#!/bin/sh
#
# nix-daemon: Starts the nix package manager daemon
#
# chkconfig:   345 24 02
# description: This is a daemon which enable the multi-user mode
#               of the nix package manager.
# processname: nix-daemon
# pidfile:     /var/run/nix/nix-daemon.pid

### BEGIN INIT INFO
# Required-Start:
# Required-Stop:
# Should-Start:
# Should-Stop:
# Default-Start:     3 4 5
# Default-Stop:      0 1 2 6
# Short-Description: Starts the nix daemon
# Description:       This is a daemon which enable the multi-user mode
#                     of the nix package manager.
### END INIT INFO

NIX_DAEMON_BIN=/usr/sbin/nix-daemon
NIX_DAEMON_USER="root"
NIX_DAEMON_OPTS="--daemon"

umask 0022

if [ "$1" = 'status' ]; then
    test -x $NIX_DAEMON_BIN || exit 4
else
    test -x $NIX_DAEMON_BIN || exit 5
fi

# Source function library.
. /lib/lsb/init-functions

LOCKFILE=/var/lock/nix-daemon
RUNDIR=/var/run/nix
PIDFILE=${RUNDIR}/nix-daemon.pid
RETVAL=0

base=${0##*/}

start() {

    mkdir -p ${RUNDIR}
    chown ${NIX_DAEMON_USER}:${NIX_DAEMON_USER} ${RUNDIR}

    log_daemon_msg "Starting nix daemon" "nix-daemon"

    export NIX_SSL_CERT_FILE=/nix/store/6jicmrdf574c4g25j1xpffa54m80z4bv-nss-cacert-3.121/etc/ssl/certs/ca-bundle.crt
    /nix/store/zylnidm0i3d657bcaak4prp25k57iqgp-daemonize-1.7.8/bin/daemonize -u $NIX_DAEMON_USER -p ${PIDFILE} $NIX_DAEMON_BIN $NIX_DAEMON_OPTS
    RETVAL=$?
    log_end_msg $?
    [ $RETVAL -eq 0 ] && touch ${LOCKFILE}
    return $RETVAL
}

stop() {
    log_daemon_msg "Shutting down nix daemon" "nix-daemon"
    killproc -p ${PIDFILE} $NIX_DAEMON_BIN
    RETVAL=$?
    [ $RETVAL -eq 0 ] && rm -f ${LOCKFILE} ${PIDFILE}
    log_end_msg $?
    return $RETVAL
}

reload() {
    log_daemon_msg "Reloading nix daemon" "nix-daemon"
    killproc -p ${PIDFILE} $NIX_DAEMON_BIN -HUP
    RETVAL=$?
    log_end_msg $?
    return $RETVAL
}

restart() {
    stop
    start
}

RETVAL=0

# caller switch
case "$1" in
  start)
        start
    ;;
  stop)
        stop
    ;;
  status)
        status_of_proc -p ${PIDFILE} $NIX_DAEMON_BIN "nix-daemon"
            RETVAL=$?
    ;;
  restart)
        restart
    ;;
  reload)
        reload
    ;;
  condrestart)
        if [ -f $LOCKFILE ]; then
            restart
        fi
    ;;
  *)
        echo $"Usage: $0 {start|stop|status|restart|condrestart}"
        exit 2
    ;;
esac

exit $RETVAL
