summaryrefslogtreecommitdiffstats
path: root/rescue/restore-image.sh
blob: b923a7a937ed253ae1ead5a561c30d38d905033d (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
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
#!/bin/bash

setterm -powersave off
setterm -blank 0

if [ -r ./restore-image-lib.sh ]; then
	. ./restore-image-lib.sh
elif [ -r /usr/lib/restore-image-lib.sh ]; then
	. /usr/lib/restore-image-lib.sh
fi

export PATH="/sbin:/bin:/usr/sbin:/usr/bin"

mnt_dir="/tmp/mnt"
restore_media="/tmp/media"
images_dir="$restore_media/images"
images="$images_dir/list"
images_config="$images_dir/config"
image=""
win32_part_dev=
win32_part_type=
win32_part_new_size=

function read_config()
{
    if [ -r "$images_config" ]; then
        . $images_config
    fi
}

function image_list()
{
	list=$(cat $images | awk -F',' \
		'{ print $1 " " $2 " " $4 }')

	echo $list
}

function image_file()
{
	country="$1"

	file=$(grep ^$country $images | awk -F',' '{ print $3 }')

	echo $file
}

function welcome()
{
	while true; do
		clear
		msg="\n       Welcome to $TITLE\n\
\nThe following images were found, select one:\n "
		opcao=$(dialog --backtitle "$BACKTITLE" --title "$TITLE" \
				--stdout --radiolist "$msg" 0 0 0 \
				$(image_list))

		if [ "$?" != "0" ]; then
			_yesno "\nInterrupt installation?\n "
			if [ "$?" = "0" ]; then
				_shutdown
			fi
		else
			if [ -z "$opcao" ]; then
				continue
			else
				image=$(image_file $opcao)
				break
			fi
		fi
	done

	# disable kernel messages in the console
	echo "1 4 1 7" > /proc/sys/kernel/printk
}

function install_warning()
{
	if [ -n "${win32_part_dev}" ]; then
	    warn_msg="Windows installation detected.\nWe will set it up as dual boot. \
You may lose some data.\nPlease backup before proceeding."
	else
	    warn_msg="WARNING: This process will erase all data in this machine, \
do you want to continue?"
	fi

	clear
	_yesno "\n$warn_msg\n"
	if [ "$?" != "0" ]; then
		_shutdown
	fi
}

function detect_root()
{
	inst_source_dev=$(sed '\|'$restore_media'|!d;s/[0-9] .*$//;s/^.*\///' /proc/mounts)
	devices=$(grep "^ .*[^0-9]$" < /proc/partitions | grep -v ${inst_source_dev} | awk '$3 > '$MIN_DISKSIZE' { print $4,$3 }')

	if [ -z "${devices}" ]; then
		exit 1
	fi

	devs_found=$(($(echo $devices | wc -w)/2))

	root_data=$(detect_win32 ${inst_source_dev})

	if [ -z "${root_data}" ]; then
		if [ "$devs_found" -gt "1" ]; then
 			if [ -n "${inst_source_dev}" ]; then
 				opcao=$(dialog --backtitle "$BACKTITLE" --title "$TITLE" --stdout --menu 'Choose one of the detected devices to restore to (check the blocks size column first):' 8 50 0 $devices )
 				if [ "$?" != "0" ]; then
 					_yesno "\nInterrupt installation?\n "
 					if [ "$?" = "0" ]; then
 						_shutdown
 					fi
 				else
 					root_data=${opcao}
 				fi 
 			fi
		else
		    root_data=$(echo ${devices} | cut -d ' ' -f 1)
		fi
	fi
	
	echo ${root_data}
}

function detect_win32()
{
	# from detect_root()
	skip_dev=${1}

	# win32 detection won't handle complex layouts
	if [ $(fdisk -l | grep "^/dev/" | grep -v ${skip_dev} | wc -l) -gt 1 ]; then
		exit
	fi

