#!/bin/bash
### BEGIN INIT INFO
# Provides:          vyatta-router
# Required-Start:    $syslog $time $local_fs vyatta-unicast
# Required-Stop:     $syslog $time $local_fs
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: VyOS Router
# Description:       Debian init script for the VyOS Router
### END INIT INFO
# **** License ****
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# A copy of the GNU General Public License is available as
# `/usr/share/common-licenses/GPL' in the Debian GNU/Linux distribution
# or on the World Wide Web at `http://www.gnu.org/copyleft/gpl.html'.
# You can also obtain it by writing to the Free Software Foundation,
# Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
# MA 02110-1301, USA.
#
# Author:	Tom Grennan <tgrennan@vyatta.com>
# **** End License ****

. /lib/lsb/init-functions

: ${vyatta_env:=/etc/default/vyatta}
source $vyatta_env

declare progname=${0##*/}
declare action=$1; shift

declare -x BOOTFILE=$vyatta_sysconfdir/config/config.boot

# If vyos-config= boot option is present, use that file instead
VYOS_CONFIG=$(cat /proc/cmdline | grep -Eo '\bvyos-config=(\S+)\b' /proc/cmdline | awk -F'=' '{print $2}')

if [ ! -z "$VYOS_CONFIG" ]; then
    if [ -r "$VYOS_CONFIG" ]; then
        echo "Config selected manually: $VYOS_CONFIG"
        declare -x BOOTFILE="$VYOS_CONFIG"
    else
        echo "WARNING: Could not read selected config file, using default!"
    fi
fi

declare -a subinit
declare -a all_subinits=(
    rl-system
    firewall )

if [ $# -gt 0 ] ; then
    for s in $@ ; do
	[ -x ${vyatta_sbindir}/${s}.init ] && subinit[${#subinit}]=$s
    done
else
    for s in ${all_subinits[@]} ; do
	[ -x ${vyatta_sbindir}/${s}.init ] && subinit[${#subinit}]=$s
    done
fi

GROUP=vyattacfg

# check if bootup of this portion is disabled
disabled () {
    grep -q -w no-vyos-$1 /proc/cmdline
}

# if necessary, provide initial config
init_bootfile () {
   if [ ! -r $BOOTFILE ] ; then
	if [ -f $vyatta_sysconfdir/config.boot.default ]; then
	  cp $vyatta_sysconfdir/config.boot.default $BOOTFILE
        else
          $vyatta_sbindir/vyatta_current_conf_ver.pl > $BOOTFILE
        fi

	chgrp ${GROUP} $BOOTFILE
	chmod 660 $BOOTFILE
    fi
}

# if necessary, migrate initial config
migrate_bootfile ()
{
    if [ -x $vyatta_sbindir/vyatta_config_migrate.pl ]; then
        log_progress_msg migrate
        sg ${GROUP} -c "$vyatta_sbindir/vyatta_config_migrate.pl $BOOTFILE"
    fi
}

# load the initial config
load_bootfile ()
{
    log_progress_msg configure
    (
      if [ -f /etc/default/vyatta-load-boot ]; then
        # build-specific environment for boot-time config loading
        source /etc/default/vyatta-load-boot
      fi
      sg ${GROUP} -c "$vyatta_sbindir/vyatta-boot-config-loader $BOOTFILE"
    )
}

# 
# On image booted machines, we need to mount /boot from the image-specific
# boot directory so that kernel package installation will put the
# files in the right place.  We also have to mount /boot/grub from the
# system-wide grub directory so that tools that edit the grub.cfg
# file will find it in the expected location.
#
bind_mount_boot()
{
    if [ -e /live/image/boot ]; then
	image_name=`cat /proc/cmdline | sed -e s+^.*vyatta-union=/boot/++ | sed -e 's/ .*$//'`
	if [ -n "$image_name" ]; then
	    mount --bind /live/image/boot/$image_name /boot
	    if [ $? -ne 0 ]; then
		echo "Couldn't bind mount /boot"
	    fi
	    if [ ! -d /boot/grub ]; then
		mkdir /boot/grub
	    fi
	    mount --bind /live/image/boot/grub /boot/grub
	    if [ $? -ne 0 ]; then
		echo "Couldn't bind mount /boot/grub"
	    fi
	fi
    fi
}

#
# On live booted machines (i.e. systems booted from LiveCD and systems
# booted from images), the /opt/vyatta/etc/config directory is bind
# mounted to /config.  We want all machines to have the config directory
# mounted under /config because it is a more convenient location.  So we
# bind mount /opt/vyatta/etc/config to /config here if it has not already
# been done.
#
mount_slash_config ()
{
    mounted=`mount | grep /opt/vyatta/etc/config`

    if [ -z "$mounted" ]; then
	if [ ! -d /config ]; then
	    mkdir /config
	fi
	mount --bind /opt/vyatta/etc/config /config
    fi
    chgrp -R ${GROUP} /config
}

start ()
{
    log_action_begin_msg "Mounting VyOS Config"
    # ensure the vyatta_configdir supports a large number of inodes since
    # the config hierarchy is often inode-bound (instead of size).
    # impose a minimum and then scale up dynamically with the actual size
    # of the system memory.
    local tmem=$(sed -n 's/^MemTotal: \+\([0-9]\+\) kB$/\1/p' /proc/meminfo)
    local tpages
    local tmpfs_opts="nosuid,nodev,mode=775,nr_inodes=0" #automatically allocate inodes
    mount -o $tmpfs_opts -t tmpfs none ${vyatta_configdir} \
      && chgrp ${GROUP} ${vyatta_configdir}
    log_action_end_msg $?

    disabled bootfile || init_bootfile

    mount_slash_config

    log_daemon_msg "Starting VyOS router"
    disabled migrate || migrate_bootfile
    for s in ${subinit[@]} ; do
	if ! disabled $s; then 
	    log_progress_msg $s
	    if ! ${vyatta_sbindir}/${s}.init start
	    then log_failure_msg
		 exit 1
	    fi
	fi
    done

    disabled configure || load_bootfile
    log_end_msg $?

    telinit q
    bind_mount_boot
    chmod g-w,o-w /
}

stop()
{
    local -i status=0
    log_daemon_msg "Stopping VyOS router"
    for ((i=${#sub_inits[@]} - 1; i >= 0; i--)) ; do
	s=${subinit[$i]}
	log_progress_msg $s
	${vyatta_sbindir}/${s}.init stop
	let status\|=$?
    done
    log_end_msg $status
    log_action_begin_msg "Un-mounting VyOS Config"
    umount ${vyatta_configdir}
    log_action_end_msg $?
}

case "$action" in
    start) start ;;
    stop)  stop ;;
    restart|force-reload) stop && start ;;
    *)	log_failure_msg "usage: $progname [ start|stop|restart ] [ subinit ... ]" ;
	false ;;
esac

exit $?

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