bin/backup-script

   1 #!/bin/bash
   2 #
   3 # backup-script system for cloning systems using rsync
   4 # Copyright (c)2008-2017 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 PREPOSTEXEC=1
  20
  21 export LC_ALL=C
  22
  23 declare -i count_all=0
  24 declare -i count_started=0
  25 declare -i count_ok=0
  26 declare -i count_ok_vanished=0
  27 declare -i count_enabled=0
  28
  29 destinations=""
  30
  31 # Default settings, can be overwritten in backup-script.conf:
  32 [ -d "/usr/local/etc/backup-script.d" ] \
  33         && conf_d="/usr/local/etc/backup-script.d" \
  34         || conf_d="/etc/backup-script.d"
  35 setup_exec=""
  36 pre_exec=""
  37 post_exec=""
  38 default_backup_type="rsync"
  39 default_source_root="/"
  40 default_files="running-config"
  41 default_target="/var/backups"
  42 default_user="root"
  43 default_ssh_args_add=""
  44 default_rsync_args_add=""
  45 default_exclude_args_add=""
  46 default_exclude_dirs_add=""
  47 default_compress=1
  48 default_ping=1
  49 default_local=0
  50 default_generations=0
  51 default_io_timeout="1800"
  52 default_job_pre_exec=""
  53 default_job_post_exec=""
  54 default_tags=""
  55
  56 Usage() {
  57         {
  58                 echo "Usage: $NAME [<options>] [<job> [<job> [...]]]"
  59                 echo
  60                 echo "  -n, --dry-run       Test run only, don't copy any data."
  61                 echo "  -p, --progress      Show progress, see rsync(1)."
  62                 echo "  -t TAG, --tag TAG   Only run jobs with tag TAG."
  63                 echo "  -x, --no-exec       Don't run global pre-/post-exec commands."
  64                 echo
  65                 echo "When no <job> is given, all defined systems are used."
  66                 echo
  67                 # shellcheck disable=SC2086
  68                 echo -e $config_info
  69                 echo
  70         } >&2
  71         exit 2
  72 }
  73
  74 ErrorMsg () {
  75         printf "%s\n" "$@" >&2
  76 }
  77
  78 CleanUp() {
  79         if [[ -n "$pre_exec" && $PREPOSTEXEC -ne 0 ]]; then
  80                 echo "Executing \"$post_exec\" ..."
  81                 if ! sh -c $post_exec; then
  82                         ErrorMsg "Warning: post-exec command failed!"
  83                 fi
  84                 echo
  85         fi
  86         rm -f "$PIDFILE"
  87 }
  88
  89 GotSignal() {
  90         echo
  91         ErrorMsg "--> Got signal, cleaning up & aborting ..."
  92         echo
  93         CleanUp
  94         ErrorMsg -n "Aborted: " >&2; date
  95         echo
  96         sleep 3
  97         exit 9
  98 }
  99
 100 ExecJob() {
 101         local what="$1"
 102         local cmd="$2"
 103
 104         echo "Running job ${what}-exec command ..."
 105         [ "$local" -eq 0 ] \
 106                 && cmd="$ssh_cmd ${user}@${system} $cmd"
 107         echo -n "Start date (${what}-exec): "; date
 108         echo "$cmd"
 109         if [ "$DRYRUN" -eq 0 ]; then
 110                 $SHELL -c "$cmd"; local ret=$?
 111         else
 112                 echo " *** Trial run, not executing ${what}-exec command!"
 113                 ret=0
 114         fi
 115         if [ $ret -eq 0 ]; then
 116                 echo "The ${what}-exec command completed with status 0, OK."
 117         else
 118                 ErrorMsg "The ${what}-exec command completed with ERRORS, code $ret!"
 119         fi
 120         return $ret
 121 }
 122
 123 GetFS() {
 124         local dir="$1"
 125
 126         while [ -n "$dir" ]; do
 127                 findmnt -fn -o FSTYPE --raw "$dir" 2>/dev/null; local r=$?
