#!/bin/sh

# Sub-tests that require a mounted partition.

. /usr/share/os-prober/common.sh

set -e

do_unmount() {

	if [ "$mounted" ]; then

		umount "$tmpmnt/boot" 2>/dev/null || true

		if ! umount "$tmpmnt"; then

			warn "failed to umount $tmpmnt"

		fi

	fi

	for dm_device in $dm_devices; do

		if [ -e "$dm_device" ]; then

			debug "remove device mapper device $dm_device"

			dmsetup remove $dm_device

		fi

	done

	rmdir "$tmpmnt" || true

}

partition="$1"

types="$(fs_type "$partition")"

if [ "$types" = NOT-DETECTED ]; then

	debug "$1 type not recognised; skipping"

	exit 0

elif [ "$types" = swap ]; then

	debug "$1 is a swap partition; skipping"

	exit 0

elif [ "$types" = crypto_LUKS ]; then

	debug "$1 is a LUKS partition; skipping"

	exit 0

elif [ "$types" = ntfs ]; then

	if type ntfs-3g >/dev/null 2>&1; then

		types='ntfs-3g ntfs'

	fi

elif [ -z "$types" ]; then

	if is_dos_extended_partition "$partition"; then

		debug "$1 looks like an extended dos partition; skipping"

		exit 0

	fi

	if type cryptsetup >/dev/null 2>&1 && \

	   cryptsetup luksDump "$partition" >/dev/null 2>&1; then

		debug "$1 is a LUKS partition; skipping"

		exit 0

	fi

	types="$(grep -v nodev /proc/filesystems)"

fi

tmpmnt=/var/lib/os-prober/mount

if [ ! -d "$tmpmnt" ]; then

	mkdir "$tmpmnt"

fi

mounted=

dm_devices=

if type grub-mount >/dev/null 2>&1 && \

   type grub2-probe >/dev/null 2>&1 && \

   grub-mount "$partition" "$tmpmnt" 2>/dev/null; then

	mounted=1

	type="$(grub2-probe -d "$partition" -t fs)"

	[ "$type" ] || type=fuseblk

elif dm_device="$(do_dmsetup osprober-linux "$partition")" && \

     [ "$dm_device" ]; then

	dm_devices="$dm_device"

	for type in $types; do

		if mountinfo=`mount -o ro -t "$type" "$dm_device" "$tmpmnt" 2>&1;; then

			debug "mounted as $type filesystem"

			mounted=1

			break

		else

			debug "mounting $dm_device ($partition) as $type failed: $mountinfo"

		fi

	done

fi

if [ "$mounted" ]; then

	linux_mount_boot "$partition" "$tmpmnt"

	bootpart="${mountboot%% *}"

	mounted="${mountboot#* }"

	if [ "$dm_device" ]; then

		dm_devices="$dm_device $dm_devices"

	fi

	for test in /usr/libexec/linux-boot-probes/mounted/*; do

		if [ -f "$test" ] && [ -x "$test" ]; then

			debug "running $test $partition $bootpart $tmpmnt $type"

			if $test "$partition" "$bootpart" "$tmpmnt" "$type"; then

				debug "$test succeeded"

				do_unmount

				exit 0

			fi

		fi

	done

fi

do_unmount

# No tests found anything.

exit 1