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] [<job> [<job> [...]]]"
  46         echo "       $NAME <-d|--dirs> <dir1> <dir2>"
  47         echo
  48         echo "  -d, --dirs      Compare two backup directories (not jobs)."
  49         echo "  -q, --quiet     Quite mode, only list jobs with changes or errors."
  50         echo "  -v, --verbose   Verbose mode, show all checks that are run."
  51         echo
  52         echo "When no <job> is given, all defined jobs are checked."
  53         echo
  54         exit 2
  55 }
  56
  57 BeginDiff() {
  58         echo "Differences in $*:"
  59 }
  60
  61 PipeDiff() {
  62         local line
  63         IFS=
  64         while read -r line; do
  65                 echo -e "     | $line"
  66         done
  67 }
  68
  69 EndDiff() {
  70         :
  71 }
  72
  73 ListDirectory() {
  74         local base_dir="$1"
  75         local dir_name="$2"
  76
  77         local exclude
  78
  79         exclude='total '
  80         if [[ "$dir_name" == "/" ]]; then
  81                 exclude="$exclude"'| \.stamp$| dev$| etc$| proc$| root$| run$| sys$| tmp$'
  82                 exclude="$exclude"'| data$| net$| srv$'
  83                 exclude="$exclude"'| [[:alnum:]_-]+\.log(\.[[:alnum:]]+|)$'
  84         fi
  85
  86         # shellcheck disable=SC2012
  87         ls -Al "$base_dir$dir_name" 2>/dev/null \
  88                 | egrep -v "($exclude)" | awk '!($2="")' | column -t
  89 }
  90
  91 HandleSystem() {
  92         local fname="$1"
  93
  94         # Set global defaults
  95         local backup_type="$default_backup_type"
  96         local files="$default_files"
  97         local generations="$default_generations"
  98         local local=0
  99         local system="$fname"
 100         local target="$default_target"
 101
 102         # Read in system configuration file
 103         # shellcheck source=/dev/null
 104         source "$f"
 105
 106         target="$target/$(basename "$f")"
 107
 108         [[ -d "$target" ]] || return 0
 109
 110         # System name
 111         [[ "$system" == "$fname" ]] \
 112                 && systxt="\"$system\"" \
 113                 || systxt="\"$fname\" [\"$system\"]"
 114         [[ "$local" -eq 0 ]] \
 115                 && echo "Checking $systxt ..." \
 116                 || echo "Checking $systxt (local system) ..."
 117
 118         # Check if job is disabled
 119         if [[ "$backup_type" == "disabled" ]]; then
 120                 echo "Job is DISABLED and will be skipped."
 121                 echo; return 0
 122         fi
 123
 124         if [ $generations -lt 1 ]; then
 125                 echo "No generations configured, nothing to compare, skipping system!"
 126                 echo; return 1
 127         fi
 128
 129         local latest_d="$target/latest"
 130         if [[ ! -d "$latest_d" || ! -r "$latest_d/.stamp" ]]; then
 131                 echo "Failed to access latest backup generation in \"$latest_d\", skipping system!"
 132                 echo; return 1
 133         fi
 134         echo "Found latest generation in \"$latest_d\"."
 135
 136         declare -i code=-1
 137         # shellcheck source=/dev/null
 138         source "$latest_d/.stamp"
 139
 140         if [[ $code -ne 0 && $code -ne 24 ]]; then
 141                 echo "Last backup generation has errors, skipping system!"
 142                 echo; return 1
 143         fi
 144
 145         # Search previous generation without errors
 146         local previous_d=""
 147         # shellcheck disable=SC2045
 148         for d in $(ls -1dt "$target/"[0-9]*-[0-9]* 2>/dev/null); do
 149                 [[ -d "$d" && -r "$d/.stamp" ]] || return 0
 150
 151                 declare -i code=-1
 152                 # shellcheck source=/dev/null
 153                 source "$d/.stamp"
 154
 155                 if [[ $code -eq 0 || $code -eq 24 ]]; then
 156                         previous_d="$d"
 157                         break
 158                 fi
 159         done
 160         if [[ -z "$previous_d" || ! -d "$previous_d" || ! -r "$previous_d/.stamp" ]]; then
 161                 echo "Failed to find previous successfull backup generation, skipping system!"
