lbu.in 15.3 KB
Newer Older
Natanael Copa's avatar
Natanael Copa committed
1
2
3
#!/bin/sh

# lbu - utility to create local backups.
4
# Copyright (c) 2006-2010 Natanael Copa <ncopa@alpinelinux.org>
Natanael Copa's avatar
Natanael Copa committed
5
6
# May be distributed under GPL2

7
VERSION=@VERSION@
Natanael Copa's avatar
Natanael Copa committed
8
sysconfdir=@sysconfdir@
Natanael Copa's avatar
Natanael Copa committed
9

10
11
if [ ! -f ${libalpine:="./libalpine.sh"} ]; then
	libalpine=/usr/share/lbu/libalpine.sh
12
13
14
	if [ ! -f "$libalpine" ]; then
		libalpine=/lib/libalpine.sh
	fi
15
16
fi
. $libalpine || exit 1
Natanael Copa's avatar
Natanael Copa committed
17

Natanael Copa's avatar
Natanael Copa committed
18
19
EXCLUDE_LIST="$sysconfdir"/exclude
INCLUDE_LIST="$sysconfdir"/include
Natanael Copa's avatar
Natanael Copa committed
20

Natanael Copa's avatar
Natanael Copa committed
21
22
DEFAULT_CIPHER="aes-256-cbc"

Natanael Copa's avatar
Natanael Copa committed
23
LBU_CONF="$sysconfdir"/lbu.conf
24
25
26
LBU_PREPACKAGE="$sysconfdir"/pre-package.d
LBU_POSTPACKAGE="$sysconfdir"/post-package.d

Natanael Copa's avatar
Natanael Copa committed
27
28
if [ -f "$LBU_CONF" ]; then
	. "$LBU_CONF"
29
30
fi

Natanael Copa's avatar
Natanael Copa committed
31
32
UMOUNT_LIST=

Natanael Copa's avatar
Natanael Copa committed
33
34
35
36
37
38
39
40
usage() {
	echo "$PROGRAM $VERSION"
	echo "usage: $PROGRAM <subcommand> [options] [args]

Available subcommands:
  commit (ci)
  exclude (ex, delete)
  include (inc, add)
41
42
  list (ls)
  package (pkg)
Natanael Copa's avatar
Natanael Copa committed
43
  status (stat, st)
44
  list-backup (lb) 
Natanael Copa's avatar
Natanael Copa committed
45
  revert
Natanael Copa's avatar
Natanael Copa committed
46
47
48
49
50
51
52
53
54

Common options:
 -h	Show help for subcommand.
 -q	Quiet mode.
 -v	Verbose mode.
"
	exit 1
}

Natanael Copa's avatar
Natanael Copa committed
55
56
cleanup() {
	local i
57
58
59
	for i in $REMOUNT_RO_LIST; do
		mount -o remount,ro $i
	done
Natanael Copa's avatar
Natanael Copa committed
60
61
62
63
64
65
66
67
68
69
	for i in $UMOUNT_LIST; do
		umount $i
	done
}

exit_clean() {
	cleanup
	exit 1
}

70
71
72
73
74
# check if given dir is not a mounted mountpoint
is_unmounted() {
	awk "\$2 == \"$1\" {exit 1}" /proc/mounts
}

Natanael Copa's avatar
Natanael Copa committed
75
mount_once() {
76
77
78
79
80
81
82
	if is_unmounted "$1"; then
		mount $1 && UMOUNT_LIST="$1 $UMOUNT_LIST" || return 1
	fi
}

# check if given dir is read-only
is_ro() {
83
	local tmpfile=$(mktemp -p "$1" 2>/dev/null)
84
85
86
87
88
89
90
91
92
93
	[ -z "$tmpfile" ] && return 0
	rm -f "$tmpfile"
	return 1
}

mount_once_rw() {
	mount_once "$1" || return 1
	if is_ro "$1"; then
		REMOUNT_RO_LIST="$1 $REMOUNT_RO_LIST"
		mount -o remount,rw "$1"
Natanael Copa's avatar
Natanael Copa committed
94
95
96
	fi
}

