Revonzy Mini Shell

#!/bin/sh
# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
# ex: ts=8 sw=4 sts=4 et filetype=sh

if [[ -f /etc/kernel/cmdline ]]; then
    readarray -t BOOT_OPTIONS < /etc/kernel/cmdline
fi

if ! [[ "${BOOT_OPTIONS[@]}" ]]; then
    readarray -t BOOT_OPTIONS < /proc/cmdline
fi

unset noimageifnotneeded

for ((i=0; i < "${#BOOT_OPTIONS[@]}"; i++)); do
    if [[ ${BOOT_OPTIONS[$i]} == root\=PARTUUID\=* ]]; then
        noimageifnotneeded="yes"
        break
    fi
done

ret=0
case "$1" in
    add)
	dracut ${noimageifnotneeded:+--noimageifnotneeded} "$3"/initrd "$2"
        ret=$?
	;;
    remove)
        rm -f -- "$3"/initrd
        ret=$?
	;;
esac
exit $ret