 128                 if [ $r -eq 0 ]; then
 129                         return 0
 130                 elif [ $r -eq 127 ]; then
 131                         echo "UNKNOWN"
 132                         return 1
 133                 fi
 134                 dir=$(dirname "$dir") || return 1
 135         done
 136 }
 137
 138 CreateSubvolume() {
 139         local volume="$1"
 140         local fs
 141         local dir
 142
 143         dir=$(dirname "$volume")
 144         fs=$(GetFS "$dir")
 145         case "$fs" in
 146           "btrfs")
 147                 btrfs subvolume create "$volume"  >/dev/null || return 1
 148                 ;;
 149           "zfs")
 150                 zfs create "$(echo "$volume" | cut -c2-)" || return 1
 151                 ;;
 152           *)
 153                 ErrorMsg "CreateSubvolume: Incompatible FS type \"$fs\" on \"$dir\"!"
 154                 return 9
 155         esac
 156         return 0
 157 }
 158
 159 CloneSubvolume() {
 160         local source="$1"
 161         local volume="$2"
 162         local snapshot="$3"
 163         local dir
 164         local fs
 165         local link_name
 166
 167         dir=$(dirname "source")
 168         fs=$(GetFS "$source")
 169         case "$fs" in
 170           "btrfs")
 171                 btrfs subvolume snapshot "$source" "$snapshot"  >/dev/null || return 1
 172                 ;;
 173           "zfs")
 174                 zfs snapshot "$snapshot" || return 1
 175                 link_name="$(echo "$snapshot" | cut -d@ -f2-)"
 176                 ln -s \
 177                         "current/.zfs/snapshot/$link_name" \
 178                         "$(dirname "$volume")/$link_name"
 179                 ;;
 180           *)
 181                 ErrorMsg "CloneSubvolume: Incompatible FS type \"$fs\" on \"$source\"!"
 182                 return 9
 183         esac
 184         return 0
 185 }
 186
 187 RenameSubvolume() {
 188         local source="$1"
 189         local target="$2"
 190         local fs
 191
 192         fs=$(GetFS "$source")
 193         case "$fs" in
 194           "btrfs")
 195                 mv "$source" "$target" || return 1
 196                 ;;
 197           "zfs")
 198                 zfs rename \
 199                   "$(echo "$source" | cut -c2-)" \
 200                   "$(echo "$target" | cut -c2-)" \
 201                         || return 1
 202                 ;;
 203           *)
 204                 ErrorMsg "RenameSubvolume: Incompatible FS type \"$fs\" on \"$source\"!"
 205                 return 9
 206         esac
 207         return 0
 208 }
 209
 210 DeleteSubvolume() {
 211         local volume="$1"
 212         local fs
 213         local id
 214         local snapshot
 215
 216         fs=$(GetFS "$volume")
 217         case "$fs" in
 218           "btrfs")
 219                 btrfs subvolume delete "$volume" >/dev/null || return 1
 220                 ;;
 221           "zfs")
 222                 id="$(basename "$volume")"
 223                 if [ -h "$volume" ]; then
 224                         snapshot="$(dirname "$volume")/current@$id"
 225                 else
 226                         snapshot="$volume"
 227                 fi
 228                 zfs destroy -r "$(echo "$snapshot" | cut -c2-)" >/dev/null || return 1
 229                 [ -h "$volume" ] && rm "$volume"
 230                 ;;
 231           *)
 232                 ErrorMsg "DeleteSubvolume: Incompatible FS type \"$fs\" on \"$volume\"!"
 233                 return 9
 234         esac
 235         return 0
 236 }
 237
 238 Initialize_Last_SysTarget_Snapshot() {
 239         sys_target="$1"
 240         unset last
 241         unset snapshot
 242
 243         fs=$(GetFS "$sys_target")
 244         case "$fs" in
 245           "btrfs")
 246                 # Search directory of last generation, if any
 247                 # shellcheck disable=SC2012
 248                 last=$(ls -1d "$sys_target"/[0-9]* 2>/dev/null | sort -r | head -n1)
 249                 if [ -n "$last" ]; then
 250                         if [ ! -d "$last" ]; then
 251                                 ErrorMsg "Last snapshot \"$last\" seems not to be a directory!? \"$system\" skipped!"
