aboutsummaryrefslogtreecommitdiffstats
path: root/scripts/mkefi-agl.sh
blob: 14ade366eacab00f7663006aef6d57169873ede3 (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
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
#!/bin/sh
#
# Copyright (c) 2012, Intel Corporation.
# All rights reserved.
#
# This program is free software;  you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY;  without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
# the GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program;  if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# Modification from mkefidisk.sh provided by the Yocto project by Dominig
# to install Automotive Grade Linux (AGL) on Minnowboard and any PC with UEFI boot
#
# changes
#         - simpler use model
#         - keep initrd if present
#         - create a grub config with PARTUID to ease boot from various devices automaticaly
#         - add a UEFI startup.nsh script for autoboot
#         - remove any configured swap is fstab
#         - accept .hddimg, wic and wic.xz as sources

LANG=C

# Set to 1 to enable additional output
DEBUG=0
exec 3>/dev/null

#
# Defaults
#
# 100 Mb for the boot partition
BOOT_SIZE=100
# min available space on TMP_DIR for uncompressing xz image in kB e.g. 5G (5000000)
TMP_SIZE_MIN=5000000
# TMP_DIR directory use for holding image file for uncompression (e.g. /tmp or $HOME)
TMP_DIR=/tmp

# Cleanup after die()
cleanup() {
	debug "Syncing and unmounting devices"
	# Unmount anything we mounted
	unmount $ROOTFS_MNT || error "Failed to unmount $ROOTFS_MNT"
	unmount $BOOTFS_MNT || error "Failed to unmount $BOOTFS_MNT"
	unmount $HDDIMG_ROOTFS_MNT || error "Failed to unmount $HDDIMG_ROOTFS_MNT"
    unmount $HDDIMG_MNT || error "Failed to unmount $HDDIMG_MNT"
	if [ "$IMG_TYPE" = "DISK" ]; then
        debug "de-attaching loop devices"
        for LOOP_DEVICE in `losetup --list |grep $HDDIMG | cut -d" " -f1` ; do
           losetup -d $LOOP_DEVICE  1>&3 2>&1 || error "Detaching $LOOP_DEVICE from $HDDIMG failled"
        done   
     fi

	# Remove the TMPDIR
	debug "Removing temporary files"
	if [ -d "$TMPDIR" ]; then
		rm -rf "$TMPDIR" || error "Failed to remove $TMPDIR"
	fi
        [ -f "$TMP_DIR/TMP-AGL-wic-image.wic" ] || rm -f $TMP_DIR/TMP-AGL-wic-image.wic
}

trap 'die "Signal Received, Aborting..."' HUP INT TERM

# Logging routines
WARNINGS=0
ERRORS=0
CLEAR="$(tput sgr0)"
INFO="$(tput bold)"
RED="$(tput setaf 1)$(tput bold)"
GREEN="$(tput setaf 2)$(tput bold)"
YELLOW="$(tput setaf 3)$(tput bold)"
info() {
	echo "${INFO}$1${CLEAR}"
}
error() {
	ERRORS=$((ERRORS+1))
	echo "${RED}$1${CLEAR}"
}
warn() {
	WARNINGS=$((WARNINGS+1))
	echo "${YELLOW}$1${CLEAR}"
}
success() {
	echo "${GREEN}$1${CLEAR}"
}
die() {
	error "$1"
	cleanup
	exit 1
}
debug() {
	if [ $DEBUG -eq 1 ]; then
		echo "$1"
	fi
}

usage() {
	echo "Install AGL on a removable device to boot on IA UEFI based computer"
	echo "In particular is can create USB or SD bootable support for Minnowboard"
	echo ""
	echo "Usage: $(basename $0) [-v] IDSK_IMAGE REMOVABLE_DEVICE"
	echo "       -v: Verbose debug"
	echo "       HDDIMG: The DISK_IMAGE file generated by Yocto the efi disk from"
        echo "               Supported formats are .hddimg, .wic .wic.xz"
	echo "       REMOVABLE_DEVICE: The block device to write the image to, e.g. /dev/sdh"
	echo "ex:"
	echo "   mkefi-agl.sh   agl-demo-platform-intel-corei7-64.hddimg /dev/sdd"
        echo "   mkefi-agl.sh   agl-demo-platform-intel-corei7-64.wic.xz /dev/sdd"
	exit 1
}

