mdw@git.distorted.org.uk Git - rsync-backup/blob - rsync-backup.in

   1 #! @BASH@
   2 ###
   3 ### Backup script
   4 ###
   5 ### (c) 2012 Mark Wooding
   6 ###
   7
   8 ###----- Licensing notice ---------------------------------------------------
   9 ###
  10 ### This file is part of the `rsync-backup' program.
  11 ###
  12 ### rsync-backup is free software; you can redistribute it and/or modify
  13 ### it under the terms of the GNU General Public License as published by
  14 ### the Free Software Foundation; either version 2 of the License, or
  15 ### (at your option) any later version.
  16 ###
  17 ### rsync-backup is distributed in the hope that it will be useful,
  18 ### but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 ### GNU General Public License for more details.
  21 ###
  22 ### You should have received a copy of the GNU General Public License
  23 ### along with rsync-backup; if not, write to the Free Software Foundation,
  24 ### Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  25
  26 set -e
  27
  28 thishost=$(hostname -s)
  29 quis=${0##*/}
  30
  31 VERSION=@VERSION@
  32 mntbkpdir=@mntbkpdir@
  33 logdir=@logdir@
  34 fshashdir=@fshashdir@
  35 conf=@sysconfdir@/rsync-backup.conf
  36
  37 verbose=:
  38
  39 ###--------------------------------------------------------------------------
  40 ### Utility functions.
  41
  42 RSYNCOPTS="--verbose"
  43
  44 do_rsync () {
  45   ## Run rsync(1) in an appropriate manner.  Configuration should ovrride
  46   ## this or set $RSYNCOPTS if it wants to do something weirder.  Arguments
  47   ## to this function are passed on to rsync.
  48
  49   rsync \
  50         --archive --hard-links --numeric-ids --del \
  51         --sparse --compress \
  52         --one-file-system \
  53         --partial \
  54         $RSYNCOPTS \
  55         --filter="dir-merge .rsync-backup" \
  56         "$@"
  57 }
  58
  59 log () {
  60   now=$(date +"%Y-%m-%d %H:%M:%S %z")
  61   echo >&9 "$now $*"
  62 }
  63
  64 run () {
  65   tag=$1 cmd=$2; shift 2
  66   ## Run CMD, logging its output in a pleasing manner.
  67
  68   log "BEGIN $tag"
  69   rc=$(
  70     { { { ( set +e
  71             "$cmd" "$@" 3>&- 4>&- 5>&- 9>&-
  72             echo $? >&5; ) |
  73           while IFS= read line; do echo "| $line"; done >&4; } 2>&1 |
  74         while IFS= read line; do echo "* $line"; done >&4; } 4>&1 |
  75       cat >&9; } 5>&1 </dev/null
  76   )
  77   case $rc in
  78     0) log "END $tag" ;;
  79     *) log "FAIL $tag (rc = $rc)" ;;
  80   esac
  81   return $rc
  82 }
  83
  84 localp () {
  85   h=$1
  86   ## Answer whether H is a local host.
  87
  88   case $h in
  89     "$thishost") return 0 ;;
  90     *) return 1 ;;
  91   esac
  92 }
  93
  94 hostrun () {
  95   tag=$1 cmd=$2
  96   ## Run CMD on the current host.  If the host seems local then run the
  97   ## command through a local shell; otherwise run it through ssh(1).  Either
  98   ## way it will be processed by a shell.
  99
 100   if localp $host; then run "@$host: $tag" sh -c "$cmd"
 101   else run "@$host: $tag" ssh $host "$cmd"
 102   fi
 103 }
 104
 105 _hostrun () {
 106   h=$1 cmd=$2
 107   ## Like hostrun, but without the complicated logging, but targetted at a
 108   ## specific host.
 109
 110   if localp $h; then sh -c "$cmd"
 111   else ssh $h "$cmd"
 112   fi
 113 }
 114
 115 hostpath () {
 116   path=$1
 117   ## Output (to stdout) either PATH or HOST:PATH, choosing the former if the
 118   ## current host is local.
 119
 120   if localp $host; then echo $path
 121   else echo $host:$path
 122   fi
 123 }
 124
 125 ###--------------------------------------------------------------------------
 126 ### Snapshot handling.
