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Mercurial > hg > plan9front / sys/lib/backup/restore

changeset 7415: 489439903f0d
parent: 3ccda4f00502
author: Roberto E. Vargas Caballero <k0ga@shike2.com>
date: Sun, 13 Oct 2019 10:20:10 +0200
permissions: -rwxr-xr-x
description: backup: Set execution bits in backup scripts
1 #!/bin/rc
2 # restore arena# [dev] - load venti with arenas on dev, stored one per track
3 # starting with arena#. must have run fmtarenas before restoring
4 # the first arena in the partition.
5 # this must be run on the venti server, without venti running on the
6 # affected arena partition(s).
7 rfork ne
8 if (test -e /sys/lib/backup/funcs)
9  . /sys/lib/backup/funcs
10 switch ($#*) {
11 case 1
12 case 2
13  rdev=$2
14 case *
15  echo usage: $0 arena-num '[dev]' >[1=2]
16  exit usage
17 }
18 starena=$1
19 if (! ~ $starena [0-9] [0-9][0-9] [0-9][0-9][0-9]) {
20  echo $0: bad starting arena: $starena >[1=2]
21  exit bad-arena-num
22 }
23 
24 # clear any dregs from a previous run
25 unmount /mnt/cd >[2]/dev/null
26 sleep 1
27 kill cdfs | rc
28 sleep 1
29 cdfs -d $rdev || exit
30 cd /mnt/cd
31 
32 #for (track in d[0-9]*)
33 # venti/wrarena $track # slow; takes about 12½ mins. per GB
34 
35 arena = $starena
36 # set arenabase for arenastart
37 arenabase = `{ venti/printarenapart $arenas | sed -e 's/.*arenabase=//' -e 1q }
38 kill printarenapart | rc # printarenapart leaves a process behind
39 # echo arenabase $arenabase
40 
41 skipping=yes
42 for (track in d[0-9]*) {
43  if (~ track 'd[0-9]*') {
44  echo $0: no tracks in /mnt/cd >[1=2]
45  exit no-tracks
46  }
47  if (~ $skipping yes) {
48  # verify that first track is the expected one
49  type=`{file $track}
50  switch ($"type) {
51  case *': venti arena'
52  name=`{ venti/printarena $track >[2=1] |
53  sed -e 's/.*name=([^ =]+).*/\1/' -e 1q }
54  case *
55  name=NOT-A-VENTI-ARENA
56  }
57  kill printarena | rc # printarena leaves a process behind
58 
59  echo -n first track is $"name'; is that right? '
60  switch (`{read}) {
61  case [yY]*
62  skipping=no
63  case skip
64  skipping=yes
65  case *
66  echo aborting, arena is unchanged. >[1=2]
67  exit 'wrong track'
68  }
69  }
70 
71  if (! ~ $skipping yes) {
72  # copy each track into its slot in the arena partition
73  venti/printarena $track >[2=1] | sed 1q | tr -d '\12'
74  kill printarena | rc # printarena leaves a process behind
75 
76  off = `{arenastart $arena}
77  # echo -n writing $track to $arenas at 8K-block offset $off:
78  sleep 3
79  echo
80  # argh! something (cdfs?) appends 60K of *stuff* to each
81  # arena on optical disc. restrain dd.
82  count=`{ echo $arenasize/$blocksize | bc }
83  pump -i 1048576 -o 65536 -d 10 <$track |
84  dd -quiet 1 -count $count -bs $blocksize -of $arenas \
85  -oseek $off
86  arena = `{hoc -e $arena+1}
87  }
88 }
89 # when all done, must run venti/checkarenas, fmtisect, fmtbloom, fmtindex,
90 # and (the big one) venti/buildindex -b /cfg/pie/venti.conf