bin/backup-script

   1 #!/bin/bash
   2 #
   3 # backup-script system for cloning systems using rsync
   4 # Copyright (c)2008-2016 Alexander Barton <alex@barton.de>
   5 #
   6 # This program is free software; you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation; either version 2 of the License, or
   9 # (at your option) any later version.
  10 # Please read the file COPYING, README and AUTHORS for more information.
  11 #
  12
  13 NAME=$(basename "$0")
  14 PIDFILE="/var/run/$NAME.pid"
  15
  16 DRYRUN=0
  17 VERBOSE=0
  18 TAG=""
  19
  20 export LC_ALL=C
  21
  22 declare -i count_all=0
  23 declare -i count_started=0
  24 declare -i count_ok=0
  25 declare -i count_ok_vanished=0
  26
  27 destinations=""
  28
  29 # Default settings, can be overwritten in backup-script.conf:
  30 [ -d "/usr/local/etc/backup-script.d" ] \
  31         && conf_d="/usr/local/etc/backup-script.d" \
  32         || conf_d="/etc/backup-script.d"
  33 pre_exec=""
  34 post_exec=""
  35 default_backup_type="rsync"
  36 default_source_root="/"
  37 default_files="running-config"
  38 default_target="/var/backups"
  39 default_user="root"
  40 default_ssh_args_add=""
  41 default_rsync_args_add=""
  42 default_exclude_args_add=""
  43 default_exclude_dirs_add=""
  44 default_compress=1
  45 default_ping=1
  46 default_local=0
  47 default_generations=0
  48 default_job_pre_exec=""
  49 default_job_post_exec=""
  50 default_tags=""
  51
  52 Usage() {
  53         echo "Usage: $NAME [<options>] [<system> [<system> [...]]]"
  54         echo
  55         echo "  -n, --dry-run       Test run only, don't copy any data."
  56         echo "  -p, --progress      Show progress, see rsync(1)."
  57         echo "  -t TAG, --tag TAG   Only run jobs with tag TAG."
  58         echo
  59         echo "When no <system> is given, all defined systems are used."
  60         echo
  61         echo -e $config_info
  62         echo
  63         exit 2
  64 }
  65
  66 CleanUp() {
  67         if [ -n "$post_exec" ]; then
  68                 echo "Executing \"$post_exec\" ..."
  69                 sh -c $post_exec
  70                 if [ $? -ne 0 ]; then
  71                         echo "Warning: post-exec command failed!"
  72                 fi
  73                 echo
  74         fi
  75         rm -f "$PIDFILE"
  76 }
  77
  78 GotSignal() {
  79         echo
  80         echo "--> Got break signal, cleaning up & aborting ..."
  81         echo
  82         CleanUp
  83         echo -n "Aborted: "; date
  84         echo
  85         sleep 3
  86         exit 9
  87 }
  88
  89 ExecJob() {
  90         local what="$1"
  91         local cmd="$2"
  92
  93         echo "Running job ${what}-exec command ..."
  94         [ "$local" -eq 0 ] \
  95                 && cmd="$ssh_cmd ${user}@${system} $cmd"
  96         echo -n "Start date (${what}-exec): "; date
  97         echo "$cmd"
  98         if [ "$DRYRUN" -eq 0 ]; then
  99                 $SHELL -c "$cmd"; local ret=$?
 100         else
 101                 echo " *** Trial run, not executing ${what}-exec command!"
 102                 ret=0
 103         fi
 104         [ $ret -eq 0 ] \
 105                 && echo "The ${what}-exec command completed with status 0, OK." \
 106                 || echo "The ${what}-exec command completed with ERRORS, code $ret!"
 107         return $ret
 108 }
 109
 110 GetFS() {
 111         local dir="$1"
 112
 113         while [ -n "$dir" ]; do
 114                 findmnt -fn -o FSTYPE --raw "$dir" 2>/dev/null; local r=$?
