blob: 3f45bb2f30c32d028e02d42e7db2e549172d9a75 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
|
#!/bin/sh
. common.sh
DEVNAME=$1
case "$DEVNAME" in /dev/loop*|/dev/ram*|/dev/dm-*|/dev/md*) 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
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:
|
