From 42b083a197c3d29cce74c22606e16317f18f808b Mon Sep 17 00:00:00 2001
From: Erich Eckner <git@eckner.net>
Date: Tue, 11 Oct 2016 11:20:06 +0200
Subject: manpage-Erzeugung halbwegs automatisiert

---
 backupStatistics.in | 205 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 205 insertions(+)
 create mode 100644 backupStatistics.in

(limited to 'backupStatistics.in')

diff --git a/backupStatistics.in b/backupStatistics.in
new file mode 100644
index 0000000..d5511bf
--- /dev/null
+++ b/backupStatistics.in
@@ -0,0 +1,205 @@
+#!/bin/bash
+
+# backupStatistics version #VERSION#
+
+. #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 $inode'
+        return 0
+      fi
+      sort -u "${cacheDir}/${backupID}.inodes" > \
+        "${cacheDir}/${backupID}.inodes.sorted"
+    ;;
+    3)
+      if [ "$2" == '##DESCRIBE##' ]
+      then
+        echo 'generate lists $inode -> $contentHash'
+        return 0
+      fi
+      uniq -m1 "${cacheDir}/${backupID}.inodes.sorted" | \
+        parallel \
+          sha512sum {=s/^[[:digit:]]\+ //=} \| \
+            sed "\"s|^\([0-9a-f]\{128\}\)  .*\$|\1 "{=s/^\([[:digit:]]\+\) .*/\\1/=}"|\"" \
+          \; | \
+        sort > \
+        "${cacheDir}/${backupID}.content"
+    ;;
+    4)
+      if [ "$2" == '##DESCRIBE##' ]
+      then
+        echo 'find duplicate hashes'
+        return 0
+      fi
+      uniq -m1 -D "${cacheDir}/${backupID}.content" |
+        sed '
+          :a;
+            $!N;
+            s@^\(\S\+ \)\(.*\)\n\1@\1\2 @;
+            ta;
+          P;
+          D
+          ' | \
+        sed 's|^\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]'
+  >&2 echo 'Search and tidy duplicate and not-hardlinked files in the backups.'
+  >&2 echo ''
+  >&2 echo 'With no options, tidy up all backups. THIS CAN BE VERY TIME CONSUMING.'
+  >&2 echo ''
+  >&2 echo 'Mandatory arguments to long options are mandatory for short options too.'
+  >&2 echo '  -d | --dummy         only generate lists, do not modify backupfiles'
+  >&2 echo '  -h | --help          display this help and exit'
+  >&2 echo '  -m | --max=maxNum    stop execution after step maxNum'
+  >&2 echo '  -s | --skip=skipNum  skip first skipNum steps'
+  >&2 echo '  -V | --version       display version and exit'
+  >&2 echo ''
+  >&2 echo '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 dhm:s:V \
+    --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
+      ;;
+    -h|--help)
+      usage 0
+      ;;
+    -m|--max)
+      shift
+      maxNum=$1
+      ;;
+    -s|--skip)
+      shift
+      skipNum=$1
+      ;;
+    -V|--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 ${stage} ..."
+  for backupID in "${!backups[@]}"
+  do
+    echo "${backupID}:"
+    do_stage ${stage} "${backupID}"
+  done
+  echo "... stage ${stage} completed."
+done
-- 
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