Natanael Copa's avatar
Natanael Copa committed
97
98
99
# create backupfile
backup_apkovl() {
	local outfile="$1"
100
	local d=$( date -u -r "$outfile" "+%Y%m%d%H%M%S" )
Natanael Copa's avatar
Natanael Copa committed
101
102
103
104
	local backup=$(echo "$outfile" | sed "s/\.apkovl\.tar\.gz/.$d.tar.gz/")
	vecho "Creating backup $backup"
	if [ -z "$DRYRUN" ]; then
		mv "$outfile" "$backup"
Natanael Copa's avatar
Natanael Copa committed
105
		APKOVL_BACKUP="$backup"
Natanael Copa's avatar
Natanael Copa committed
106
107
108
	fi
}

Natanael Copa's avatar
Natanael Copa committed
109
110
111
112
113
114
115
116
restore_apkovl() {
	local outfile="$1"
	if [ -n "$DRYRUN" ] || [ -z "$APKOVL_BACKUP" ]; then
		return 0
	fi
	mv "$APKOVL_BACKUP" "$outfile"
}

Natanael Copa's avatar
Natanael Copa committed
117
# verify we have openssl if we want to encrypt
118
119
120
check_openssl() {
	[ -z "$ENCRYPTION" ] && return 0
	OPENSSL=$(which openssl 2>/dev/null) || die "openssl was not found"
Natanael Copa's avatar
Natanael Copa committed
121

122
123
124
	$OPENSSL list-cipher-commands | grep "^$ENCRYPTION$" > /dev/null \
		|| die "Cipher $ENCRYPTION is not supported"
}
Natanael Copa's avatar
Natanael Copa committed
125
126
127
128
129
130
131
132
133

# list_add(char *listfile, char* file...)
list_add() {
	local list="$1"
	shift
	mkdir -p `dirname "$list"`
	while [ $# -gt 0 ] ; do
		filename=`echo "$1" | sed 's:^/\+::'`
		if grep "^$filename$" "$list" >/dev/null 2>&1 ; then
134
			vecho "$filename is already in $list."
Natanael Copa's avatar
Natanael Copa committed
135
		else
136
			vecho "Adding $filename to $list."
Natanael Copa's avatar
Natanael Copa committed
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
			echo "$filename" >> "$list"
		fi
		shift
	done
}

# list_delete(char *listfile, char *file...)
list_delete() {
	local list="$1"
	local tmp="$list.old"
	shift
	[ -f "$list" ] || return 1
	while [ $# -gt 0 ] ; do
		filename=`echo "$1" | sed 's:^/\+::'`
		mv "$list" "$tmp"
152
		vecho "Removing $filename from list."
Natanael Copa's avatar
Natanael Copa committed
153
154
155
156
157
158
		grep -v "^$filename$" "$tmp" > "$list"
		rm "$tmp"
		shift
	done
}

159
160
161
162
163
164
165
166
# unpack archive on LBU_MEDIA to given dir
unpack_apkovl() {
	local f="$(hostname).apkovl.tar.gz"
	local dest="$1"
	local mnt="/media/$LBU_MEDIA"
	local count=0
	mkdir -p "$dest"
	mount_once "$mnt"
167
168
169
	if [ -n "$ENCRYPTION" ]; then
		f="$f.$ENCRYPTION"
	fi	
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
	if [ ! -f "$mnt/$f" ]; then
		return 1
	fi
	if [ -z "$ENCRYPTION" ]; then
		tar -C "$dest" -zxf "$mnt/$f"
		return
	fi
	check_openssl
        while [ $count -lt 3 ]; do
		$OPENSSL enc -d -$ENCRYPTION -in "$mnt/$f" | tar \
			-C "$dest" -zx 2>/dev/null && return 0
		count=$(( $count + 1 ))
	done
	cleanup
	die "Failed to unpack $mnt/$f"
}		
186

