This file is indexed.

/sbin/fsadm is in lvm2 2.02.176-4.1ubuntu3.

This file is owned by root:root, with mode 0o755.

The actual contents of the file can be viewed below.

  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
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
#!/bin/bash
#
# Copyright (C) 2007-2017 Red Hat, Inc. All rights reserved.
#
# This file is part of LVM2.
#
# This copyrighted material is made available to anyone wishing to use,
# modify, copy, or redistribute it subject to the terms and conditions
# of the GNU General Public License v.2.
#
# 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
#
# Author: Zdenek Kabelac <zkabelac at redhat.com>
#
# Script for resizing devices (usable for LVM resize)
#
# Needed utilities:
#   mount, umount, grep, readlink, blockdev, blkid, fsck, xfs_check, cryptsetup
#
# ext2/ext3/ext4: resize2fs, tune2fs
# reiserfs: resize_reiserfs, reiserfstune
# xfs: xfs_growfs, xfs_info
#
# Return values:
#   0 success
#   1 error
#   2 break detected
#   3 unsupported online filesystem check for given mounted fs

TOOL=fsadm

_SAVEPATH=$PATH
PATH="/sbin:/usr/sbin:/bin:/usr/sbin:$PATH"

# utilities
TUNE_EXT=tune2fs
RESIZE_EXT=resize2fs
TUNE_REISER=reiserfstune
RESIZE_REISER=resize_reiserfs
TUNE_XFS=xfs_info
RESIZE_XFS=xfs_growfs

MOUNT=mount
UMOUNT=umount
MKDIR=mkdir
RMDIR=rmdir
BLOCKDEV=blockdev
BLKID=blkid
DATE=date
GREP=grep
READLINK=readlink
READLINK_E="-e"
FSCK=fsck
XFS_CHECK=xfs_check
# XFS_REPAIR -n is used when XFS_CHECK is not found
XFS_REPAIR=xfs_repair
CRYPTSETUP=cryptsetup

# user may override lvm location by setting LVM_BINARY
LVM=${LVM_BINARY:-lvm}

YES=${_FSADM_YES}
DRY=0
VERB=
FORCE=
EXTOFF=${_FSADM_EXTOFF:-0}
DO_LVRESIZE=0
FSTYPE=unknown
VOLUME=unknown
TEMPDIR="${TMPDIR:-/tmp}/${TOOL}_${RANDOM}$$/m"
DM_DEV_DIR="${DM_DEV_DIR:-/dev}"
BLOCKSIZE=
BLOCKCOUNT=
MOUNTPOINT=
MOUNTED=
REMOUNT=
PROCDIR="/proc"
PROCMOUNTS="$PROCDIR/mounts"
PROCSELFMOUNTINFO="$PROCDIR/self/mountinfo"
NULL="$DM_DEV_DIR/null"

IFS_OLD=$IFS
# without bash $'\n'
NL='
'

tool_usage() {
	echo "${TOOL}: Utility to resize or check the filesystem on a device"
	echo
	echo "  ${TOOL} [options] check <device>"
	echo "    - Check the filesystem on device using fsck"
	echo
	echo "  ${TOOL} [options] resize <device> [<new_size>[BKMGTPE]]"
	echo "    - Change the size of the filesystem on device to new_size"
	echo
	echo "  Options:"
	echo "    -h | --help         Show this help message"
	echo "    -v | --verbose      Be verbose"
	echo "    -e | --ext-offline  unmount filesystem before ext2/ext3/ext4 resize"
	echo "    -f | --force        Bypass sanity checks"
	echo "    -n | --dry-run      Print commands without running them"
	echo "    -l | --lvresize     Resize given device (if it is LVM device)"
	echo "    -c | --cryptresize  Resize given crypt device"
	echo "    -y | --yes          Answer \"yes\" at any prompts"
	echo
	echo "  new_size - Absolute number of filesystem blocks to be in the filesystem,"
	echo "             or an absolute size using a suffix (in powers of 1024)."
	echo "             If new_size is not supplied, the whole device is used."

