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 # Set shell options.
  57 shopt -s nullglob
  58
  59 Usage() {
  60         {
  61                 echo "Usage: $NAME [<options>] [<job> [<job> [...]]]"
  62                 echo
  63                 echo "  -n, --dry-run       Test run only, don't copy any data."
  64                 echo "  -p, --progress      Show progress, see rsync(1)."
  65                 echo "  -t TAG, --tag TAG   Only run jobs with tag TAG."
  66                 echo "  -x, --no-exec       Don't run global pre-/post-exec commands."
  67                 echo
  68                 echo "When no <job> is given, all defined systems are used."
  69                 echo
  70                 # shellcheck disable=SC2086
  71                 echo -e $config_info
  72                 echo
  73         } >&2
  74         exit 2
  75 }
  76
  77 ErrorMsg () {
  78         printf "%s\\n" "$@" >&2
  79 }
  80
  81 CleanUp() {
  82         if [[ -n "$pre_exec" && $PREPOSTEXEC -ne 0 ]]; then
  83                 echo "Executing \"$post_exec\" ..."
  84                 if ! sh -c $post_exec; then
  85                         ErrorMsg "Warning: post-exec command failed!"
  86                 fi
  87                 echo
  88         fi
  89         rm -f "$PIDFILE"
  90 }
  91
  92 GotSignal() {
  93         echo
  94         ErrorMsg "--> Got signal, cleaning up & aborting ..."
  95         echo
  96         CleanUp
  97         ErrorMsg "Aborted: $(date)" >&2
  98         echo
  99         sleep 3
 100         exit 9
 101 }
 102
 103 ExecJob() {
 104         local what="$1"
 105         local cmd="$2"
 106
 107         echo "Running job ${what}-exec command ..."
 108         [ "$local" -eq 0 ] \
 109                 && cmd="$ssh_cmd ${user}@${system} $cmd"
 110         echo "Start date (${what}-exec): $(date)"
 111         echo "$cmd"
 112         if [ "$DRYRUN" -eq 0 ]; then
 113                 $SHELL -c "$cmd"; local ret=$?
 114         else
 115                 echo " *** Trial run, not executing ${what}-exec command!"
 116                 ret=0
 117         fi
 118         if [ $ret -eq 0 ]; then
 119                 echo "The ${what}-exec command completed with status 0, OK."
 120         else
 121                 ErrorMsg "The ${what}-exec command completed with ERRORS, code $ret!"
 122         fi
 123         return $ret
 124 }
 125
 126 GetFS() {
 127         local dir="$1"
 128
 129         while [ -n "$dir" ]; do
 130                 findmnt -fn -o FSTYPE --raw "$dir" 2>/dev/null; local r=$?
 131                 if [ $r -eq 0 ]; then
 132                         return 0
 133                 elif [ $r -eq 127 ]; then
 134                         echo "UNKNOWN"
 135                         return 1
 136                 fi
 137                 dir=$(dirname "$dir") || return 1
 138         done
 139 }
 140
 141 CreateSubvolume() {
 142         local volume="$1"
 143         local fs
 144         local dir
 145
 146         dir=$(dirname "$volume")
 147         fs=$(GetFS "$dir")
 148         case "$fs" in
 149           "btrfs")
 150                 btrfs subvolume create "$volume"  >/dev/null || return 1
 151                 ;;
 152           "zfs")
 153                 zfs create "$(echo "$volume" | cut -c2-)" || return 1
 154                 ;;
 155           *)
 156                 ErrorMsg "CreateSubvolume: Incompatible FS type \"$fs\" on \"$dir\"!"
 157                 return 9
 158         esac
 159         return 0
 160 }
 161
 162 CloneSubvolume() {
 163         local source="$1"
 164         local volume="$2"
 165         local snapshot="$3"
 166         local dir
 167         local fs
 168         local link_name
 169
 170         dir=$(dirname "source")
 171         fs=$(GetFS "$source")
 172         case "$fs" in
 173           "btrfs")
 174                 btrfs subvolume snapshot "$source" "$snapshot"  >/dev/null || return 1
 175                 ;;
 176           "zfs")
 177                 zfs snapshot "$snapshot" || return 1
 178                 link_name="$(echo "$snapshot" | cut -d@ -f2-)"
 179                 ln -s \
 180                         "current/.zfs/snapshot/$link_name" \
 181                         "$(dirname "$volume")/$link_name"
 182                 ;;
 183           *)