Natanael Copa's avatar
Natanael Copa committed
187
188
189
190
191
#
# lbu_include - add/remove files to include list
#
usage_include() {
	echo "$PROGRAM $VERSION
Natanael Copa's avatar
Natanael Copa committed
192
Add filename(s) to include list ($sysconfdir/include)
193
194
195

usage: $PROGRAM include|inc|add [-rv] <file> ...
       $PROGRAM include|inc|add [-v] -l
Natanael Copa's avatar
Natanael Copa committed
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210

Options:
  -l	List contents of include list.
  -r	Remove specified file(s) from include list instead of adding.
  -v	Verbose mode.
"
	exit 1
}

cmd_include() {
	if [ "$LIST" ] ; then
		[ $# -gt 0 ] && usage_include
		show_include
		return
	fi
211

Natanael Copa's avatar
Natanael Copa committed
212
213
214
215
216
217
218
219
220
221
222
	[ $# -lt 1 ] && usage_include
	if [ "$REMOVE" ] ; then
		list_delete "$INCLUDE_LIST" "$@"
	else
		list_add "$INCLUDE_LIST" "$@"
		list_delete "$EXCLUDE_LIST" "$@"
	fi
}

show_include() {
	if [ -f "$INCLUDE_LIST" ] ; then
223
		vecho "Include files:"
Natanael Copa's avatar
Natanael Copa committed
224
225
226
227
		cat "$INCLUDE_LIST"
	fi
}

228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
#
# lbu_package - create a package
#
usage_package() {
	echo "$PROGRAM $VERSION
Create backup package.

usage: $PROGRAM package|pkg -v [<dirname>|<filename>]

Options:
  -v	Verbose mode.

If <dirname> is a directory, a package named <hostname>.apkovl.tar.gz will
be created in the specified directory.

If <filename> is specified, and is not a direcotry, a package with the
specified name willbe created.

246
If <dirname> nor <filename> is not specified, a package named
247
248
249
250
251
<hostname>.apkovl.tar.gz will be created in current work directory.
"
	exit 1
}

252
253
254
255
256
257
258
259
260
261
262
_gen_filelist() {
	apk audit --backup -q
	if [ -f var/lib/apk/world ]; then
		echo var/lib/apk/world
	fi
}

_gen_filelist_0() {
	_gen_filelist | tr '\n' '\0'
}

263
264
265
266
cmd_package() {
	local pkg="$1"
	local rc=0
	local owd="$PWD"
267
	local suff="apkovl.tar.gz"
Natanael Copa's avatar
Natanael Copa committed
268
	local tmpdir tmppkg
269
270

	check_openssl
Natanael Copa's avatar
Natanael Copa committed
271
	init_tmpdir tmpdir
272

273
	if [ -d "$LBU_PREPACKAGE" ]; then
274
		run-parts "$LBU_PREPACKAGE" >&2 || return 1
275
276
	fi

277
	[ -n "$ENCRYPTION" ] && suff="$suff.$ENCRYPTION"
278
279
280

	# find filename
	if [ -d "$pkg" ] ; then
281
		pkg="$pkg/$(hostname).$suff"
282
	elif [ -z "$pkg" ]; then
283
		pkg="$PWD/$(hostname).$suff"
284
285
	fi

Natanael Copa's avatar
Natanael Copa committed
286
287
	tmppkg="$tmpdir/$(basename $pkg)"

