#!/bin/bash
# Init : initialise une machine et la met en conformité
# Copyright (c) 2021 Geoffray Levasseur <geoffray.levasseur@obs-mip.fr>

export VERSION="0.95.1"

# Stocke le chemin du script
MYPATH=$(dirname $0)

# Charge les bibliothèques
for lib in $MYPATH/lib/*.sh; do
    . $lib
done

# Check if a function exists
function_exists() {
    declare -f -F $1 > /dev/null
    return $?
}

function_exists prnt || (
    echo "Il manque des fonctions vitales dans les bibliothèques !"
    exit 2
)

# Vérifie qu'on soit root
if [[ $EUID -ne 0 ]];
   prnt E "Ce script doit être démarré en tant que root. Arrêt."
   exit 1
fi

# Variables globales importantes
export HOSTNAME=$(hostname)
export LOGFILE=${LOGFILE:-"$MYPATH/log/init-$(uname -n)-$(stdtime).log"}

prnt I "Création du répertoire d'accueil du fichier log..."
[[ ! -d $(dirname $LOGFILE) ]] && mkdir -pv $(dirname $LOGFILE)

# Log toute les sortie dans le fichier de log
exec 3>&1 4>&2
trap 'exec 2>&4 1>&3' 0 1 2 3
exec 1>$LOGFILE 2>&1

# Récupère la configuration
prnt I "Chargement de la configuration..."
if [[ -e $MYPATH/conf/$HOSTNAME.conf ]]; then
    prnt I "Une configuration spécifique sera utilisé."
    . $MYPATH/conf/$HOSTNAME.conf
else
    prnt I "Une configuration générique sera utilisé."
    [[ -e $MYPATH/conf/init.conf.sh ]] && . $MYPATH/conf/init.conf.sh || (
	    prnt E "Aucune configuration trouvée, impossible de continuer."
fi

# Additionnal packages (some are necessary to that script to end successfully)
install_pkg()
{
    apt install -y $INSTLIST
}

# Profile
install_profile()
{
    installfile ansi_shadow.flf /usr/share/figlet/ansi_shadow.flf
    for usr in /root /home/*; do
	backupdist $usr/{,.}profile $usr/.bashrc
	installfile {{.,}profile,.bashrc} $usr/
    done
    backupdist /etc/motd
    installfile motd /etc/motd
}

# Supervision
patch_snmp()
{
    backupdist /etc/snmp/snmpd.conf /etc/default/snmpd /lib/systemd/system/snmpd.service \
	       /etc/init.d/snmpd
    installfile snmpd.conf /etc/snmp/snmpd.conf
    installfile snmpd.init /etc/init.d/snmpd
    [[ -e /lib/systemd/system/snmpd.service ]] &&
        installfile snmpd.service /lib/systemd/system/snmpd.service
    /etc/init.d/snmpd restart || true # error on systemd systems requiring reboot wich we'll do anyway after that script
}

install_mk-agent()
{
    apt install -y $BASEGPDIR/mk_agents/check-mk-agent_${MKVERSION}_all.deb
    backupdist /etc/xinetd.d/check_mk
    installfile check_mk /etc/xinetd.d/check_mk
    /etc/init.d/xinetd restart
}

# Syslog
conf_syslog()
{
    backupdist /etc/rsyslog.conf
    installfile rsyslog.conf /etc/rsyslog.conf
    /etc/init.d/rsyslog restart
}

# Mail
conf_mail()
{
    installfile postfix.cf /etc/postfix/main.cf
    sed -i -e "s/#HOSTNAME#/$HOSTNAME/g" /etc/postfix/main.cf
    /etc/init.d/postfix restart
}


# ======================
# ==== Main Program ====
# ======================

upgrade_dist
[[ ! $PVEHST ]] && install_ceph && conf_ceph
[[ ! $PVEHST ]] && apt_blacklist
#[[ ! $PVEHST ]] && authnz
#[[ ! $PVEHST ]] && add_users
conf_locale
install_pkg
conf_ntp
conf_ssh
install_profile
patch_snmp
install_mk-agent
conf_syslog
conf_mail

echo "That's all folks !"
echo "Après vérification des logs, il est recommandé de redémarrer la machine..."