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|
#!/bin/sh
. common.sh
DEVNAME=$1
case "$DEVNAME" in /dev/loop*|/dev/ram*|/dev/dm-*|/dev/md*|/dev/fd*) exit ;; esac
[ -b "$DEVNAME" ] || exit
debug_log "grok-block.${DEVNAME##*/}"
addmenu_repairhfs()
{
local device="$1"
addmenu "$device//reboot" \
"[ Reboot into Mac OS X in order to repair disk $device ]" \
"eject /cdrom; sleep 2; reboot -f"
addmenu "$device//fsck" \
"[ (DANGEROUS) Try to repair errors on $device with fsck.hfsplus ]" \
"/bin/openvt -sw -- sh -c 'fsck.hfsplus $device && remenu'"
}
addmenu_chooseroot()
{
local device="$1" loopfile="$2"
addmenu "$device//$loopfile" \
"[ Boot the system on $device${loopfile:+ in file $(basename $loopfile)} ]" \
"menu-select --fs=$ID_FS_TYPE boot-luks $device ${loopfile:-$device}"
}
addmenu_choose_native_root()
{
local device="$1" loopfile="$2"
addmenu "$device//$device" \
"[ Boot the system on $device ]" \
"menu-select --fs=$ID_FS_TYPE boot-native $device"
}
addmenu_makeroot()
{
local device="$1" loopfile="$2" megs="$3" copy_cdrom="$4"
(
addmenu "$device//$loopfile" \
"[ Install Samizdat to $device (in file $(basename $loopfile)) ]" \
"menu-select --fs=$ID_FS_TYPE boot-new $device $loopfile $megs $copy_cdrom"
) &
}
addmenu_destroy_hard_drive()
{
local device="$1"
(
addmenu "$device//$device" \
"[ Install Samizdat to $device -- THIS DESTROYS ALL DATA ]" \
"menu-select boot-destroy-disk $device"
) &
}
retry_mount()
{
tries=20
until mntout="$(mount "$@" 2>&1)"
do
tries=$(( tries - 1 ))
case "$mntout" in
*"Device or resource busy"*)
if [ $tries -le 0 ]; then
warn "mount $@ failed: $mntout"
return 1
else
sleep 1
continue
fi
;;
*)
warn "mount $@ failed: $mntout"
break ;;
esac
done
}
is_lvm()
{
for n in 0 1 2 3; do
[ "LVM2 001" = "$(dd if="$1" bs=1 skip=$((512*n+24)) count=8 2>/dev/null)" ] && return 0
done
return 1
}
is_device_without_partitions()
{
case "$1" in /dev/nbd*|/dev/sr*|*[0-9]) return 1 ;; esac
[ "$(parted -sm "$1" print | grep -c :)" = 1 ]
}
is_incomplete_samizdat_install()
{
# TODO: Possibly only some of the partitions are incomplete
local partition_names="$(parted -sm "$1" print | sed 1,2d | awk -F: -e '{printf "%s:", $6}')"
[ "$partition_names" = 'samizdat-grub-incomplete:samizdat-plaintext-incomplete:samizdat-luks-encrypted-incomplete:' ]
}
parent_device()
{
local d="$1"
while [ "$d" != "${d%[0-9]}" ]; do d=${d%[0-9]}; done
printf '%s' "$d"
}
wait_for_files_()
{
: wait_for_files: Polling...
(
set +x
local f
for f in "$@"; do
while ! [ -e "$f" ]; do sleep 0.1; done
done
)
: wait_for_files: ...finished.
}
grok_block()
{
local mountpoint="/mnt/${DEVNAME##*/}"
mkdir -p "$mountpoint"
case "$ID_FS_TYPE" in
ntfs) mount_type='-t ntfs-3g' ;;
"") mount_type= ;;
*) mount_type="-t $ID_FS_TYPE" ;;
esac
# Skip partitions that we created.
# The name 'samizdat-plaintext' is recognized and used to add the menu entry, below.
case "$DEVNAME" in
# Avoid mouting this multiple times in case this script gets called multiple times,
# because while it's mounted, the dmsetup stuff will fail with device busy.
/dev/nbd0)
bootdone nbd0-dev
return ;;
/dev/nbd1)
bootwait nbd-script nbd0-dev
wait_for_files_ /sys/block/nbd0/pid /sys/block/nbd1/pid
;;
esac
case "$ID_PART_ENTRY_NAME" in
samizdat-*-incomplete|samizdat-plaintext|samizdat-keys|samizdat-grub) return ;;
samizdat-rootfs) ;;
samizdat-luks-encrypted)
if ! [ -f /autobooted ]
then
touch /autobooted
menu-select boot-native "$(parent_device "$DEVNAME")"
return
fi
;;
esac
if [ "$ID_FS_TYPE" = btrfs ]; then
btrfs device ready "$DEVNAME"
fi
if [ "$ID_FS_TYPE" = hfsplus ] && ! fsck.hfsplus -q "$DEVNAME"; then
(if fsck.hfsplus "$DEVNAME"; then
grok-block "$DEVNAME"
else
addmenu_repairhfs "$DEVNAME"
fi) &
return
fi
if ! mountpoint -q "$mountpoint"; then
if [ "$DEVNAME" = /dev/nbd1 ]
then OPTIONS='-o device=/dev/nbd0'
else OPTIONS=
fi
retry_mount $mount_type -r $OPTIONS "$DEVNAME" "$mountpoint"
fi
if ! mountpoint -q "$mountpoint"; then
rmdir "$mountpoint"
is_device_without_partitions "$DEVNAME" ||
is_incomplete_samizdat_install "$DEVNAME" &&
addmenu_destroy_hard_drive "$DEVNAME"
elif [ "$ID_PART_ENTRY_NAME" = samizdat-rootfs ]; then
bootdone samizdat-rootfs
elif [ "$DEVNAME" = /dev/nbd1 ]; then
# This is our rootfs, over the network
umount "$mountpoint"
rmdir "$mountpoint"
bootdone samizdat-nbd-dev
else
umount "$mountpoint"
rmdir "$mountpoint"
fi
}
# Get me all them nice udev variables
eval "$(PATH=$PATH:/lib/udev vol_id "$DEVNAME" |
sed "s/'/'\\\\''/; s/=\(.*\)/='\1'/"
)"
grok_block &
# vim:set et sw=2:
|