288
	cd "${ROOT:-/}"
289
	# remove old package.list
290
	if [ -f etc/lbu/packages.list ] && [ -f var/lib/apk/world ]; then
291
292
293
294
		echo "Note: Removing /etc/lbu/packages.list."
		echo "      /var/lib/apk/world will be used."
		rm -f etc/lbu/packages.list
	fi
295
	# create tar archive
Jeff Bilyk's avatar
Jeff Bilyk committed
296
297
	[ -f "$EXCLUDE_LIST" ] && sed -i '/^$/d' "$EXCLUDE_LIST" && excl="-X $EXCLUDE_LIST"
	[ -f "$INCLUDE_LIST" ] && sed -i '/^$/d' "$INCLUDE_LIST" && incl="-T $INCLUDE_LIST"
Natanael Copa's avatar
Natanael Copa committed
298
299
300
301
	if [ -n "$VERBOSE" ]; then
		echo "Archiving the following files:" >&2
		# we dont want to mess the tar output with the
		# password prompt. Lets get the tar output first.
302
		_gen_filelist_0 | xargs -0 tar  $excl $incl -c -v > /dev/null
Natanael Copa's avatar
Natanael Copa committed
303
		rc=$?
Natanael Copa's avatar
Natanael Copa committed
304
305
306
	fi
	if [ $rc -eq 0 ]; then
		if [ -z "$ENCRYPTION" ]; then
307
308
			_gen_filelist_0 | xargs -0 tar $excl $incl -c \
				| gzip -c  >"$tmppkg"
Natanael Copa's avatar
Natanael Copa committed
309
			rc=$?
Natanael Copa's avatar
Natanael Copa committed
310
		else
Natanael Copa's avatar
Natanael Copa committed
311
312
			set -- enc "-$ENCRYPTION" -salt
			[ -n "$PASSWORD" ] && set -- "$@" -pass pass:"$PASSWORD"
313
314
			_gen_filelist_0 | xargs -0 tar $excl $incl -c \
				| gzip -c \
Natanael Copa's avatar
Natanael Copa committed
315
316
				| $OPENSSL "$@" > "$tmppkg"
			rc=$?
317
		fi
318
	fi
Natanael Copa's avatar
Natanael Copa committed
319
	cd "$owd"
Natanael Copa's avatar
Natanael Copa committed
320

Natanael Copa's avatar
Natanael Copa committed
321
	# actually commit unless dryrun mode
Natanael Copa's avatar
Natanael Copa committed
322
	if [ $rc -eq 0 ]; then
323
324
325
		if [ -z "$DRYRUN" ]; then
			if [ "x$pkg" = "x-" ]; then
				cat "$tmppkg"
326
327
			elif [ -b "$pkg" ] || [ -c "$pkg" ]; then
				cat "$tmppkg" > "$pkg"
328
			else
Natanael Copa's avatar
Natanael Copa committed
329
330
331
332
333
334
335
				if cp "$tmppkg" "$pkg.new"; then
					mv "$pkg.new" "$pkg"
					rc=$?
				else
					rm -f "$pkg.new"
					rc=1
				fi
336
337
			fi
		fi
Natanael Copa's avatar
Natanael Copa committed
338
		[ $rc -eq 0 ] && vecho "Created $pkg"
Natanael Copa's avatar
Natanael Copa committed
339
	fi
340
	if [ -d "$LBU_POSTPACKAGE" ]; then
341
		run-parts "$LBU_POSTPACKAGE" >&2
342
	fi
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
	return $rc
}

#
# lbu list - list files that would go to archive
#
usage_list() {
	echo "$PROGRAM $VERSION
Lists files that would go to tar package. Same as: 'lbu package -v /dev/null'

usage: $PROGRAM list|ls
"
	exit 1
}

cmd_list() {
	VERBOSE="-v"
360
	DRYRUN="-n"
361
	ENCRYPTION=
362
363
	cmd_package /dev/null
}
Natanael Copa's avatar
Natanael Copa committed
364
365
366
367
368
369

#
# lbu_commit - commit config files to writeable media
#
usage_commit() {
	echo "$PROGRAM $VERSION
370
371
372
Create a backup of config to writeable media.

usage: $PROGRAM commit|ci [-nv] [<media>]
Natanael Copa's avatar
Natanael Copa committed
373
374

Options:
Natanael Copa's avatar
Natanael Copa committed
375
  -d	Remove old apk overlay files.
376
  -e	Protect configuration with a password.
Natanael Copa's avatar
Natanael Copa committed
377
  -n	Don't commit, just show what would have been commited.
Natanael Copa's avatar
Natanael Copa committed
378
  -p <password>	Give encryption password on the command-line
Natanael Copa's avatar
Natanael Copa committed
379
380
381
382
  -v	Verbose mode.

