pcp -- "$@"
    done

    local NPMPROXY=/etc/pcp/pmproxy
    local PMPROXY1=/etc/pmproxy
    local PMPROXY2=/var/lib/pcp/config/pmproxy
    for FILE in pmproxy.options; do
        dpkg-maintscript-helper mv_conffile $PMPROXY2/$FILE $NPMPROXY/$FILE 3.7.0~ pcp -- "$@"
        dpkg-maintscript-helper mv_conffile $PMPROXY1/$FILE $NPMPROXY/$FILE 3.6.1~ pcp -- "$@"
    done

    local NPMLOGGER=/etc/pcp/pmlogger
    local PMLOGGER1=/etc/pmlogger
    local PMLOGGER2=/var/lib/pcp/config/pmlogger
    for FILE in control; do
        dpkg-maintscript-helper mv_conffile $PMLOGGER2/control $NPMLOGGER/control 3.7.0~ pcp -- "$@"
        dpkg-maintscript-helper mv_conffile $PMLOGGER1/control $NPMLOGGER/control 3.6.1~ pcp -- "$@"
    done
}

if dpkg-maintscript-helper supports mv_conffile
then
    _version_configs "$@"
fi

touch /var/lib/pcp/pmns/.NeedRebuild
chmod 644 /var/lib/pcp/pmns/.NeedRebuild

getent group pcp >/dev/null || groupadd -r pcp
getent passwd pcp >/dev/null || \
useradd -c "Performance Co-Pilot" -g pcp -d /var/lib/pcp -M -r -s /usr/sbin/nologin pcp

# must match GNUmakefile
chown pcp:pcp /var/lib/pcp/config/pmda
chmod 775 /var/lib/pcp/config/pmda
chown pcp:pcp /var/lib/pcp/tmp
chmod 775 /var/lib/pcp/tmp
chown pcp:pcp /var/log/pcp
chmod 775 /var/log/pcp

# must match src/pmcd/GNUmakefile
chown pcp:pcp /var/log/pcp/pmcd
chmod 775 /var/log/pcp/pmcd

# must match src/pmie/GNUmakefile
chown pcp:pcp /var/lib/pcp/config/pmie
chmod 775 /var/lib/pcp/config/pmie
chown pcp:pcp /var/lib/pcp/tmp/pmie
chmod 775 /var/lib/pcp/tmp/pmie
chown pcp:pcp /var/log/pcp/pmie
chmod 775 /var/log/pcp/pmie

# must match src/pmlogger/GNUmakefile
chown pcp:pcp /var/lib/pcp/config/pmlogger
chmod 775 /var/lib/pcp/config/pmlogger
chown pcp:pcp /var/lib/pcp/tmp/pmlogger
chmod 775 /var/lib/pcp/tmp/pmlogger
chown pcp:pcp /var/log/pcp/pmlogger
chmod 775 /var/log/pcp/pmlogger

# must match src/pmproxy/GNUmakefile
chown pcp:pcp /var/log/pcp/pmproxy
chmod 775 /var/log/pcp/pmproxy

# and fixup the change in deployment plan for these ones in the case
# of an upgrade, rather than an install ... they used to be pcp:pcp
chown root:root /etc/pcp/pmie
chmod 755 /etc/pcp/pmie
chown root:root /etc/pcp/pmie/control
chmod 644 /etc/pcp/pmie/control
chown root:root /etc/pcp/pmlogger
chmod 755 /etc/pcp/pmlogger
chown root:root /etc/pcp/pmlogger/control
chmod 644 /etc/pcp/pmlogger/control

# migrate generated config files from /etc/pcp/* to /var/lib/pcp/config/*
#
if [ -f /etc/pcp/pmie/config.default ]
then
    cp /etc/pcp/pmie/config.default /var/lib/pcp/config/pmie/config.default
    rm -f /etc/pcp/pmie/config.default
    chown pcp:pcp /var/lib/pcp/config/pmie/config.default
    chmod 644 /var/lib/pcp/config/pmie/config.default
fi
if [ -f /etc/pcp/pmlogger/config.default ]
then
    cp /etc/pcp/pmlogger/config.default /var/lib/pcp/config/pmlogger/config.default
    rm -f /etc/pcp/pmlogger/config.default
    chown pcp:pcp /var/lib/pcp/config/pmlogger/config.default
    chmod 644 /var/lib/pcp/config/pmlogger/config.default
fi

update-rc.d pmcd defaults >/dev/null
update-rc.d pmlogger defaults >/dev/null
update-rc.d pmie defaults >/dev/null
update-rc.d pmproxy defaults >/dev/null

# migrate existing statistics files to their new (permanent!) home
#
for dir in /var/tmp/mmv /var/tmp/pmdabash
do
    [ -d $dir ] || continue
    [ "$(LC_ALL=C stat -c '%u %g %F' $dir)" = "0 0 directory" ] && mv $dir /var/lib/pcp/tmp
done
_clean_tmpdirs $PCP_TMP_DIR /var/tmp pmie pmlogger

# transition pmdadmcache over to pmdadm (device mapper)
#
PCP_PMCDCONF_PATH=/etc/pcp/pmcd/pmcd.conf
PCP_PMDAS_DIR=/var/lib/pcp/pmdas/
if grep -q ^dmcache $PCP_PMCDCONF_PATH 2>/dev/null
then
    mkdir -p -m 755 "$PCP_PMDAS_DIR/dm"
    touch "$PCP_PMDAS_DIR/dm/.NeedInstall"
    touch "$PCP_PMDAS_DIR/dmcache/.NeedRemove"
fi

if which invoke-rc.d >/dev/null 2>&1; then
    invoke-rc.d pmcd start
    invoke-rc.d pmlogger start
else
    /etc/init.d/pmcd start
    /etc/init.d/pmlogger start
fi
pcp 3.10.8build1 / postinst