 115                 if [ $r -eq 0 ]; then
 116                         return 0
 117                 elif [ $r -eq 127 ]; then
 118                         echo "UNKNOWN"
 119                         return 1
 120                 fi
 121                 dir=$(dirname "$dir") || return 1
 122         done
 123 }
 124
 125 CreateSubvolume() {
 126         local volume="$1"
 127         local fs
 128         local dir
 129
 130         dir=$(dirname "$volume")
 131         fs=$(GetFS "$dir")
 132         case "$fs" in
 133           "btrfs")
 134                 btrfs subvolume create "$volume"  >/dev/null || return 1
 135                 ;;
 136           "zfs")
 137                 zfs create "$(echo "$volume" | cut -c2-)" || return 1
 138                 ;;
 139           *)
 140                 echo "CreateSubvolume: Incompatible FS type \"$fs\" on \"$dir\"!"
 141                 return 9
 142         esac
 143         return 0
 144 }
 145
 146 CloneSubvolume() {
 147         local source="$1"
 148         local volume="$2"
 149         local snapshot="$3"
 150         local dir
 151         local fs
 152         local link_name
 153
 154         dir=$(dirname "source")
 155         fs=$(GetFS "$source")
 156         case "$fs" in
 157           "btrfs")
 158                 btrfs subvolume snapshot "$source" "$snapshot"  >/dev/null || return 1
 159                 ;;
 160           "zfs")
 161                 zfs snapshot "$snapshot" || return 1
 162                 link_name="$(echo "$snapshot" | cut -d@ -f2-)"
 163                 ln -s \
 164                         "current/.zfs/snapshot/$link_name" \
 165                         "$(dirname "$volume")/$link_name"
 166                 ;;
 167           *)
 168                 echo "CloneSubvolume: Incompatible FS type \"$fs\" on \"$source\"!"
 169                 return 9
 170         esac
 171         return 0
 172 }
 173
 174 RenameSubvolume() {
 175         local source="$1"
 176         local target="$2"
 177         local fs
 178
 179         fs=$(GetFS "$source")
 180         case "$fs" in
 181           "btrfs")
 182                 mv "$source" "$target" || return 1
 183                 ;;
 184           "zfs")
 185                 zfs rename \
 186                   "$(echo "$source" | cut -c2-)" \
 187                   "$(echo "$target" | cut -c2-)" \
 188                         || return 1
 189                 ;;
 190           *)
 191                 echo "RenameSubvolume: Incompatible FS type \"$fs\" on \"$source\"!"
 192                 return 9
 193         esac
 194         return 0
 195 }
 196
 197 DeleteSubvolume() {
 198         local volume="$1"
 199         local fs
 200         local id
 201         local snapshot
 202
 203         fs=$(GetFS "$volume")
 204         case "$fs" in
 205           "btrfs")
 206                 btrfs subvolume delete "$volume" >/dev/null || return 1
 207                 ;;
 208           "zfs")
 209                 id="$(basename "$volume")"
 210                 if [ -h "$volume" ]; then
 211                         snapshot="$(dirname "$volume")/current@$id"
 212                 else
 213                         snapshot="$volume"
 214                 fi
 215                 zfs destroy -r "$(echo "$snapshot" | cut -c2-)" >/dev/null || return 1
 216                 [ -h "$volume" ] && rm "$volume"
 217                 ;;
 218           *)
 219                 echo "DeleteSubvolume: Incompatible FS type \"$fs\" on \"$volume\"!"
 220                 return 9
 221         esac
 222         return 0
 223 }
 224
 225 Initialize_Last_SysTarget_Snapshot() {
 226         sys_target="$1"
 227         unset last
 228         unset snapshot
 229
 230         fs=$(GetFS "$sys_target")
 231         case "$fs" in
 232           "btrfs")
 233                 # Search directory of last generation, if any
 234                 last=$(ls -1d "$sys_target"/[0-9]* 2>/dev/null | sort -r | head -n1)
 235                 if [ -n "$last" ]; then
 236                         if [ ! -d "$last" ]; then
 237                                 echo "Last snapshot \"$last\" seems not to be a directory!? \"$system\" skipped!"