The following values for <media> is supported: floppy usb
If <media> is not specified, the environment variable LBU_MEDIA will be used.
Natanael Copa's avatar
Natanael Copa committed
383

384
Password protection will use $DEFAULT_CIPHER encryption. Other ciphers can be
Natanael Copa's avatar
Natanael Copa committed
385
386
387
used by setting the DEFAULT_CIPHER or ENCRYPTION environment variables.
For possible ciphers, try: openssl -v

Natanael Copa's avatar
Natanael Copa committed
388
389
The password used to encrypt the file, can either be specified with the -p
option or using the PASSWORD environment variable.
390

Jeremy Thomerson's avatar
Jeremy Thomerson committed
391
The environment variables can also be set in $LBU_CONF
Natanael Copa's avatar
Natanael Copa committed
392
393
394
395
396
"
	exit 1
}

cmd_commit() {
397
	local media mnt statuslist tmplist
398
399
400
401
	local incl excl outfile ovls lines

	check_openssl

Natanael Copa's avatar
Natanael Copa committed
402
403
404
	# turn on verbose mode if dryrun
	[ -n "$DRYRUN" ] && VERBOSE="-v"

405
	# find what media to use
Natanael Copa's avatar
Natanael Copa committed
406
	media="${1:-$LBU_MEDIA}"
Natanael Copa's avatar
Natanael Copa committed
407
408
	[ -z "$media" ] && usage_commit

409
	# mount media unles its already mounted
Natanael Copa's avatar
Natanael Copa committed
410
	mnt=/media/$media
Natanael Copa's avatar
Natanael Copa committed
411
	[ -d "$mnt" ] || usage
412
	mount_once_rw "$mnt" || die "failed to mount $mnt"
Natanael Copa's avatar
Natanael Copa committed
413

Natanael Copa's avatar
Natanael Copa committed
414
415
416
417
418
419
420
	# find the outfile
	outfile="$mnt/$(hostname).apkovl.tar.gz"
	if [ -n "$ENCRYPTION" ]; then
		outfile="$outfile.$ENCRYPTION"
	fi

	# remove old config files
421
	if [ -n "$DELETEOLDCONFIGS" ] ; then
Natanael Copa's avatar
Natanael Copa committed
422
423
424
425
		local rmfiles=$(ls "$mnt/"*.apkovl.tar.gz* 2>/dev/null)
		if [ -n "$rmfiles" ] ; then
			if [ -n "$VERBOSE" ]; then
				echo "Removing old apk overlay files:" >&2
426
				echo "$rmfiles"
Natanael Copa's avatar
Natanael Copa committed
427
				echo "" >&2
428
			fi
Natanael Copa's avatar
Natanael Copa committed
429
			[ -z "$DRYRUN" ] && rm "$mnt/"*.apkovl.tar.gz*
430
431
		fi
	else
Natanael Copa's avatar
Natanael Copa committed
432
       		lines=$(ls -1 "$mnt"/*.apkovl.tar.gz* 2>/dev/null)
Natanael Copa's avatar
Natanael Copa committed
433
		if [ "$lines" = "$outfile" ]; then
Natanael Copa's avatar
Natanael Copa committed
434
			backup_apkovl "$outfile"
Natanael Copa's avatar
Natanael Copa committed
435
		elif [ -n "$lines" ]; then
436
	               	# More then one apkovl, this is a security concern
Natanael Copa's avatar
Natanael Copa committed
437
			cleanup
Natanael Copa's avatar
Natanael Copa committed
438
439
440
441
			eecho "The following apkovl file(s) were found:"
			eecho "$lines"
			eecho ""
	               	die "Please use -d to replace."
442
		fi
Natanael Copa's avatar
Natanael Copa committed
443
	fi
444
445
446

