debian/openvswitch-wdt.init

   1 #!/bin/sh
   2 #
   3 # Example init.d script with LSB support.
   4 #
   5 # Please read this init.d carefully and modify the sections to
   6 # adjust it to the program you want to run.
   7 #
   8 # Copyright (c) 2007, 2009 Javier Fernandez-Sanguino <jfs@debian.org>
   9 #
  10 # This is free software; you may redistribute it and/or modify
  11 # it under the terms of the GNU General Public License as
  12 # published by the Free Software Foundation; either version 2,
  13 # or (at your option) any later version.
  14 #
  15 # This is distributed in the hope that it will be useful, but
  16 # WITHOUT ANY WARRANTY; without even the implied warranty of
  17 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 # GNU General Public License for more details.
  19 #
  20 # You should have received a copy of the GNU General Public License with
  21 # the Debian operating system, in /usr/share/common-licenses/GPL;  if
  22 # not, write to the Free Software Foundation, Inc., 59 Temple Place,
  23 # Suite 330, Boston, MA 02111-1307 USA
  24 #
  25 ### BEGIN INIT INFO
  26 # Provides:          openvswitch-wdt
  27 # Required-Start:    $network $local_fs
  28 # Required-Stop:
  29 # Should-Start:      $named $syslog openvswitch-switch
  30 # Should-Stop:
  31 # Default-Start:     2 3 4 5
  32 # Default-Stop:      0 1 6
  33 # Short-Description: Open vSwitch switch watchdog
  34 ### END INIT INFO
  35
  36 PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
  37
  38 DAEMON=/usr/sbin/ovs-wdt
  39 NAME=openvswitch-wdt
  40 DESC="Open vSwitch switch watchdog"
  41
  42 PIDFILE=/var/run/$NAME.pid
  43
  44 test -x $DAEMON || exit 0
  45
  46 . /lib/lsb/init-functions
  47
  48 # Default options, these can be overriden by the information
  49 # at /etc/default/$NAME
  50 DAEMON_OPTS=""          # Additional options given to the daemon
  51
  52 DODTIME=10              # Time to wait for the daemon to die, in seconds
  53                         # If this value is set too low you might not
  54                         # let some daemons to die gracefully and
  55                         # 'restart' will not work
  56
  57 # Include defaults if available
  58 if [ -f /etc/default/$NAME ] ; then
  59         . /etc/default/$NAME
  60 fi
  61
  62 set -e
  63
  64 running_pid() {
  65 # Check if a given process pid's cmdline matches a given name
  66     pid=$1
  67     name=$2
  68     [ -z "$pid" ] && return 1
  69     [ ! -d /proc/$pid ] &&  return 1
  70     return 0
  71 }
  72
  73 running() {
  74 # Check if the process is running looking at /proc
  75 # (works for all users)
  76
  77     # No pidfile, probably no daemon present
  78     [ ! -f "$PIDFILE" ] && return 1
  79     pid=`cat $PIDFILE`
  80     running_pid $pid $DAEMON || return 1
  81     return 0
  82 }
  83
  84 start_daemon() {
  85 # Start the process using the wrapper
  86     if test $WDT_TIMEOUT != 0; then
  87         start-stop-daemon --start --quiet -m --background --pidfile $PIDFILE \
  88             --exec $DAEMON -- --timeout=$WDT_TIMEOUT --interval=$WDT_INTERVAL $DAEMON_OPTS
  89     fi
  90
  91     # Wait up to 3 seconds for the daemon to start.
  92     for i in 1 2 3; do
  93         if running; then
  94             break
  95         fi
  96         sleep 1
  97     done
  98
  99     echo $OOPS_REBOOT_TIME > /proc/sys/kernel/panic
 100     echo 1 > /proc/sys/kernel/panic_on_oops
 101 }
 102
 103 stop_daemon() {
 104     start-stop-daemon -o --stop --pidfile $PIDFILE
 105     rm $PIDFILE
 106 }
 107
 108 case "$1" in
 109   start)
 110         log_daemon_msg "Starting $DESC " "$NAME"
 111         # Check if it's running first
 112         if running ;  then
 113             log_progress_msg "apparently already running"
 114             log_end_msg 0
 115             exit 0
 116         fi
 117         if start_daemon && running ;  then
 118             # It's ok, the daemon started and is running
 119             log_end_msg 0
 120         else
 121             # Either we could not start it or it is not running
 122             # after we did
 123             # NOTE: Some daemons might die some time after they start,
 124             # this code does not try to detect this and might give
 125             # a false positive (use 'status' for that)
 126             log_end_msg 1
 127         fi
 128         ;;
 129   stop)
 130         log_daemon_msg "Stopping $DESC" "$NAME"
 131         if running ; then
 132             # Only stop the daemon if we see it running
 133             stop_daemon
 134             log_end_msg $?
 135         else
 136             # If it's not running don't do anything
 137             log_progress_msg "apparently not running"
 138             log_end_msg 0
 139             exit 0
 140         fi
 141         ;;
 142   restart|force-reload)
 143         log_daemon_msg "Restarting $DESC" "$NAME"
 144         if running ;  then
 145             stop_daemon
 146             # Wait some sensible amount, some daemons need this
 147             [ -n "$DIETIME" ] && sleep $DIETIME
 148         fi
 149         start_daemon
 150         running
 151         log_end_msg $?
 152         ;;
 153   status)
 154         log_daemon_msg "Checking status of $DESC" "$NAME"
 155         if running ;  then
 156             log_progress_msg "running"
 157             log_end_msg 0
 158         else
 159             log_progress_msg "apparently not running"
 160             log_end_msg 1
 161             exit 1
 162         fi
 163         ;;
 164   # Use this if the daemon cannot reload
 165   reload)
 166         log_warning_msg "Reloading $NAME daemon: not implemented, as the daemon"
 167         log_warning_msg "cannot re-read the config file (use restart)."
 168         ;;
 169   *)
 170         N=/etc/init.d/$NAME
 171         echo "Usage: $N {start|stop|restart|force-reload|status}" >&2
 172         exit 1
 173         ;;
 174 esac
 175
 176 exit 0