 184                 ErrorMsg "CloneSubvolume: Incompatible FS type \"$fs\" on \"$source\"!"
 185                 return 9
 186         esac
 187         return 0
 188 }
 189
 190 RenameSubvolume() {
 191         local source="$1"
 192         local target="$2"
 193         local fs
 194
 195         fs=$(GetFS "$source")
 196         case "$fs" in
 197           "btrfs")
 198                 mv "$source" "$target" || return 1
 199                 ;;
 200           "zfs")
 201                 zfs rename \
 202                   "$(echo "$source" | cut -c2-)" \
 203                   "$(echo "$target" | cut -c2-)" \
 204                         || return 1
 205                 ;;
 206           *)
 207                 ErrorMsg "RenameSubvolume: Incompatible FS type \"$fs\" on \"$source\"!"
 208                 return 9
 209         esac
 210         return 0
 211 }
 212
 213 DeleteSubvolume() {
 214         local volume="$1"
 215         local fs
 216         local id
 217         local snapshot
 218
 219         fs=$(GetFS "$volume")
 220         case "$fs" in
 221           "btrfs")
 222                 btrfs subvolume delete "$volume" >/dev/null || return 1
 223                 ;;
 224           "zfs")
 225                 id="$(basename "$volume")"
 226                 if [ -h "$volume" ]; then
 227                         snapshot="$(dirname "$volume")/current@$id"
 228                 else
 229                         snapshot="$volume"
 230                 fi
 231                 zfs destroy -r "$(echo "$snapshot" | cut -c2-)" >/dev/null || return 1
 232                 [ -h "$volume" ] && rm "$volume"
 233                 ;;
 234           *)
 235                 ErrorMsg "DeleteSubvolume: Incompatible FS type \"$fs\" on \"$volume\"!"
 236                 return 9
 237         esac
 238         return 0
 239 }
 240
 241 Initialize_Last_SysTarget_Snapshot() {
 242         sys_target="$1"
 243         unset last
 244         unset snapshot
 245
 246         fs=$(GetFS "$sys_target")
 247         case "$fs" in
 248           "btrfs")
 249                 # Search directory of last generation, if any
 250                 # shellcheck disable=SC2012
 251                 last=$(ls -1d "$sys_target"/[0-9]* 2>/dev/null | sort -r | head -n1)
 252                 if [ -n "$last" ]; then
 253                         if [ ! -d "$last" ]; then
 254                                 ErrorMsg "Last snapshot \"$last\" seems not to be a directory!? \"$system\" skipped!"
 255                                 echo
 256                                 return 1
 257                         fi
 258                 fi
 259                 sys_target="$sys_target/$(date +%Y%m%d-%H%M%S)"
 260                 snapshot="$sys_target"
 261                 ;;
 262           "zfs")
 263                 # On ZFS, the last generation is always named "current"
 264                 if [ -e "$sys_target/current" ]; then
 265                         last="$sys_target/current"
 266                         if [ "$(uname)" = "Linux" ]; then
 267                                 date=$(LC_ALL=C stat "$1" | grep "^Modify: " \
 268                                  | cut -d':' -f2- | cut -d. -f1)
 269                         else
 270                                 date=$(LC_ALL=C stat -f "%Sc" "$1")
 271                         fi
 272                         date=$(echo "$date" | sed -e's/^ //g' -e 's/[-:]//g' -e 's/ /-/g')
 273
 274                 else
 275                         last=""
 276                         date="$(date +%Y%m%d-%H%M%S)"
 277                 fi
 278                 snapshot="$(echo "$sys_target/current" | cut -c2-)@$date"
 279                 sys_target="$sys_target/current"
 280                 ;;
 281           *)
 282                 ErrorMsg "Initialize_Last_SysTarget_Snapshot: Incompatible FS type \"$fs\" on \"$sys_target\"!"
 283                 return 1
 284         esac
 285         return 0
 286 }
 287
 288 # Search configuration file (last one is used as default!)