	exit
}

verbose() {
	test -z "$VERB" || echo "$TOOL:" "$@"
}

# Support multi-line error messages
error() {
	for i in "$@" ;  do
		echo "$TOOL: $i" >&2
	done
	cleanup 1
}

dry() {
	if [ "$DRY" -ne 0 ]; then
		verbose "Dry execution" "$@"
		return 0
	fi
	verbose "Executing" "$@"
	"$@"
}

cleanup() {
	trap '' 2
	# reset MOUNTPOINT - avoid recursion
	test "$MOUNTPOINT" = "$TEMPDIR" && MOUNTPOINT="" temp_umount
	if [ -n "$REMOUNT" ]; then
		verbose "Remounting unmounted filesystem back"
		dry "$MOUNT" "$VOLUME" "$MOUNTED"
	fi
	IFS=$IFS_OLD
	trap 2

	test "$1" -eq 2 && verbose "Break detected"

	if [ "$DO_LVRESIZE" -eq 2 ]; then
		# start LVRESIZE with the filesystem modification flag
		# and allow recursive call of fsadm
		_FSADM_YES=$YES
		_FSADM_EXTOFF=$EXTOFF
		export _FSADM_YES _FSADM_EXTOFF
		unset FSADM_RUNNING
		test -n "$LVM_BINARY" && PATH=$_SAVEPATH
		dry exec "$LVM" lvresize $VERB $FORCE -r -L"${NEWSIZE_ORIG}b" "$VOLUME_ORIG"
	fi

	# error exit status for break
	exit "${1:-1}"
}

# convert parameter from Exa/Peta/Tera/Giga/Mega/Kilo/Bytes and blocks
# (2^(60/50/40/30/20/10/0))
decode_size() {
	case "$1" in
	 *[eE]) NEWSIZE=$(( ${1%[eE]} * 1152921504606846976 )) ;;
	 *[pP]) NEWSIZE=$(( ${1%[pP]} * 1125899906842624 )) ;;
	 *[tT]) NEWSIZE=$(( ${1%[tT]} * 1099511627776 )) ;;
	 *[gG]) NEWSIZE=$(( ${1%[gG]} * 1073741824 )) ;;
	 *[mM]) NEWSIZE=$(( ${1%[mM]} * 1048576 )) ;;
	 *[kK]) NEWSIZE=$(( ${1%[kK]} * 1024 )) ;;
	 *[bB]) NEWSIZE=${1%[bB]} ;;
	     *) NEWSIZE=$(( $1 * $2 )) ;;
	esac
	#NEWBLOCKCOUNT=$(round_block_size $NEWSIZE $2)
	NEWBLOCKCOUNT=$(( NEWSIZE / $2 ))

	if [ "$DO_LVRESIZE" -eq 1 ]; then
		# start lvresize, but first cleanup mounted dirs
		DO_LVRESIZE=2
		cleanup 0
	fi
}

decode_major_minor() {
	# 0x00000fff00  mask MAJOR
	# 0xfffff000ff  mask MINOR

	#MINOR=$(( $1 / 1048576 ))
	#MAJOR=$(( ($1 - ${MINOR} * 1048576) / 256 ))
	#MINOR=$(( $1 - ${MINOR} * 1048576 - ${MAJOR} * 256 + ${MINOR} * 256))

	echo "$(( ( $1 >> 8 ) & 4095 )):$(( ( ( $1 >> 12 ) & 268435200 ) | ( $1 & 255 ) ))"
}

# detect filesystem on the given device
# dereference device name if it is symbolic link
detect_fs() {
	test -n "$VOLUME_ORIG" || VOLUME_ORIG=$1
	VOLUME=${1/#"${DM_DEV_DIR}/"/}
	VOLUME=$("$READLINK" $READLINK_E "$DM_DEV_DIR/$VOLUME")
	test -n "$VOLUME" || error "Cannot get readlink \"$1\"."
	RVOLUME=$VOLUME
	case "$RVOLUME" in
	  # hardcoded /dev  since udev does not create these entries elsewhere
	  /dev/dm-[0-9]*)
		read -r <"/sys/block/${RVOLUME#/dev/}/dm/name" SYSVOLUME 2>&1 && VOLUME="$DM_DEV_DIR/mapper/$SYSVOLUME"
		read -r <"/sys/block/${RVOLUME#/dev/}/dev" MAJORMINOR 2>&1 || error "Cannot get major:minor for \"$VOLUME\"."
		MAJOR=${MAJORMINOR%%:*}
		MINOR=${MAJORMINOR##*:}
		;;
	  *)
		STAT=$(stat --format "MAJOR=\$((0x%t)) MINOR=\$((0x%T))" "$RVOLUME")
		test -n "$STAT" || error "Cannot get major:minor for \"$VOLUME\"."
		eval "$STAT"
		MAJORMINOR="${MAJOR}:${MINOR}"
		;;
	esac
	# use null device as cache file to be sure about the result
	# not using option '-o value' to be compatible with older version of blkid
	FSTYPE=$("$BLKID" -c "$NULL" -s TYPE "$VOLUME")
	test -n "$FSTYPE" || error "Cannot get FSTYPE of \"$VOLUME\"."
	FSTYPE=${FSTYPE##*TYPE=\"} # cut quotation marks
	FSTYPE=${FSTYPE%%\"*}
	verbose "\"$FSTYPE\" filesystem found on \"$VOLUME\"."
}