 238                                 echo
 239                                 return 1
 240                         fi
 241                 fi
 242                 sys_target="$sys_target/$(date +%Y%m%d-%H%M%S)"
 243                 snapshot="$sys_target"
 244                 ;;
 245           "zfs")
 246                 # On ZFS, the last generation is always named "current"
 247                 if [ -e "$sys_target/current" ]; then
 248                         last="$sys_target/current"
 249                         if [ "$(uname)" = "Linux" ]; then
 250                                 date=$(LC_ALL=C stat "$1" | grep "^Modify: " \
 251                                  | cut -d':' -f2- | cut -d. -f1)
 252                         else
 253                                 date=$(LC_ALL=C stat -f "%Sc" "$1")
 254                         fi
 255                         date=$(echo "$date" | sed -e's/^ //g' -e 's/[-:]//g' -e 's/ /-/g')
 256
 257                 else
 258                         last=""
 259                         date="$(date +%Y%m%d-%H%M%S)"
 260                 fi
 261                 snapshot="$(echo "$sys_target/current" | cut -c2-)@$date"
 262                 sys_target="$sys_target/current"
 263                 ;;
 264           *)
 265                 echo "Initialize_Last_SysTarget_Snapshot: Incompatible FS type \"$fs\" on \"$sys_target\"!"
 266                 return 1
 267         esac
 268         return 0
 269 }
 270
 271 # Search configuration file (last one is used as default!)
 272 for conf in \
 273         "/usr/local/etc/backup-script.conf" \
 274         "/etc/backup-script.conf" \
 275         "${conf_d}/backup-script.conf" \
 276         "/usr/local/etc/backup-script.conf" \
 277 ; do
 278         [ -r "$conf" ] && break
 279 done
 280
 281 # Read in configuration file
 282 config_info="Configuration file is \"$conf\""
 283 if [ -r "$conf" ]; then
 284         # shellcheck source=/dev/null
 285         source "$conf"
 286 else
 287         config_info="${config_info} (not readable, using defaults)"
 288 fi
 289 config_info="${config_info},\nusing \"$conf_d\" as configuration directory."
 290
 291 while [ $# -gt 0 ]; do
 292         case "$1" in
 293           "-n"|"--dry-run")
 294                 DRYRUN=1; shift
 295                 ;;
 296           "-p"|"--progress")
 297                 VERBOSE=1; shift
 298                 ;;
 299           "-t"|"--tag")
 300                 shift; TAG="$1"; shift
 301                 [ -n "$TAG" ] || Usage
 302                 ;;
 303           "-"*)
 304                 Usage
 305                 ;;
 306           *)
 307                 break
 308         esac
 309 done
 310
 311 echo -n "Started: "; date
 312 echo -e "$config_info"
 313
 314 # Check rsync and its protocol version
 315 rsync=$(which "rsync" 2>/dev/null)
 316 if [ $? -ne 0 ]; then
 317         echo "Failed to detect rsync(1)! Is it installed in your \$PATH?"
 318         exit 1
 319 fi
 320 rsync_proto=$($rsync --version 2>/dev/null | head -n 1 | sed 's/.*  protocol version \([0-9]*\)$/\1/')
 321 if [ $? -ne 0 ]; then
 322         echo "Failed to detect protocol version of $rsync!"
 323         exit 1
 324 fi
 325 echo "Rsync command is $rsync, protocol version $rsync_proto."
 326
 327 [[ -n "$TAG" ]] && echo "Running jobs tagged with \"$TAG\"."
 328 echo
 329
 330 trap GotSignal SIGINT
 331
 332 if [ $# -ge 1 ]; then
 333         for s in "$@"; do
 334                 if [ ! -r "${conf_d}/$s" ]; then
 335                         echo "$NAME: Can' read \"${conf_d}/$s\"!"
 336                         exit 3
 337                 fi
 338                 sys+=("${conf_d}/$s")
 339         done
 340 else
 341         sys=("${conf_d}/"*)
 342 fi
 343
 344 # check and create PID file
 345 if [ -e "$PIDFILE" ]; then
 346         echo "Lockfile \"$PIDFILE\" already exists."
 347         echo "Is an other instance still running?"
 348         echo
 349         echo -n "Aborted: "; date
 350         echo
 351         exit 4
 352 fi
 353 touch "$PIDFILE" 2>/dev/null
 354 if [ $? -ne 0 ]; then
 355         echo "Warning: can't create PID file \"$PIDFILE\"!"
