#!/bin/bash
# postinst script for backuppc
#
# see: dh_installdeb(1)

set -e
#set -x

# summary of how this script can be called:
#        * <postinst> `configure' <most-recently-configured-version>
#        * <old-postinst> `abort-upgrade' <new version>
#        * <conflictor's-postinst> `abort-remove' `in-favour' <package>
#          <new-version>
#        * <deconfigured's-postinst> `abort-deconfigure' `in-favour'
#          <failed-install-package> <version> `removing'
#          <conflicting-package> <version>
# for details, see http://www.debian.org/doc/debian-policy/ or
# the debian-policy package
#
# quoting from the policy:
#     Any necessary prompting should almost always be confined to the
#     post-installation script, and should be protected with a conditional
#     so that unnecessary prompting doesn't happen if a package's
#     installation fails and the `postinst' is called with `abort-upgrade',
#     `abort-remove' or `abort-deconfigure'.

. /usr/share/debconf/confmodule
db_version 2.0

case "$1" in
    configure)
    
    # TODO: I should detect if par2, bzip2 ... are really installed
    # and modify config.pl accordingly.
    
    db_get backuppc/reconfigure-webserver
    webservers="$RET"
    db_get backuppc/restart-webserver
    webservers_rst="$RET"
    inc="/etc/backuppc/apache.conf"
    
    for webserver in $webservers ; do
	webserver=${webserver%,}
	test -x /usr/sbin/$webserver || continue
	
	case "$webserver" in                                    
        apache|apache-perl|apache-ssl|apache2)
	    # remove wwwconfig-common stuff
	    if grep -qs "^Include $inc" /etc/$webserver/httpd.conf; then
		mv -f /etc/$webserver/httpd.conf /etc/$webserver/httpd.conf.old.backuppc
		grep -v "^Include $inc" /etc/$webserver/httpd.conf.old.backuppc \
			> /etc/$webserver/httpd.conf
	    fi
	    # add new links
	    
	    # Apache 2.4 
	    if [ -d /etc/$webserver/conf-available -a ! -f /etc/$webserver/conf-available/backuppc.conf -a ! -h /etc/$webserver/conf-available/backuppc.conf ]; then
                ln -s /etc/backuppc/apache.conf /etc/$webserver/conf-available/backuppc.conf
                [ -f /etc/$webserver/conf.d/backuppc.conf ] && rm /etc/$webserver/conf.d/backuppc.conf

                if [ -e /usr/share/apache2/apache2-maintscript-helper ] ; then
                    . /usr/share/apache2/apache2-maintscript-helper
            	    apache2_invoke enconf backuppc.conf
                fi
            fi

	    # Apache < 2.4
	    newfile=false
            if [ -d /etc/$webserver/conf.d -a ! -f /etc/$webserver/conf.d/backuppc.conf -a ! -h /etc/$webserver/conf.d/backuppc.conf ]; then
                ln -s /etc/backuppc/apache.conf /etc/$webserver/conf.d/backuppc.conf
                [ -f /etc/$webserver/conf.d/backuppc ] && rm /etc/$webserver/conf.d/backuppc
		if [ "$webservers_rst" = "true" ]; then
		    # restart
		    invoke-rc.d $webserver reload
		fi
            fi
	    ;;
	esac
    done

    # creating backuppc group if he isn't already there
    if ! getent group backuppc >/dev/null; then
	addgroup --system backuppc >/dev/null
    fi

    # creating backuppc user if he isn't already there
    if ! getent passwd backuppc >/dev/null; then
	adduser --system --gecos "BackupPC" --ingroup backuppc \
	    --shell /bin/sh --home /var/lib/backuppc backuppc >/dev/null
	    
        # add backuppc to /etc/aliases
        if [ -f /etc/aliases ] || [ -L /etc/aliases ]; then
	    if ! grep -qi "^backuppc[[:space:]]*:" /etc/aliases; then
        	echo "backuppc: root" >> /etc/aliases
	        test -x "$(command -v newaliases)" && newaliases || :
	    fi
	fi
    fi
    