image_details() {
	IMG=$1
	info "Image details"
	echo "    image: $(stat --printf '%N\n' $IMG)"
	echo "     size: $(stat -L --printf '%s bytes\n' $IMG)"
	echo " modified: $(stat -L --printf '%y\n' $IMG)"
	echo "     type: $(file -L -b $IMG)"
	echo ""
}

device_details() {
	DEV=$1
	BLOCK_SIZE=512

	info "Device details"
	echo "  device: $DEVICE"
	if [ -f "/sys/class/block/$DEV/device/vendor" ]; then
		echo "  vendor: $(cat /sys/class/block/$DEV/device/vendor)"
	else
		echo "  vendor: UNKOWN"
	fi
	if [ -f "/sys/class/block/$DEV/device/model" ]; then
		echo "   model: $(cat /sys/class/block/$DEV/device/model)"
	else
		echo "   model: UNKNOWN"
	fi
	if [ -f "/sys/class/block/$DEV/size" ]; then
		echo "    size: $(($(cat /sys/class/block/$DEV/size) * $BLOCK_SIZE)) bytes"
	else
		echo "    size: UNKNOWN"
	fi
	echo ""
}

unmount_device() {
	grep -q $DEVICE /proc/mounts
	if [ $? -eq 0 ]; then
		warn "$DEVICE listed in /proc/mounts, attempting to unmount"
		umount $DEVICE* 2>/dev/null
		! grep -q $DEVICE /proc/mounts && info "Unmounted successfully"
		return $?
	fi
	return 0
}

unmount() {
	if [ "$1" = "" ] ; then
		return 0
	fi
	grep -q $1 /proc/mounts
	if [ $? -eq 0 ]; then
		debug "Unmounting $1"
		umount $1
		! grep -q $1 /proc/mounts # check if unmounted successfully
		return $?
	fi
	return 0
}

#
# Parse and validate arguments
#
if [ "$1" != "-v" ] && [ $# -ne 2 ]; then
        usage
fi
if [ "$1" = "-v" ] && [ $# -ne 3 ]; then
        usage
fi

if [ "$1" = "-v" ] ; then
	DEBUG=1
	exec 3>&1
	shift
fi

HDDIMG=$1
DEVICE=$2

LINK=$(readlink $DEVICE)
if [ $? -eq 0 ]; then
	DEVICE="$LINK"
fi

if [ ! -w "$DEVICE" ]; then
	if [ ! -e "${DEVICE}" ] ; then
		die "Device $DEVICE cannot be found"
	else
		die "Device $DEVICE is not writable (need to run under sudo?)"
	fi
fi

if [ ! -e "$HDDIMG" ]; then
	die "HDDIMG $HDDIMG does not exist"
fi
HDDIMG_EXT=${HDDIMG##*.}
case $HDDIMG_EXT in
  hddimg)
     IMG_TYPE="MOUNT"
     IMG_COMPRESS="NO"
     debug "Detected: uncompressed image type .hddimg"
     ;;
  wic)
     IMG_TYPE="DISK"
     IMG_COMPRESS="NO"
     debug "Detected: uncompressed image type .wic"
     ;;
  xz)
     IMG_TYPE="DISK"
     IMG_COMPRESS="YES"
     debug "Detected: xz compressed image type .wic"
     command -v xz >/dev/null 2>&1 || { die "xz command is not available, pleaes install xz package"; }
     TMP_SIZE=`df -k $TMP_DIR | awk '/[0-9]%/{print $(NF-2)}'`
     if [ "$TMP_SIZE" -lt "$TMP_SIZE_MIN" ]; then
       die "Available space on $TMP_DIR must be at least $TMP_SIZE_MIN kB" 
     fi
     printf "Starting decompression of the image. It may take some time ..."
     xz --decompress --keep --format=auto --force --threads=0 --stdout > $TMP_DIR/TMP-AGL-wic-image.wic  $HDDIMG|| \
         die "xz command failled: xz --decompress --keep --format=auto --force --threads=0 --stdout > $TMP_DIR/TMP-AGL-wic-image.wic"
     HDDIMG="$TMP_DIR/TMP-AGL-wic-image.wic"
     echo "Image uncompressed, starting doing real work ..."
     ;;
  *)
     die "Unsupported image format: $HDDIMG_EXT Supported format are .hddimg .wic wic.xz"
     ;;
esac

