bridge-stp

   1 #!/bin/bash
   2 #
   3 # Script to start/stop spanning tree called from kernel
   4 # Make sure umask is sane
   5 umask 022
   6
   7 # Set up a default search path.
   8 PATH="/sbin:/usr/sbin:/bin:/usr/bin"
   9 export PATH
  10
  11 if [ $# -ne 2 ]; then
  12     echo "Usage: bridge-stp <bridge> {start|stop}"
  13     exit 1
  14 fi
  15 bridge=$1
  16 service=mstpd
  17 pid_file=/var/run/${service}.pid
  18
  19 # Set this to the list of bridges for which MSTP should be used
  20 MSTP_BRIDGES="br0"
  21
  22 # Set $pid to pids from /var/run* for {program}.  $pid should be declared
  23 # local in the caller.
  24 # Returns LSB exit code for the 'status' action.
  25 checkpid()
  26 {
  27     pid=
  28     if [ -f "$1" ] ; then
  29         local line p
  30         read line < "$pid_file"
  31         for p in $line ; do
  32             [ -z "${p//[0-9]/}" -a -d "/proc/$p" ] && pid="$pid $p"
  33         done
  34         if [ -n "$pid" ]; then
  35             return 0
  36         fi
  37         return 1 # "Program is dead and /var/run pid file exists"
  38     fi
  39     return 3 # "Program is not running"
  40 }
  41
  42 case $2 in
  43     start)
  44         checkpid $pid_file || exit 1
  45         for b in $MSTP_BRIDGES; do
  46             if [ "$bridge" == "$b" ]; then
  47                 exit 0;
  48             fi
  49         done
  50         exit 1 ;;
  51     stop)
  52         exit 0 ;;
  53     *)
  54         echo "Unknown action:" $2
  55         echo "Usage: bridge-stp <bridge> {start|stop}"
  56         exit 1
  57 esac