    #usermod -c "BackupPC Daemon" backuppc
    
    # chown some files only on the 1st install
    if [ -z "$2" ]; then 
    	mkdir /var/lib/backuppc/pc/localhost/
	chown backuppc:backuppc /var/lib/backuppc /var/lib/backuppc/* /var/lib/backuppc/pc/*
	chmod 750 /var/lib/backuppc /var/lib/backuppc/* /var/lib/backuppc/pc/*
    fi

    OVERRIDDEN=`dpkg-statoverride --list /usr/lib/backuppc/cgi-bin/index.cgi || true`
    # Force the perms to 4750 if 4755 was found
    echo "$OVERRIDDEN" | grep -q 4755 && OVERRIDDEN=""
    [ "${OVERRIDDEN}" = "" ] && dpkg-statoverride --force-all --update --add backuppc www-data 4750 /usr/lib/backuppc/cgi-bin/index.cgi

    if [ ! -f /etc/backuppc/htpasswd ]; then
	touch /etc/backuppc/htpasswd
	db_get backuppc/tmppass
	if [ -f /usr/bin/htpasswd ]; then
	    htpasswd -bm /etc/backuppc/htpasswd backuppc $RET
	else 
	    htpasswd2 -bm /etc/backuppc/htpasswd backuppc $RET
	fi
    fi
    db_reset backuppc/tmppass
    db_subst "backuppc/configuration-note" "pass" ""
    
    if which a2enmod >/dev/null; then
	a2enmod auth_basic
	a2enmod authz_groupfile
	a2enmod authn_file
	a2enmod authz_user
	a2enmod cgi
    fi
    
    # create a symlink to have the same directories as in the doc
    cd /etc/backuppc
    [ ! -e pc ] && ln -s /etc/backuppc pc
    
    # ucf stuff
    ucf --debconf-ok --three-way /usr/share/backuppc/conf/config.pl /etc/backuppc/config.pl

    # remove conffile
    #dpkg-maintscript-helper rm_conffile /etc/backuppc/config.pl 3.3.0-1 backuppc -- "$@";
    
    
    # change the rights of /etc/backuppc so that the CGI can modify the conf.
    chown backuppc:www-data /etc/backuppc /etc/backuppc/*

    # fix the perms of the backuppc password files
    chmod 640 /etc/backuppc/htpasswd
    
    ;;

    abort-upgrade|abort-remove|abort-deconfigure)

    ;;

    *)
    echo "postinst called with unknown argument \`$1'" >&2
    exit 1
    ;;
esac

db_stop

# dh_installdeb will replace this with shell code automatically
# generated by other debhelper scripts.

# Automatically added by dh_installinit/13.3.4
if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ] || [ "$1" = "abort-deconfigure" ] || [ "$1" = "abort-remove" ] ; then
	if [ -x "/etc/init.d/backuppc" ]; then
		update-rc.d backuppc defaults >/dev/null
		if [ -n "$2" ]; then
			_dh_action=restart
		else
			_dh_action=start
		fi
		invoke-rc.d --skip-systemd-native backuppc $_dh_action || exit 1
	fi
fi
# End automatically added section
# Automatically added by dh_installsystemd/13.3.4
if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ] || [ "$1" = "abort-deconfigure" ] || [ "$1" = "abort-remove" ] ; then
	# This will only remove masks created by d-s-h on package removal.
	deb-systemd-helper unmask 'backuppc.service' >/dev/null || true

	# was-enabled defaults to true, so new installations run enable.
	if deb-systemd-helper --quiet was-enabled 'backuppc.service'; then
		# Enables the unit on first installation, creates new
		# symlinks on upgrades if the unit file has changed.
		deb-systemd-helper enable 'backuppc.service' >/dev/null || true
	else
		# Update the statefile to add new symlinks (if any), which need to be
		# cleaned up on purge. Also remove old symlinks.
		deb-systemd-helper update-state 'backuppc.service' >/dev/null || true
	fi
fi
# End automatically added section
# Automatically added by dh_installsystemd/13.3.4
if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ] || [ "$1" = "abort-deconfigure" ] || [ "$1" = "abort-remove" ] ; then
	if [ -d /run/systemd/system ]; then
		systemctl --system daemon-reload >/dev/null || true
		if [ -n "$2" ]; then
			_dh_action=restart
		else
			_dh_action=start
		fi
		deb-systemd-invoke $_dh_action 'backuppc.service' >/dev/null || true
	fi
fi
# End automatically added section


exit 0