	# get the last created windows partition information
	set -f
	device=$(fdisk -l | grep "^/dev/" | grep -v ${skip_dev} | grep -e "FAT\|NTFS\|HPFS" | tail -1 | sed 's/ .*$//')
	set +f

	if [ -z "${device}" ]; then
		exit
	fi

	# it might be needed, for safety
	device_type=$(vol_id --type ${device})
	modprobe ${device_type}

	# df for that partition
	mount ${device} /mnt
	size=$(df ${device} | tail -1) 
	umount /mnt

	# its diskspace
	used=$(echo ${size} | awk '{ print $3 }')
	left=$(echo ${size} | awk '{ print $4 }')
	avail=$((${left}/2))

	if [ ! ${avail} -lt ${MIN_DISKSIZE} ]; then
		win32_part_dev=${device}
		win32_part_type=${device_type}
		# our install takes half of 'left'
		win32_part_new_size=$((${used}+${avail}))

		dev=${win32_part_dev#/dev/}
		disk=${dev%[0-9]}
		number=${dev#[a-w][a-w][a-w]}
		let number++
		echo ${disk}${number} ${win32_part_dev} ${win32_part_type} ${win32_part_new_size}
	fi
}

function resize_win32()
{
	device=${1}
	device_type=${2}
	new_win32_size=${3}

	dialog --backtitle "$BACKTITLE" --title "$TITLE" --infobox "\nResizing Windows partition...\n" 4 55

	dev=${device#/dev/}
	disk=${dev%[0-9]}
	win32_number=${dev#[a-w][a-w][a-w]}

	case ${device_type} in
		vfat) device_id=b  ;;
		ntfs) device_id=7  ;;
		hpfs) device_id=87 ;;
	esac

	# wrapper around libdrakx by blino
	diskdrake-resize ${device} ${device_type} $((${new_win32_size}*2)) &>/dev/null

	# we need some free sector here, rebuilding layout
	fdisk /dev/${disk} &>/dev/null <<EOF
d
n
p
${win32_number}

+${new_win32_size}K
t
${device_id}
a
${win32_number}
w
EOF
	# adds linux partition to the end of the working disk
	fdisk /dev/${disk} &>/dev/null <<EOF
n
p
$((${win32_number}+1))

+${MIN_DISKSIZE}K
t
$((${win32_number}+1))
83
w
EOF
}

function detect_device()
{
	dialog --backtitle "$BACKTITLE" --title "$TITLE" --infobox "\nTrying to detect your root partition and disk...\n" 4 55

	root_data=$(detect_root)
	if [ -z "${root_data}" ]; then
        	_msgbox "\nError writing image: disk device not detected.\n"
		# so that netbooks using USB sticks as disks can retry (like Gdium)
		welcome
		root_data=$(detect_root)
	fi
	set ${root_data}
	root=$1
	win32_part_dev=$2
	win32_part_type=$3
	win32_part_new_size=$4
}

function write_image()
{
	if [ -n "${win32_part_dev}" ]; then
		resize_win32 ${win32_part_dev} ${win32_part_type} ${win32_part_new_size}
	fi
	
	image=$(cat $images_dir/list | cut -d ',' -f 3)
	extension=$(echo $image | cut -d '.' -f 3)
	imagesize=$(ls -l $images_dir/$image | awk '{ print $5 }')
	case $extension in
		gz)
			uncomp=zcat
			total=$(gzip -l $images_dir/$image | tail -n 1 | awk '{ print $2 }')
			;;
		bz2)
			uncomp=bzcat
			total=$((imagesize * 3))
			;;
		*)
			uncomp=cat
			total=$imagesize
			;;
	esac

	skipstart=/bin/true
	if [ -n "$win32_part_dev" ]; then
		skipstart='dd of=/dev/null bs=1 count=32256'
	fi

	# the actual dumping command, from image to disk
	${uncomp} ${images_dir}/${image} | (${skipstart} &>/dev/null; dd bs=4M of=/dev/${root} >/tmp/backup.out 2>&1>>/tmp/log) &

	sleep 3
	pid=$(ps ax | grep 'dd bs=4M of' | grep -v grep | awk '{ print $1 }')

	while [ true ]; do
		ps | grep -q $pid
		if [ $? -eq 0 ]; then
			/bin/kill -SIGUSR1 $pid
			unit=$(tail -n 1 /tmp/backup.out | \
				cut -d'(' -f2 | cut -d')' -f1 |\
				awk '{ print $2 }')

