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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_choosekey()
{
dev=$1
dir=$2
addmenu "$dev//$dir" \
"[ Use the GPG key on $dev ]" \
"menu-select boot-gpg $dev $dir"
}
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_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 $copy_cdrom"
) &
}
retry_mount()
{
tries=20
until mntout="$(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
}
gpg_verify()
{
bootwait samizdat-cdrom
gpg2 --lock-never --no-permission-warning --no-auto-check-trustdb --no-options --homedir /cdrom/samizdat/gpg/gnupghome --verify "$1"
}
is_lvm()
{
for n in 0 1 2 3; do
[ "LVM2 001" = "$(dd if="$1" bs=1 skip=$((512*n+24)) count=8 2>/dev/null)" ] && return 0
done
return 1
}
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 $ID_FS_TYPE" ;;
esac
if [ "$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
retry_mount $mount_type -o ro "$DEVNAME" "$mountpoint"
fi
if mountpoint -q "$mountpoint"; then
umount=true
# Device has an unencrypted filesystem on it.
# So we mount it and look for loop-back overlays.
if [ -d "$mountpoint/samizdat.gpg" ]; then
# check the key somehow?
addmenu_choosekey "$DEVNAME" "$mountpoint/samizdat.gpg"
fi
N=1; while [ -e "$mountpoint/samizdat.$N" ]
do
if gpg_verify "$mountpoint/samizdat.$N"k; then
addmenu_chooseroot "$DEVNAME" "$mountpoint/samizdat.$N"
# this menu entry chooses the root fs, and should prompt and wait for the matching key
umount=false
fi
N=$((N+1))
done
freeblocks=$(stat -f -c %f "$mountpoint")
blocksize=$(stat -f -c %S "$mountpoint")
freemegs=$((freeblocks * blocksize / 1024 / 1024))
if [ "$freemegs" -ge 300 ]; then
umount=false
bootwait samizdat-cdrom
cdromblocks=$(stat -f -c %b /cdrom)
cdromblocksize=$(stat -f -c %S /cdrom)
cdrommegs=$((cdromblocks * cdromblocksize / 1024 / 1024))
if [ "$freemegs" -ge "$((cdrommegs * 3))" ]; then
addmenu_makeroot "$DEVNAME" "${mountpoint}/samizdat.$N" "$((cdrommegs * 3))" 1
elif [ "$freemegs" -ge "$((cdrommegs * 2))" ]; then
addmenu_makeroot "$DEVNAME" "${mountpoint}/samizdat.$N" "$((cdrommegs * 2))" 1
elif [ "$freemegs" -ge "$cdrommegs" ]; then
addmenu_makeroot "$DEVNAME" "${mountpoint}/samizdat.$N" "$((freemegs / 2))" 0
else
addmenu_makeroot "$DEVNAME" "${mountpoint}/samizdat.$N" 256 0
fi
fi
if $umount; then
umount "$mountpoint"
rmdir "$mountpoint"
fi
else
rmdir "$mountpoint"
fi
}
# Get me all them nice udev variables
eval "$(PATH=$PATH:/lib/udev vol_id "$DEVNAME" |
sed "s/'/'\\\\''/; s/=\(.*\)/='\1'/"
)"
CDROM_ID_FS_UUID_ENC='73256269-4002-4e42-adbd-0e49ed1c7438'
CDROM_ID_FS_LABEL_ENC=$(sed 's/ /\\x20/g' /lib/samizdat/vol_id.txt)
if [ "$ID_FS_UUID_ENC" = "$CDROM_ID_FS_UUID_ENC" -o \
"$ID_FS_LABEL_ENC" = "$CDROM_ID_FS_LABEL_ENC" ]
then
# Recognize and mount the Samizdat
if ! mountpoint -q /cdrom; then
mkdir -p /cdrom
(retry_mount -t iso9660 -r "$DEVNAME" /cdrom && bootdone samizdat-cdrom) &
fi
else
grok_block &
fi
# vim:set et sw=2:
|