	# create package
	if ! cmd_package "$outfile"; then
Natanael Copa's avatar
Natanael Copa committed
447
		restore_apkovl "$outfile"
Natanael Copa's avatar
Natanael Copa committed
448
		cleanup
Natanael Copa's avatar
Natanael Copa committed
449
		die "Problems creating archive. aborting"
450
	fi
Natanael Copa's avatar
Natanael Copa committed
451

452
453
	# delete old backups if needed
	# poor mans 'head -n -N' done with awk.
454
	ls "$mnt"/$(hostname).[0-9][0-9][0-9][0-9]*[0-9].tar.gz 2>/dev/null \
455
456
457
458
459
460
461
		| awk '{ a[++i] = $0; } END { 
			print a[0]; 
			while (i-- > '"${BACKUP_LIMIT:-0}"') { 
				print a[++j] 
			}
		}' | xargs rm 2>/dev/null

Natanael Copa's avatar
Natanael Copa committed
462
	# remove obsolete file. some older version of alpine needs this
463
	# to be able to upgrade
464
465
	if [ -z "$DRYRUN" ] && [ -f $mnt/packages.list ]; then
		echo "Note: Removing packages.list from $(basename $mnt)."
466
		echo "      /var/lib/apk/world will be used."
467
468
		rm -f $mnt/packages.list
	fi
Natanael Copa's avatar
Natanael Copa committed
469

Natanael Copa's avatar
Natanael Copa committed
470
	# make sure data is written
Natanael Copa's avatar
Natanael Copa committed
471
	sync
Natanael Copa's avatar
Natanael Copa committed
472
	[ "$media" = "floppy" ] && sleep 1
Natanael Copa's avatar
Natanael Copa committed
473
474

	# move current to commited.
475
	vecho "Successfully saved apk overlay files"
Natanael Copa's avatar
Natanael Copa committed
476
477
478
479
480
481
482
}

#---------------------------------------------------------------------------
# lbu_exclude - add remove file(s) from exclude list

usage_exclude() {
	echo "$PROGRAM $VERSION
Natanael Copa's avatar
Natanael Copa committed
483
Add filename(s) to exclude list ($sysconfdir/exclude)
484
485
486

usage: $PROGRAM exclude|ex|delete [-rv] <file> ...
       $PROGRAM exclude|ex|delete [-v] -l
Natanael Copa's avatar
Natanael Copa committed
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501

Options:
  -l	List contents of exclude list.
  -r	Remove specified file(s) from exclude list instead of adding.
  -v	Verbose mode.
"
	exit 1
}

cmd_exclude() {
	if [ "$LIST" ] ; then
		[ $# -gt 0 ] && usage_exclude
		show_exclude
		return
	fi
502

Natanael Copa's avatar
Natanael Copa committed
503
504
505
506
507
508
509
510
511
512
513
	[ $# -lt 1 ] && usage_exclude
	if [ "$REMOVE" ] ; then
		list_delete "$EXCLUDE_LIST" "$@"
	else
		list_delete "$INCLUDE_LIST" "$@"
		list_add "$EXCLUDE_LIST" "$@"
	fi
}

show_exclude() {
	if [ -f "$EXCLUDE_LIST" ] ; then
514
		vecho "Exclude files:"
Natanael Copa's avatar
Natanael Copa committed
515
		cat "$EXCLUDE_LIST"
516
	fi
Natanael Copa's avatar
Natanael Copa committed
517
518
}

Natanael Copa's avatar
Natanael Copa committed
519
#---------------------------------------------------------------------------
520
# lbu_listbackup - Show old commits
521
usage_listbackup() {
Natanael Copa's avatar
Natanael Copa committed
522
523
524
525
	cat <<EOF
$PROGRAM $VERSION
Show old commits.

