udev rules ordered interface

indexer

#!/bin/sh

#if [ $# -lt 1 ]; then
#    echo "Usage: $0 prefix [initial] [database/file] " >&2
#    exit 1
#fi

key="${1:-"eth"}"
initial="${2:-0}"
datfile="${3:-/run/indexerdb_$key}"
lockfile="${datfile}.lck"

(
    flock -x 9
    num=$initial
    if [ -e "$datfile" ]; then
        read -r num < "$datfile"
    fi

    next=`expr $num + 1`;
    echo $next > "$datfile"

    echo "$key$num"
) 9> "$lockfile"

udevd.rules

SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="?*", ATTRS{class}=="0x0200*", PROGRAM="/opt/bin/indexer eth" NAME:="%c"