 252                                 echo
 253                                 return 1
 254                         fi
 255                 fi
 256                 sys_target="$sys_target/$(date +%Y%m%d-%H%M%S)"
 257                 snapshot="$sys_target"
 258                 ;;
 259           "zfs")
 260                 # On ZFS, the last generation is always named "current"
 261                 if [ -e "$sys_target/current" ]; then
 262                         last="$sys_target/current"
 263                         if [ "$(uname)" = "Linux" ]; then
 264                                 date=$(LC_ALL=C stat "$1" | grep "^Modify: " \
 265                                  | cut -d':' -f2- | cut -d. -f1)
 266                         else
 267                                 date=$(LC_ALL=C stat -f "%Sc" "$1")
 268                         fi
 269                         date=$(echo "$date" | sed -e's/^ //g' -e 's/[-:]//g' -e 's/ /-/g')
 270
 271                 else
 272                         last=""
 273                         date="$(date +%Y%m%d-%H%M%S)"
 274                 fi
 275                 snapshot="$(echo "$sys_target/current" | cut -c2-)@$date"
 276                 sys_target="$sys_target/current"
 277                 ;;
 278           *)
 279                 ErrorMsg "Initialize_Last_SysTarget_Snapshot: Incompatible FS type \"$fs\" on \"$sys_target\"!"
 280                 return 1
 281         esac
 282         return 0
 283 }
 284
 285 # Search configuration file (last one is used as default!)
 286 for conf in \
 287         "/usr/local/etc/backup-script.conf" \
 288         "/etc/backup-script.conf" \
 289         "${conf_d}/backup-script.conf" \
 290         "/usr/local/etc/backup-script.conf" \
 291 ; do
 292         [ -r "$conf" ] && break
 293 done
 294
 295 # Read in configuration file
 296 config_info="Configuration file is \"$conf\""
 297 if [ -r "$conf" ]; then
 298         # shellcheck source=/dev/null
 299         source "$conf"
 300 else
 301         config_info="${config_info} (not readable, using defaults)"
 302 fi
 303 config_info="${config_info},\nusing \"$conf_d\" as configuration directory."
 304
 305 while [ $# -gt 0 ]; do
 306         case "$1" in
 307           "-n"|"--dry-run")
 308                 DRYRUN=1; shift
 309                 ;;
 310           "-p"|"--progress")
 311                 VERBOSE=1; shift
 312                 ;;
 313           "-t"|"--tag")
 314                 shift; TAG="$1"; shift
 315                 [ -n "$TAG" ] || Usage
 316                 ;;
 317           "-x"|"--no-exec")
 318                 PREPOSTEXEC=0; shift
 319                 ;;
 320           "-"*)
 321                 Usage
 322                 ;;
 323           *)
 324                 break
 325         esac
 326 done
 327
 328 echo -n "Started: "; date
 329 echo -e "$config_info"
 330
 331 # Check rsync and its protocol version
 332 if ! rsync=$(which "rsync" 2>/dev/null); then
 333         ErrorMsg "Failed to detect rsync(1)! Is it installed in your \$PATH?"
 334         exit 1
 335 fi
 336 if ! rsync_proto=$($rsync --version 2>/dev/null | head -n 1 | sed 's/.*  protocol version \([0-9]*\)$/\1/'); then
 337         ErrorMsg "Failed to detect protocol version of $rsync!"
 338         exit 1
 339 fi
 340 echo "Rsync command is $rsync, protocol version $rsync_proto."
 341
 342 [[ -n "$TAG" ]] && echo "Running jobs tagged with \"$TAG\"."
 343 echo
 344
 345 if [ $# -ge 1 ]; then
 346         for s in "$@"; do
 347                 if [ ! -r "${conf_d}/$s" ]; then
 348                         ErrorMsg "$NAME: Can' read \"${conf_d}/$s\"!"
 349                         exit 3
 350                 fi
 351                 sys+=("${conf_d}/$s")
 352         done
 353 else
 354         sys=("${conf_d}/"*)
 355 fi
 356
 357 if [[ -n "$setup_exec" && $PREPOSTEXEC -ne 0 ]]; then
 358         echo "Executing \"$setup_exec\" ..."
 359         if ! sh -c $setup_exec; then
 360                 ErrorMsg "Error: setup command failed!"; echo
 361                 ErrorMsg "Aborting backup."; echo
 362                 exit 5
 363         fi
 364         sleep 2
 365         echo
 366 fi
 367
 368 trap GotSignal SIGINT SIGTERM
 369
 370 # check and create PID file
 371 if [ -e "$PIDFILE" ]; then
 372         ErrorMsg "Lockfile \"$PIDFILE\" already exists."
 373         ErrorMsg "Is an other instance still running?"
 374         echo
 375         ErrorMsg -n "Aborted: " >&2; date
 376         echo
 377         exit 4
 378 fi
 379 if ! touch "$PIDFILE" 2>/dev/null; then
 380         ErrorMsg "Warning: can't create PID file \"$PIDFILE\"!"
 381         echo
 382 else
 383         echo "$$" >>"$PIDFILE"
 384 fi
 385
 386 if [[ -n "$pre_exec" && $PREPOSTEXEC -ne 0 ]]; then
 387         echo "Executing \"$pre_exec\" ..."