 127
 128 ## Snapshot protocol.  Each snapshot type has a pair of functions snap_TYPE
 129 ## and unsnap_TYPE.  Each is given the current snapshot arguments and the
 130 ## filesystem name to back up.  The snap_TYPE function should create and
 131 ## mount the snapshot and output an rsync(1) path to where the filesystem can
 132 ## be copied; the unsnap_TYPE function should unmount and tear down the
 133 ## snapshot.
 134
 135 ## Fake snapshot by not doing anything.  Use only if you have no choice.
 136 snap_live () { hostpath "$2"; }
 137 unsnap_live () { :; }
 138
 139 ## Fake snapshot by remounting a live filesystem read-only.  Useful if the
 140 ## underlying storage isn't in LVM.
 141
 142 snap_ro () {
 143   fs=$1 mnt=$2
 144
 145   ## Place a marker in the filesystem so we know why it was made readonly.
 146   ## (Also this serves to ensure that the filesystem was writable before.)
 147   hostrun "snap-ro $mnt" "
 148         echo rsync-backup >$mnt/.lock
 149         mount -oremount,ro $mnt" || return $?
 150
 151   ## Done.
 152   hostpath $mnt
 153 }
 154
 155 unsnap_ro () {
 156   fs=$1 mnt=$2
 157
 158   ## Check that the filesystem still has our lock marker.
 159   hostrun "unsnap-ro $mnt" "
 160         case \$(cat $mnt/.lock) in
 161           rsync-backup) ;;
 162           *) echo unlocked by someone else; exit 31 ;;
 163         esac
 164         mount -oremount,rw $mnt
 165         rm $mnt/.lock" || return $?
 166 }
 167
 168 ## Snapshot using LVM.
 169
 170 SNAPSIZE="-l10%ORIGIN"
 171 SNAPDIR=@mntbkpdir@/snap
 172
 173 snap_lvm () {
 174   vg=$1 lv=$2
 175
 176   ## Make the snapshot.
 177   hostrun "snap-lvm $vg/$lv" "
 178         lvcreate --snapshot -n$lv.bkp $SNAPSIZE $vg/$lv
 179         mkdir -p $SNAPDIR/$lv
 180         mount -oro /dev/$vg/$lv.bkp $SNAPDIR/$lv" || return $?
 181
 182   ## Done.
 183   hostpath $SNAPDIR/$lv
 184 }
 185
 186 unsnap_lvm () {
 187   vg=$1 lv=$2
 188
 189   ## Remove the snapshot.  Sometimes LVM doesn't notice that the snapshot is
 190   ## no longer in open immdiately, so try several times.
 191   hostrun "unsnap-lvm $vg/$lv" "
 192         umount $SNAPDIR/$lv
 193         rc=1
 194         for i in 1 2 3 4; do
 195           if lvremove -f $vg/$lv.bkp; then rc=0; break; fi
 196           sleep 2
 197         done
 198         exit $rc" || return $?
 199 }
 200
 201 ## Complicated snapshot using LVM, where the volume group and filesystem are
 202 ## owned by different machines, so they need to be synchronized during the
 203 ## snapshot.
 204
 205 do_rfreezefs () {
 206   lvhost=$1 vg=$2 lv=$3 fshost=$4 fsdir=$5
 207
 208   ## Engage in the rfreezefs protocol with the filesystem host.  This
 209   ## involves some hairy plumbing.  We want to get exit statuses out of both
 210   ## halves.
 211   set +e
 212   ssh $fshost rfreezefs $fsdir | {
 213     set -e
 214
 215     ## Read the codebook from the remote end.
 216     ready=nil
 217     while read line; do
 218       set -- $line
 219       case "$1" in
 220         PORT) port=$2 ;;
 221         TOKEN) eval tok_$2=$3 ;;
 222         READY) ready=t; break ;;
 223         *)
 224           echo >&2 "$quis: unexpected keyword $1 (rfreezefs to $rhost)"
 225           exit 1
 226           ;;
 227       esac
 228     done
 229     case $ready in
 230       nil)
 231         echo >&2 "$quis: unexpected eof (rfreezefs to $rhost)"
 232         exit 1
 233         ;;
 234     esac
 235
 236     ## Connect to the filesystem host's TCP port and get it to freeze its
 237     ## filesystem.
