summaryrefslogtreecommitdiff
path: root/backupStatistics.in
blob: 8de5f9c13672165e1bd1f4961d7ceecf44b5a51b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
#!/bin/bash

# backupStatistics version #VERSION#

set -e

[ -r "#ETCDIR#/backup.conf" ] && \
  . "#ETCDIR#/backup.conf"

do_stage()
{
  case $1 in
    1)
      if [ "$2" == '##DESCRIBE##' ]
      then
        echo 'generate lists $filename -> $inode'
        return 0
      fi
      dest="${backups["${backupID}"]%% *}"
      dest="${dest%/}"
      while [ ! -d "${dest}" ] && [ ${maxWait} -gt 0 ]
      do
        sleep 1
        maxWait=$[${maxWait}-1]
      done

      rm -f "${cacheDir}/${backupID}.inodes"
      for dat in $(ls "${dest}")
      do
        echo "${dat}:"
        find "${dest}/${dat}" -type f -links -64001 -printf '%i %D-%m-%U-%G %p\n' >> \
          "${cacheDir}/${backupID}.inodes"
      done
    ;;
    2)
      if [ "$2" == '##DESCRIBE##' ]
      then
        echo 'sort previous lists by $inode'
        return 0
      fi
      tmpDirA="$(mktemp -d)"
      tmpDirB="$(mktemp -d "${cacheDir}/tmp.XXXXXX")"
      sort -T "${tmpDirA}" -T "${tmpDirB}" -u "${cacheDir}/${backupID}.inodes" > \
        "${cacheDir}/${backupID}.inodes.sorted"
      rmdir "${tmpDirA}" "${tmpDirB}"
    ;;
    3)
      if [ "$2" == '##DESCRIBE##' ]
      then
        echo 'generate lists $inode -> $count, $contentHash'
        return 0
      fi
      uniq -cm2 "${cacheDir}/${backupID}.inodes.sorted" | \
        parallel \
          sha512sum {=s/^ *\([[:digit:]]\+ \)\{2\}[0-9-]\+ //=} \| \
            sed '"s|^\([0-9a-f]\{128\}\)  .*\$|\1'{=s/^ *\([[:digit:]]\+ [[:digit:]]\+\) \([0-9-]\+\) .*/-\\2 \\1/=}'|"' \
          \; > \
        "${cacheDir}/${backupID}.content"
    ;;
    4)
      if [ "$2" == '##DESCRIBE##' ]
      then
        echo 'sort previous lists by $contentHash'
        return 0
      fi
      tmpDirA="$(mktemp -d)"
      tmpDirB="$(mktemp -d "${cacheDir}/tmp.XXXXXX")"
      sort -T "${tmpDirA}" -T "${tmpDirB}" -k1,1 -k2nr,2 "${cacheDir}/${backupID}.content" > \
        "${cacheDir}/${backupID}.content.sorted"
      rmdir "${tmpDirA}" "${tmpDirB}"
    ;;
    5)
      if [ "$2" == '##DESCRIBE##' ]
      then
        echo 'generate sorted lists of groups of inodes with the same hashes'
        return 0
      fi
      index=0
      tmpDirA="$(mktemp -d)"
      tmpDirB="$(mktemp -d "${cacheDir}/tmp.XXXXXX")"
      uniq -m1 --all-repeated=separate "${cacheDir}/${backupID}.content.sorted" | \
        sed 's|^\(\S\+ \)\{2\}||' | \
        while read s
        do
          if [ -z "${s}" ]
          then
            index=$[${index}+1]
          else
            echo "${s#* } B ${index}"
          fi
        done | \
        sort -T "${tmpDirA}" -T "${tmpDirB}" > \
        "${cacheDir}/${backupID}.duplicates"
      rmdir "${tmpDirA}" "${tmpDirB}"
    ;;
    6)
      if [ "$2" == '##DESCRIBE##' ]
      then
        echo 'find files to inodes of previous lists'
        return 0
      fi
      tmpDirA="$(mktemp -d)"
      tmpDirB="$(mktemp -d "${cacheDir}/tmp.XXXXXX")"

      unset block
      unset lastBlock
      unset firstInode
      unset lastInode

      sed '
        s|^\(\S\+\) \S\+ |\1 F |
      ' "${cacheDir}/${backupID}.inodes.sorted" | \
        sort -m -T "${tmpDirA}" -T "${tmpDirB}" -- \
          - "${cacheDir}/${backupID}.duplicates" | \
        while read -r inode type extra
        do
          if [ "${type}" == "B" ]
          then
            block="${extra}"
          elif [ "${lastInode}" == "${inode}" ] && [ -n "${block}" ]
          then
            echo "${block} ${inode} ${extra}"
          else
            unset block
          fi
          lastInode="${inode}"
        done | \
        sort -T "${tmpDirA}" -T "${tmpDirB}" -k1n,1 | \
        while read -r block inode extra
        do
          if [ "${lastBlock}" != "${block}" ]
          then
            firstInode="${inode}"
          fi
          if [ "${lastBlock}" != "${block}" ] || [ "${firstInode}" != "${inode}" ]
          then
            echo "${block} ${extra}"
          fi
          lastBlock="${block}"
        done | \
        uniq -m1 --group=separate > \
        "${cacheDir}/${backupID}.duplicates.files"
      rmdir "${tmpDirA}" "${tmpDirB}"
    ;;
    7)
      if [ "$2" == '##DESCRIBE##' ]
      then
        echo 'relink files with different inodes and same hashes'
        return 0
      fi
      if [ ! -r "${cacheDir}/next.action" ]
      then
        cat "${cacheDir}/${backupID}.duplicates.files"
      elif [ "$(head -n1 "${cacheDir}/next.action")" == "${backupID}" ]
      then
        startBlock="$(tail -n1 "${cacheDir}/next.action")"
        sed "
          :vor;
            /^${startBlock} /bnach;
            d;
            bvor;
          :nach;
            n;
            bnach
        " "${cacheDir}/${backupID}.duplicates.files"
      fi | \
        while read -r oBlock original
        do
          echo "${backupID}" > "${cacheDir}/next.action2"
          echo "${oBlock}" >> "${cacheDir}/next.action2"
          mv "${cacheDir}/next.action2" "${cacheDir}/next.action"
          while read -r kBlock kopie
          do
            [ -z "${kopie}" ] && break
            if [ "${kBlock}" != "${oBlock}" ]
            then
              >&2 echo "'${kBlock}' != '${oBlock}'"
              >&2 echo "'${backupID}':"
              >&2 echo "'${original}'"
              >&2 echo "'${kopie}'"
              exit 1
            fi

