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 -r 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         # shellcheck source=/dev/null
 114         source "$latest_d/.stamp"
 115
 116         if [[ $code -ne 0 && $code -ne 24 ]]; then
 117                 echo "Last backup generation has errors, skipping system!"
 118                 echo; return 1
 119         fi
 120
 121         # Search previous generation without errors
 122         local previous_d=""
 123         # shellcheck disable=SC2045
 124         for d in $(ls -1dt "$target/"[0-9]*-[0-9]* 2>/dev/null); do
 125                 [[ -d "$d" && -r "$d/.stamp" ]] || return 0
 126
 127                 declare -i code=-1
 128                 # shellcheck source=/dev/null
 129                 source "$d/.stamp"
 130
 131                 if [[ $code -eq 0 || $code -eq 24 ]]; then
 132                         previous_d="$d"
 133                         break
 134                 fi
 135         done
 136         if [[ -z "$previous_d" || ! -d "$previous_d" || ! -r "$previous_d/.stamp" ]]; then
 137                 echo "Failed to find previous successfull backup generation, skipping system!"
 138                 echo; return 1
 139         fi
 140         echo "Comparing with generation in $previous_d ..."
 141
 142         DiffGenerations "$backup_type" "$previous_d" "$latest_d" "$files"
 143         return_code=$?
 144
 145         echo
 146         return $return_code
 147 }
 148
 149 DiffGenerations() {
 150         local backup_type="$1"
 151         local gen1_d="$2"
 152         local gen2_d="$3"
 153         local files="$4"
 154
 155         local return_code=0
 156
 157         if [[ "$backup_type" == "rsync" ]]; then
 158                 # rsync Backup Type
 159
 160                 for file in \
 161                         /etc/passwd \
 162                         /etc/shadow \
 163                         /etc/group \
 164                         /etc/gshadow \
 165                         \
 166                         /etc/fstab \
 167                         /etc/hostname \
 168                         /etc/hosts \
 169                         /etc/machine-id \
 170                         /etc/modules \
 171                         /etc/network/interfaces \
 172                         /etc/networks \
 173                 ; do
 174                         [[ -r "${gen1_d}${file}" ]] || continue
 175
 176                         [[ $VERBOSE -ne 0 ]] && echo "Checking \"$file\" ..."
 177                         diff -U 3 "${gen1_d}${file}" "${gen2_d}${file}" >"$tmp_diff"
 178                         if [[ $? -ne 0 ]]; then
 179                                 BeginDiff "\"$file\""
 180                                 tail -n +3 "$tmp_diff" | PipeDiff
 181                                 EndDiff
 182                                 return_code=1
 183                         fi
 184                 done
 185
 186                 if [[ -d "${gen1_d}/var/lib/dpkg/info" && -d "${gen2_d}/var/lib/dpkg/info" ]]; then
 187                         [[ $VERBOSE -ne 0 ]] && echo "Checking list of installed packages ..."
 188                         chroot "${gen1_d}" dpkg --get-selections >"$tmp_1" || return 2
 189                         chroot "${gen2_d}" dpkg --get-selections >"$tmp_2" || return 2
 190                         diff -U 0 "$tmp_1" "$tmp_2" >"$tmp_diff"
 191                         if [[ $? -ne 0 ]]; then
 192                                 BeginDiff "list of installed packages"
 193                                 tail -n +3 "$tmp_diff" | grep -v '^@@ ' | PipeDiff
 194                                 EndDiff
 195                                 return_code=1
 196                         fi
 197                 fi
 198         elif [[ "$backup_type" == "scp" ]]; then
 199                 # scp Backup type
 200                 file=$(basename "$files")
 201                 [[ $VERBOSE -ne 0 ]] && echo "Checking \"$file\" ..."
 202                 diff -U 3 "${gen1_d}/${file}" "${gen2_d}/${file}" >"$tmp_diff"
 203                 if [[ $? -ne 0 ]]; then
 204                         BeginDiff "\"$file\""
 205                         tail -n +3 "$tmp_diff" | PipeDiff
 206                         EndDiff
 207                         return_code=1
 208                 fi
 209         else
 210                 echo "Backup type \"$backup_type\" undefined, \"$system\" skipped!"
 211                 echo; return 2
 212         fi
 213
 214         return $return_code
 215 }
 216
 217 MkTempFiles() {
 218         tmp_1=$(mktemp "/tmp/$NAME.XXXXXX") || exit 1
 219         tmp_2=$(mktemp "/tmp/$NAME.XXXXXX") || exit 1
 220         tmp_diff=$(mktemp "/tmp/$NAME.XXXXXX") || exit 1
 221         tmp_out=$(mktemp "/tmp/$NAME.XXXXXX") || exit 1
 222 }
 223
 224 CleanUp() {
 225         rm -f "$tmp_1" "$tmp_2" "$tmp_diff" "$tmp_out"
 226 }
 227
 228 while [[ $# -gt 0 ]]; do
 229         case "$1" in
 230           "-d"|"--dirs")
 231                 shift
 232                 [[ $# -eq 2 ]] || Usage
 233                 MkTempFiles
 234                 DiffGenerations "$default_backup_type" "$1/" "$2/" "$default_files"
 235                 return_code=$?
 236                 CleanUp
 237                 exit $return_code
 238                 ;;
 239           "-q"|"--quiet")
 240                 QUIET=1; shift
 241                 ;;
 242           "-v"|"--verbose")
 243                 VERBOSE=1; shift
 244                 ;;
 245           "-"*)
 246                 Usage
 247                 ;;
 248           *)
 249                 break
 250         esac
 251 done
 252
 253 if [[ $# -ge 1 ]]; then
 254         for s in "$@"; do
 255                 if [ ! -r "${conf_d}/$s" ]; then
 256                         echo "$NAME: Can' read \"${conf_d}/$s\"!"
 257                         exit 1
 258                 fi
 259                 sys+=("${conf_d}/$s")
 260         done
 261 else
 262         sys=("${conf_d}/"*)
 263 fi
 264
 265 MkTempFiles
 266 for f in "${sys[@]}"; do
 267         [[ -r "$f" && -f "$f" ]] || continue
 268
 269         fname=$(basename "$f")
 270         case "$fname" in
 271                 "backup-script.conf"|*.sh)
 272                         continue
 273                         ;;
 274         esac
 275
 276         HandleSystem "$fname" >"$tmp_out" 2>&1
 277         [[ $QUIET -eq 0 || $? -ne 0 ]] && cat "$tmp_out"
 278 done
 279 CleanUp
 280
 281 # -eof-