 356         echo
 357 else
 358         echo "$$" >>"$PIDFILE"
 359 fi
 360
 361 if [ -n "$pre_exec" ]; then
 362         echo "Executing \"$pre_exec\" ..."
 363         sh -c $pre_exec
 364         if [ $? -ne 0 ]; then
 365                 echo "Error: pre-exec command failed!"; echo
 366                 CleanUp
 367                 echo "Aborting backup."; echo
 368                 exit 5
 369         fi
 370         sleep 2
 371         echo
 372 fi
 373
 374 for f in "${sys[@]}"; do
 375         [[ -r "$f" && -f "$f" ]] || continue
 376
 377         fname=$(basename "$f")
 378         case "$fname" in
 379                 "backup-script.conf"|*.sh)
 380                         continue
 381                         ;;
 382         esac
 383
 384         # Set global defaults
 385         system="$fname"
 386         backup_type="$default_backup_type"
 387         user="$default_user"
 388         source_root="$default_source_root"
 389         files="$default_files"
 390         target="$default_target"
 391         ssh_args_add="$default_ssh_args_add"
 392         rsync_args_add="$default_rsync_args_add"
 393         exclude_args_add="$default_exclude_args_add"
 394         exclude_dirs_add="$default_exclude_dirs_add"
 395         compress="$default_compress"
 396         ping="$default_ping"
 397         local="$default_local"
 398         generations="$default_generations"
 399         job_pre_exec="$default_job_pre_exec"
 400         job_post_exec="$default_job_post_exec"
 401         tags="$default_tags"
 402
 403         # Compatibility with backup-pull(1) script: Save global values ...
 404         pre_exec_saved="$pre_exec"
 405         post_exec_saved="$post_exec"
 406
 407         # Compatibility with backup-pull(1) script: Set defaults
 408         host=""
 409         unset source
 410         unset pre_exec
 411         unset post_exec
 412
 413         # Read in system configuration file
 414         # shellcheck source=/dev/null
 415         source "$f"
 416
 417         # Compatibility with backup-pull(1) script: Fix up configuration
 418         [[ "$system" = "$fname" && -n "$host" ]] \
 419                 && system="$host"
 420         [[ "$source_root" = "$default_source_root" && -n "$source" ]] \
 421                 && source_root="$source"
 422         [[ -z "$job_pre_exec" && -n "$pre_exec" ]] \
 423                 && job_pre_exec="$pre_exec"
 424         [[ -z "$job_post_exec" && -n "$post_exec" ]] \
 425                 && job_post_exec="$post_exec"
 426
 427         # Compatibility with backup-pull(1) script: Restore global values ...
 428         pre_exec="$pre_exec_saved"
 429         post_exec="$post_exec_saved"
 430
 431         # Validate configuration
 432         if [[ "$system" = "localhost" || "$system" = "127.0.0.1" ]]; then
 433                 # Local system
 434                 local=1
 435                 compress=0
 436         fi
 437
 438         # Add "NONE" tag when no tags are given in the config file:
 439         [[ -z "$tags" ]] && tags="NONE"
 440         # Add "auto-tags":
 441         [[ "$local" -eq 1 ]] && tags="$tags,LOCAL"
 442         # Check tags
 443         if [[ -n "$TAG" && "$TAG" != "ALL" ]]; then
 444                 echo "$tags" | grep -E "(^|,)$TAG(,|$)" >/dev/null 2>&1
 445                 if [ $? -ne 0 ]; then
 446                         if [ "$DRYRUN" -ne 0 ]; then
 447                                 echo "Tags of system \"$system\" don't match \"$TAG\": \"$tags\". Skipped."
 448                                 echo
 449                         fi
 450                         continue
 451                 fi
 452         fi
 453
 454         # Make sure "source_root" ends with a slash ("/")
 455         case "$source_root" in
 456           *"/")
 457                 ;;
 458           *)
 459                 source_root="$source_root/"
 460         esac
 461
 462         # Make sure "target" DOESN'T end with a slash ("/")
 463         case "$target" in
 464           "*/")
 465                 target=$( echo "$target" | sed -e 's/\/$//g' )
 466                 ;;
 467         esac
 468
 469         [ "$system" = "$fname" ] \
 470                 && systxt="\"$system\"" \
 471                 || systxt="\"$fname\" [\"$system\"]"
 472         [ "$local" -eq 0 ] \
 473                 && echo "Working on $systxt ..." \
 474                 || echo "Working on $systxt (local system) ..."
