watchdog.init

   1 #! /bin/sh
   2 #
   3 # chkconfig:            12345 89 89
   4 # description:          A software watchdog
   5 # rc file author:       Marc Merlin <marcsoft@merlins.org>
   6 #                       Henning P. Schmiedehausen <hps@tanstaafl.de>
   7 # Note that even though chkconfig says that this should be run at runlevel 1,
   8 # RH by default won't do this, so the RPM applies an ugly patch to
   9 # /etc/rc.d/init.d/single so that if you go from RL 3 to RL 1, watchdog is
  10 # restarted anyway (if it's not, it can cause the kernel to reboot your machine
  11 # depending on whether your kernel was compiled with CONFIG_WATCHDOG_NOWAYOUT)
  12 #
  13 # I have filed a bug with RH about this, and I hope they will change their
  14 # single script to allow for other scripts to be run in RL 1.
  15
  16 # Source function library.
  17 . /etc/rc.d/init.d/functions
  18
  19 [ -x /usr/sbin/watchdog -a -e /etc/watchdog.conf ] || exit 0
  20
  21 WATCHDOG_OOM_ADJUST="-1000"
  22 VERBOSE="no"
  23 if [ -f /etc/sysconfig/watchdog ]; then
  24         . /etc/sysconfig/watchdog
  25 fi
  26
  27 adjust_oom() {
  28         if [ -e /var/run/watchdog.pid ]; then
  29                 for pid in $(cat /var/run/watchdog.pid); do
  30                         if [ -w "/proc/$pid/oom_score_adj" ]; then
  31                                 echo "$WATCHDOG_OOM_ADJUST" > "/proc/$pid/oom_score_adj" 2> /dev/null || :
  32                         fi
  33                 done
  34         fi
  35 }
  36
  37 start() {
  38         if [ ! -f /var/lock/subsys/watchdog ]; then
  39                 msg_starting watchdog
  40                 busy
  41                 if [ -z "$WATCHDOG_MODULES" ]; then
  42                         # preload software module
  43                         modprobe -s softdog > /dev/null 2>&1
  44                 else
  45                         for module in $WATCHDOG_MODULES; do
  46                                 if [ "$module" = "ipmi_watchdog" ]; then
  47                                         modprobe -s ipmi_si > /dev/null 2>&1
  48                                         modprobe -s ipmi_devintf > /dev/null 2>&1
  49                                 fi
  50                                 modprobe -s $module > /dev/null 2>&1
  51                         done
  52                 fi
  53
  54                 if [ "${VERBOSE}" = "yes" ]; then
  55                         daemon watchdog -v
  56                 else
  57                         daemon watchdog
  58                 fi
  59                 RETVAL=$?
  60                 adjust_oom
  61                 [ $RETVAL -eq 0 ] && touch /var/lock/subsys/watchdog
  62         else
  63                 msg_already_running watchdog
  64         fi
  65 }
  66
  67 stop() {
  68         if [ -f /var/lock/subsys/watchdog ]; then
  69                 msg_stopping watchdog
  70                 killproc watchdog
  71                 # If you compiled your kernel with CONFIG_WATCHDOG_NOWAYOUT, you may
  72                 # not want  to remove the module  as sometimes /etc/rc.d/init.d/halt
  73                 # will hang on umounting some remote nfs partition or for some other
  74                 # reason, and you may then want the kernel to reboot by itself.
  75                 # However, this means that if you stop watchdog, your system has one
  76                 # minute to reboot cleanly, or it will be rebooted by the kernel. If
  77                 # this behavior  isn't what you  want, just uncomment  the following
  78                 # lines
  79                 if [ "$WATCHDOG_UNLOAD" = "yes" ]; then
  80                         if [ -z "$WATCHDOG_MODULES" ]; then
  81                                 # try to unload software module
  82                                 rmmod -s softdog > /dev/null 2>&1
  83                         else
  84                                 for module in $WATCHDOG_MODULES; do
  85                                         rmmod -s $module > /dev/null 2>&1
  86                                 done
  87                         fi
  88                 fi
  89
  90                 rm -f /var/lock/subsys/watchdog >/dev/null 2>&1
  91         else
  92                 msg_not_running watchdog
  93         fi
  94 }
  95
  96 condrestart() {
  97         if [ -f /var/lock/subsys/watchdog ]; then
  98                 stop
  99                 start
 100         else
 101                 msg_not_running watchdog
 102                 RETVAL=$1
 103         fi
 104 }
 105
 106 RETVAL=0
 107 # See how we were called.
 108 case "$1" in
 109   start)
 110         start
 111         ;;
 112   stop)
 113         stop
 114         ;;
 115   restart|force-reload)
 116         stop
 117         start
 118         ;;
 119   try-restart)
 120         condrestart 0
 121         ;;
 122   force-reload)
 123         condrestart 7
 124         ;;
 125   status)
 126         status watchdog
 127         exit $?
 128         ;;
 129   *)
 130         msg_usage "$0 {start|stop|restart|try-restart|force-reload|status}"
 131         exit 3
 132 esac
 133
 134 exit $RETVAL