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#!/bin/bash
# **** License ****
# Version: VPL 1.0
#
# The contents of this file are subject to the Vyatta Public License
# Version 1.0 ("License"); you may not use this file except in
# compliance with the License. You may obtain a copy of the License at
# http://www.vyatta.com/vpl
#
# Software distributed under the License is distributed on an "AS IS"
# basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
# the License for the specific language governing rights and limitations
# under the License.
#
# This code was originally developed by Vyatta, Inc.
# Portions created by Vyatta are Copyright (C) 2007 Vyatta, Inc.
# All Rights Reserved.
#
# Author: Tom Grennan <tgrennan@vyatta.com>
# Description: search Vyatta config for interface name given address
#
# **** End License ****
debug=
match=
attr_address=0:0:0:0:0:0
test -r /etc/default/vyatta && source /etc/default/vyatta
# process command line variable overrides
for arg ; do
case "$arg" in
--debug )
debug=echo
;;
--*=* )
arg=${arg#--}
eval ${arg%=*}=\"${arg#*=}\"
;;
*=* )
eval ${arg%=*}=\"${arg#*=}\"
;;
*:*:*:*:*:* )
attr_address=$arg
;;
* )
kname=$arg
;;
esac
done
: ${vyatta_prefix:=/opt/vyatta}
: ${vyatta_sysconfdir:=${vyatta_prefix}/etc}
: ${BOOTFILE:=${vyatta_sysconfdir:-/opt/vyatta/etc}/config/config.boot}
shopt -s extglob nullglob
# load cfg_eth_hwid array from config file as follows
# interface {
# ...
# ethernet eth# {
# ...
# hw-id: XX:XX:XX:XX:XX:XX
# ...
# }
# }
#
# cfg_eth_hwid=( "eth#=xx:xx:xx:xx:xx:xx" ... )
declare -a cfg_net_hwid=( $( sed -ne '
/^interfaces {/,/^}/ {
/^ *ethernet eth[0-9]* {/,/^ $/ {
/^ *ethernet/ {
s/.* eth\([0-9]\+\) {$/ eth\1=/
# hold interface name
h
}
/^.*hw-id:/ {
# translate field name
s/.*hw-id: *//
# tolower hex mac address
y/ABCDEF/abcdef/
# exchange hold and pattern space
x
# concatenate hold and pattern
G
s/\n//p
}
}
}' $BOOTFILE ))
for name_hwid in ${cfg_net_hwid[@]} ; do
name=${name_hwid%=*}
hwid=${name_hwid#*=}
if [ "$hwid" == "$attr_address" ] ; then
echo $name
exit 0
fi
[ "$name" == "$kname" ] && match=$name_hwid
done
# have not found matching hwid in config, see if we can use kernel name
if [ -n "$kname" ] ; then
# if interface missing entirely from config
# or it does not yet have a recorded hwid
# it is safe to use kernel name
if [[ -z "$match" || -z "${match#*=}" ]] ; then
echo $kname
exit 0
fi
# FIXME! need to figure out what to do here...
# The device mac address isn't yet in the config but the config
# has another hwid associated with the kernel name. This
# indicates that the device may have been replaced or a new device
# installed. Udev may not have scanned all devices yet so we
# donot know which case.
fi
exit 1
# Local Variables:
# mode: shell-script
# sh-indentation: 4
# End:
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