 289 for conf in \
 290         "/usr/local/etc/backup-script.conf" \
 291         "/etc/backup-script.conf" \
 292         "${conf_d}/backup-script.conf" \
 293         "/usr/local/etc/backup-script.conf" \
 294 ; do
 295         [ -r "$conf" ] && break
 296 done
 297
 298 # Read in configuration file
 299 config_info="Configuration file is \"$conf\""
 300 if [ -r "$conf" ]; then
 301         # shellcheck source=/dev/null
 302         source "$conf"
 303 else
 304         config_info="${config_info} (not readable, using defaults)"
 305 fi
 306 config_info="${config_info},\\nusing \"$conf_d\" as configuration directory."
 307
 308 while [ $# -gt 0 ]; do
 309         case "$1" in
 310           "-n"|"--dry-run")
 311                 DRYRUN=1; shift
 312                 ;;
 313           "-p"|"--progress")
 314                 VERBOSE=1; shift
 315                 ;;
 316           "-t"|"--tag")
 317                 shift; TAG="$1"; shift
 318                 [ -n "$TAG" ] || Usage
 319                 ;;
 320           "-x"|"--no-exec")
 321                 PREPOSTEXEC=0; shift
 322                 ;;
 323           "-"*)
 324                 Usage
 325                 ;;
 326           *)
 327                 break
 328         esac
 329 done
 330
 331 echo "Started: $(date)"
 332 echo -e "$config_info"
 333
 334 # Check rsync and its protocol version
 335 if ! rsync=$(which "rsync" 2>/dev/null); then
 336         ErrorMsg "Failed to detect rsync(1)! Is it installed in your \$PATH?"
 337         exit 1
 338 fi
 339 if ! rsync_proto=$($rsync --version 2>/dev/null | head -n 1 | sed 's/.*  protocol version \([0-9]*\)$/\1/'); then
 340         ErrorMsg "Failed to detect protocol version of $rsync!"
 341         exit 1
 342 fi
 343 echo "Rsync command is $rsync, protocol version $rsync_proto."
 344
 345 [[ -n "$TAG" ]] && echo "Running jobs tagged with \"$TAG\"."
 346 echo
 347
 348 if [ $# -ge 1 ]; then
 349         for s in "$@"; do
 350                 if [ ! -r "${conf_d}/$s" ]; then
 351                         ErrorMsg "$NAME: Can' read \"${conf_d}/$s\"!"
 352                         exit 3
 353                 fi
 354                 sys+=("${conf_d}/$s")
 355         done
 356 else
 357         sys=("${conf_d}/"*)
 358 fi
 359
 360 if [[ -n "$setup_exec" && $PREPOSTEXEC -ne 0 ]]; then
 361         echo "Executing \"$setup_exec\" ..."
 362         if ! sh -c $setup_exec; then
 363                 ErrorMsg "Error: setup command failed!"; echo
 364                 ErrorMsg "Aborting backup."; echo
 365                 exit 5
 366         fi
 367         sleep 2
 368         echo
 369 fi
 370
 371 trap GotSignal SIGINT SIGTERM
 372
 373 # check and create PID file
 374 if [ -e "$PIDFILE" ]; then
 375         ErrorMsg "Lockfile \"$PIDFILE\" already exists."
 376         ErrorMsg "Is an other instance still running?"
 377         echo
 378         ErrorMsg "Aborted: $(date)" >&2
 379         echo
 380         exit 4
 381 fi
 382 if ! touch "$PIDFILE" 2>/dev/null; then
 383         ErrorMsg "Warning: can't create PID file \"$PIDFILE\"!"
 384         echo
 385 else
 386         echo "$$" >>"$PIDFILE"
 387 fi
 388
 389 if [[ -n "$pre_exec" && $PREPOSTEXEC -ne 0 ]]; then
 390         echo "Executing \"$pre_exec\" ..."
