#!/bin/sh

#

# EFI boot manager tomfoolery v0.1

# (C) 2025 Pegasus Epsilon <pegasus@pimpninjas.org>

# Distribute Unmodified - https://pegasus.pimpninjas.org/license

OSNAME="Artix Linux"

EFIMOUNT=/EFI

EFIPATH=/EFI/Artix

EFIDISK=/dev/sdc

EFIPART=1

ROOTDEV=/dev/sdc2

KERNEL=$EFIPATH/vmlinuz-linux-zen

UCODE=$EFIPATH/amd-ucode.img

INITRD=$EFIPATH/initramfs-linux-zen.img

CMDLINE="modules=btrfs root=$ROOTDEV rootflags=subvol=artix rw"

CMDLINE="$CMDLINE initrd=$UCODE"

CMDLINE="$CMDLINE initrd=$INITRD"

if [ "$(id -u)" != "0" ]; then

echo Must be root, sorry.

exit

fi

if ! [ -f "$EFIMOUNT$KERNEL" ]; then

echo Kernel $EFIMOUNT$KERNEL not found

exit

fi

if ! [ -f "$EFIMOUNT$UCODE" ]; then

echo WARNING: $EFIMOUNT$UCODE not found

exit

fi

if ! [ -f "$EFIMOUNT$INITRD" ]; then

echo InitRD $EFIMOUNT$INITRD not found

exit

fi

case "$1" in

"boot" | "reboot")

next=$(efibootmgr | awk -F '[t*]' "BEGIN{IGNORECASE=1}/$2/{print \$2;exit}")

if [ "$next" ]; then

efibootmgr -n $next &>/dev/null && \

if [ "$3" = "now" ]; then

echo Rebooting into $2 now

reboot

else

echo "Selected $2 (Boot$next) for next boot"

fi

else

echo No boot entry for $2 found

fi

;;

"del" | "remove")

while : ; do

current=$(efibootmgr | awk -F '[t*]' "/$OSNAME/{print \$2}")

if [ "$current" ]; then

efibootmgr -B -b $current &>/dev/null && \

echo Successfully removed boot entry for $OSNAME

else

echo There is no EFI boot entry for $OSNAME

break

fi

done

;;

"add" | "install")

efibootmgr --create --label "$OSNAME" \

--disk $EFIDISK --part $EFIPART \

--loader $KERNEL --unicode "$CMDLINE" --verbose &>/dev/null && \

echo Successfully added boot entry for $OSNAME

#efibootmgr --create --label "$OSNAME (Rescue Mode)" \

# --disk $EFIDISK --part $EFIPART \

# --loader $KERNEL --unicode "init=/bin/sh $CMDLINE" --verbose &>/dev/null && \

# echo "Successfully added boot entry for $OSNAME (Rescue Mode)"

;;

"reinstall")

$0 remove

$0 install

;;

*)

echo Missing or invalid EFI command

esac