# Check that passed mounted MAJOR:MINOR is not matching $MAJOR:MINOR of resized $VOLUME
validate_mounted_major_minor() {
	test "$1" = "$MAJORMINOR" || {
		local REFNAME
		local CURNAME
		REFNAME=$(dmsetup info -c -j "${1%%:*}" -m "${1##*:}" -o name --noheadings 2>/dev/null)
		CURNAME=$(dmsetup info -c -j "$MAJOR" -m "$MINOR" -o name --noheadings 2>/dev/null)
		error "Cannot ${CHECK+CHECK}${RESIZE+RESIZE} device \"$VOLUME\" without umounting filesystem $MOUNTED first." \
		      "Mounted filesystem is using device $CURNAME, but referenced device is $REFNAME." \
		      "Filesystem utilities currently do not support renamed devices."
	}
}

# ATM fsresize & fsck tools are not able to work properly
# when mounted device has changed its name.
# So whenever such device no longer exists with original name
# abort further command processing
check_valid_mounted_device() {
	local MOUNTEDMAJORMINOR
	local VOL
	local CURNAME
	local SUGGEST="Possibly device \"$1\" has been renamed to \"$CURNAME\"?"

	VOL=$("$READLINK" $READLINK_E "$1")
	CURNAME=$(dmsetup info -c -j "$MAJOR" -m "$MINOR" -o name --noheadings)
	# more confused, device is not DM....
	test -n "$CURNAME" || SUGGEST="Mounted volume is not a device mapper device???"

	test -n "$VOL" ||
		error "Cannot access device \"$1\" referenced by mounted filesystem \"$MOUNTED\"." \
		"$SUGGEST" \
		"Filesystem utilities currently do not support renamed devices."

	case "$VOL" in
	  # hardcoded /dev  since udev does not create these entries elsewhere
	  /dev/dm-[0-9]*)
		read -r <"/sys/block/${VOL#/dev/}/dev" MOUNTEDMAJORMINOR 2>&1 || error "Cannot get major:minor for \"$VOLUME\"."
		;;
	  *)
		STAT=$(stat --format "MOUNTEDMAJORMINOR=\$((0x%t)):\$((0x%T))" "$VOL")
		test -n "$STAT" || error "Cannot get major:minor for \"$VOLUME\"."
		eval "$STAT"
		;;
	esac

	validate_mounted_major_minor "$MOUNTEDMAJORMINOR"
}

detect_mounted_with_proc_self_mountinfo() {
	# Check self mountinfo
	# grab major:minor mounted_device mount_point
	MOUNTED=$("$GREP" "^[0-9]* [0-9]* $MAJORMINOR " "$PROCSELFMOUNTINFO" 2>/dev/null | head -1)

	# If device is opened and not yet found as self mounted
	# check all other mountinfos (since it can be mounted in cgroups)
	# Use 'find' to not fail on to long list of args with too many pids
	# only 1st. line is needed
	test -z "$MOUNTED" &&
		test "$(dmsetup info -c --noheading -o open -j "$MAJOR" -m "$MINOR")" -gt 0 &&
		MOUNTED=$(find "$PROCDIR" -maxdepth 2 -name mountinfo -print0 |  xargs -0 "$GREP" "^[0-9]* [0-9]* $MAJORMINOR " 2>/dev/null | head -1 2>/dev/null)

	# TODO: for performance compare with sed and stop with 1st. match:
	# sed -n "/$MAJORMINOR/ {;p;q;}"

	# extract 2nd field after ' - ' separator as mouted device
	MOUNTDEV=$(echo "${MOUNTED##* - }" | cut -d ' ' -f 2)
	MOUNTDEV=$(echo -n -e "$MOUNTDEV")