 391         if ! sh -c $pre_exec; then
 392                 ErrorMsg "Error: pre-exec command failed!"; echo
 393                 CleanUp
 394                 ErrorMsg "Aborting backup."; echo
 395                 exit 5
 396         fi
 397         sleep 2
 398         echo
 399 fi
 400
 401 for f in "${sys[@]}"; do
 402         [[ -r "$f" && -f "$f" ]] || continue
 403
 404         fname=$(basename "$f")
 405         case "$fname" in
 406                 "backup-script.conf"|*.sh)
 407                         continue
 408                         ;;
 409         esac
 410
 411         # Set global defaults
 412         system="$fname"
 413         backup_type="$default_backup_type"
 414         user="$default_user"
 415         source_root="$default_source_root"
 416         files="$default_files"
 417         target="$default_target"
 418         ssh_args_add="$default_ssh_args_add"
 419         rsync_args_add="$default_rsync_args_add"
 420         exclude_args_add="$default_exclude_args_add"
 421         exclude_dirs_add="$default_exclude_dirs_add"
 422         compress="$default_compress"
 423         ping="$default_ping"
 424         local="$default_local"
 425         generations="$default_generations"
 426         job_pre_exec="$default_job_pre_exec"
 427         job_post_exec="$default_job_post_exec"
 428         tags="$default_tags"
 429         io_timeout="$default_io_timeout"
 430
 431         # Compatibility with backup-pull(1) script: Save global values ...
 432         pre_exec_saved="$pre_exec"
 433         post_exec_saved="$post_exec"
 434
 435         # Compatibility with backup-pull(1) script: Set defaults
 436         host=""
 437         unset source
 438         unset pre_exec
 439         unset post_exec
 440
 441         # Read in system configuration file
 442         # shellcheck source=/dev/null
 443         source "$f"
 444
 445         # Compatibility with backup-pull(1) script: Fix up configuration
 446         [[ "$system" = "$fname" && -n "$host" ]] \
 447                 && system="$host"
 448         [[ "$source_root" = "$default_source_root" && -n "$source" ]] \
 449                 && source_root="$source"
 450         [[ -z "$job_pre_exec" && -n "$pre_exec" ]] \
 451                 && job_pre_exec="$pre_exec"
 452         [[ -z "$job_post_exec" && -n "$post_exec" ]] \
 453                 && job_post_exec="$post_exec"
 454
 455         # Compatibility with backup-pull(1) script: Restore global values ...
 456         pre_exec="$pre_exec_saved"
 457         post_exec="$post_exec_saved"
 458
 459         # Validate configuration
 460         if [[ "$system" = "localhost" || "$system" = "127.0.0.1" ]]; then
 461                 # Local system
 462                 local=1
 463                 compress=0
 464         fi
 465
 466         # Add "NONE" tag when no tags are given in the config file:
 467         [[ -z "$tags" ]] && tags="NONE"
 468         # Add "auto-tags":
 469         [[ "$local" -eq 1 ]] && tags="$tags,LOCAL"
 470         # Check tags
 471         if [[ -n "$TAG" && "$TAG" != "ALL" ]]; then
 472                 if ! echo "$tags" | grep -E "(^|,)$TAG(,|$)" >/dev/null 2>&1; then
 473                         if [ "$DRYRUN" -ne 0 ]; then
 474                                 echo "Tags of system \"$system\" don't match \"$TAG\": \"$tags\". Skipped."
 475                                 echo
 476                         fi
 477                         continue
 478                 fi
 479         fi
 480
 481         # Make sure "source_root" ends with a slash ("/")
 482         case "$source_root" in
 483           *"/")
 484                 ;;
 485           *)
 486                 source_root="$source_root/"
 487         esac
 488
 489         # Make sure "target" DOESN'T end with a slash ("/")
 490         case "$target" in
 491           "*/")
 492                 target=$( echo "$target" | sed -e 's/\/$//g' )
 493                 ;;
 494         esac
 495
 496         [ "$system" = "$fname" ] \
 497                 && systxt="\"$system\"" \
 498                 || systxt="\"$fname\" [\"$system\"]"
 499         [ "$local" -eq 0 ] \
 500                 && echo "Working on $systxt ..." \
 501                 || echo "Working on $systxt (local system) ..."
 502
 503         count_all=$count_all+1
 504
 505         # Check if job is disabled
 506         if [ "$backup_type" = "disabled" ]; then
 507                 echo "Job is DISABLED and will be skipped."
