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#!/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/bin/nix-daemon
#NIX_DAEMON_USER="root"
NIX_DAEMON_USER="nix-daemon"
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.
. /etc/init.d/functions

LOCKFILE=/var/lock/subsys/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}

    echo -n $"Starting nix daemon... "

    daemonize -u $NIX_DAEMON_USER -p ${PIDFILE} $NIX_DAEMON_BIN $NIX_DAEMON_OPTS
    RETVAL=$?
    echo
    [ $RETVAL -eq 0 ] && touch ${LOCKFILE}
    return $RETVAL
}

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

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

restart() {
    stop
    start
}

RETVAL=0

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

exit $RETVAL