 162                 echo; return 1
 163         fi
 164         echo "Comparing with generation in $previous_d ..."
 165
 166         DiffGenerations "$backup_type" "$previous_d" "$latest_d" "$files"
 167         return_code=$?
 168
 169         echo
 170         return $return_code
 171 }
 172
 173 DiffGenerations() {
 174         local backup_type="$1"
 175         local gen1_d="$2"
 176         local gen2_d="$3"
 177         local files="$4"
 178
 179         local return_code=0
 180
 181         if [[ "$backup_type" == "rsync" ]]; then
 182                 # rsync Backup Type
 183
 184                 for file in \
 185                         /etc/passwd \
 186                         /etc/shadow \
 187                         /etc/group \
 188                         /etc/gshadow \
 189                         \
 190                         /boot/grub/grub.cfg \
 191                         /etc/aliases \
 192                         /etc/bash.bashrc \
 193                         /etc/crontab \
 194                         /etc/environment \
 195                         /etc/fstab \
 196                         /etc/hostname \
 197                         /etc/hosts \
 198                         /etc/hosts.allow \
 199                         /etc/hosts.deny \
 200                         /etc/inittab \
 201                         /etc/ld.so.conf \
 202                         /etc/login.defs \
 203                         /etc/machine-id \
 204                         /etc/modules \
 205                         /etc/network/interfaces \
 206                         /etc/networks \
 207                         /etc/nsswitch.conf \
 208                         /etc/profile \
 209                         /etc/rc.local \
 210                         /etc/resolv.conf \
 211                         /etc/services \
 212                         /etc/shells \
 213                         /etc/ssh/sshd_config \
 214                         /etc/sshd_config \
 215                         /etc/sudoers \
 216                         /etc/sysctl.conf \
 217                 ; do
 218                         [[ -r "${gen1_d}${file}" ]] || continue
 219
 220                         [[ $VERBOSE -ne 0 ]] && echo "Checking \"$file\" ..."
 221                         if ! diff -U 3 "${gen1_d}${file}" "${gen2_d}${file}" >"$tmp_diff"; then
 222                                 BeginDiff "\"$file\""
 223                                 tail -n +3 "$tmp_diff" | PipeDiff
 224                                 EndDiff
 225                                 return_code=1
 226                         fi
 227                 done
 228
 229                 for dir in \
 230                         / \
 231                         /etc/cron.d/ \
 232                         /etc/cron.daily/ \
 233                         /etc/cron.hourly/ \
 234                         /etc/cron.monthly/ \
 235                         /etc/cron.weekly/ \
 236                         /etc/sudoers.d/ \
 237                         /var/log/dumps/ \
 238                 ; do
 239                         [[ ! -d "${gen1_d}${dir}" ]] && continue
 240                         [[ ! -d "${gen2_d}${dir}" ]] && continue
 241
 242                         # Make sure that this is a system root; comparing other
 243                         # root folders results in misleading output ...
 244                         [[ "$dir" == "/" && ! -d "${gen1_d}${dir}/etc" ]] && continue
 245
 246                         [[ $VERBOSE -ne 0 ]] && echo "Checking \"$dir\" ..."
 247                         ListDirectory "${gen1_d}" "${dir}" >"$tmp_1"
 248                         ListDirectory "${gen2_d}" "${dir}" >"$tmp_2"
 249                         if ! diff -U 0 "$tmp_1" "$tmp_2" >"$tmp_diff"; then
 250                                 BeginDiff "\"$dir\" directory"
 251                                 tail -n +3 "$tmp_diff" | egrep -v '^@@ ' | PipeDiff
 252                                 EndDiff
 253                                 return_code=1
 254                         fi
 255                 done
 256
 257                 if [[ -d "${gen1_d}/var/lib/dpkg/info" && -d "${gen2_d}/var/lib/dpkg/info" ]]; then
 258                         [[ $VERBOSE -ne 0 ]] && echo "Checking list of installed packages ..."