 475
 476         count_all=$count_all+1
 477
 478         # Check target directory
 479         if [ -z "$target" ]; then
 480                 echo "No target directory specified for \"$system\"!? Skipped!"
 481                 echo; continue
 482         fi
 483         if [ ! -d "$target" ]; then
 484                 echo "Target \"$target\" is not a directory!? \"$system\" skipped!"
 485                 echo; continue
 486         fi
 487
 488         sys_target="$target/$fname"
 489         sys_root="$sys_target"
 490         if [[ "$DRYRUN" -eq 0 && ! -e "$sys_target" ]]; then
 491                 if [ $generations -gt 0 ]; then
 492                         CreateSubvolume "$sys_target"
 493                 else
 494                         mkdir -p "$sys_target"
 495                 fi
 496                 if [ $? -ne 0 ]; then
 497                         echo "Can't create \"$sys_target\"!? \"$system\" skipped!"
 498                         echo; continue
 499                 fi
 500         fi
 501
 502         if [[ "$local" -eq 0 && "$ping" -ne 0 ]]; then
 503                 # Check if system is alive
 504                 ping -c 1 "$system" >/dev/null 2>&1
 505                 if [ $? -ne 0 ]; then
 506                         echo "Host \"$system\" seems not to be alive!? Skipped."
 507                         echo; continue
 508                 fi
 509                 echo "OK, host \"$system\" seems to be alive."
 510         fi
 511
 512         if [ $generations -gt 0 ]; then
 513                 # Make sure no old backup is stored in system directory
 514                 if [ -e "$sys_target/.stamp" ]; then
 515                         # There seems to be a genearation-less backup in the
 516                         # target directory!
 517                         echo "Target directory \"$sys_target\" seems to be unclean!? \"$system\" skipped!"
 518                         echo; continue
 519                 fi
 520
 521                 Initialize_Last_SysTarget_Snapshot "$sys_target" || continue
 522
 523                 if [[ -n "$last" && ! -e "$last/.stamp" ]]; then
 524                         # Old backup directory without "stamp file", continue
 525                         echo "Found incomplete snapshot in \"$last\", reusing and renaming it ..."
 526                         RenameSubvolume "$last" "$sys_target"
 527                         if [ $? -ne 0 ]; then
 528                                 echo "Failed to rename last snapshot \"$last\" to \"$sys_target\"!? \"$system\" skipped!"
 529                                 echo; continue
 530                         fi
 531                 elif [ -n "$last" ]; then
 532                         # Old backup directory found, create new snapshot
 533                         echo "Found last snapshot in \"$last\"."
 534                         if [ "$DRYRUN" -eq 0 ]; then
 535                                 CloneSubvolume "$last" "$sys_target" "$snapshot"; r=$?
 536                                 if [ $r -ne 0 ]; then
 537                                         echo "Can't create snapshot \"$snapshot\" of \"$last\", code $r!? \"$system\" skipped!"
 538                                         echo; continue
 539                                 fi
 540                                 echo "Created new snapshot in \"$snapshot\"."
 541                         else
 542                                 echo " *** Trial run, not creating new snapshot in \"$snapshot\"!"
 543                         fi
 544                 else
 545                         # No old backup found, create new subvolume
 546                         if [ "$DRYRUN" -eq 0 ]; then
 547                                 CreateSubvolume "$sys_target"; r=$?
 548                                 if [ $r -ne 0 ]; then
 549                                         echo "Can't create subvolume \"$sys_target\", code $r!? \"$system\" skipped!"
 550                                         echo; continue
 551                                 fi
 552                                 echo "Created new subvolume in \"$sys_target\"."
 553                         else
 554                                 echo " *** Trial run, not creating new subvolume \"$sys_target\"!"
