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