#!/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 $tmpmnt"
		fi
	fi
	rmdir "$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=
if type grub-mount >/dev/null 2>&1 && \
   type grub-probe >/dev/null 2>&1 && \
   grub-mount "$partition" "$tmpmnt" 2>/dev/null; then
	mounted=1
	type="$(grub-probe -d "$partition" -t fs)"
	[ "$type" ] || type=fuseblk

	case "$type" in
	    btrfs)
			if [ -x "$tmpmnt/@/lib" ] && \
			   ! mount --bind "$tmpmnt/@" "$tmpmnt"; then
				warn "failed to mount btrfs subvolume @ on $partition"
				if ! umount $tmpmnt; then
					warn "failed to umount $tmpmnt"
				fi
				mounted=
			fi
			;;
	esac
fi

if [ "$mounted" ]; then
	linux_mount_boot "$partition" "$tmpmnt"
	bootpart="${mountboot%% *}"
	mounted="${mountboot#* }"

	for test in /usr/lib/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