#!/bin/bash

set -e

# debconf-devel(7) asks we do this
.  /usr/share/debconf/confmodule

# some shorthands for sanity
en="/etc/nagios4"
enc="/etc/nagios4/conf.d"
usn="/usr/share/nagios4"

setperm() {
    local user="${1}"
    local group="${2}"
    local mode="${3}"
    local file="${4}"
    shift 4
    # only do something when no setting exists
    if ! dpkg-statoverride --list "${file}" >/dev/null 2>&1
    then
	if [ -e "${file}" ]
	then
	    chown "${user}":"${group}" "${file}"
	    chmod "${mode}" "${file}"
	fi
    fi
}

case "${1}" in
    configure)
	if ! getent passwd nagios > /dev/null
	then
	    echo 'Adding system-user for nagios' 1>&2
	    adduser --system --group --home /var/lib/nagios \
		    --disabled-login --force-badname nagios > /dev/null
	fi

	# explicitly set permissions on some files that are dependent
	# on the uid/gid of the nagios user, which is dynamically created.
	setperm root nagios 0640 "${en}/resource.cfg"
	setperm nagios adm 2751 /var/log/nagios4
	setperm nagios adm 2751 /var/log/nagios4/archives
	setperm nagios nagios 0750 /var/lib/nagios4/spool
	setperm nagios nagios 0750 /var/lib/nagios4/spool/checkresults

	case "$(dpkg-query --status nagios-cgi 2>/dev/null)" in
	    install|hold)
	      setperm nagios nagios 0750 /var/lib/nagios4
	      setperm nagios nagios 0700 /var/lib/nagios4/rw ;;
	    *)
	      setperm nagios www-data 0750 /var/lib/nagios4
	      setperm nagios www-data 2710 /var/lib/nagios4/rw ;;
	esac

	;;
    abort-upgrade|abort-remove|abort-deconfigure)
	;;
    *)
	echo "postinst called with unknown argument '${1}'" >&2
	exit 1
	;;
esac

# 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/nagios4" ]; then
		update-rc.d nagios4 defaults 30 18 >/dev/null
		if [ -n "$2" ]; then
			_dh_action=restart
		else
			_dh_action=start
		fi
		invoke-rc.d nagios4 $_dh_action || exit 1
	fi
fi
# End automatically added section