526
usage: $PROGRAM list-backup [<media>]
Natanael Copa's avatar
Natanael Copa committed
527
528
529
530
531

EOF
	exit 1
}

532
cmd_listbackup() {
Natanael Copa's avatar
Natanael Copa committed
533
534
	local media=${1:-"$LBU_MEDIA"}
	local mnt="/media/$media"
Natanael Copa's avatar
Natanael Copa committed
535
	[ -z "$media" ] && usage_listbackup
Natanael Copa's avatar
Natanael Copa committed
536
537
538
539
540
541
542
543

	mount_once "$mnt" || die "failed to mount $mnt"
	ls -1 "$mnt"/*.[0-9][0-9]*[0-9][0-9].tar.gz* 2>/dev/null | sed 's:.*/::'
}

#---------------------------------------------------------------------------
# lbu_revert - revert to old config
usage_revert() {
Natanael Copa's avatar
Natanael Copa committed
544
545
546
547
548
549
	cat <<EOF
$PROGRAM $VERSION
Revert to older commit.

usage: $PROGRAM revert <REVISION> [<media>]

Natanael Copa's avatar
Natanael Copa committed
550
The revision should be one of the files listed by 'lbu list-backup'.
Natanael Copa's avatar
Natanael Copa committed
551

Natanael Copa's avatar
Natanael Copa committed
552
EOF
Natanael Copa's avatar
Natanael Copa committed
553
554
555
556
}

cmd_revert() {
	local media=${2:-"$LBU_MEDIA"}
Natanael Copa's avatar
Natanael Copa committed
557
558
559
560
561
562
	[ -z "$media" ] && usage_revert
	local mnt="/media/$media"
	local revertto="$mnt/$1"
	local current="$mnt/$(hostname).apkovl.tar.gz"

	if [ -n "$ENCRYPTION" ]; then
563
		current="$current.$ENCRYPTION"
Natanael Copa's avatar
Natanael Copa committed
564
	fi
565
	mount_once_rw "$mnt" || die "failed to mount $mnt"
Natanael Copa's avatar
Natanael Copa committed
566
	[ -f "$revertto" ] || die "file not found: $revertto"
567
	backup_apkovl "$current"
Natanael Copa's avatar
Natanael Copa committed
568
	vecho "Reverting to $1"
569
	[ -z "$DRYRUN" ] && mv "$revertto" "$current"
Natanael Copa's avatar
Natanael Copa committed
570
571
}

Natanael Copa's avatar
Natanael Copa committed
572
573
574
575
576
577
#---------------------------------------------------------------------------
# lbu_status - check what files have been changed since last save
usage_status() {
	echo "$PROGRAM $VERSION
Check what files have been changed since last commit.

578
usage: $PROGRAM status|st [-av]
Natanael Copa's avatar
Natanael Copa committed
579
580
581
582
583
584
585
586

Options:
  -a	Compare all files, not just since last commit.
  -v	Also show include and exclude lists.
"
	exit 1
}

587
588
589
590
591
cmd_status() {
	if [ -n "$USE_DEFAULT" ]; then
		apk audit --backup
		return 0
	fi
592
593
594
595
	LBU_MEDIA=${1:-"$LBU_MEDIA"}
	[ -z "$LBU_MEDIA" ] && usage_status
	local tmp
	init_tmpdir tmp
596
	mkdir -p "$tmp/a" "$tmp/b"
597
598
599
600

	# unpack last commited apkovl to tmpdir/a
	unpack_apkovl "$tmp/a"

601
	# generate new apkovl and extract to tmpdir/b
602
603
	local save_encryption="$ENCRYPTION"
	ENCRYPTION=
604
	cmd_package - | tar -C "$tmp/b" -zx
605
	ENCRYPTION="$save_encryption"
606

607
	# show files that exists in a but not in b as deleted
608
609
610
	local f
	( cd "$tmp"/a && find ) | while read f; do
		f=${f#./}
611
612
613
614
615
		local b="$tmp/b/$f"
		if [ "$f" = "." ] || [ -e "$b" ] || [ -L "$b" ]; then
			continue
		fi
		echo "D $f"
616
617
	done
	
