Mini Shell

#!/usr/bin/bash

# called by dracut
check() {
    return 255
}

# called by dracut
depends() {
    return 0
}

# called by dracut
install() {
    return 0
}

installkernel() {
    local -A _drivers
    local _wdtdrv

    for _wd in /sys/class/watchdog/*; do
        ! [ -e "$_wd" ] && continue
        _wdtdrv=$(get_dev_module "$_wd")
        if [[ $_wdtdrv ]]; then
            instmods "$_wdtdrv"
            for i in $_wdtdrv; do
                _drivers[$i]=1
            done
        fi
    done

    # ensure that watchdog module is loaded as early as possible
    if [[ ${!_drivers[*]} ]]; then
        echo "rd.driver.pre=\"$(
            IFS=,
            echo "${!_drivers[*]}"
        )\"" > "${initdir}"/etc/cmdline.d/00-watchdog.conf
    fi
    return 0
}