 388         if ! sh -c $pre_exec; then
 389                 ErrorMsg "Error: pre-exec command failed!"; echo
 390                 CleanUp
 391                 ErrorMsg "Aborting backup."; echo
 392                 exit 5
 393         fi
 394         sleep 2
 395         echo
 396 fi
 397
 398 for f in "${sys[@]}"; do
 399         [[ -r "$f" && -f "$f" ]] || continue
 400
 401         fname=$(basename "$f")
 402         case "$fname" in
 403                 "backup-script.conf"|*.sh)
 404                         continue
 405                         ;;
 406         esac
 407
 408         # Set global defaults
 409         system="$fname"
 410         backup_type="$default_backup_type"
 411         user="$default_user"
 412         source_root="$default_source_root"
 413         files="$default_files"
 414         target="$default_target"
 415         ssh_args_add="$default_ssh_args_add"
 416         rsync_args_add="$default_rsync_args_add"
 417         exclude_args_add="$default_exclude_args_add"
 418         exclude_dirs_add="$default_exclude_dirs_add"
 419         compress="$default_compress"
 420         ping="$default_ping"
 421         local="$default_local"
 422         generations="$default_generations"
 423         job_pre_exec="$default_job_pre_exec"
 424         job_post_exec="$default_job_post_exec"
 425         tags="$default_tags"
 426         io_timeout="$default_io_timeout"
 427
 428         # Compatibility with backup-pull(1) script: Save global values ...
 429         pre_exec_saved="$pre_exec"
 430         post_exec_saved="$post_exec"
 431
 432         # Compatibility with backup-pull(1) script: Set defaults
 433         host=""
 434         unset source
 435         unset pre_exec
 436         unset post_exec
 437
 438         # Read in system configuration file
 439         # shellcheck source=/dev/null
 440         source "$f"
 441
 442         # Compatibility with backup-pull(1) script: Fix up configuration
 443         [[ "$system" = "$fname" && -n "$host" ]] \
 444                 && system="$host"
 445         [[ "$source_root" = "$default_source_root" && -n "$source" ]] \
 446                 && source_root="$source"
 447         [[ -z "$job_pre_exec" && -n "$pre_exec" ]] \
 448                 && job_pre_exec="$pre_exec"
 449         [[ -z "$job_post_exec" && -n "$post_exec" ]] \
 450                 && job_post_exec="$post_exec"
 451
 452         # Compatibility with backup-pull(1) script: Restore global values ...
 453         pre_exec="$pre_exec_saved"
 454         post_exec="$post_exec_saved"
 455
 456         # Validate configuration
 457         if [[ "$system" = "localhost" || "$system" = "127.0.0.1" ]]; then
 458                 # Local system
 459                 local=1
 460                 compress=0
 461         fi
 462
 463         # Add "NONE" tag when no tags are given in the config file:
 464         [[ -z "$tags" ]] && tags="NONE"
 465         # Add "auto-tags":
 466         [[ "$local" -eq 1 ]] && tags="$tags,LOCAL"
 467         # Check tags
 468         if [[ -n "$TAG" && "$TAG" != "ALL" ]]; then
 469                 if ! echo "$tags" | grep -E "(^|,)$TAG(,|$)" >/dev/null 2>&1; then
 470                         if [ "$DRYRUN" -ne 0 ]; then
 471                                 echo "Tags of system \"$system\" don't match \"$TAG\": \"$tags\". Skipped."
 472                                 echo
 473                         fi
 474                         continue
 475                 fi
 476         fi
 477
 478         # Make sure "source_root" ends with a slash ("/")
 479         case "$source_root" in
 480           *"/")
 481                 ;;
 482           *)
 483                 source_root="$source_root/"
 484         esac
 485
 486         # Make sure "target" DOESN'T end with a slash ("/")
 487         case "$target" in
 488           "*/")
 489                 target=$( echo "$target" | sed -e 's/\/$//g' )
 490                 ;;
 491         esac
 492
 493         [ "$system" = "$fname" ] \
 494                 && systxt="\"$system\"" \
 495                 || systxt="\"$fname\" [\"$system\"]"
 496         [ "$local" -eq 0 ] \
 497                 && echo "Working on $systxt ..." \
 498                 || echo "Working on $systxt (local system) ..."