#
# Ensure the hddimg is not mounted
#
debug "will now try to umount /detach previous images"
case $IMG_TYPE in
  MOUNT)
      unmount "$HDDIMG" || die "Failed to unmount $HDDIMG"
      ;;
  DISK)
      [ `losetup --list |grep $HDDIMG | wc -l ` -gt 1 ] && die "Image mounted more than once, manual cleaning required see: losetup --list"
      debug "ready to attach the wic image to aloop device"
      LOOP_DEVICE=`losetup --find --show $HDDIMG`  && ( losetup -d $LOOP_DEVICE  1>&3 2>&1 || die "Detaching $LOOP_DEVICE from $HDDIMG failled")
      ;;
  *)
      die "unknown image format $IMG_TYPE"
      ;;
esac

#
# Check if any $DEVICE partitions are mounted
#
unmount_device || die "Failed to unmount $DEVICE"

#
# Confirm device with user
#
image_details $HDDIMG
device_details $(basename $DEVICE)
echo -n "${INFO}Prepare EFI image on $DEVICE [y/N]?${CLEAR} "
read RESPONSE
if [ "$RESPONSE" != "y" ]; then
	die "Image creation aborted"
fi


#
# Prepare the temporary working space
#
TMPDIR=$(mktemp -d mkefidisk-XXX) || die "Failed to create temporary mounting directory."
HDDIMG_MNT=$TMPDIR/hddimg
HDDIMG_ROOTFS_MNT=$TMPDIR/hddimg_rootfs
ROOTFS_MNT=$TMPDIR/rootfs
BOOTFS_MNT=$TMPDIR/bootfs
mkdir $HDDIMG_MNT || die "Failed to create $HDDIMG_MNT"
mkdir $HDDIMG_ROOTFS_MNT || die "Failed to create $HDDIMG_ROOTFS_MNT"
mkdir $ROOTFS_MNT || die "Failed to create $ROOTFS_MNT"
mkdir $BOOTFS_MNT || die "Failed to create $BOOTFS_MNT"


#
# Partition $DEVICE
#
DEVICE_SIZE=$(parted -s $DEVICE unit mb print | grep ^Disk | cut -d" " -f 3 | sed -e "s/MB//")
# If the device size is not reported there may not be a valid label
if [ "$DEVICE_SIZE" = "" ] ; then
	parted -s $DEVICE mklabel msdos || die "Failed to create MSDOS partition table"
	DEVICE_SIZE=$(parted -s $DEVICE unit mb print | grep ^Disk | cut -d" " -f 3 | sed -e "s/MB//")
fi
ROOTFS_SIZE=$((DEVICE_SIZE-BOOT_SIZE))
ROOTFS_START=$((BOOT_SIZE))
ROOTFS_END=$((ROOTFS_START+ROOTFS_SIZE))

# MMC devices use a partition prefix character 'p'
PART_PREFIX=""
if [ ! "${DEVICE#/dev/mmcblk}" = "${DEVICE}" ] || [ ! "${DEVICE#/dev/nvme0n}" = "${DEVICE}" ] || [ ! "${DEVICE#/dev/loop}" = "${DEVICE}" ]; then
	PART_PREFIX="p"
fi
BOOTFS=$DEVICE${PART_PREFIX}1
ROOTFS=$DEVICE${PART_PREFIX}2

