etc/can_if

   1 #!/bin/sh
   2
   3 ### BEGIN INIT INFO
   4 # Provides:           can_if
   5 # Required-Start:     $local_fs $syslog mountkernfs
   6 # Required-Stop:      $local_fs $syslog mountkernfs
   7 # Default-Start:      2 3 4 5
   8 # Default-Stop:       0 1 6
   9 # Short-Description:  Starts the configured CAN-Interfaces and creates virtual CAN Interfaces on the system.
  10 ### END INIT INFO
  11
  12 #
  13 # $Id$
  14 #
  15 # Simple script to start CAN and VCAN interfaces with netlink configuration
  16 #
  17 # Copyright (c) 2009 Volkswagen Group Electronic Research
  18 #
  19
  20 # Exit if 'ip' from the iproute2 package is not installed
  21 test -x /sbin/ip || exit 0
  22
  23 # On some systems the automatic module loading via
  24 # /etc/modules.conf is quite slow. To ensure the immediately
  25 # availability of specific modules you can define critical
  26 # modules in the PROBE variable. E.g. PROBE="can-tp20"
  27
  28 # Exit if modprobe is not installed
  29 test -x /sbin/modprobe || exit 0
  30
  31 # The syntax for the CAN devices is: devname[@bitrate][,restart-ms]
  32 # example CAN_IF="can0 can1@500000 can2@500000,200 can3,500"
  33 CAN_IF=""
  34 VCAN_IF="vcan0 vcan1 vcan2 vcan3"
  35 PROBE="vcan"
  36
  37 case "$1" in
  38         start|force-reload)
  39         if [ -n "$PROBE" ] ; then
  40                 echo -n "Extra probing CAN modules:"
  41                 for MODULE in $PROBE; do
  42                         echo -n " "$MODULE
  43                         /sbin/modprobe -q $MODULE
  44                 done
  45                 echo "."
  46         fi
  47         if [ -n "$CAN_IF" ] ; then
  48                 echo -n "Enabling CAN interfaces:"
  49                 for IF in $CAN_IF; do
  50                         echo -n " "$IF
  51                         DEVICE=${IF%@*}
  52                         DEVICE=${DEVICE%,*}
  53                         HASBTR=`echo $IF | grep "@"`
  54                         if [ -n "$HASBTR" ]; then
  55                                 BITRATE=${IF#*@}
  56                                 BITRATE=${BITRATE%,*}
  57                                 /sbin/ip link set $DEVICE type can bitrate $BITRATE
  58                         fi
  59                         HASMS=`echo $IF | grep ","`
  60                         if [ -n "$HASMS" ]; then
  61                                 RESTARTMS=${IF#*,}
  62                                 /sbin/ip link set $DEVICE type can restart-ms $RESTARTMS
  63                         fi
  64                         /sbin/ip link set $DEVICE up
  65                 done
  66                 echo "."
  67         fi
  68         if [ -n "$VCAN_IF" ] ; then
  69                 echo -n "Creating and enabling virtual CAN interfaces:"
  70                 for IF in $VCAN_IF; do
  71                         echo -n " "$IF
  72                         /sbin/ip link add name $IF type vcan
  73                         /sbin/ip link set $IF up
  74                 done
  75                 echo "."
  76         fi
  77         ;;
  78         restart|reload)
  79         if [ -n "$CAN_IF" ] ; then
  80                 echo -n "Restarting CAN interfaces:"
  81                 for IF in $CAN_IF; do
  82                         DEVICE=${IF%@*}
  83                         DEVICE=${DEVICE%,*}
  84                         echo -n " "$DEVICE
  85                         /sbin/ip link set $DEVICE down
  86                         /sbin/ip link set $DEVICE up
  87                 done
  88                 echo "."
  89         fi
  90         if [ -n "$VCAN_IF" ] ; then
  91                 echo -n "Restarting virtual CAN interfaces:"
  92                 for IF in $VCAN_IF; do
  93                         echo -n " "$IF
  94                         /sbin/ip link set $IF down
  95                         /sbin/ip link set $IF up
  96                 done
  97                 echo "."
  98         fi
  99         ;;
 100         stop)
 101         if [ -n "$CAN_IF" ] ; then
 102                 echo -n "Shutting down CAN interfaces:"
 103                 for IF in $CAN_IF; do
 104                         DEVICE=${IF%@*}
 105                         DEVICE=${DEVICE%,*}
 106                         echo -n " "$DEVICE
 107                         /sbin/ip link set $DEVICE down
 108                 done
 109                 echo "."
 110         fi
 111         if [ -n "$VCAN_IF" ] ; then
 112                 echo -n "Shutting down and removing virtual CAN interfaces:"
 113                 for IF in $VCAN_IF; do
 114                         echo -n " "$IF
 115                         /sbin/ip link set $IF down
 116                         /sbin/ip link del $IF
 117                 done
 118                 echo "."
 119         fi
 120         ;;
 121         *)
 122         echo "Usage: /etc/init.d/can_if {start|stop|restart|reload|force-reload}"
 123         exit 1
 124 esac
 125
 126 exit 0