 238     exec 3<>/dev/tcp/$fshost/$port
 239     echo $tok_FREEZE >&3
 240     read tok <&3
 241     case $tok in
 242       "$tok_FROZEN") ;;
 243       *)
 244         echo >&2 "$quis: unexpected token $tok (rfreezefs $fsdir on $fshost)"
 245         exit 1
 246         ;;
 247     esac
 248
 249     ## Get the volume host to create the snapshot.
 250     set +e
 251     _hostrun >&2 3>&- $lvhost \
 252       "lvcreate --snapshot -n$lv.bkp $SNAPSIZE $vg/$lv"
 253     snaprc=$?
 254     set -e
 255
 256     ## The filesystem can thaw now.
 257     echo $tok_THAW >&3
 258     read tok <&3
 259     case $tok in
 260       "$tok_THAWED") ;;
 261       *)
 262         _hostrun >&2 3>&- $lvhost "lvremove -f $vg/$lv.bkp" || :
 263         echo >&2 "$quis: unexpected token $tok (rfreezefs $fsdir on $fshost)"
 264         exit 1
 265         ;;
 266     esac
 267
 268     ## Done.
 269     exit $snaprc
 270   }
 271
 272   ## Sift through the wreckage to find out what happened.
 273   rc_rfreezefs=${PIPESTATUS[0]} rc_snapshot=${PIPESTATUS[1]}
 274   set -e
 275   case $rc_rfreezefs:$rc_snapshot in
 276     0:0)
 277       ;;
 278     112:*)
 279       echo >&2 "$quis: EMERGENCY failed to thaw $fsdir on $fshost!"
 280       exit 112
 281       ;;
 282     *)
 283       echo >&2 "$quis: failed to snapshot $vg/$lv ($fsdir on $fshost)"
 284       exit 1
 285       ;;
 286   esac
 287
 288   ## Mount the snapshot on the volume host.
 289   _hostrun >&2 $lvhost "
 290         mkdir -p $SNAPDIR/$lv
 291         mount -oro /dev/$vg/$lv.bkp $SNAPDIR/$lv"
 292 }
 293
 294 snap_rfreezefs () {
 295   rhost=$1 vg=$2 lv=$3 rfs=$4
 296
 297   set -e
 298   run "snap-rfreezefs $host:$vg/$lv $rhost:$rfs" \
 299     do_rfreezefs $host $vg $lv $rhost $rfs || return $?
 300   hostpath $SNAPDIR/$lv
 301 }
 302
 303 unsnap_rfreezefs () {
 304
 305   ## Unshapping is the same as for plain LVM.
 306   rhost=$1 vg=$2 lv=$3 rfs=$4
 307   unsnap_lvm $vg $lv
 308 }
 309
 310 ###--------------------------------------------------------------------------
 311 ### Expiry computations.
 312
 313 parsedate () {
 314   date=$1
 315   ## Parse an ISO8601 DATE, and set YEAR, MONTH, DAY appropriately (and
 316   ## without leading zeros).
 317
 318   ## Extract the components of the date and trim leading zeros (which will
 319   ## cause things to be interpreted as octal and fail).
 320   year=${date%%-*} rest=${date#*-}; month=${rest%%-*} day=${rest#*-}
 321   year=${year#0} month=${month#0} day=${day#0}
 322 }
 323
 324 julian () {
 325   date=$1
 326   ## Convert an ISO8601 DATE to a Julian Day Number.
 327
 328   parsedate $date
 329
 330   ## The actual calculation: convert a (proleptic) Gregorian calendar date
 331   ## into a Julian day number.  This is taken from Wikipedia's page
 332   ## http://en.wikipedia.org/wiki/Julian_day#Calculation but the commentary
 333   ## is mine.  The epoch is 4713BC-01-01 (proleptic) Julian, or 4714BC-11-24
 334   ## proleptic Gregorian.
 335
 336   ## If the MONTH is January or February then set a = 1, otherwise set a = 0.
 337   a=$(( (14 - $month)/12 ))
 338
 339   ## Compute a year offset relative to 4799BC-03-01.  This puts the leap day
 340   ## as the very last day in a year, which is very convenient.  The offset
 341   ## here is sufficient to make all y values positive (within the range of
 342   ## the JDN calendar), and is a multiple of 400, which is the Gregorian
 343   ## cycle length.
 344   y=$(( $year + 4800 - $a ))
 345
 346   ## Compute the offset month number in that year.  These months count from
 347   ## zero, not one.