            if ${paranoid}
            then
              diff "${original}" "${kopie}"
            fi
            if [ $(stat -c'%h' "${original}") -ge 65000 ]
            then
              echo "rm \"${original}\""
              echo "ln \"${kopie}\" \"${original}\""
              if ! ${dummy}
              then
                rm "${original}"
                ln "${kopie}" "${original}"
              fi
            else
              echo "rm \"${kopie}\""
              echo "ln \"${original}\" \"${kopie}\""
              if ! ${dummy}
              then
                rm "${kopie}"
                ln "${original}" "${kopie}"
              fi
            fi
          done
        done
      if [ -r "${cacheDir}/next.action" ] && \
        [ "$(head -n1 "${cacheDir}/next.action")" == "${backupID}" ]
      then
        rm -f "${cacheDir}/next.action" "${cacheDir}/next.action2"
      fi
    ;;
  esac
}

usage()
{
  >&2 echo \
'Usage:  backupStatistics [OPTION]
Search and tidy duplicate and not-hardlinked files in the backups.

With no options, tidy up all backups. THIS CAN BE VERY TIME CONSUMING.

Mandatory arguments to long options are mandatory for short options too.
  -d, --dummy         only generate lists, do not modify backupfiles
  -m, --max=maxNum    stop execution after step maxNum
  -p, --paranoid      test for file differences before relinking (test _should_ be obsolete)
  -s, --skip=skipNum  skip first skipNum steps
#HELPTEXT#           #

the executed steps are:'

  for ((stage=1; stage<=#NUMSTAGES#; stage++))
  do
    >&2 echo ''
    >&2 echo "  ${stage}. $(do_stage ${stage} '##DESCRIBE##')"
  done
  >&2 echo ''
  [ -z "$1" ] && exit 1
  exit $1
}

eval set -- "$(
  getopt -o dm:ps: \
    --long dummy \
    --long help \
    --long max: \
    --long paranoid \
    --long skip: \
    --long version \
    -n "$(basename "$0")" -- "$@" || \
  echo usage
)"

dummy=false
maxNum=#NUMSTAGES#
paranoid=false
skipNum=0

while true; do
  case "$1" in
    -d|--dummy)
      dummy=true
      ;;
    --help)
      usage 0
      ;;
    -m|--max)
      shift
      maxNum=$1
      ;;
    -p|--paranoid)
      paranoid=true
      ;;
    -s|--skip)
      shift
      skipNum=$1
      ;;
    --version)
      >&2 echo '#VERSION#'
      exit 0
      ;;
    --)
      shift
      [ $# -gt 0 ] && echo 'ERROR: Unknown parameter: '"$#" && usage
      break
      ;;
    *)
      >&2 echo 'That should not happen, '"$1"' unknown though ...'
      exit -1
      ;;
  esac
  shift
done

if [ ! -d "${cacheDir}" ] || [ -z "${cacheDir}" ]
then
  >&2 "ERROR: Cache directory must exist, '${cacheDir}' does not! Closing."
  exit 1
fi

(
  echo -n 'Signature: '
  echo -n '.IsCacheDirectory' | \
    md5sum - | \
    cut -d ' ' -f 1
  echo '# This file is a cache directory tag created by '"$(basename "$0")"'.'
  echo '# For information about cache directory tags, see:'
  echo '#	http://www.brynosaurus.com/cachedir/'
) > "${cacheDir}/CACHEDIR.TAG"
(
  echo '+ .rsync-filter'
  echo '- *'
) > "${cacheDir}/.rsync-filter"

if [ ! "${skipNum}" -ge 0 ] || \
  [ ! "${skipNum}" -le #NUMSTAGES# ] || \
  [ ! "${maxNum}" -ge 0 ] || \
  [ ! "${maxNum}" -le #NUMSTAGES# ]
then
  usage
fi

for ((stage=${skipNum}+1; stage<=${maxNum}; stage++))
do
  echo "entering stage ${stage} ($(do_stage ${stage} '##DESCRIBE##')) ..."
  for backupID in "${!backups[@]}"
  do
    echo "${backupID}:"
    do_stage ${stage} "${backupID}"
  done
  echo "... stage ${stage} completed."
done