#!/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

_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
chown pcp:pcp /etc/pcp/nssdb
chmod 775 /etc/pcp/nssdb

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

# must match src/pmdas/{json,bash,mmv}/GNUmakefile
for PMDA in bash json mmv; do
    # directory may be in optionally build component, so test first
    #
    if [ -d /var/lib/pcp/tmp/$PMDA ]
    then
	chown pcp:pcp /var/lib/pcp/tmp/$PMDA
	chmod 775 /var/lib/pcp/tmp/$PMDA
    fi
done

# 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
chown pcp:pcp /var/log/pcp/sa
chmod 775 /var/log/pcp/sa

# 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

do_systemd=true
which deb-systemd-helper >/dev/null 2>&1 || do_systemd=false
# only need to check pmcd.service, if it is here they will all
# be here
[ -f /lib/systemd/system/pmcd.service ] || do_systemd=false

if $do_systemd
then
    deb-systemd-helper enable pmcd.service >/dev/null
    deb-systemd-helper enable pmlogger.service >/dev/null
    deb-systemd-helper enable pmie.service >/dev/null
    deb-systemd-helper enable pmproxy.service >/dev/null
elif which update-rc.d >/dev/null 2>&1
then
    update-rc.d -f pmcd remove >/dev/null
    update-rc.d pmcd defaults >/dev/null
    update-rc.d -f pmlogger remove >/dev/null
    update-rc.d pmlogger defaults >/dev/null
    update-rc.d -f pmie remove >/dev/null
    update-rc.d pmie defaults >/dev/null
    update-rc.d -f pmproxy remove >/dev/null
    update-rc.d pmproxy defaults >/dev/null
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