	# extract 5th field as mount point
	# echo -e translates \040 to spaces
	MOUNTED=$(echo "$MOUNTED" | cut -d ' ' -f 5)
	MOUNTED=$(echo -n -e "$MOUNTED")

	test -n "$MOUNTED" || return 1   # Not seen mounted anywhere

	check_valid_mounted_device "$MOUNTDEV"
}

# With older systems without /proc/*/mountinfo we may need to check
# every mount point as cannot easily depend on the name of mounted
# device (which could have been renamed).
# We need to visit every mount point and check it's major minor
detect_mounted_with_proc_mounts() {
	MOUNTED=$("$GREP" "^$VOLUME[ \t]" "$PROCMOUNTS")

	# for empty string try again with real volume name
	test -z "$MOUNTED" && MOUNTED=$("$GREP" "^$RVOLUME[ \t]" "$PROCMOUNTS")

	MOUNTDEV=$(echo -n -e "${MOUNTED%% *}")
	# cut device name prefix and trim everything past mountpoint
	# echo translates \040 to spaces
	MOUNTED=${MOUNTED#* }
	MOUNTED=$(echo -n -e "${MOUNTED%% *}")

	# for systems with different device names - check also mount output
	if test -z "$MOUNTED" ; then
		# will not work with spaces in paths
		MOUNTED=$(LC_ALL=C "$MOUNT" | "$GREP" "^$VOLUME[ \t]")
		test -z "$MOUNTED" && MOUNTED=$(LC_ALL=C "$MOUNT" | "$GREP" "^$RVOLUME[ \t]")
		MOUNTDEV=${MOUNTED%% on *}
		MOUNTED=${MOUNTED##* on }
		MOUNTED=${MOUNTED% type *} # allow type in the mount name
	fi

	if test -n "$MOUNTED" ; then
		check_valid_mounted_device "$MOUNTDEV"
		return 0  # mounted
	fi

	# If still nothing found and volume is in use
	# check every known mount point against MAJOR:MINOR
	if test "$(dmsetup info -c --noheading -o open -j "$MAJOR" -m "$MINOR")" -gt 0 ; then
		while IFS=$'\n' read -r i ; do
			MOUNTDEV=$(echo -n -e "${i%% *}")
			MOUNTED=${i#* }
			MOUNTED=$(echo -n -e "${MOUNTED%% *}")
			STAT=$(stat --format "%d" "$MOUNTED")
			validate_mounted_major_minor "$(decode_major_minor "$STAT")"
		done < "$PROCMOUNTS"
	fi

	return 1  # nothing is mounted
}

# check if the given device is already mounted and where
# FIXME: resolve swap usage and device stacking
detect_mounted() {
	if test -e "$PROCSELFMOUNTINFO"; then
		detect_mounted_with_proc_self_mountinfo
	elif test -e "$PROCMOUNTS"; then
		detect_mounted_with_proc_mounts
	else
		error "Cannot detect mounted device \"$VOLUME\"."
	fi
}

# get the full size of device in bytes
detect_device_size() {
	# check if blockdev supports getsize64
	"$BLOCKDEV" --help 2>&1 | "$GREP" getsize64 >"$NULL"
	if test $? -eq 0; then
		DEVSIZE=$("$BLOCKDEV" --getsize64 "$VOLUME")
		test -n "$DEVSIZE" || error "Cannot read size of device \"$VOLUME\"."
	else
		DEVSIZE=$("$BLOCKDEV" --getsize "$VOLUME")
		test -n "$DEVSIZE" || error "Cannot read size of device \"$VOLUME\"."
		SSSIZE=$("$BLOCKDEV" --getss "$VOLUME")
		test -n "$SSSIZE" || error "Cannot read sector size of device \"$VOLUME\"."
		DEVSIZE=$(("$DEVSIZE" * "$SSSIZE"))
	fi
}