TARGET_PART_PREFIX=""
if [ ! "${TARGET_DEVICE#/dev/mmcblk}" = "${TARGET_DEVICE}" ] || [ ! "${TARGET_DEVICE#/dev/nvme0n}" = "${TARGET_DEVICE}" ]; then
	TARGET_PART_PREFIX="p"
fi
TARGET_ROOTFS=$TARGET_DEVICE${TARGET_PART_PREFIX}2

echo ""
info "Boot partition size:   $BOOT_SIZE MB ($BOOTFS)"
info "ROOTFS partition size: $ROOTFS_SIZE MB ($ROOTFS)"
echo ""

# Use MSDOS by default as GPT cannot be reliably distributed in disk image form
# as it requires the backup table to be on the last block of the device, which
# of course varies from device to device.

info "Partitioning installation media ($DEVICE)"

debug "Deleting partition table on $DEVICE"
dd if=/dev/zero of=$DEVICE bs=512 count=2 1>&3 2>&1 || die "Failed to zero beginning of $DEVICE"

debug "Creating new partition table (MSDOS) on $DEVICE"
parted -s $DEVICE mklabel msdos 1>&3 2>&1 || die "Failed to create MSDOS partition table"

debug "Creating boot partition on $BOOTFS"
parted -s $DEVICE mkpart primary 0% $BOOT_SIZE 1>&3 2>&1 || die "Failed to create BOOT partition"

debug "Enabling boot flag on $BOOTFS"
parted -s $DEVICE set 1 boot on 1>&3 2>&1 || die "Failed to enable boot flag"

debug "Creating ROOTFS partition on $ROOTFS"
parted -s $DEVICE mkpart primary $ROOTFS_START $ROOTFS_END 1>&3 2>&1 || die "Failed to create ROOTFS partition"

# as blkid does not provide PARTUUID on Ubuntu LTS 14.04 we myst hack via fdisk
#ROOTFS_PARTUUID=$(blkid |grep -e "$ROOTFS" |sed -n 's/^.*PARTUUID=/PARTUUID=/p')
export LC_ALL=C
ROOTFS_DISKID=$(fdisk -l "$DEVICE" | grep -e "Disk identifier" | sed -n 's/^.*Disk identifier: 0x/PARTUUID=/p')
if [ $ROOTFS_DISKID = "" ]; then
    die "Failed to read DISKID"
fi
ROOTFS_PARTUUID="$ROOTFS_DISKID-02"
debug "PARTUUID for ROOTFS is $ROOTFS_PARTUUID"

if [ $DEBUG -eq 1 ]; then
	parted -s $DEVICE print
fi


#
# Check if any $DEVICE partitions are mounted after partitioning
#
unmount_device || die "Failed to unmount $DEVICE partitions"


#
# Format $DEVICE partitions
#
info "Formatting partitions"
debug "Formatting $BOOTFS as vfat"
if [ ! "${DEVICE#/dev/loop}" = "${DEVICE}" ]; then
	mkfs.vfat -I $BOOTFS -n "EFI" 1>&3 2>&1 || die "Failed to format $BOOTFS"
else
	mkfs.vfat $BOOTFS -n "EFI" 1>&3 2>&1 || die "Failed to format $BOOTFS"
fi

debug "Formatting $ROOTFS as ext4"
mkfs.ext4 -F $ROOTFS -L "ROOT" 1>&3 2>&1 || die "Failed to format $ROOTFS"


