#!/bin/ash
# -----------------------------------------------------------------------------
#
# Copyright (c) 2014..2018 bwLehrpool-Projektteam
#
# This program/file is free software distributed under the GPL version 2.
# See https://www.gnu.org/licenses/old-licenses/gpl-2.0-standalone.html
#
# If you have any feedback please consult https://bwlehrpool.de and
# send your feedback to support@bwlehrpool.de.
#
# General information about bwLehrpool can be found at https://bwlehrpool.de
#
# -----------------------------------------------------------------------------

# Partition IDs
# Prefix for all partitions is 0FC63DAF-8483-4772-8E79-9999999999
# Suffix:
#  44: non-persistent scratch partition
#  45: persistent partition
#  46: non-persistent openslx partition for config, overlayfs and qcow images

# We use special non assigned partition type for harddisk scratch
# space, thus no normal filesystem will be incidentally deleted or
# corrupted

PREFIX=/mnt

# Set disks to none
ID44=
ID45=
ID46=

# Mountpoints
ID44MNT=/tmp
ID45MNT=/opt/openslx/mnt/persistent
ID46MNT=/opt/openslx/mnt/non-persistent

# General formatter for the /tmp partition on a local harddisk
diskfm () {
	mopt="" # Global var!
	local target="$1"
	local fslist="xfs jfs ext4"
	local fs
	local path
	[ $# -ge 2 ] && fslist="$2"
	for fs in $fslist ; do
		unset available
		case $(cat /proc/filesystems) in
			*${fs}*) available=yes;;
			*) modprobe "${fs}" && available=yes;;
		esac
		if [ -n "${available}" ]; then
			unset found
			if which "mkfs.$fs" ; then
				found=yes
				case "mkfs.$fs" in
					mkfs.xfs)
						fopt="-fq"
					;;
					mkfs.jfs)
						fopt="-q"
					;;
					mkfs.ext4)
						fopt="-Fq"
					;;
				esac
				mkfs.$fs ${fopt} "${target}"
			fi
			[ -n "$found" ] && break
		fi
	done
}

# Format and mount ID44 (/tmp)
mount_id44 () {
	HAVE_TMP=no
	if echo $ID44 | grep -q '/dev/disk/'
		then
		# check for supported filesystem and formatter
		if diskfm $ID44; then
			mkdir -p $PREFIX$ID44MNT
			if mount -t auto "$ID44" "$PREFIX$ID44MNT" 2>/dev/null
				then
				chmod a+rwxt $PREFIX$ID44MNT
				echo -e "$ID44\t$ID44MNT\tauto\tnoexec\t0 0" >> "/etc/fstab"
				HAVE_TMP=yes
			else
				echo "Could not mount partition $ID44"
			fi
		else
			echo "Could not format partition $ID44"
		fi
	fi
}

# Mount persistent partition 45
mount_id45 () {
	HAVE_PERSISTENT=no
	if echo $ID45 | grep -q '/dev/disk/'
		then
		mkdir -p $PREFIX$ID45MNT
		if mount -t auto "$ID45" "$PREFIX$ID45MNT" 2>/dev/null
			then
			echo -e "$ID45\t$ID45MNT\tauto\tnoauto\t0 0" >> "/etc/fstab"
			HAVE_PERSISTENT=yes
		else
			echo "Could not mount persistent partition $ID45"
		fi
	fi
}

# Mount non-persistent partition 46
mount_id46 () {
	HAVE_NONPERSISTENT=no
	if echo $ID46 | grep -q '/dev/disk/'
		then
		# check for supported filesystem and formatter
		if diskfm $ID46; then
			mkdir -p $PREFIX$ID46MNT
			if mount -t auto -o noexec "$ID46" "$PREFIX$ID46MNT" 2>/dev/null
				then
				echo -e "$ID46\t$ID46MNT\tauto\tnoauto,noexec\t0 0" >> "/etc/fstab"
				HAVE_NONPERSISTENT=yes
			else
				echo "Could not mount non-persistent partition $ID46"
			fi
		else
			echo "Could not format partition $ID44"
		fi
	fi
}

# Get partition types
hdisks=$(ls /dev/disk/by-path/*-part[0-9]* \
         | sed -re "s,(.*)-part[0-9]*,\1," \
         | sort -u)

if echo $hdisks | grep -q '/dev/disk/'
	then
	for hd in $(echo $hdisks)
		do
		upartid=$(sgdisk -p $hd 2>/dev/null | awk '$6~/FFFF/ {print $1}')
		for upt in $(echo $upartid)
			do
			echo "${hd}-part${upt} $(sgdisk -i $upt $hd)" \
			  | awk '$5 ~ /0FC63DAF-8483-4772-8E79-[0]{10}4[4-6]/ \
			         {print $5 "=" $1}' \
			  | sed -re "s,0FC63DAF-8483-4772-8E79-[0]{10},ID," \
			  >> /etc/hdisks.conf
		done
	done
        [ -r /etc/hdisks.conf ] && . /etc/hdisks.conf

fi