# round up $1 / $2
# could be needed to gaurantee 'at least given size'
# but it makes many troubles
round_up_block_size() {
	echo $(( ($1 + $2 - 1) / $2 ))
}

temp_mount() {
	dry "$MKDIR" -p -m 0000 "$TEMPDIR" || error "Failed to create $TEMPDIR."
	dry "$MOUNT" "$VOLUME" "$TEMPDIR" || error "Failed to mount $TEMPDIR."
}

temp_umount() {
	dry "$UMOUNT" "$TEMPDIR" || error "Failed to umount \"$TEMPDIR\"."
	dry "$RMDIR" "${TEMPDIR}" || error "Failed to remove \"$TEMPDIR\","
	dry "$RMDIR" "${TEMPDIR%%m}" || error "Failed to remove \"${TEMPDIR%%m}\"."
}

yes_no() {
	echo -n "$@" "? [Y|n] "

	if [ -n "$YES" ]; then
		echo y ; return 0
	fi

	while read -r -s -n 1 ANS ; do
		case "$ANS" in
		 "y" | "Y" ) echo y ; return 0 ;;
		 "n" | "N") break ;;
		 "" ) if [ -t 1 ] ; then
			echo y ; return 0
		      fi ;;
		esac
	done

	echo n
	return 1
}

try_umount() {
	yes_no "Do you want to unmount \"$MOUNTED\"" && dry "$UMOUNT" "$MOUNTED" && return 0
	error "Cannot proceed with mounted filesystem \"$MOUNTED\"."
}

validate_parsing() {
	if test -z "$BLOCKSIZE" || test -z "$BLOCKCOUNT" ; then
		error "Cannot parse $1 output."
	fi
}
####################################
# Resize ext2/ext3/ext4 filesystem
# - unmounted or mounted for upsize
# - unmounted for downsize
####################################
resize_ext() {
	local IS_MOUNTED=0
	detect_mounted && IS_MOUNTED=1

	verbose "Parsing $TUNE_EXT -l \"$VOLUME\""
	for i in $(LC_ALL=C "$TUNE_EXT" -l "$VOLUME"); do
		case "$i" in
		  "Block size"*) BLOCKSIZE=${i##*  } ;;
		  "Block count"*) BLOCKCOUNT=${i##*  } ;;
		esac
	done
	validate_parsing "$TUNE_EXT"
	decode_size "$1" "$BLOCKSIZE"
	FSFORCE=$FORCE

	if test "$NEWBLOCKCOUNT" -lt "$BLOCKCOUNT" || test "$EXTOFF" -eq 1 ; then
		test "$IS_MOUNTED" -eq 1 && verbose "$RESIZE_EXT needs unmounted filesystem" && try_umount
		REMOUNT=$MOUNTED
		if test -n "$MOUNTED" ; then
			# Forced fsck -f for umounted extX filesystem.
			case "$-" in
			  *i*) dry "$FSCK" $YES -f "$VOLUME" ;;
			  *) dry "$FSCK" -f -p "$VOLUME" ;;
			esac
		fi
	fi

	verbose "Resizing filesystem on device \"$VOLUME\" to $NEWSIZE bytes ($BLOCKCOUNT -> $NEWBLOCKCOUNT blocks of $BLOCKSIZE bytes)"
	dry "$RESIZE_EXT" $FSFORCE "$VOLUME" "$NEWBLOCKCOUNT"
}

#############################
# Resize reiserfs filesystem
# - unmounted for upsize
# - unmounted for downsize
#############################
resize_reiser() {
	detect_mounted && verbose "ReiserFS resizes only unmounted filesystem" && try_umount
	REMOUNT=$MOUNTED
	verbose "Parsing $TUNE_REISER \"$VOLUME\""
	for i in $(LC_ALL=C "$TUNE_REISER" "$VOLUME"); do
		case "$i" in
		  "Blocksize"*) BLOCKSIZE=${i##*: } ;;
		  "Count of blocks"*) BLOCKCOUNT=${i##*: } ;;
		esac
	done
	validate_parsing "$TUNE_REISER"
	decode_size "$1" "$BLOCKSIZE"
	verbose "Resizing \"$VOLUME\" $BLOCKCOUNT -> $NEWBLOCKCOUNT blocks ($NEWSIZE bytes, bs: $NEWBLOCKCOUNT)"
	if [ -n "$YES" ]; then
		echo y | dry "$RESIZE_REISER" -s "$NEWSIZE" "$VOLUME"
	else
		dry "$RESIZE_REISER" -s "$NEWSIZE" "$VOLUME"
	fi
}