#
# Mounting image file system on loop devices
#
case $IMG_TYPE in

  MOUNT) 
     debug "Mounting images and device in preparation for installation"
     mount -o loop $HDDIMG $HDDIMG_MNT 1>&3 2>&1 || die "Failed to mount $HDDIMG"
     mount -o loop $HDDIMG_MNT/rootfs.img $HDDIMG_ROOTFS_MNT 1>&3 2>&1 || die "Failed to mount rootfs.img"
     ;;
  DISK)
     debug "Attaching image and mounting partitions then device in preparation for installation"
     LOOP_DEVICE=`losetup --find` || die "Failled to find an available loop device see: losetup --find"
     losetup -P $LOOP_DEVICE $HDDIMG  1>&3 2>&1 || die "Attaching $LOOP_DEVICE from $HDDIMG failled"
     mount "$LOOP_DEVICE"p2  $HDDIMG_ROOTFS_MNT 1>&3 2>&1 || die "Failed to mount $LOOP_DEVICEp1 on $HDDIMG_ROOTFS_MNT"
     mount "$LOOP_DEVICE"p1  $HDDIMG_MNT       1>&3 2>&1 || die "Failed to mount $LOOP_DEVICEp2 on $HDDIMG_MNT"
     ;;
  *)
      die "unknown image format $IMG_TYPE"
      ;;
esac
# Mount removable device
     mount $ROOTFS $ROOTFS_MNT 1>&3 2>&1 || die "Failed to mount $ROOTFS on $ROOTFS_MNT"
     mount $BOOTFS $BOOTFS_MNT 1>&3 2>&1 || die "Failed to mount $BOOTFS on $BOOTFS_MNT"


info "Preparing boot partition"
EFIDIR="$BOOTFS_MNT/EFI/BOOT"
if [ -f $HDDIMG_MNT/vmlinuz ]; then
   cp $HDDIMG_MNT/vmlinuz $BOOTFS_MNT 1>&3 2>&1 || die "Failed to copy vmlinuz"
   KERNEL_TYPE="VMLINUZ"
   debug "kernel is vmlinuz"
fi
if [ -f $HDDIMG_MNT/bzimage ]; then
   cp $HDDIMG_MNT/bzimage $BOOTFS_MNT 1>&3 2>&1 || die "Failed to copy bzimage"
   KERNEL_TYPE="BZIMAGE"
   debug "kernel is bzimage"
fi
if [ -f $HDDIMG_MNT/microcode.cpio ]; then
   cp $HDDIMG_MNT/microcode.cpio $BOOTFS_MNT 1>&3 2>&1 || die "Failed to copy microcode.cpio"
   debug "microcode.cpio copied"
fi
[ -z $KERNEL_TYPE ] && die "Linux kernel type in $HDDIMG is unsupported"

if [ -f $HDDIMG_MNT/initrd ]
  then
    echo "initrd detected"
    cp $HDDIMG_MNT/initrd $BOOTFS_MNT 1>&3 2>&1 || die "Failed to copy initrd"
  else
    warn "initrd missing"
fi
echo "bootx64.efi" > $BOOTFS_MNT/startup.nsh || die "Failed to create startup.nsh"
# Copy the efi loader and configs (booti*.efi and grub.cfg if it exists)
cp -r $HDDIMG_MNT/EFI $BOOTFS_MNT 1>&3 2>&1 || die "Failed to copy EFI dir"
# Silently ignore a missing systemd-boot or gummiboot loader dir (we might just be a GRUB image)
cp -r $HDDIMG_MNT/loader $BOOTFS_MNT 1>&3 2>&1

# Update the boot loaders configurations for an installed image
# Remove any existing root= kernel parameters and:
# o Add a root= parameter with the target rootfs
# o Specify ro so fsck can be run during boot
# o Specify rootwait in case the target media is an asyncronous block device
#   such as MMC or USB disks
# o Specify "quiet" to minimize boot time when using slow serial consoles