 508                 echo; continue
 509         fi
 510
 511         count_enabled=$count_enabled+1
 512
 513         # Check target directory
 514         if [ -z "$target" ]; then
 515                 ErrorMsg "No target directory specified for \"$system\"!? Skipped!"
 516                 echo; continue
 517         fi
 518         if [ ! -d "$target" ]; then
 519                 ErrorMsg "Target \"$target\" is not a directory!? \"$system\" skipped!"
 520                 echo; continue
 521         fi
 522
 523         sys_target="$target/$fname"
 524         sys_root="$sys_target"
 525         if [[ "$DRYRUN" -eq 0 && ! -e "$sys_target" ]]; then
 526                 if [ $generations -gt 0 ]; then
 527                         CreateSubvolume "$sys_target"; r=$?
 528                 else
 529                         mkdir -p "$sys_target"; r=$?
 530                 fi
 531                 if [ $r -ne 0 ]; then
 532                         ErrorMsg "Can't create \"$sys_target\"!? \"$system\" skipped!"
 533                         echo; continue
 534                 fi
 535         fi
 536
 537         if [[ "$local" -eq 0 && "$ping" -ne 0 ]]; then
 538                 # Check if system is alive
 539                 if ! ping -c 1 "$system" >/dev/null 2>&1; then
 540                         ErrorMsg "Host \"$system\" seems not to be alive!? Skipped."
 541                         echo; continue
 542                 fi
 543                 echo "OK, host \"$system\" seems to be alive."
 544         fi
 545
 546         if [ $generations -gt 0 ]; then
 547                 # Make sure no old backup is stored in system directory
 548                 if [ -e "$sys_target/.stamp" ]; then
 549                         # There seems to be a genearation-less backup in the
 550                         # target directory!
 551                         ErrorMsg "Target directory \"$sys_target\" seems to be unclean!? \"$system\" skipped!"
 552                         echo; continue
 553                 fi
 554
 555                 Initialize_Last_SysTarget_Snapshot "$sys_target" || continue
 556
 557                 if [[ -n "$last" && ! -e "$last/.stamp" ]]; then
 558                         # Old backup directory without "stamp file", continue
 559                         echo "Found incomplete snapshot in \"$last\", reusing and renaming it ..."
 560                         if [ "$DRYRUN" -eq 0 ]; then
 561                                 if ! RenameSubvolume "$last" "$sys_target"; then
 562                                         ErrorMsg "Failed to rename last snapshot \"$last\" to \"$sys_target\"!? \"$system\" skipped!"
 563                                         echo; continue
 564                                 fi
 565                         else
 566                                 echo " *** Trial run, not renaming snapshot \"$last\" to \"$sys_target\"!"
 567                         fi
 568                 elif [ -n "$last" ]; then
 569                         # Old backup directory found, create new snapshot
 570                         echo "Found last snapshot in \"$last\"."
 571                         if [ "$DRYRUN" -eq 0 ]; then
 572                                 CloneSubvolume "$last" "$sys_target" "$snapshot"; r=$?
 573                                 if [ $r -ne 0 ]; then
 574                                         ErrorMsg "Can't create snapshot \"$snapshot\" of \"$last\", code $r!? \"$system\" skipped!"
 575                                         echo; continue
 576                                 fi
 577                                 echo "Created new snapshot in \"$snapshot\"."
 578                         else
 579                                 echo " *** Trial run, not creating new snapshot in \"$snapshot\"!"
 580                         fi
 581                 else
 582                         # No old backup found, create new subvolume
 583                         if [ "$DRYRUN" -eq 0 ]; then
 584                                 CreateSubvolume "$sys_target"; r=$?
 585                                 if [ $r -ne 0 ]; then
 586                                         ErrorMsg "Can't create subvolume \"$sys_target\", code $r!? \"$system\" skipped!"
 587                                         echo; continue
 588                                 fi
 589                                 echo "Created new subvolume in \"$sys_target\"."
 590                         else
 591                                 echo " *** Trial run, not creating new subvolume \"$sys_target\"!"