########################
# Resize XFS filesystem
# - mounted for upsize
# - cannot downsize
########################
resize_xfs() {
	detect_mounted
	MOUNTPOINT=$MOUNTED
	if [ -z "$MOUNTED" ]; then
		MOUNTPOINT=$TEMPDIR
		temp_mount || error "Cannot mount Xfs filesystem."
	fi
	verbose "Parsing $TUNE_XFS \"$MOUNTPOINT\""
	for i in $(LC_ALL=C "$TUNE_XFS" "$MOUNTPOINT"); do
		case "$i" in
		  "data"*) BLOCKSIZE=${i##*bsize=} ; BLOCKCOUNT=${i##*blocks=} ;;
		esac
	done
	BLOCKSIZE=${BLOCKSIZE%%[^0-9]*}
	BLOCKCOUNT=${BLOCKCOUNT%%[^0-9]*}
	validate_parsing "$TUNE_XFS"
	decode_size "$1" "$BLOCKSIZE"
	if [ "$NEWBLOCKCOUNT" -gt "$BLOCKCOUNT" ]; then
		verbose "Resizing Xfs mounted on \"$MOUNTPOINT\" to fill device \"$VOLUME\""
		dry "$RESIZE_XFS" "$MOUNTPOINT"
	elif [ "$NEWBLOCKCOUNT" -eq "$BLOCKCOUNT" ]; then
		verbose "Xfs filesystem already has the right size"
	else
		error "Xfs filesystem shrinking is unsupported."
	fi
}

# Find active LUKS device on original volume
# 1) look for LUKS device with well-known UUID format (CRYPT-LUKS[12]-<uuid>-<dmname>)
# 2) the dm-crypt device has to be on top of original device (dont't support detached LUKS headers)
detect_luks_device() {
	local _LUKS_VERSION
	local _LUKS_UUID

	CRYPT_NAME=""
	CRYPT_DATA_OFFSET=""

	_LUKS_VERSION=$($CRYPTSETUP luksDump $VOLUME 2> /dev/null | $GREP "Version:")

	if [ -z "$_LUKS_VERSION" ]; then
		verbose "Failed to parse LUKS version on volume \"$VOLUME\""
		return
	fi

	_LUKS_VERSION=${_LUKS_VERSION//[Version:[:space:]]/}

	_LUKS_UUID=$($CRYPTSETUP luksDump $VOLUME 2> /dev/null | $GREP "UUID:")

	if [ -z "$_LUKS_UUID" ]; then
		verbose "Failed to parse LUKS UUID on volume \"$VOLUME\""
		return
	fi

	_LUKS_UUID="CRYPT-LUKS$_LUKS_VERSION-${_LUKS_UUID//[UID:[:space:]-]/}-"

	CRYPT_NAME=$(dmsetup info -c --noheadings -S "UUID=~^$_LUKS_UUID&&segments=1&&devnos_used='$MAJOR:$MINOR'" -o name)
	test -z "$CRYPT_NAME" || CRYPT_DATA_OFFSET=$(dmsetup table $CRYPT_NAME | cut -d ' ' -f 8)

	# LUKS device must be active and mapped over volume where detected
	if [ -z "$CRYPT_NAME" -o -z "$CRYPT_DATA_OFFSET" ]; then
		error "Can not find active LUKS device. Unlock \"$VOLUME\" volume first."
	fi
}

######################################
# Resize active LUKS device
# - LUKS must be active for fs resize
######################################
resize_luks() {
	local L_NEWSIZE
	local L_NEWBLOCKCOUNT
	local NAME
	local SHRINK=0

	detect_luks_device

	NAME=$CRYPT_NAME

	verbose "Found active LUKS device \"$NAME\" for volume \"$VOLUME\""

	decode_size "$1" 512

	if [ $((NEWSIZE % 512)) -gt 0 ]; then
		error "New size is not sector alligned"
	fi

	if [ $((NEWBLOCKCOUNT - CRYPT_DATA_OFFSET)) -lt 1 ]; then
		error "New size is smaller than minimum ($(((CRYPT_DATA_OFFSET + 1) * 512)) bytes) for LUKS device $VOLUME"
	fi

	L_NEWBLOCKCOUNT=$((NEWBLOCKCOUNT - CRYPT_DATA_OFFSET))
	L_NEWSIZE=$(( L_NEWBLOCKCOUNT * 512))

	VOLUME="$DM_DEV_DIR/mapper/$NAME"
	detect_device_size

	test "$DEVSIZE" -le "$L_NEWSIZE" || SHRINK=1

	if [ $SHRINK -eq 1 ]; then
		# shrink fs on LUKS device first
		resize "$DM_DEV_DIR/mapper/$NAME" "$L_NEWSIZE"b
	fi