# Look for a GRUB installation
GRUB_CFG="$EFIDIR/grub.cfg"
if [ -e "$GRUB_CFG" ]; then
	info "Configuring GRUB"
	# Delete the install entry
	sed -i "/menuentry 'install'/,/^}/d" $GRUB_CFG
	# Delete any LABEL= strings
	sed -i "s/ LABEL=[^ ]*/ /" $GRUB_CFG
        # detect config initrd=microcode.cpio
        if  grep -q microcode $GRUB_CFG; then
            warn "initrd=microcode.cpio detected, might not work on all boot configurations"
        fi
	sed -i "s@ root=[^ ]*@ @" $GRUB_CFG
	sed -i "s@vmlinuz @vmlinuz root=$ROOTFS_PARTUUID @" $GRUB_CFG
fi

# look for a systemd-boot loader.conf file and create a default boot entry
SYSTEMDBOOT_CFG="$BOOTFS_MNT/loader/loader.conf"
if [ -e "$SYSTEMDBOOT_CFG" ]; then
	info "Configuring SYSTEMD-BOOT"
    SYSTEMDBOOT_BOOT="$BOOTFS_MNT/loader/entries/boot.conf"
    SYSTEMDBOOT_DEBUG="$BOOTFS_MNT/loader/entries/debug.conf"
    # Delete the install entry
	sed -i "/menuentry 'install'/,/^}/d" $SYSTEMDBOOT_CFG
	rm -rf "$BOOTFS_MNT/loader/entries/install.conf" 1>&3 2>&1
	# Add PARTUUID to the boot entry file
	if [ ! -e "$SYSTEMDBOOT_BOOT" ]; then
        die "no boot.conf entry found in systemd-boot directories"
    fi
	# Delete any LABEL= strings
	sed -i "s/ LABEL=[^ ]*/ /" $SYSTEMDBOOT_BOOT
        # detect config initrd=microcode.cpio
        if  grep -q microcode $SYSTEMDBOOT_BOOT; then
            warn "initrd=microcode.cpio detected, might not work on all boot configurations"
        fi
	sed -i "s@ root=[^ ]*@ @" $SYSTEMDBOOT_BOOT
	sed -i "s@options @options root=$ROOTFS_PARTUUID @" $SYSTEMDBOOT_BOOT
fi


# Ensure we have at least one EFI bootloader configured
if [ ! -e $GRUB_CFG ]  && [ ! -e $SYSTEMDBOOT_CFG ] ; then
	die "No EFI bootloader configuration found"
fi

printf "Copying ROOTFS files ... "
command -v rsync >/dev/null 2>&1 # check if rsync exists
if [ $DEBUG -eq 1 ] && [ $? -eq 0 ]; then
	rsync --info=progress2 -h -aHAXW --no-compress  $HDDIMG_ROOTFS_MNT/* $ROOTFS_MNT 1>&3 2>&1 || die "Root FS copy failed"
else
	cp -a $HDDIMG_ROOTFS_MNT/* $ROOTFS_MNT 1>&3 2>&1 || die "Root FS copy failed"
fi
debug "removing any swap entry in /etc/fstab"
sed --in-place '/swap/d' $ROOTFS_MNT/etc/fstab 

printf "flushing data on removable device. May take a while ... "
sync --file-system $ROOTFS_MNT
echo done

# We dont want udev to mount our root device while we're booting...
if [ -d $ROOTFS_MNT/etc/udev/ ] ; then
	echo "$TARGET_DEVICE" >> $ROOTFS_MNT/etc/udev/mount.blacklist
fi


# Call cleanup to unmount devices and images and remove the TMPDIR
cleanup

echo ""
if [ $WARNINGS -ne 0 ] && [ $ERRORS -eq 0 ]; then
	echo "${YELLOW}Installation completed with warnings${CLEAR}"
	echo "${YELLOW}Warnings: $WARNINGS${CLEAR}"
elif [ $ERRORS -ne 0 ]; then
	echo "${RED}Installation encountered errors${CLEAR}"
	echo "${RED}Errors: $ERRORS${CLEAR}"
	echo "${YELLOW}Warnings: $WARNINGS${CLEAR}"
else
	success "Installation completed successfully"
fi
echo ""