 592                         fi
 593                 fi
 594         fi
 595
 596         ssh_cmd="ssh"
 597         [ -n "$ssh_args_add" ] && ssh_cmd="$ssh_cmd $ssh_args_add"
 598
 599         # execute job "pre-exec" command, if any
 600         if [ -n "$job_pre_exec" ]; then
 601                 ExecJob pre "$job_pre_exec" ; ret=$?
 602                 if [ $ret -ne 0 ]; then
 603                         [ $ret -ne 99 ] && count_started=$count_started+1
 604                         ErrorMsg "Pre-exec command failed, \"$system\" skipped!"
 605                         echo; continue
 606                 fi
 607         fi
 608
 609         # prepare (remote) command ...
 610         if [[ "$backup_type" == "rsync" ]]; then
 611                 cmd="$rsync --archive --timeout=$io_timeout"
 612                 [ "$compress" -ne 0 ] && cmd="$cmd --compress"
 613                 [ "$local" -eq 0 ] && cmd="$cmd --rsh=\"$ssh_cmd\""
 614                 cmd="$cmd --delete-during --delete-excluded --sparse"
 615                 if [ "$VERBOSE" -gt 0 ]; then
 616                         [ "$rsync_proto" -ge 31 ] \
 617                                 && cmd="$cmd --info=progress2" \
 618                                 || cmd="$cmd --progress"
 619                 fi
 620                 set -f
 621                 if [ "$source_root" = "$default_source_root" ]; then
 622                         for dir in \
 623                                 "/dev/**" \
 624                                 "/media/**" \
 625                                 "/mnt/**" \
 626                                 "/net/**" \
 627                                 "/proc/**" \
 628                                 "/run/**" \
 629                                 "/sys/**" \
 630                                 "/tmp/**" \
 631                                 "/var/cache/apt/**" \
 632                                 "/var/log/**" \
 633                                 "/var/tmp/**" \
 634                         ; do
 635                                 cmd="$cmd --exclude=$dir"
 636                         done
 637                 fi
 638                 [ -n "$exclude_args_add" ] && cmd="$cmd $exclude_args_add"
 639                 for dir in $exclude_dirs_add; do
 640                         cmd="$cmd --exclude=$dir"
 641                 done
 642                 [ -n "$rsync_args_add" ] && cmd="$cmd $rsync_args_add"
 643                 set +f
 644
 645                 [ "$local" -eq 0 ] \
 646                         && cmd="$cmd ${user}@${system}:$source_root $sys_target/" \
 647                         || cmd="$cmd $source_root $sys_target/"
 648         elif [[ "$backup_type" == "scp" ]]; then
 649                 cmd="scp"
 650                 [ "$VERBOSE" -eq 0 ] && cmd="$cmd -q"
 651                 for file in $files; do
 652                         cmd="$cmd ${user}@${system}:$file $sys_target/"
 653                 done
 654         else
 655                 ErrorMsg "Backup type \"$backup_type\" undefined, \"$system\" skipped!"
 656                 echo; continue
 657         fi
 658
 659         echo "Backing up to \"$sys_target\" ..."
 660         echo "Start date: $(date)"
 661         echo "$cmd"
 662         count_started=$count_started+1
 663         ok=0
 664
 665         if [ "$DRYRUN" -eq 0 ]; then
 666                 stamp_file="$sys_target/.stamp"
 667                 rm -f "$stamp_file"
 668
 669                 # Execute backup command:
 670                 start_t=$(date "+%s")
 671                 $SHELL -c "$cmd"; ret=$?
 672                 end_t=$(date "+%s")
 673
 674                 {
 675                         echo "code=$ret"
 676                         echo "start_t=$start_t"
 677                         echo "end_t=$end_t"
 678                         echo "cmd='$cmd'"
 679                         echo "backup_host='$(hostname -f)'"
 680                         echo "backup_user='$(id -un)'"
 681                 } >"$stamp_file"
 682         else
 683                 echo " *** Trial run, not executing save command!"
 684                 ret=0
 685         fi
 686
 687         if [ $ret -eq 20 ]; then
 688                 ErrorMsg "Backup of \"$system\" interrupted. Aborting ..."
 689                 GotSignal
 690         fi
 691
 692         echo "End date: $(date)"
 693         if [[ $ret -eq 0 || $ret -eq 24 ]]; then
 694                 [ $ret -eq 24 ] && count_ok_vanished=$count_ok_vanished+1
 695
 696                 echo "System \"$system\" completed with status $ret, OK."
