[....]

pci_boot_events ()
{
    #
    # FIXME on 2.5, /sys/bus/pci/devices gives some of this
    # information, and more can be gotten with 'lspci'.
    # don't expect pcimodules to exist!!
    #
    LISTER=`type -p pcimodules`
    if [ "$LISTER" = "" -o ! -f /proc/bus/pci/devices -o ! -x pci.agent ]; then
	    echo $"** can't synthesize pci hotplug events"
	    return
    fi

    # make sure the pci agent will run
    export ACTION=add
    export PCI_CLASS=0
    export PCI_ID=0:0
    export PCI_SLOT=0:0.0
    export PCI_SUBSYS_ID=0:0

    # these notifications will be handled by pcimodules
    gawk -F' ' '{printf("%s:%s\n",toupper(substr($2,0,4)), toupper(substr($2,5,4)) )}' /proc/bus/pci/devices |
    while read PCI_ID; do
	/sbin/hotplug pci
    done
}

[....]