 259                         chroot "${gen1_d}" dpkg --get-selections >"$tmp_1" || return 2
 260                         chroot "${gen2_d}" dpkg --get-selections >"$tmp_2" || return 2
 261                         if ! diff -U 0 "$tmp_1" "$tmp_2" >"$tmp_diff"; then
 262                                 BeginDiff "list of installed packages"
 263                                 tail -n +3 "$tmp_diff" | grep -v '^@@ ' | PipeDiff
 264                                 EndDiff
 265                                 return_code=1
 266                         fi
 267                 fi
 268         elif [[ "$backup_type" == "scp" ]]; then
 269                 # scp Backup type
 270                 file=$(basename "$files")
 271                 [[ $VERBOSE -ne 0 ]] && echo "Checking \"$file\" ..."
 272                 if ! diff -U 3 "${gen1_d}/${file}" "${gen2_d}/${file}" >"$tmp_diff"; then
 273                         BeginDiff "\"$file\""
 274                         tail -n +3 "$tmp_diff" | PipeDiff
 275                         EndDiff
 276                         return_code=1
 277                 fi
 278         else
 279                 echo "Backup type \"$backup_type\" undefined, \"$system\" skipped!"
 280                 echo; return 2
 281         fi
 282
 283         return $return_code
 284 }
 285
 286 MkTempFiles() {
 287         tmp_1=$(mktemp "/tmp/$NAME.XXXXXX") || exit 1
 288         tmp_2=$(mktemp "/tmp/$NAME.XXXXXX") || exit 1
 289         tmp_diff=$(mktemp "/tmp/$NAME.XXXXXX") || exit 1
 290         tmp_out=$(mktemp "/tmp/$NAME.XXXXXX") || exit 1
 291 }
 292
 293 CleanUp() {
 294         rm -f "$tmp_1" "$tmp_2" "$tmp_diff" "$tmp_out"
 295 }
 296
 297 while [[ $# -gt 0 ]]; do
 298         case "$1" in
 299           "-d"|"--dirs")
 300                 shift
 301                 [[ $# -eq 2 ]] || Usage
 302                 MkTempFiles
 303                 DiffGenerations "$default_backup_type" "$1" "$2" "$default_files"
 304                 return_code=$?
 305                 CleanUp
 306                 exit $return_code
 307                 ;;
 308           "-q"|"--quiet")
 309                 QUIET=1; shift
 310                 ;;
 311           "-v"|"--verbose")
 312                 VERBOSE=1; shift
 313                 ;;
 314           "-"*)
 315                 Usage
 316                 ;;
 317           *)
 318                 break
 319         esac
 320 done
 321
 322 if [[ $# -ge 1 ]]; then
 323         for s in "$@"; do
 324                 if [ ! -r "${conf_d}/$s" ]; then
 325                         echo "$NAME: Can' read \"${conf_d}/$s\"!"
 326                         exit 1
 327                 fi
 328                 sys+=("${conf_d}/$s")
 329         done
 330 else
 331         sys=("${conf_d}/"*)
 332 fi
 333
 334 MkTempFiles
 335 for f in "${sys[@]}"; do
 336         [[ -r "$f" && -f "$f" ]] || continue
 337
 338         fname=$(basename "$f")
 339         case "$fname" in
 340                 "backup-script.conf"|*.sh)
 341                         continue
 342                         ;;
 343         esac
 344
 345         HandleSystem "$fname" >"$tmp_out" 2>&1; result=$?
 346         [[ $QUIET -eq 0 || $result -ne 0 ]] && cat "$tmp_out"
 347 done
 348 CleanUp
 349
 350 # -eof-