 499
 500         count_all=$count_all+1
 501
 502         # Check if job is disabled
 503         if [ "$backup_type" = "disabled" ]; then
 504                 echo "Job is DISABLED and will be skipped."
 505                 echo; continue
 506         fi
 507
 508         count_enabled=$count_enabled+1
 509
 510         # Check target directory
 511         if [ -z "$target" ]; then
 512                 ErrorMsg "No target directory specified for \"$system\"!? Skipped!"
 513                 echo; continue
 514         fi
 515         if [ ! -d "$target" ]; then
 516                 ErrorMsg "Target \"$target\" is not a directory!? \"$system\" skipped!"
 517                 echo; continue
 518         fi
 519
 520         sys_target="$target/$fname"
 521         sys_root="$sys_target"
 522         if [[ "$DRYRUN" -eq 0 && ! -e "$sys_target" ]]; then
 523                 if [ $generations -gt 0 ]; then
 524                         CreateSubvolume "$sys_target"; r=$?
 525                 else
 526                         mkdir -p "$sys_target"; r=$?
 527                 fi
 528                 if [ $r -ne 0 ]; then
 529                         ErrorMsg "Can't create \"$sys_target\"!? \"$system\" skipped!"
 530                         echo; continue
 531                 fi
 532         fi
 533
 534         if [[ "$local" -eq 0 && "$ping" -ne 0 ]]; then
 535                 # Check if system is alive
 536                 if ! ping -c 1 "$system" >/dev/null 2>&1; then
 537                         ErrorMsg "Host \"$system\" seems not to be alive!? Skipped."
 538                         echo; continue
 539                 fi
 540                 echo "OK, host \"$system\" seems to be alive."
 541         fi
 542
 543         if [ $generations -gt 0 ]; then
 544                 # Make sure no old backup is stored in system directory
 545                 if [ -e "$sys_target/.stamp" ]; then
 546                         # There seems to be a genearation-less backup in the
 547                         # target directory!
 548                         ErrorMsg "Target directory \"$sys_target\" seems to be unclean!? \"$system\" skipped!"
 549                         echo; continue
 550                 fi
 551
 552                 Initialize_Last_SysTarget_Snapshot "$sys_target" || continue
 553
 554                 if [[ -n "$last" && ! -e "$last/.stamp" ]]; then
 555                         # Old backup directory without "stamp file", continue
 556                         echo "Found incomplete snapshot in \"$last\", reusing and renaming it ..."
 557                         if [ "$DRYRUN" -eq 0 ]; then
 558                                 if ! RenameSubvolume "$last" "$sys_target"; then
 559                                         ErrorMsg "Failed to rename last snapshot \"$last\" to \"$sys_target\"!? \"$system\" skipped!"
 560                                         echo; continue
 561                                 fi
 562                         else
 563                                 echo " *** Trial run, not renaming snapshot \"$last\" to \"$sys_target\"!"
 564                         fi
 565                 elif [ -n "$last" ]; then
 566                         # Old backup directory found, create new snapshot
 567                         echo "Found last snapshot in \"$last\"."
 568                         if [ "$DRYRUN" -eq 0 ]; then
 569                                 CloneSubvolume "$last" "$sys_target" "$snapshot"; r=$?
 570                                 if [ $r -ne 0 ]; then
 571                                         ErrorMsg "Can't create snapshot \"$snapshot\" of \"$last\", code $r!? \"$system\" skipped!"
 572                                         echo; continue
 573                                 fi
 574                                 echo "Created new snapshot in \"$snapshot\"."
 575                         else
 576                                 echo " *** Trial run, not creating new snapshot in \"$snapshot\"!"
 577                         fi
 578                 else
 579                         # No old backup found, create new subvolume
 580                         if [ "$DRYRUN" -eq 0 ]; then
 581                                 CreateSubvolume "$sys_target"; r=$?
 582                                 if [ $r -ne 0 ]; then
 583                                         ErrorMsg "Can't create subvolume \"$sys_target\", code $r!? \"$system\" skipped!"
 584                                         echo; continue
 585                                 fi
 586                                 echo "Created new subvolume in \"$sys_target\"."