	# resize LUKS device
	dry $CRYPTSETUP resize $NAME --size $L_NEWBLOCKCOUNT || error "Failed to resize active LUKS device"

	if [ $SHRINK -eq 0 ]; then
		# grow fs on top of LUKS device
		resize "$DM_DEV_DIR/mapper/$NAME" "$L_NEWSIZE"b
	fi
}

detect_crypt_device() {
	local CRYPT_TYPE
	local L_NEWSIZE
	local TMP

	which $CRYPTSETUP > /dev/null 2>&1 || error "$CRYPTSETUP utility required to resize crypt device"

	CRYPT_TYPE=$($CRYPTSETUP status $1 2> /dev/null | $GREP "type:")

	test -n "$CRYPT_TYPE" || error "$CRYPTSETUP failed to detect device type on $1."

	CRYPT_TYPE=${CRYPT_TYPE##*[[:space:]]}

	case "$CRYPT_TYPE" in
	 LUKS[12]|PLAIN)
		verbose "\"$1\" crypt device is type $CRYPT_TYPE"
		;;
	 *)
		error "Unsupported crypt type \"$CRYPT_TYPE\""
	esac

	TMP=$NEWSIZE
	decode_size "$2" 512
	L_NEWSIZE=$NEWSIZE
	NEWSIZE=$TMP

	if [ $((L_NEWSIZE % 512)) -ne 0 ]; then
		error "New size is not sector alligned"
	fi

	CRYPT_RESIZE_BLOCKS=$NEWBLOCKCOUNT

	if [ "$DEVSIZE" -ge "$L_NEWSIZE" ]; then
		CRYPT_SHRINK=1
	else
		CRYPT_GROW=1
	fi
}

#################################
# Resize active crypt device
#  (on direct user request only)
#################################
resize_crypt() {
	dry $CRYPTSETUP resize "$1" --size $CRYPT_RESIZE_BLOCKS || error "$CRYPTSETUP failed to resize device $1"
}

####################
# Resize filesystem
####################
resize() {
	NEWSIZE=$2
	detect_fs "$1"
	detect_device_size
	verbose "Device \"$VOLUME\" size is $DEVSIZE bytes"
	# if the size parameter is missing use device size
	#if [ -n "$NEWSIZE" -a $NEWSIZE <
	test -z "$NEWSIZE" && NEWSIZE=${DEVSIZE}b
	test -n "$NEWSIZE_ORIG" || NEWSIZE_ORIG=$NEWSIZE
	IFS=$NL
	test -z "$DO_CRYPTRESIZE" || detect_crypt_device "$VOLUME_ORIG" "$NEWSIZE_ORIG"
	test -z "$CRYPT_GROW" || resize_crypt "$VOLUME_ORIG"
	case "$FSTYPE" in
	  "ext3"|"ext2"|"ext4") resize_ext $NEWSIZE ;;
	  "reiserfs") resize_reiser $NEWSIZE ;;
	  "xfs") resize_xfs $NEWSIZE ;;
	  "crypto_LUKS")
		which $CRYPTSETUP > /dev/null 2>&1 || error "$CRYPTSETUP utility required to resize LUKS volume"
		resize_luks $NEWSIZE ;;
	  *) error "Filesystem \"$FSTYPE\" on device \"$VOLUME\" is not supported by this tool." ;;
	esac || error "Resize $FSTYPE failed."
	test -z "$CRYPT_SHRINK" || resize_crypt "$VOLUME_ORIG"
}

####################################
# Calclulate diff between two dates
#  LC_ALL=C input is expected the
#  only one supported
####################################
diff_dates() {
         echo $(( $("$DATE" -u -d"$1" +%s 2>"$NULL") - $("$DATE" -u -d"$2" +%s 2>"$NULL") ))
}

check_luks() {
	detect_luks_device

	check "$DM_DEV_DIR/mapper/$CRYPT_NAME"
}

###################
# Check filesystem
###################
check() {
	detect_fs "$1"
	if detect_mounted ; then
		verbose "Skipping filesystem check for device \"$VOLUME\" as the filesystem is mounted on $MOUNTED";
		cleanup 3
	fi