 348   m=$(( $month + 12*$a - 3 ))
 349
 350   ## Now for the main event.  The (153 m + 2)/5 term is a surprising but
 351   ## correct trick for obtaining the number of days in the first m months of
 352   ## the (shifted) year).  The magic offset 32045 is what you get when you
 353   ## plug the proper JDN epoch (year = -4713, month = 11, day = 24) into the
 354   ## above machinery.
 355   jdn=$(( $day + (153*$m + 2)/5 + 365*$y + $y/4 - $y/100 + $y/400 - 32045 ))
 356
 357   echo $jdn
 358 }
 359
 360 expire () {
 361   ## Read dates on stdin; write to stdout `EXPIRE date' for dates which
 362   ## should be expired and `RETAIN date' for dates which should be retained.
 363
 364   ## Get the current date and convert it into useful forms.
 365   now=$(date +%Y-%m-%d)
 366   parsedate $now
 367   now_jdn=$(julian $now) now_year=$year now_month=$month now_day=$day
 368   kept=:
 369
 370   ## Work through each date in the input.
 371   while read date; do
 372     keep=nil
 373
 374     ## Convert the date into a useful form.
 375     jdn=$(julian $date)
 376     parsedate $date
 377
 378     ## Work through the policy list.
 379     if [ $jdn -le $now_jdn ]; then
 380       while read ival age; do
 381
 382         ## Decide whether the policy entry applies to this date.
 383         apply=nil
 384         case $age in
 385           forever)
 386             apply=t
 387             ;;
 388           year)
 389             if [ $year -eq $now_year ] ||
 390                ([ $year -eq $(( $now_year - 1 )) ] &&
 391                 [ $month -ge $now_month ])
 392             then apply=t; fi
 393             ;;
 394           month)
 395             if ([ $month -eq $now_month ] && [ $year -eq $now_year ]) ||
 396                ((([ $month -eq $(( $now_month - 1 )) ] &&
 397                   [ $year -eq $now_year ]) ||
 398                  ([ $month -eq 12 ] && [ $now_month -eq 1 ] &&
 399                   [ $year -eq $(( $now_year - 1 )) ])) &&
 400                 [ $day -ge $now_day ])
 401             then apply=t; fi
 402             ;;
 403           week)
 404             if [ $jdn -ge $(( $now_jdn - 7 )) ]; then apply=t; fi
 405             ;;
 406           *)
 407             echo >&2 "$quis: unknown age symbol \`$age'"
 408             exit 1
 409             ;;
 410         esac
 411         case $apply in nil) continue ;; esac
 412
 413         ## Find the interval marker for this date.
 414         case $ival in
 415           daily)
 416             marker=$date
 417             ;;
 418           weekly)
 419             ydn=$(julian $year-01-01)
 420             wk=$(( ($jdn - $ydn)/7 + 1 ))
 421             marker=$year-w$wk
 422             ;;
 423           monthly)
 424             marker=$year-$month
 425             ;;
 426           annually | yearly)
 427             marker=$year
 428             ;;
 429           *)
 430             echo >&2 "$quis: unknown interval symbol \`$ival'"
 431             exit 1
 432             ;;
 433         esac
 434
 435         ## See if we've alredy retained something in this interval.
 436         case $kept in
 437           *:"$marker":*) ;;
 438           *) keep=t kept=$kept$marker: ;;
 439         esac
 440
 441       done <<EOF
 442 $expire_policy
 443 EOF
 444     fi
 445
 446     case $keep in
 447       t) echo RETAIN $date ;;
 448       *) echo EXPIRE $date ;;
 449     esac
 450
 451   done
 452 }
 453
 454 ###--------------------------------------------------------------------------
 455 ### Actually taking backups of filesystems.
