#!/bin/sh
# Sub-tests that require a mounted partition.
set -e
partition="$1"

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

types="$(fs_type "$partition")" || types=NOT-DETECTED
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 "$types" ]; then
if type cryptsetup >/dev/null 2>&1 && \
cryptsetup luksDump "$partition" >/dev/null 2>&1; then
debug "$1 is a LUKS partition; skipping"
exit 0
fi
for type in $(grep -v nodev /proc/filesystems); do
# hfsplus filesystems are mountable as hfs. Try hfs last so
# that we can tell the difference.
if [ "$type" = hfs ]; then
delaytypes="${delaytypes:+$delaytypes }$type"
elif [ "$type" = fuseblk ]; then
if type ntfs-3g >/dev/null 2>&1; then
types="${types:+$types }ntfs-3g"
fi
else
types="${types:+$types }$type"
fi
done
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)" || true
if [ "$type" ]; then
debug "mounted using GRUB $type filesystem driver"
else
debug "mounted using GRUB, but unknown filesystem?"
type=fuseblk
fi
else
ro_partition "$partition"
for type in $types $delaytypes; do
if mount -o ro -t "$type" "$partition" "$tmpmnt" 2>/dev/null; then
debug "mounted as $type filesystem"
case "$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
mounted=1
break
fi
done
fi

if [ "$mounted" ]; then
for test in /usr/lib/os-probes/mounted/*; do
debug "running subtest $test"
if [ -f "$test" ] && [ -x "$test" ]; then
if "$test" "$partition" "$tmpmnt" "$type"; then
debug "os found by subtest $test"
if ! umount "$tmpmnt"; then
warn "failed to umount $tmpmnt"
fi
case "$type" in
btrfs)
# umount to account for the bind-mount
if [ -x "$tmpmnt/@/lib" ] && \
! umount $tmpmnt; then
warn "failed to umount $tmpmnt"
fi
;;
esac
rmdir "$tmpmnt" || true
exit 0
fi
fi
done
if ! umount "$tmpmnt"; then
warn "failed to umount $tmpmnt"
fi
fi

rmdir "$tmpmnt" || true

# No tests found anything.
exit 1