bin/backup-audit

   1 #!/bin/bash
   2 #
   3 # backup-script system for cloning systems using rsync
   4 # Copyright (c)2008-2016 Alexander Barton, alex@barton.de
   5 #
   6 # This program is free software; you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation; either version 2 of the License, or
   9 # (at your option) any later version.
  10 # Please read the file COPYING, README and AUTHORS for more information.
  11 #
  12
  13 NAME=`basename $0`
  14
  15 VERBOSE=0
  16 QUIET=0
  17
  18 export LC_ALL=C
  19
  20 # Default settings, can be overwritten in backup-script.conf:
  21 [ -d "/usr/local/etc/backup-script.d" ] \
  22         && conf_d="/usr/local/etc/backup-script.d" \
  23         || conf_d="/etc/backup-script.d"
  24
  25 default_backup_type="rsync"
  26 default_files="running-config"
  27 default_generations=0
  28 default_target="/var/backups"
  29
  30 # Search configuration file (last one is used as default!)
  31 for conf in \
  32         "/usr/local/etc/backup-script.conf" \
  33         "/etc/backup-script.conf" \
  34         "${conf_d}/backup-script.conf" \
  35         "/usr/local/etc/backup-script.conf" \
  36 ; do
  37         if [ -r "$conf" ]; then
  38                 # shellcheck source=/dev/null
  39                 source "$conf"
  40                 break
  41         fi
  42 done
  43
  44 Usage() {
  45         echo "Usage: $NAME [-q|--quiet] [-v|--verbose] [<system> [<system> [...]]]"
  46         echo "       $NAME <-d|--dirs> <dir1> <dir2>"
  47         echo
  48         exit 2
  49 }
  50
  51 BeginDiff() {
  52         echo "Differences in $*:"
  53 }
  54
  55 PipeDiff() {
  56         local line
  57         IFS=
  58         while read line; do
  59                 echo -e "     | $line"
  60         done
  61 }
  62
  63 EndDiff() {
  64         :
  65 }
  66
  67 HandleSystem() {
  68         local fname="$1"
  69
  70         # Set global defaults
  71         local backup_type="$default_backup_type"
  72         local files="$default_files"
  73         local generations="$default_generations"
  74         local local=0
  75         local system="$fname"
  76         local target="$default_target"
  77
  78         # Read in system configuration file
  79         # shellcheck source=/dev/null
  80         source "$f"
  81
  82         target="$target/$(basename "$f")"
  83
  84         [[ -d "$target" ]] || return 0
  85
  86         # System name
  87         [[ "$system" == "$fname" ]] \
  88                 && systxt="\"$system\"" \
  89                 || systxt="\"$fname\" [\"$system\"]"
  90         [[ "$local" -eq 0 ]] \
  91                 && echo "Checking $systxt ..." \
  92                 || echo "Checking $systxt (local system) ..."
  93
  94         # Check if job is disabled
  95         if [[ "$backup_type" == "disabled" ]]; then
  96                 echo "Job is DISABLED and will be skipped."
  97                 echo; return 0
  98         fi
  99
 100         if [ $generations -lt 1 ]; then
 101                 echo "No generations configured, nothing to compare, skipping system!"
 102                 echo; return 1
 103         fi
 104
 105         local latest_d="$target/latest"
 106         if [[ ! -d "$latest_d" || ! -r "$latest_d/.stamp" ]]; then
 107                 echo "Failed to access latest backup generation in \"$latest_d\", skipping system!"
 108                 echo; return 1
 109         fi
 110         echo "Found latest generation in \"$latest_d\"."
 111
 112         declare -i code=-1
 113         source "$latest_d/.stamp"
 114
 115         if [[ $code -ne 0 && $code -ne 24 ]]; then
 116                 echo "Last backup generation has errors, skipping system!"
 117                 echo; return 1
 118         fi
 119
 120         # Search previous generation without errors
 121         local previous_d=""
 122         for d in $(ls -1dt $target/[0-9]*-[0-9]*); do
 123                 [[ -d "$d" && -r "$d/.stamp" ]] || return 0
 124
 125                 declare -i code=-1
 126                 source "$d/.stamp"
 127
 128                 if [[ $code -eq 0 || $code -eq 24 ]]; then
 129                         previous_d="$d"
 130                         break
 131                 fi
 132         done
 133         if [[ -z "$previous_d" || ! -d "$previous_d" || ! -r "$previous_d/.stamp" ]]; then
 134                 echo "Failed to find previous successfull backup generation, skipping system!"
 135                 echo; return 1
 136         fi
 137         echo "Comparing with generation in $previous_d ..."
 138
 139         DiffGenerations "$backup_type" "$previous_d" "$latest_d" "$files"
 140         return_code=$?
