#!/bin/bash

# called by dracut
check() {
    local _arch=${DRACUT_ARCH:-$(uname -m)}
    local _online=0
    [ "$_arch" = "s390" -o "$_arch" = "s390x" ] || return 1
    dracut_module_included network || return 1

    [[ $hostonly ]] && {
        for i in /sys/devices/qeth/*/online; do
            [ ! -f "$i" ] && continue
            read -r _online < "$i"
            [ "$_online" -eq 1 ] && return 0
        done
    }
    return 255
}

# called by dracut
installkernel() {
    instmods qeth
}

# called by dracut
install() {
    ccwid() {
        qeth_path=$(readlink -e -q "$1"/device)
        basename "$qeth_path"
    }

    inst_rules_qeth() {
        for rule in /etc/udev/rules.d/{4,5}1-qeth-${1}.rules; do
            # prefer chzdev generated 41- rules
            if [ -f "$rule" ]; then
                inst_rules "$rule"
                break
            fi
        done
    }

    has_carrier() {
        carrier=0
        # not readable in qeth interfaces
        # that have just been assembled, ignore
        # read error and assume no carrier
        read -r carrier 2> /dev/null < "$1/carrier"
        [ "$carrier" -eq 1 ] && return 0
        return 1
    }

    for dev in /sys/class/net/*; do
        has_carrier "$dev" || continue
        id=$(ccwid "$dev")
        [ -n "$id" ] && inst_rules_qeth "$id"
    done

}