			complete=$(tail -n 1 /tmp/backup.out | \
				cut -d'(' -f2 | cut -d')' -f1 | \
				awk '{ print $1 }' | cut -d'.' -f1)
			if [ x"$unit" = x"GB" ]; then
				complete=$((complete*1000))
			fi
			echo $((complete*100/total))
			sleep 1
		else
			break
		fi
	done | dialog --backtitle "$BACKTITLE" --title "$TITLE" --gauge "\nWriting image..." 8 45

	in=$(tail -n 3 /tmp/backup.out | grep 'in$' | cut -d' ' -f1)
	out=$(tail -n 3 /tmp/backup.out | grep 'out$' | cut -d' ' -f1)

	if [ x"$in" != x"$out" ]; then
		_msgbox "\nError writing image!\n"
		sleep 24h
	fi
}

function grub_setup()
{
		root=${1}
		grub_dir=${2}

		# install the bootloader
		grub <<EOF
device (hd0) /dev/${root%[0-9]}
root (hd0,1)
setup (hd0)
quit
EOF
		# change the partition order and boot timeout accordingly
		sed -i 's/(hd0,0)/(hd0,1)/g;/^timeout/s/$/0/' ${grub_dir}/menu.lst

		# dualboot configuration for grub
		cat >> ${grub_dir}/menu.lst <<EOF
title Microsoft Windows
root (hd0,0)
makeactive
rootnoverify(hd0,0)
chainloader +1
EOF
}

function expand_fs()
{
	if [ -z "$win32_part_dev" ]; then
		root=${root%[0-9]}1
	fi
	filesystem_type=$(dumpe2fs -h /dev/${root} 2>/dev/null| grep "Filesystem OS type" | awk '{ print $4 }')
	if [ "${filesystem_type}" = "Linux" ]; then
                dialog --backtitle "$BACKTITLE" --title "$TITLE" --infobox "Finishing Install... Expanding ${root}" 3 40
		disk=/dev/${root%[0-9]}
		main_part=/dev/${root}

		# FIXME: absurdly dirty hack
                num=${root##sda}
		let num++
		swap_part=/dev/${root%[0-9]}${num}

		main_part_sectors=
		if [ -n "$SWAP_BLOCKS" ]; then
		    if [ -n "$EXPAND_FS" ]; then
			total_blocks=$(sfdisk -s $disk)
			main_part_blocks=$((total_blocks-SWAP_BLOCKS))
			main_part_sectors=$((main_part_blocks*2))
		    else
	                main_part_sectors=$(sfdisk -d $disk | perl -lne 'm|^'$main_part'\b.*,\s*size\s*=\s*(\d+)\b| and print($1), exit')
		    fi
		fi
		if [ -n "$SWAP_BLOCKS" ]; then
		    parted $disk -- mkpartfs primary linux-swap ${main_part_sectors}s -1s yes
		    mkswap -L swap $swap_part
		fi
		if [ -n "$EXPAND_FS" ]; then
		    sfdisk -d $disk | sed -e "\|$main_part|  s/size=.*,/size= ,/" | sfdisk -f $disk
		    e2fsck -fy $main_part
		    resize2fs $main_part
		fi
		mkdir -p $mnt_dir
		mount $main_part $mnt_dir
		grub_dir="$mnt_dir/boot/grub"
		if [ -d "$grub_dir" ]; then
		    echo "(hd0) $disk" > "$grub_dir/device.map"
		    if [ -n "$win32_part_dev" ]; then
   	                grub_setup ${root} ${grub_dir}
                    fi
		fi
		if [ -n "$MKINITRD" ]; then
		    mount -t sysfs none "$mnt_dir/sys"
		    mount -t proc none "$mnt_dir/proc"
		    echo > /proc/sys/kernel/modprobe # rescue's modprobe does not handle modprobe -q and aliases
		    chroot $mnt_dir bootloader-config --action rebuild-initrds
		    umount "$mnt_dir/sys"
		    umount "$mnt_dir/proc"
		fi
		umount $mnt_dir
	fi
}

# installation steps
welcome
read_config
detect_device
install_warning
write_image
expand_fs

# all done!
_msgbox "\nInstallation process finished.\nPress ENTER to shutdown.\n "

_shutdown