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#!/bin/bash
#
# Script to bring up CAN interfaces configured in /etc/dev-mapping.conf
# as vcan interfaces if no physical interface is present.
#
vcan_up() {
if [ -n "$1" ]; then
echo "Bringing up $1 as virtual CAN device"
ip link add dev $1 type vcan
ip link set up $1
fi
}
if [ ! -f /etc/dev-mapping.conf ]; then
exit 0
fi
hs=$(grep ^hs= /etc/dev-mapping.conf |cut -d= -f2 |tr -d '"')
ls=$(grep ^ls= /etc/dev-mapping.conf |cut -d= -f2 |tr -d '"')
if [ -n "$hs" ]; then
echo "Checking $hs"
if ! ifconfig $hs >/dev/null 2>&1; then
vcan_up $hs
fi
fi
if [ -n "$ls" -a "$ls" != "$hs" ]; then
echo "Checking $ls"
if ! ifconfig $ls >/dev/null 2>&1; then
vcan_up $ls
fi
fi
exit 0
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