source: bootscripts/contrib/hotplug/net.agent@ 055aa17

#!/bin/sh
#
# Network hotplug policy agent for LFS
#
# Kernel NET hotplug params include:
#       
#       ACTION=%s [register or unregister]
#       INTERFACE=%s
#
# HISTORY:
#
# 05-Mar-2005   Initial version of LFS Version
#
#

cd /etc/hotplug
. ./hotplug.functions
#DEBUG=yes export DEBUG

if [ "$INTERFACE" = "" ]; then
    mesg Bad NET invocation: \$INTERFACE is not set
    exit 1
fi

case $ACTION in
add|register)

    case $INTERFACE in
        # interfaces that are registered after being "up" (?)
        ppp*|ippp*|isdn*|plip*|lo*|irda*|dummy*|ipsec*|tun*|tap*)
            debug_mesg assuming $INTERFACE is already up
            exit 0
            ;;
        # interfaces that are registered then brought up
        *)
            # LFS
            export IN_HOTPLUG=1
            debug_mesg invoke ifup $INTERFACE
            exec /etc/sysconfig/network-devices/ifup $INTERFACE
            ;;
    esac
    mesg $1 $ACTION event not handled
    ;;

remove|unregister)

    case $INTERFACE in
        # interfaces that are unregistered after being "down" (?)
        ppp*|ippp*|isdn*|plip*|lo*|irda*|dummy*|ipsec*|tun*|tap*)
            debug_mesg assuming $INTERFACE is already down
            exit 0
            ;;
        *)
            # LFS
            export IN_HOTPLUG=1
                debug_mesg invoke ifdown $INTERFACE
                exec /etc/sysconfig/network-devices/ifdown $INTERFACE
            ;;
    esac
    mesg $1 $ACTION event not handled
    ;;

*)
    debug_mesg NET $ACTION event for $INTERFACE not supported
    exit 1 ;;

esac