 587                         else
 588                                 echo " *** Trial run, not creating new subvolume \"$sys_target\"!"
 589                         fi
 590                 fi
 591         fi
 592
 593         ssh_cmd="ssh"
 594         [ -n "$ssh_args_add" ] && ssh_cmd="$ssh_cmd $ssh_args_add"
 595
 596         # execute job "pre-exec" command, if any
 597         if [ -n "$job_pre_exec" ]; then
 598                 ExecJob pre "$job_pre_exec" ; ret=$?
 599                 if [ $ret -ne 0 ]; then
 600                         [ $ret -ne 99 ] && count_started=$count_started+1
 601                         ErrorMsg "Pre-exec command failed, \"$system\" skipped!"
 602                         echo; continue
 603                 fi
 604         fi
 605
 606         # prepare (remote) command ...
 607         if [[ "$backup_type" == "rsync" ]]; then
 608                 cmd="$rsync --archive --timeout=$io_timeout"
 609                 [ "$compress" -ne 0 ] && cmd="$cmd --compress"
 610                 [ "$local" -eq 0 ] && cmd="$cmd --rsh=\"$ssh_cmd\""
 611                 cmd="$cmd --delete-during --delete-excluded --sparse"
 612                 if [ "$VERBOSE" -gt 0 ]; then
 613                         [ "$rsync_proto" -ge 31 ] \
 614                                 && cmd="$cmd --info=progress2" \
 615                                 || cmd="$cmd --progress"
 616                 fi
 617                 set -f
 618                 if [ "$source_root" = "$default_source_root" ]; then
 619                         for dir in \
 620                                 "/dev/**" \
 621                                 "/media/**" \
 622                                 "/mnt/**" \
 623                                 "/net/**" \
 624                                 "/proc/**" \
 625                                 "/run/**" \
 626                                 "/sys/**" \
 627                                 "/tmp/**" \
 628                                 "/var/cache/apt/**" \
 629                                 "/var/log/**" \
 630                                 "/var/tmp/**" \
 631                         ; do
 632                                 cmd="$cmd --exclude=$dir"
 633                         done
 634                 fi
 635                 [ -n "$exclude_args_add" ] && cmd="$cmd $exclude_args_add"
 636                 for dir in $exclude_dirs_add; do
 637                         cmd="$cmd --exclude=$dir"
 638                 done
 639                 [ -n "$rsync_args_add" ] && cmd="$cmd $rsync_args_add"
 640                 set +f
 641
 642                 [ "$local" -eq 0 ] \
 643                         && cmd="$cmd ${user}@${system}:$source_root $sys_target/" \
 644                         || cmd="$cmd $source_root $sys_target/"
 645         elif [[ "$backup_type" == "scp" ]]; then
 646                 cmd="scp"
 647                 [ "$VERBOSE" -eq 0 ] && cmd="$cmd -q"
 648                 for file in $files; do
 649                         cmd="$cmd ${user}@${system}:$file $sys_target/"
 650                 done
 651         else
 652                 ErrorMsg "Backup type \"$backup_type\" undefined, \"$system\" skipped!"
 653                 echo; continue
 654         fi
 655
 656         echo "Backing up to \"$sys_target\" ..."
 657         echo -n "Start date: "; date
 658         echo "$cmd"
 659         count_started=$count_started+1
 660         ok=0
 661
 662         if [ "$DRYRUN" -eq 0 ]; then
 663                 stamp_file="$sys_target/.stamp"
 664                 rm -f "$stamp_file"
 665
 666                 # Execute backup command:
 667                 start_t=$(date "+%s")
 668                 $SHELL -c "$cmd"; ret=$?
 669                 end_t=$(date "+%s")
 670
 671                 {
 672                         echo "code=$ret"
 673                         echo "start_t=$start_t"
 674                         echo "end_t=$end_t"
 675                         echo "cmd='$cmd'"
 676                         echo "backup_host='$(hostname -f)'"
 677                         echo "backup_user='$(id -un)'"
 678                 } >"$stamp_file"
 679         else
 680                 echo " *** Trial run, not executing save command!"
 681                 ret=0
 682         fi
 683
 684         if [ $ret -eq 20 ]; then
 685                 ErrorMsg "Backup of \"$system\" interrupted. Aborting ..."
 686                 GotSignal
 687         fi
 688
 689         echo -n "End date: "; date
 690         if [[ $ret -eq 0 || $ret -eq 24 ]]; then
 691                 [ $ret -eq 24 ] && count_ok_vanished=$count_ok_vanished+1
 692
 693                 echo "System \"$system\" completed with status $ret, OK."