 141
 142         echo
 143         return $return_code
 144 }
 145
 146 DiffGenerations() {
 147         local backup_type="$1"
 148         local gen1_d="$2"
 149         local gen2_d="$3"
 150         local files="$4"
 151
 152         local return_code=0
 153
 154         if [[ "$backup_type" == "rsync" ]]; then
 155                 # rsync Backup Type
 156
 157                 for file in \
 158                         /etc/passwd \
 159                         /etc/shadow \
 160                         /etc/group \
 161                         /etc/gshadow \
 162                         \
 163                         /etc/fstab \
 164                         /etc/hostname \
 165                         /etc/hosts \
 166                         /etc/machine-id \
 167                         /etc/modules \
 168                         /etc/network/interfaces \
 169                         /etc/networks \
 170                 ; do
 171                         [[ -r "${gen1_d}${file}" ]] || continue
 172
 173                         [[ $VERBOSE -ne 0 ]] && echo "Checking \"$file\" ..."
 174                         diff -U 3 "${gen1_d}${file}" "${gen2_d}${file}" >"$tmp_diff"
 175                         if [[ $? -ne 0 ]]; then
 176                                 BeginDiff "\"$file\""
 177                                 tail -n +3 "$tmp_diff" | PipeDiff
 178                                 EndDiff
 179                                 return_code=1
 180                         fi
 181                 done
 182
 183                 if [[ -d "${gen1_d}/var/lib/dpkg/info" && -d "${gen2_d}/var/lib/dpkg/info" ]]; then
 184                         [[ $VERBOSE -ne 0 ]] && echo "Checking list of installed packages ..."
 185                         chroot "${gen1_d}" dpkg --get-selections >"$tmp_1" || return 2
 186                         chroot "${gen2_d}" dpkg --get-selections >"$tmp_2" || return 2
 187                         diff -U 0 "$tmp_1" "$tmp_2" >"$tmp_diff"
 188                         if [[ $? -ne 0 ]]; then
 189                                 BeginDiff "list of installed packages"
 190                                 tail -n +3 "$tmp_diff" | grep -v '^@@ ' | PipeDiff
 191                                 EndDiff
 192                                 return_code=1
 193                         fi
 194                 fi
 195         elif [[ "$backup_type" == "scp" ]]; then
 196                 # scp Backup type
 197                 file=$(basename "$files")
 198                 [[ $VERBOSE -ne 0 ]] && echo "Checking \"$file\" ..."
 199                 diff -U 3 "${gen1_d}/${file}" "${gen2_d}/${file}" >"$tmp_diff"
 200                 if [[ $? -ne 0 ]]; then
 201                         BeginDiff "\"$file\""
 202                         tail -n +3 "$tmp_diff" | PipeDiff
 203                         EndDiff
 204                         return_code=1
 205                 fi
 206         else
 207                 echo "Backup type \"$backup_type\" undefined, \"$system\" skipped!"
 208                 echo; return 2
 209         fi
 210
 211         return $return_code
 212 }
 213
 214 MkTempFiles() {
 215         tmp_1=$(mktemp /tmp/$NAME.XXXXXX) || exit 1
 216         tmp_2=$(mktemp /tmp/$NAME.XXXXXX) || exit 1
 217         tmp_diff=$(mktemp /tmp/$NAME.XXXXXX) || exit 1
 218         tmp_out=$(mktemp /tmp/$NAME.XXXXXX) || exit 1
 219 }
 220
 221 CleanUp() {
 222         rm -f "$tmp_1" "$tmp_2" "$tmp_diff" "$tmp_out"
 223 }
 224
 225 while [[ $# -gt 0 ]]; do
 226         case "$1" in
 227           "-d"|"--dirs")
 228                 shift
 229                 [[ $# -eq 2 ]] || Usage
 230                 MkTempFiles
 231                 DiffGenerations "$default_backup_type" "$1/" "$2/" "$default_files"
 232                 return_code=$?
 233                 CleanUp
 234                 exit $return_code
 235                 ;;
 236           "-q"|"--quiet")
 237                 QUIET=1; shift
 238                 ;;
 239           "-v"|"--verbose")
 240                 VERBOSE=1; shift
 241                 ;;
 242           "-"*)
 243                 Usage
 244                 ;;
 245           *)
 246                 break
 247         esac
 248 done
 249
 250 if [[ $# -ge 1 ]]; then
 251         for s in "$@"; do
 252                 if [ ! -r "${conf_d}/$s" ]; then
 253                         echo "$NAME: Can' read \"${conf_d}/$s\"!"
 254                         exit 1
 255                 fi
 256                 sys+=("${conf_d}/$s")
 257         done
 258 else
 259         sys=("${conf_d}/"*)
 260 fi
 261
 262 MkTempFiles
 263 for f in "${sys[@]}"; do
 264         [[ -r "$f" && -f "$f" ]] || continue
 265
 266         fname=`basename $f`
 267         case "$fname" in
 268                 "backup-script.conf"|*.sh)
 269                         continue
 270                         ;;
 271         esac
 272
 273         HandleSystem "$fname" >"$tmp_out" 2>&1
 274         [[ $QUIET -eq 0 || $? -ne 0 ]] && cat "$tmp_out"
 275 done
 276 CleanUp
 277
 278 # -eof-