 456
 457 STOREDIR=@mntbkpdir@/store
 458 MAXLOG=14
 459 HASH=sha256
 460
 461 bkprc=0
 462
 463 remote_fshash () {
 464   _hostrun $host "
 465         umask 077
 466         mkdir -p $fshashdir
 467         cd ${snapmnt#*:}
 468         echo \"*** $host $fs $date\"; echo
 469         rsync -rx --filter='dir-merge .rsync-backup' ./ |
 470           fshash -c$fshashdir/$fs.bkp -a -H$HASH -frsync
 471   " >new.fshash
 472 }
 473
 474 local_fshash () {
 475   { echo "*** $host $fs $date"; echo
 476     fshash -c$STOREDIR/fshash.cache -H$HASH new/
 477   } >$localmap
 478 }
 479
 480 expire_backups () {
 481   { seen=:
 482     for i in *-*-*; do
 483       i=${i%%.*}
 484       case $i in *[!-0-9]*) continue ;; esac
 485       case $seen in *:"$i":*) continue ;; esac
 486       seen=$seen$i:
 487       echo $i
 488     done; } |
 489   expire |
 490   while read op date; do
 491     case $op in
 492       RETAIN)
 493         echo "keep   $date"
 494         ;;
 495       EXPIRE)
 496         echo "delete $date"
 497         $verbose -n "   expire $date..."
 498         rm -rf $date $date.*
 499         $verbose " done"
 500         ;;
 501     esac
 502   done
 503 }
 504
 505 backup_precommit_hook () {
 506   host=$1 fs=$2 date=$3
 507   ## Override this hook in the configuration file for special effects.
 508
 509   :
 510 }
 511
 512 backup_commit_hook () {
 513   host=$1 fs=$2 date=$3
 514   ## Override this hook in the configuration file for special effects.
 515
 516   :
 517 }
 518
 519 do_backup () {
 520   date=$1 fs=$2 fsarg=$3
 521   ## Back up FS on the current host.
 522
 523   set -e
 524
 525   ## Report the start of this attempt.
 526   log "START BACKUP of $host:$fs"
 527
 528   ## Create and mount the remote snapshot.
 529   snapmnt=$(snap_$snap $snapargs $fs $fsarg) || return $?
 530   $verbose "    create snapshot"
 531
 532   ## Build the list of hardlink sources.
 533   linkdests=""
 534   for i in $host $like; do
 535     d=$STOREDIR/$i/$fs/last/
 536     if [ -d $d ]; then linkdests="$linkdests --link-dest=$d"; fi
 537   done
 538
 539   ## Copy files from the remote snapshot.
 540   mkdir -p new/
 541   $verbose -n " running rsync..."
 542   set +e
 543   run "RSYNC of $host:$fs (snapshot on $snapmnt)" do_rsync \
 544     $linkdests \
 545     $rsyncargs \
 546     $snapmnt/ new/
 547   rc_rsync=$?
 548   set -e
 549   $verbose " done"
 550
 551   ## Collect a map of the snapshot for verification purposes.
 552   set +e
 553   $verbose -n " remote fshash..."
 554   run "@$host: fshash $fs" remote_fshash
 555   rc_fshash=$?
 556   set -e
 557   $verbose " done"
 558
 559   ## Remove the snapshot.
 560   unsnap_$snap $snapargs $fs $fsarg
 561   $verbose "    remove snapshot"
 562
 563   ## If we failed to copy, then give up.
 564   case $rc_rsync:$rc_fshash in
 565     0:0) ;;
 566     0:*) return $rc_fshash ;;
 567     *) return $rc_rsync ;;
 568   esac
 569
 570   ## Get a matching map of the files received.
 571   mkdir -m750 -p $STOREDIR/tmp
 572   localmap=$STOREDIR/tmp/fshash.$host.$fs.$date
 573   $verbose -n " local fshash..."
 574   run "local fshash $host:$fs" local_fshash || return $?
 575   $verbose " done"
 576
 577   ## Compare the two maps.
 578   run "compare fshash maps for $host:$fs" \
 579     diff -u new.fshash $localmap || return $?
 580   rm -f $localmap
 581   $verbose "    fshash match"
 582
 583   ## Commit this backup.
 584   backup_precommit_hook $host $fs $date
 585   mv new $date
 586   mv new.fshash $date.fshash
 587   backup_commit_hook $host $fs $date
 588   mkdir hack
 589   ln -s $date hack/last
 590   mv hack/last .
 591   rmdir hack
 592   $verbose "    commit"
 593
 594   ## Expire old backups.
 595   case "${expire_policy+t}" in
 596     t) run "expiry for $host:$fs" expire_backups ;;
 597   esac
 598
 599   ## Report success.
 600   log "SUCCESSFUL BACKUP of $host:$fs"
 601 }
 602
 603 backup () {
 604   ## backup FS[:ARG] ...