 555                         fi
 556                 fi
 557         fi
 558
 559         ssh_cmd="ssh"
 560         [ -n "$ssh_args_add" ] && ssh_cmd="$ssh_cmd $ssh_args_add"
 561
 562         # execute job "pre-exec" command, if any
 563         if [ -n "$job_pre_exec" ]; then
 564                 ExecJob pre "$job_pre_exec" ; ret=$?
 565                 if [ $ret -ne 0 ]; then
 566                         [ $ret -ne 99 ] && count_started=$count_started+1
 567                         echo "Pre-exec command failed, \"$system\" skipped!"
 568                         echo; continue
 569                 fi
 570         fi
 571
 572         # prepare (remote) command ...
 573         if [[ "$backup_type" == "rsync" ]]; then
 574                 cmd="$rsync --archive --timeout=900"
 575                 [ "$compress" -ne 0 ] && cmd="$cmd --compress"
 576                 [ "$local" -eq 0 ] && cmd="$cmd --rsh=\"$ssh_cmd\""
 577                 cmd="$cmd --delete-during --delete-excluded --sparse"
 578                 if [ "$VERBOSE" -gt 0 ]; then
 579                         [ "$rsync_proto" -ge 31 ] \
 580                                 && cmd="$cmd --info=progress2" \
 581                                 || cmd="$cmd --progress"
 582                 fi
 583                 set -f
 584                 if [ "$source_root" = "$default_source_root" ]; then
 585                         for dir in \
 586                                 "/dev/**" \
 587                                 "/media/**" \
 588                                 "/mnt/**" \
 589                                 "/net/**" \
 590                                 "/proc/**" \
 591                                 "/run/**" \
 592                                 "/sys/**" \
 593                                 "/tmp/**" \
 594                                 "/var/cache/apt/**" \
 595                                 "/var/log/**" \
 596                                 "/var/tmp/**" \
 597                         ; do
 598                                 cmd="$cmd --exclude=$dir"
 599                         done
 600                 fi
 601                 [ -n "$exclude_args_add" ] && cmd="$cmd $exclude_args_add"
 602                 for dir in $exclude_dirs_add; do
 603                         cmd="$cmd --exclude=$dir"
 604                 done
 605                 [ -n "$rsync_args_add" ] && cmd="$cmd $rsync_args_add"
 606                 set +f
 607
 608                 [ "$local" -eq 0 ] \
 609                         && cmd="$cmd ${user}@${system}:$source_root $sys_target/" \
 610                         || cmd="$cmd $source_root $sys_target/"
 611         elif [[ "$backup_type" == "scp" ]]; then
 612                 cmd="scp"
 613                 [ "$VERBOSE" -eq 0 ] && cmd="$cmd -q"
 614                 for file in $files; do
 615                         cmd="$cmd ${user}@${system}:$file $sys_target/"
 616                 done
 617         else
 618                 echo "Backup type \"$backup_type\" undefined, \"$system\" skipped!"
 619                 echo; continue
 620         fi
 621
 622         echo "Backing up to \"$sys_target\" ..."
 623         echo -n "Start date: "; date
 624         echo "$cmd"
 625         count_started=$count_started+1
 626         ok=0
 627
 628         if [ "$DRYRUN" -eq 0 ]; then
 629                 stamp_file="$sys_target/.stamp"
 630                 rm -f "$stamp_file"
 631
 632                 # Execute backup command:
 633                 start_t=$(date "+%s")
 634                 $SHELL -c "$cmd"; ret=$?
 635                 end_t=$(date "+%s")
 636
 637                 echo "code=$ret" >"$stamp_file"
 638                 echo "start_t=$start_t" >>"$stamp_file"
 639                 echo "end_t=$end_t" >>"$stamp_file"
 640                 echo "cmd='$cmd'" >>"$stamp_file"
 641                 echo "backup_host='`hostname -f`'" >>"$stamp_file"
 642                 echo "backup_user='`id -un`'" >>"$stamp_file"
 643         else
 644                 echo " *** Trial run, not executing save command!"
 645                 ret=0
 646         fi
 647
 648         if [ $ret -eq 20 ]; then
 649                 echo "Backup of \"$system\" interrupted. Aborting ..."