	case "$FSTYPE" in
	  "ext2"|"ext3"|"ext4")
		IFS_CHECK=$IFS
		IFS=$NL
		for i in $(LC_ALL=C "$TUNE_EXT" -l "$VOLUME"); do
			case "$i" in
			  "Last mount"*) LASTMOUNT=${i##*: } ;;
			  "Last checked"*) LASTCHECKED=${i##*: } ;;
			esac
		done
		case "$LASTMOUNT" in
		  *"n/a") ;; # nothing to do - system was not mounted yet
		  *)
			LASTDIFF=$(diff_dates "$LASTMOUNT" "$LASTCHECKED")
			if test "$LASTDIFF" -gt 0 ; then
				verbose "Filesystem has not been checked after the last mount, using fsck -f"
				FORCE="-f"
			fi
			;;
		esac
		IFS=$IFS_CHECK
	esac

	case "$FSTYPE" in
	  "xfs") if which "$XFS_CHECK" >"$NULL" 2>&1 ; then
			dry "$XFS_CHECK" "$VOLUME"
		 else
			# Replacement for outdated xfs_check
			# FIXME: for small devices we need to force_geometry,
			# since we run in '-n' mode, it shouldn't be problem.
			# Think about better way....
			dry "$XFS_REPAIR" -n -o force_geometry "$VOLUME"
		 fi ;;
	  "ext2"|"ext3"|"ext4"|"reiserfs")
	        # check if executed from interactive shell environment
		case "$-" in
		  *i*) dry "$FSCK" $YES $FORCE "$VOLUME" ;;
		  *) dry "$FSCK" $FORCE -p "$VOLUME" ;;
		esac ;;
	  "crypto_LUKS")
		which $CRYPTSETUP > /dev/null 2>&1 || error "$CRYPTSETUP utility required."
		check_luks ;;
	  *)
		error "Filesystem \"$FSTYPE\" on device \"$VOLUME\" is not supported by this tool." ;;
	esac
}

#############################
# start point of this script
# - parsing parameters
#############################
trap "cleanup 2" 2

# test if we are not invoked recursively
test -n "$FSADM_RUNNING" && exit 0

# test some prerequisities
for i in "$TUNE_EXT" "$RESIZE_EXT" "$TUNE_REISER" "$RESIZE_REISER" \
	"$TUNE_XFS" "$RESIZE_XFS" "$MOUNT" "$UMOUNT" "$MKDIR" \
	"$RMDIR" "$BLOCKDEV" "$BLKID" "$GREP" "$READLINK" \
	"$DATE" "$FSCK" "$XFS_CHECK" "$XFS_REPAIR" "$LVM" ; do
	test -n "$i" || error "Required command definitions in the script are missing!"
done

"$LVM" version >"$NULL" 2>&1 || error "Could not run lvm binary \"$LVM\"."
"$READLINK" -e / >"$NULL" 2>&1 || READLINK_E="-f"
TEST64BIT=$(( 1000 * 1000000000000 ))
test "$TEST64BIT" -eq 1000000000000000 || error "Shell does not handle 64bit arithmetic."
echo Y | "$GREP" Y >"$NULL" || error "Grep does not work properly."
test "$("$DATE" -u -d"Jan 01 00:00:01 1970" +%s)" -eq 1 || error "Date translation does not work."


if [ "$#" -eq 0 ] ; then
	tool_usage
fi

while [ "$#" -ne 0 ]
do
	 case "$1" in
	  "") ;;
	  "-h"|"--help") tool_usage ;;
	  "-v"|"--verbose") VERB="-v" ;;
	  "-n"|"--dry-run") DRY=1 ;;
	  "-f"|"--force") FORCE="-f" ;;
	  "-e"|"--ext-offline") EXTOFF=1 ;;
	  "-y"|"--yes") YES="-y" ;;
	  "-l"|"--lvresize") DO_LVRESIZE=1 ;;
	  "-c"|"--cryptresize") DO_CRYPTRESIZE=1 ;;
	  "check") CHECK=$2 ; shift ;;
	  "resize") RESIZE=$2 ; NEWSIZE=$3 ; shift 2 ;;
	  *) error "Wrong argument \"$1\". (see: $TOOL --help)"
	esac
	shift
done

test "$YES" = "-y" || YES=""
test "$EXTOFF" -eq 1 || EXTOFF=0

if [ -n "$CHECK" ]; then
	check "$CHECK"
elif [ -n "$RESIZE" ]; then
	export FSADM_RUNNING="fsadm"
	resize "$RESIZE" "$NEWSIZE"
	cleanup 0
else
	error "Missing command. (see: $TOOL --help)"
fi