 697                 [ "$DRYRUN" -gt 0 ] || count_ok=$count_ok+1
 698                 ok=1
 699         else
 700                 ErrorMsg "System \"$system\" completed with ERRORS, code $ret!"
 701         fi
 702
 703         # execute job "post-exec" command, if any
 704         if [ -n "$job_post_exec" ]; then
 705                 ExecJob post "$job_post_exec"
 706         fi
 707
 708         if [ $generations -gt 0 ]; then
 709                 # Update "latest" symlink
 710                 if [ "$DRYRUN" -eq 0 ]; then
 711                         rm -f "$sys_root/latest"
 712                         ln -s "$sys_target" "$sys_root/latest"
 713                 fi
 714                 # Clean up old generations
 715                 declare -i gen_count=$generations+2
 716                 # shellcheck disable=SC2012
 717                 to_delete=$(ls -1t "$sys_root" 2>/dev/null | tail -n+$gen_count | sort)
 718                 if [[ -n "$to_delete" && $ok -eq 1 ]]; then
 719                         [ "$DRYRUN" -eq 0 ] \
 720                                 && echo "Deleting old backup generations (keep $generations) ..." \
 721                                 || echo " *** Trial run, not deleting old generations:"
 722                         for delete in $to_delete; do
 723                                 dir="$sys_root/$delete"
 724                                 if [ ! -e "$dir/.stamp" ]; then
 725                                         ErrorMsg "Not deleting \"$dir\" of \"$system\", not a backup directory!?"
 726                                         continue
 727                                 fi
 728                                 last=$(stat "$dir/.stamp" 2>/dev/null | grep "^Modify: " \
 729                                  | cut -d':' -f2- | cut -d. -f1)
 730                                 # shellcheck disable=SC2086
 731                                 echo "Removing backup from" $last "..."
 732                                 if [ "$DRYRUN" -eq 0 ]; then
 733                                         DeleteSubvolume "$dir" \
 734                                                 || ErrorMsg "Failed to delete \"$dir\" of \"$system\"!"
 735                                 fi
 736                         done
 737                         echo "Clean up finished: $(date)"
 738                 elif [ -n "$to_delete" ]; then
 739                         ErrorMsg "There have been errors for \"$system\", not cleaning up old generations!"
 740                 else
 741                         echo "Nothing to clean up (keep up to $generations generations)."
 742                 fi
 743         fi
 744
 745         destinations="$destinations $target"
 746         echo
 747 done
 748
 749 sync
 750
 751 if [ "$DRYRUN" -eq 0 ]; then
 752         paths=""
 753         paths_zfs=""
 754         # shellcheck disable=SC2086
 755         for dest in $(echo $destinations | sed -e 's/ /\n/g' | sort | uniq); do
 756                 fs=$(GetFS "$dest")
 757                 case $fs in
 758                   "zfs" )
 759                         paths_zfs="$paths_zfs $dest"
 760                         ;;
 761                   *)
 762                         paths="$paths $dest"
 763                 esac
 764         done
 765         if [ -n "$paths" ]; then
 766                 # shellcheck disable=SC2086
 767                 df -h $paths
 768                 echo
 769         fi
 770         if [ -n "$paths_zfs" ]; then
 771                 # shellcheck disable=SC2086
 772                 zfs list $paths_zfs
 773                 echo
 774         fi
 775 fi
 776
 777 CleanUp
 778
 779 echo "Done: $(date)"
 780 echo
 781 [ $count_all -eq 1 ] && s="" || s="s"
 782 [ $count_enabled -eq $count_all ] \
 783         && echo " - $count_all job$s defined (all enabled)," \
 784         || echo " - $count_all job$s defined ($count_enabled enabled),"
 785 [ $count_started -eq 1 ] && s="" || s="s"
 786 echo " - $count_started job$s started,"
 787 echo " - $count_ok done without errors."
 788 echo
 789
 790 if [ $count_started -ne $count_ok ]; then
 791         echo "----->  THERE HAVE BEEN ERRORS!  <-----"
 792         echo
 793         exit 6
 794 elif [ $count_enabled -ne $count_started ]; then
 795         exit 7
 796 fi
 797
 798 # -eof-