 650                 GotSignal
 651         fi
 652
 653         echo -n "End date: "; date
 654         if [[ $ret -eq 0 || $ret -eq 24 ]]; then
 655                 [ $ret -eq 24 ] && count_ok_vanished=$count_ok_vanished+1
 656
 657                 echo "System \"$system\" completed with status $ret, OK."
 658                 [ "$DRYRUN" -gt 0 ] || count_ok=$count_ok+1
 659                 ok=1
 660         else
 661                 echo "System \"$system\" completed with ERRORS, code $ret!"
 662         fi
 663
 664         # execute job "post-exec" command, if any
 665         if [ -n "$job_post_exec" ]; then
 666                 ExecJob post "$job_post_exec"
 667         fi
 668
 669         if [ $generations -gt 0 ]; then
 670                 # Update "latest" symlink
 671                 if [ "$DRYRUN" -eq 0 ]; then
 672                         rm -f "$sys_root/latest"
 673                         ln -s "$sys_target" "$sys_root/latest"
 674                 fi
 675                 # Clean up old generations
 676                 declare -i gen_count=$generations+2
 677                 to_delete=$(ls -1t "$sys_root" 2>/dev/null | tail -n+$gen_count | sort)
 678                 if [[ -n "$to_delete" && $ok -eq 1 ]]; then
 679                         [ "$DRYRUN" -eq 0 ] \
 680                                 && echo "Deleting old backup generations (keep $generations) ..." \
 681                                 || echo " *** Trial run, not deleting old generations:"
 682                         for delete in $to_delete; do
 683                                 dir="$sys_root/$delete"
 684                                 if [ ! -e "$dir/.stamp" ]; then
 685                                         echo "Not deleting \"$dir\", not a backup directory!?"
 686                                         continue
 687                                 fi
 688                                 last=$(stat "$dir/.stamp" 2>/dev/null | grep "^Modify: " \
 689                                  | cut -d':' -f2- | cut -d. -f1)
 690                                 echo "Removing backup from" $last "..."
 691                                 if [ "$DRYRUN" -eq 0 ]; then
 692                                         DeleteSubvolume "$dir"
 693                                         [ $? -eq 0 ] || \
 694                                           echo "Failed to delete \"$dir\"!"
 695                                 fi
 696                         done
 697                         echo -n "Clean up finished: "; date
 698                 elif [ -n "$to_delete" ]; then
 699                         echo "There have been errors, not cleaning up old generations!"
 700                 else
 701                         echo "Nothing to clean up (keep up to $generations generations)."
 702                 fi
 703         fi
 704
 705         destinations="$destinations $target"
 706         echo
 707 done
 708
 709 sync
 710
 711 if [ "$DRYRUN" -eq 0 ]; then
 712         paths=""
 713         paths_zfs=""
 714         for dest in $(echo $destinations | sed -e 's/ /\n/g' | sort | uniq); do
 715                 fs=$(GetFS "$dest")
 716                 case $fs in
 717                   "zfs" )
 718                         paths_zfs="$paths_zfs $dest"
 719                         ;;
 720                   *)
 721                         paths="$paths $dest"
 722                 esac
 723         done
 724         if [ -n "$paths" ]; then
 725                 df -h $paths
 726                 echo
 727         fi
 728         if [ -n "$paths_zfs" ]; then
 729                 zfs list $paths_zfs
 730                 echo
 731         fi
 732 fi
 733
 734 CleanUp
 735
 736 echo -n "Done: "; date
 737 echo
 738 [ $count_all -eq 1 ] && s="" || s="s"
 739 echo " - $count_all job$s defined,"
 740 [ $count_started -eq 1 ] && s="" || s="s"
 741 echo " - $count_started job$s started,"
 742 echo " - $count_ok done without errors."
 743 echo
 744
 745 if [ $count_started -ne $count_ok ]; then
 746         echo "----->  THERE HAVE BEEN ERRORS!  <-----"
 747         echo
 748         exit 6
 749 elif [ $count_all -ne $count_started ]; then
 750         exit 7
 751 fi
 752
 753 # -eof-