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|
#! /bin/sh
### BEGIN INIT INFO
# Provides: natlog
# Required-Start: $network $syslog $remote_fs
# Required-Stop: $network $syslog $remote_fs
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: NAT logging daemon
### END INIT INFO
# Author: Frank B. Brokken <f.b.brokken@rug.nl>
# George Danchev <danchev@spnet.net>
# Do NOT "set -e"
# PATH should only include /usr/* if it runs after the mountnfs.sh script
PATH=/sbin:/usr/sbin:/bin:/usr/bin
DESC="NAT logging daemon"
NAME=natlog
DAEMON=/usr/bin/$NAME # note: /usr/BIN, not /usr/SBIN
#DAEMON_ARGS="--options args"
PIDFILE=/run/natlog.pid # can be modified in /etc/default/natlog
SCRIPTNAME=/etc/init.d/$NAME
conntrackDevice=/proc/net/nf_conntrack
# Exit if the package is not installed
[ -x "$DAEMON" ] || exit 0
# Read configuration variable file if it is present
[ -r /etc/default/$NAME ] && . /etc/default/$NAME
# Load the VERBOSE setting and other rcS variables
. /lib/init/vars.sh
VERBOSE="yes"
# Define LSB log_* functions.
# Depend on lsb-base (>= 3.2-14) to ensure that this file is present
# and status_of_proc is working.
. /lib/lsb/init-functions
load_kernel_module()
{
local module args
module="$1"
m_args="$2"
# bail out if the conntrack device is already available.
[ -f ${conntrackDevice} ] && return 0
# give up if the kernel does not support modules
[ -f /proc/modules ] || return 0
[ -x /sbin/modprobe ] || return 0
if [ "$VERBOSE" = "yes" ]; then
log_action_msg "Loading kernel module $module"
modprobe $module $m_args || true
else
modprobe $module $m_args > /dev/null 2>&1 || true
fi
}
do_start()
{
# Return
# 0 if daemon has been started
# 1 if daemon was already running
# 2 if daemon could not be started
start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON --test > /dev/null \
|| return 1
start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON -- \
$DAEMON_ARGS \
|| return 2
# Add code here, if necessary, that waits for the process to be ready
# to handle requests from services started subsequently which depend
# on this one. As a last resort, sleep for some time.
}
do_stop()
{
# Return
# 0 if daemon has been stopped
# 1 if daemon was already stopped
# 2 if daemon could not be stopped
# other if a failure occurred
start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 --pidfile $PIDFILE --name $NAME
RETVAL="$?"
[ "$RETVAL" = 2 ] && return 2
# Wait for children to finish too if this is a daemon that forks
# and if the daemon is only ever run from this initscript.
# If the above conditions are not satisfied then add some other code
# that waits for the process to drop all resources that could be
# needed by services started subsequently. A last resort is to
# sleep for some time.
start-stop-daemon --stop --quiet --oknodo --retry=0/30/KILL/5 --exec $DAEMON
[ "$?" = 2 ] && return 2
rm -f $PIDFILE
return "$RETVAL"
}
case "$1" in
start)
load_kernel_module nf_conntrack_ipv4
[ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC" "$NAME"
do_start
case "$?" in
0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
esac
;;
stop)
[ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME"
do_stop
case "$?" in
0) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
1) [ "$VERBOSE" != no ] && echo -n " - daemon was already stopped" && log_end_msg 0 ;;
2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
esac
;;
status)
status_of_proc "$DAEMON" "$NAME" && exit 0 || exit $?
;;
restart|force-reload)
log_daemon_msg "Restarting $DESC" "$NAME"
do_stop
case "$?" in
0|1)
do_start
case "$?" in
0) log_end_msg 0 ;;
1) log_end_msg 1 ;; # Old process is still running
*) log_end_msg 1 ;; # Failed to start
esac
;;
*)
# Failed to stop
log_end_msg 1
;;
esac
;;
*)
echo "Usage: $SCRIPTNAME {start|stop|status|restart|force-reload}" >&2
exit 3
;;
esac
:
|
