Mini Shell

#!/bin/sh

if getargbool 0 rd.md.waitclean; then
    type getarg >/dev/null 2>&1 || . /lib/dracut-lib.sh
    containers=""
    for md in /dev/md[0-9_]*; do
        [ -b "$md" ] || continue
        udevinfo="$(udevadm info --query=env --name=$md)"
        strstr "$udevinfo" "DEVTYPE=partition" && continue
        if strstr "$udevinfo" "MD_LEVEL=container"; then
            containers="$containers $md"
            continue
        fi
        info "Waiting for $md to become clean"
        mdadm -W "$md" >/dev/null 2>&1
    done

    for md in $containers; do
        info "Waiting for $md to become clean"
        mdadm -W "$md" >/dev/null 2>&1
    done

    unset containers udevinfo
fi