 694                 [ "$DRYRUN" -gt 0 ] || count_ok=$count_ok+1
 695                 ok=1
 696         else
 697                 ErrorMsg "System \"$system\" completed with ERRORS, code $ret!"
 698         fi
 699
 700         # execute job "post-exec" command, if any
 701         if [ -n "$job_post_exec" ]; then
 702                 ExecJob post "$job_post_exec"
 703         fi
 704
 705         if [ $generations -gt 0 ]; then
 706                 # Update "latest" symlink
 707                 if [ "$DRYRUN" -eq 0 ]; then
 708                         rm -f "$sys_root/latest"
 709                         ln -s "$sys_target" "$sys_root/latest"
 710                 fi
 711                 # Clean up old generations
 712                 declare -i gen_count=$generations+2
 713                 # shellcheck disable=SC2012
 714                 to_delete=$(ls -1t "$sys_root" 2>/dev/null | tail -n+$gen_count | sort)
 715                 if [[ -n "$to_delete" && $ok -eq 1 ]]; then
 716                         [ "$DRYRUN" -eq 0 ] \
 717                                 && echo "Deleting old backup generations (keep $generations) ..." \
 718                                 || echo " *** Trial run, not deleting old generations:"
 719                         for delete in $to_delete; do
 720                                 dir="$sys_root/$delete"
 721                                 if [ ! -e "$dir/.stamp" ]; then
 722                                         ErrorMsg "Not deleting \"$dir\" of \"$system\", not a backup directory!?"
 723                                         continue
 724                                 fi
 725                                 last=$(stat "$dir/.stamp" 2>/dev/null | grep "^Modify: " \
 726                                  | cut -d':' -f2- | cut -d. -f1)
 727                                 # shellcheck disable=SC2086
 728                                 echo "Removing backup from" $last "..."
 729                                 if [ "$DRYRUN" -eq 0 ]; then
 730                                         DeleteSubvolume "$dir" \
 731                                                 || ErrorMsg "Failed to delete \"$dir\" of \"$system\"!"
 732                                 fi
 733                         done
 734                         echo -n "Clean up finished: "; date
 735                 elif [ -n "$to_delete" ]; then
 736                         ErrorMsg "There have been errors for \"$system\", not cleaning up old generations!"
 737                 else
 738                         echo "Nothing to clean up (keep up to $generations generations)."
 739                 fi
 740         fi
 741
 742         destinations="$destinations $target"
 743         echo
 744 done
 745
 746 sync
 747
 748 if [ "$DRYRUN" -eq 0 ]; then
 749         paths=""
 750         paths_zfs=""
 751         # shellcheck disable=SC2086
 752         for dest in $(echo $destinations | sed -e 's/ /\n/g' | sort | uniq); do
 753                 fs=$(GetFS "$dest")
 754                 case $fs in
 755                   "zfs" )
 756                         paths_zfs="$paths_zfs $dest"
 757                         ;;
 758                   *)
 759                         paths="$paths $dest"
 760                 esac
 761         done
 762         if [ -n "$paths" ]; then
 763                 # shellcheck disable=SC2086
 764                 df -h $paths
 765                 echo
 766         fi
 767         if [ -n "$paths_zfs" ]; then
 768                 # shellcheck disable=SC2086
 769                 zfs list $paths_zfs
 770                 echo
 771         fi
 772 fi
 773
 774 CleanUp
 775
 776 echo -n "Done: "; date
 777 echo
 778 [ $count_all -eq 1 ] && s="" || s="s"
 779 [ $count_enabled -eq $count_all ] \
 780         && echo " - $count_all job$s defined (all enabled)," \
 781         || echo " - $count_all job$s defined ($count_enabled enabled),"
 782 [ $count_started -eq 1 ] && s="" || s="s"
 783 echo " - $count_started job$s started,"
 784 echo " - $count_ok done without errors."
 785 echo
 786
 787 if [ $count_started -ne $count_ok ]; then
 788         echo "----->  THERE HAVE BEEN ERRORS!  <-----"
 789         echo
 790         exit 6
 791 elif [ $count_enabled -ne $count_started ]; then
 792         exit 7
 793 fi
 794
 795 # -eof-