618
	# compare files in b with files in a
619
620
621
622
623
	( cd "$tmp"/b && find ) | while read f; do
		f=${f#./}
		[ "$f" = "." ] && continue
		local a="$tmp/a/$f"
		local b="$tmp/b/$f"
624
		if [ ! -e "$a" ] && [ ! -L "$a" ]; then
625
			echo "A $f"
Natanael Copa's avatar
Natanael Copa committed
626
627
		elif [ -f "$a" ] && [ -f "$b" ] && [ "$b" -nt "$a" ] \
		     && ! cmp -s "$a" "$b"; then
628
629
630
			echo "U $f"
		fi
	done
631
632
}

Natanael Copa's avatar
Natanael Copa committed
633

634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
#-----------------------------------------------------------
# lbu_diff - run a diff against last commit
usage_diff() {
	echo "$PROGRAM $VERSION
Run a diff against last commit

usage: $PROGRAM diff [<media>]
"
	exit 1
}

cmd_diff() {
	LBU_MEDIA=${1:-"$LBU_MEDIA"}
	[ -z "$LBU_MEDIA" ] && usage_diff
	local tmp
	init_tmpdir tmp
	mkdir -p "$tmpdir/a" "$tmp/b"
	unpack_apkovl "$tmp/a"
652
	ENCRYPTION=
653
654
655
656
657
	cmd_package - | tar -C "$tmp/b" -zx
	cd "$tmp" && diff -ruN a b 
}
	

Natanael Copa's avatar
Natanael Copa committed
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674

#-----------------------------------------------------------
# Main

cmd=`echo "$PROGRAM" | cut -s -d_ -f2`
PROGRAM=`echo "$PROGRAM" | cut -d_ -f1`
if [ -z "$cmd" ] ; then
	cmd="$1"
	[ -z "$cmd" ] && usage
	shift
fi

# check for valid sub command
case "$cmd" in
	include|inc|add)	SUBCMD="include";;
	commit|ci)		SUBCMD="commit";;
	exclude|ex|delete)	SUBCMD="exclude";;
675
676
	list|ls)		SUBCMD="list";;
	package|pkg)		SUBCMD="package";;
Natanael Copa's avatar
Natanael Copa committed
677
	status|stat|st)		SUBCMD="status";;
678
	list-backup|lb)		SUBCMD="listbackup";;
Natanael Copa's avatar
Natanael Copa committed
679
	revert)			SUBCMD="revert";;
680
	diff)			SUBCMD="diff";;
Natanael Copa's avatar
Natanael Copa committed
681
682
683
684
	*)			usage;;
esac

# parse common args
685
while getopts "adehlM:np:qrv" opt ; do
Natanael Copa's avatar
Natanael Copa committed
686
687
688
689
	case "$opt" in
		a) 	[ $SUBCMD = status ] || usage_$SUBCMD
			USE_DEFAULT="-a"
			;;
690
691
		d)	DELETEOLDCONFIGS="yes"
			;;
692
		e)	[ -z "$ENCRYPTION" ] && ENCRYPTION="$DEFAULT_CIPHER"
693
			;;
Natanael Copa's avatar
Natanael Copa committed
694
695
696
697
698
699
700
		h) 	usage_$SUBCMD
			;;
		l)	LIST="-l"
			;;
		n) 	[ $SUBCMD = commit ] || usage_$SUBCMD
			DRYRUN="-n"
			;;
701
702
		p)	PASSWORD="$OPTARG"
			;;
Natanael Copa's avatar
Natanael Copa committed
703
704
705
706
707
708
709
710
711
		q)	QUIET="$QUIET -q"
			;;
		r)	REMOVE="-r"
			;;
		v) 	VERBOSE="$VERBOSE -v"
			;;
	esac
done
shift `expr $OPTIND - 1`
712

Natanael Copa's avatar
Natanael Copa committed
713
trap exit_clean SIGINT SIGTERM
714
cmd_$SUBCMD "$@"
Natanael Copa's avatar
Natanael Copa committed
715
716
717
retcode=$?

cleanup
Natanael Copa's avatar
Natanael Copa committed
718
exit $retcode