 605   ##
 606   ## Back up the filesystems on the currently selected host using the
 607   ## currently selected snapshot type.
 608
 609   for fs in "$@"; do
 610
 611     ## Parse the argument.
 612     case $fs in
 613       *:*) fsarg=${fs#*:} fs=${fs%%:*} ;;
 614       *) fsarg="" ;;
 615     esac
 616     $verbose "  filesystem $fs"
 617
 618     ## Move to the store directory and set up somewhere to put this backup.
 619     cd $STOREDIR
 620     if [ ! -d $host ]; then
 621       mkdir -m755 $host
 622       chown root:root $host
 623     fi
 624     if [ ! -d $host/$fs ]; then
 625       mkdir -m750 $host/$fs
 626       chown root:backup $host/$fs
 627     fi
 628     cd $host/$fs
 629
 630     ## Find out if we've already copied this filesystem today.
 631     date=$(date +%Y-%m-%d)
 632     if [ -d $date ]; then
 633       $verbose "        already dumped"
 634       continue
 635     fi
 636
 637     ## Find a name for the log file.  In unusual circumstances, we may have
 638     ## deleted old logs from today, so just checking for an unused sequence
 639     ## number is insufficient.  Instead, check all of the logfiles for today,
 640     ## and use a sequence number that's larger than any of them.
 641     seq=1
 642     for i in "$logdir/$host/$fs.$date#"*; do
 643       tail=${i##*#}
 644       case "$tail" in [!1-9]* | *[!0-9]*) continue ;; esac
 645       if [ -f "$i" -a $tail -ge $seq ]; then seq=$(( tail + 1 )); fi
 646     done
 647     log="$logdir/$host/$fs.$date#$seq"
 648
 649     ## Do the backup of this filesystem.
 650     mkdir -p $logdir/$host
 651     if ! do_backup $date $fs $fsarg 9>$log 1>&9; then
 652       echo >&2
 653       echo >&2 "$quis: backup of $host:$fs FAILED!"
 654       bkprc=1
 655     fi
 656
 657     ## Count up the logfiles.
 658     nlog=0
 659     for i in "$logdir/$host/$fs".*; do
 660       if [ ! -f "$i" ]; then continue; fi
 661       nlog=$(( nlog + 1 ))
 662     done
 663
 664     ## If there are too many, go through and delete some early ones.
 665     if [ $nlog -gt $MAXLOG ]; then
 666       n=$(( nlog - MAXLOG ))
 667       for i in "$logdir/$host/$fs".*; do
 668         if [ ! -f "$i" ]; then continue; fi
 669         rm -f "$i"
 670         n=$(( n - 1 ))
 671         if [ $n -eq 0 ]; then break; fi
 672       done
 673     fi
 674   done
 675 }
 676
 677 ###--------------------------------------------------------------------------
 678 ### Configuration functions.
 679
 680 host () { host=$1; like=; $verbose "host $host"; }
 681 snaptype () { snap=$1; shift; snapargs="$*"; }
 682 rsyncargs () { rsyncargs="$*"; }
 683 like () { like="$*"; }
 684
 685 retain () {
 686   expire_policy="${expire_policy+$expire_policy
 687 }$*"
 688 }
 689
 690 ###--------------------------------------------------------------------------
 691 ### Read the configuration and we're done.
 692
 693 usage () {
 694   echo "usage: $quis [-v] [-c CONF]"
 695 }
 696
 697 version () {
 698   echo "$quis version $VERSION"
 699 }
 700
 701 config () {
 702   echo
 703   cat <<EOF
 704 conf = $conf
 705 mntbkpdir = $mntbkpdir
 706 fshashdir = $fshashdir
 707 logdir = $logdir
 708 EOF
 709 }
 710
 711 whine () { echo >&8 "$@"; }
 712
 713 while getopts "hVvc:" opt; do
 714   case "$opt" in
 715     h) usage; exit 0 ;;
 716     V) version; config; exit 0 ;;
 717     v) verbose=whine ;;
 718     c) conf=$OPTARG ;;
 719     *) exit 1 ;;
 720   esac
 721 done
 722 shift $((OPTIND - 1))
 723 case $# in 0) ;; *) usage >&2; exit 1 ;; esac
 724 exec 8>&1
 725
 726 . "$conf"
 727
 728 ###----- That's all, folks --------------------------------------------------
 729
 730 exit $bkprc