#!/bin/sh -e
### BEGIN INIT INFO
# Provides: networking ifupdown
# Required-Start: mountkernfs $local_fs urandom
# Required-Stop: $local_fs
# Default-Start: S
# Default-Stop: 0 6
# Short-Description: Raise network interfaces.
# Description: Prepare /run/network directory, ifstate file and raise network interfaces, or take them down.
### END INIT INFO

PATH="/sbin:/bin"
RUN_DIR="/run/network"
IFSTATE="$RUN_DIR/ifstate"
STATEDIR="$RUN_DIR/state"

[ -x /sbin/ifup ] || exit 0
[ -x /sbin/ifdown ] || exit 0

. /lib/lsb/init-functions

CONFIGURE_INTERFACES=yes
EXCLUDE_INTERFACES=
VERBOSE=no

[ -f /etc/default/networking ] && . /etc/default/networking

verbose=""
[ "$VERBOSE" = yes ] && verbose=-v

process_exclusions() {
set -- $EXCLUDE_INTERFACES
exclusions=""
for d
do
exclusions="-X $d $exclusions"
done
echo $exclusions
}

process_options() {
[ -e /etc/network/options ] || return 0
log_warning_msg "/etc/network/options still exists and it will be IGNORED! Please use /etc/sysctl.conf instead."
}

check_ifstate() {
if [ ! -d "$RUN_DIR" ] ; then
if ! mkdir -p "$RUN_DIR" ; then
log_failure_msg "can't create $RUN_DIR"
exit 1
fi
if ! chown root:netdev "$RUN_DIR" ; then
log_warning_msg "can't chown $RUN_DIR"
fi
fi
if [ ! -r "$IFSTATE" ] ; then
if ! :> "$IFSTATE" ; then
log_failure_msg "can't initialise $IFSTATE"
exit 1
fi
fi
}

check_network_file_systems() {
[ -e /proc/mounts ] || return 0

if [ -e /etc/iscsi/iscsi.initramfs ]; then
log_warning_msg "not deconfiguring network interfaces: iSCSI root is mounted."
exit 0
fi

while read DEV MTPT FSTYPE REST; do
case $DEV in
/dev/nbd*|/dev/nd[a-z]*|/dev/etherd/e*)
log_warning_msg "not deconfiguring network interfaces: network devices still mounted."
exit 0
;;
esac
case $FSTYPE in
nfs|nfs4|smbfs|ncp|ncpfs|cifs|coda|ocfs2|gfs|pvfs|pvfs2|fuse.httpfs|fuse.curlftpfs)
log_warning_msg "not deconfiguring network interfaces: network file systems still mounted."
exit 0
;;
esac
done < /proc/mounts
}

check_network_swap() {
[ -e /proc/swaps ] || return 0

while read DEV MTPT FSTYPE REST; do
case $DEV in
/dev/nbd*|/dev/nd[a-z]*|/dev/etherd/e*)
log_warning_msg "not deconfiguring network interfaces: network swap still mounted."
exit 0
;;
esac
done < /proc/swaps
}

ifup_hotplug () {
if [ -d /sys/class/net ]
then
ifaces=$(for iface in $(ifquery --list --allow=hotplug)
do
link=${iface##:*}
link=${link##.*}
if [ -e "/sys/class/net/$link" ] && [ "$(cat /sys/class/net/$link/operstate)" = up ]
then
echo "$iface"
fi
done)
if [ -n "$ifaces" ]
then
ifup $ifaces "$@" || true
fi
fi
}

case "$1" in
start)
if init_is_upstart; then
exit 1
fi
process_options
check_ifstate

if [ "$CONFIGURE_INTERFACES" = no ]
then
log_action_msg "Not configuring network interfaces, see /etc/default/networking"
exit 0
fi
set -f
exclusions=$(process_exclusions)
log_action_begin_msg "Configuring network interfaces"
if ifup -a $exclusions $verbose && ifup_hotplug $exclusions $verbose
then
log_action_end_msg $?
else
log_action_end_msg $?
fi
;;

stop)
if init_is_upstart; then
exit 0
fi
check_network_file_systems
check_network_swap

log_action_begin_msg "Deconfiguring network interfaces"
if ifdown -a --exclude=lo $verbose; then
log_action_end_msg $?
else
log_action_end_msg $?
fi
;;

reload)
if init_is_upstart; then
exit 1
fi
process_options

log_action_begin_msg "Reloading network interfaces configuration"
state=$(ifquery --state)
ifdown -a --exclude=lo $verbose || true
if ifup --exclude=lo $state $verbose ; then
log_action_end_msg $?
else
log_action_end_msg $?
fi
;;

force-reload|restart)
if init_is_upstart; then
exit 1
fi
process_options

log_warning_msg "Running $0 $1 is deprecated because it may not re-enable some interfaces"
log_action_begin_msg "Reconfiguring network interfaces"
ifdown -a --exclude=lo $verbose || true
set -f
exclusions=$(process_exclusions)
if ifup -a --exclude=lo $exclusions $verbose && ifup_hotplug $exclusions $verbose
then
log_action_end_msg $?
else
log_action_end_msg $?
fi
;;

*)
echo "Usage: /etc/init.d/networking {start|stop|reload|restart|force-reload}"
exit 1
;;
esac

exit 0

# vim: noet ts=8