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#!/bin/bash
# Copyright (C)  2018 Iru Cai <mytbk920423@gmail.com>
# SPDX-License-Identifier: GPL-3.0-or-later

# Example: ./install_syslinux /dev/sdb /dev/sdb1 /media/boot
set -e

mbr_bin_path=(/usr/lib/syslinux/bios /usr/share/syslinux /usr/lib/syslinux/mbr)
c32_path=(/usr/lib/syslinux/bios /usr/share/syslinux /usr/lib/syslinux/modules/bios)

MBR_PATH=""
C32_PATH=""

for path in "${mbr_bin_path[@]}"
do
	if test -f "$path/mbr.bin"
	then
		MBR_PATH="$path"
		break
	fi
done

if test -z "$MBR_PATH"
then
	exit 1
fi

for path in "${c32_path[@]}"
do
	if test -f "$path/linux.c32"
	then
		C32_PATH="$path"
		break
	fi
done

if test -z "$C32_PATH"
then
	exit 1
fi

DEVNAME="$1"
BOOTPART="$2"
BOOTPATH="$3"

syslinux -i "$BOOTPART"
dd bs=440 count=1 conv=notrunc if="$MBR_PATH/mbr.bin" of="$DEVNAME"
install -d "$BOOTPATH/syslinux"
cp "$C32_PATH"/*.c32 "$BOOTPATH/syslinux"