summaryrefslogtreecommitdiff
path: root/backupStatistics.in
blob: 01e752c5af42805e530f28a7b5fbeac6fa9897bb (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
#!/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}/${dat}" -type f -exec \
          stat -c'%i %n' {} \; >> \
        "${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 -> $contentHash'
        return 0
      fi
      tmpDirA="$(mktemp -d)"
      tmpDirB="$(mktemp -d "${cacheDir}/tmp.XXXXXX")"
      uniq -m1 "${cacheDir}/${backupID}.inodes.sorted" | \
        parallel \
          sha512sum {=s/^[[:digit:]]\+ //=} \| \
            sed "\"s|^\([0-9a-f]\{128\}\)  .*\$|\1 "{=s/^\([[:digit:]]\+\) .*/\\1/=}"|\"" \
          \; | \
        sort -T "${tmpDirA}" -T "${tmpDirB}" > \
        "${cacheDir}/${backupID}.content"
      rmdir "${tmpDirA}" "${tmpDirB}"
    ;;
    4)
      if [ "$2" == '##DESCRIBE##' ]
      then
        echo 'find duplicate hashes'
        return 0
      fi
      (
        uniq -m1 --all-repeated=separate "${cacheDir}/${backupID}.content"
        echo ""
      ) | \
        sed 's|^\S\+ ||' | \
        while read s
        do
          if [ -z "${s}" ]
          then
            echo ""
          else
            echo -n "${s} "
          fi
        done | \
        sed 's| $||' > \
        "${cacheDir}/${backupID}.duplicates"
    ;;
    5)
      if [ "$2" == '##DESCRIBE##' ]
      then
        echo 'remove inodes with duplicate hashes'
        return 0
      fi
      while read line
      do
        original="$(
          grep "^${line%% *} " "${cacheDir}/${backupID}.inodes.sorted" | \
            sed 's|^\S\+ ||'
          )"
        for kopieInode in ${line#* }
        do
          kopie="$(
            grep "^${kopieInode} " "${cacheDir}/${backupID}.inodes.sorted" | \
              sed 's|^\S\+ ||'
            )"
          if ${dummy}
          then
            echo "rm \"${kopie}\""
            echo "ln \"${original}\" \"${kopie}\""
          else
            exit 1
            DO NOT EXECUTE YET
            # rm "${kopie}"
            # ln "${original}" "${kopie}"
          fi
        done
      done < \
        "${cacheDir}/${backupID}.duplicates"
    ;;
  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
  -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 -- "$(
  getopt -o dm:s: \
    --long dummy \
    --long help \
    --long max: \
    --long skip: \
    --long version \
    -n "$(basename "$0")" -- "$@" || \
  echo usage
)"

dummy=false
maxNum=#NUMSTAGES#
skipNum=0

while true; do
  case "$1" in
    -d|--dummy)
      dummy=true
      ;;
    --help)
      usage 0
      ;;
    -m|--max)
      shift
      maxNum=$1
      ;;
    -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

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