bin/backup-status

   1 #!/bin/bash
   2 #
   3 # backup-script system for cloning systems using rsync
   4 # Copyright (c)2008-2015 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 $0`
  14 PIDFILE="/var/run/backup-script.pid"
  15 QUICK=0
  16 ONLY_ERRORS=0
  17 ONLY_LATEST=0
  18
  19 export LC_ALL=C
  20
  21 declare -i count=0
  22 declare -i snapshots=0
  23
  24 # Default settings, can be overwritten in backup-script.conf:
  25 [ -d "/usr/local/etc/backup-script.d" ] \
  26         && conf_d="/usr/local/etc/backup-script.d" \
  27         || conf_d="/etc/backup-script.d"
  28 default_target="/var/backups"
  29 default_generations=0
  30
  31 # Search configuration file (last one is used as default!)
  32 for conf in \
  33         "/usr/local/etc/backup-script.conf" \
  34         "/etc/backup-script.conf" \
  35         "${conf_d}/backup-script.conf" \
  36         "/usr/local/etc/backup-script.conf" \
  37 ; do
  38         if [ -r "$conf" ]; then
  39                 source "$conf"
  40                 break
  41         fi
  42 done
  43
  44 Usage() {
  45         echo "Usage: $NAME [--errors|--latest] [--quick] [<system> [<system> [...]]]"
  46         echo "       $NAME --running"
  47         echo
  48         echo "  --errors, -e    Only show current backups with errors (implies \"--latest\")."
  49         echo "  --latest, -l    Only show latest backup generations."
  50         echo "  --quick, -q     Don't calculate backup sizes."
  51         echo "  --running, -r   Check if an \"backup-script\" task is currently running."
  52         echo
  53         exit 2
  54 }
  55
  56 Check_Size() {
  57         # $1: directory
  58         # $2: padding
  59
  60         if [ "$QUICK" = "0" ]; then
  61                 size=`du -Hhs "$1" | cut -f1`
  62                 echo "$2  - Size:" $size
  63         fi
  64 }
  65
  66 Check_Stamp() {
  67         # $1: stamp file
  68         # $2: padding
  69
  70         if [ -f "$1" ]; then
  71                 if [ "$(uname)" = "Linux" ]; then
  72                         last=`LC_ALL=C stat "$1" | grep "^Modify: " \
  73                          | cut -d':' -f2- | cut -d. -f1`
  74                 else
  75                         last=`LC_ALL=C stat -f "%Sc" "$1"`
  76                 fi
  77                 [ -n "$last" ] && echo "$2  - Date:" $last
  78                 code=
  79                 source "$1"
  80                 case "$code" in
  81                   0)    txt=", OK"; ;;
  82                   24)   txt=", WARNING (some files vanished during backup)"; ;;
  83                   *)    txt=", ERROR"
  84                 esac
  85                 [ -n "$code" ] && echo "$2  - Result code: $code$txt"
  86         else
  87                 echo "$2  - No timestamp recorded! Backup currently running or aborted?"
  88         fi
  89 }
  90
  91 Snapshot_Info() {
  92         echo "  - Snapshot: $1"
  93         Check_Size "$1" "  "
  94         Check_Stamp "$1/.stamp" "  "
  95 }
  96
  97 Get_Result_Code() {
  98         code=1
  99         [ -r "$1" ] && source "$1"
 100         [ -z "$code" ] && code=1
 101         echo $code
 102 }
 103
 104 if [ "$1" == "-r" -o "$1" == "--running" ]; then
 105         pid="$(cat "$PIDFILE" 2>/dev/null)"
 106         if [ -n "$pid" ]; then
 107                 if kill -0 "$pid" >/dev/null 2>&1; then
 108                         echo "Backup job running with PID $pid."
 109                         echo
 110                         pstree -ap "$pid" 2>/dev/null
 111                         exit 0
 112                 else
 113                         echo "No backup running (invalid PID $pid in \"$PIDFILE\")."
 114                         exit 1
 115                 fi
 116         fi
 117         echo "No backup running (no PID file \"$PIDFILE\" found)."
 118         exit 1
 119 fi
 120
 121 while [ $# -gt 0 ]; do
 122         case "$1" in
 123                 "--errors"|"-e")
 124                         ONLY_ERRORS=1
 125                         ONLY_LATEST=1
 126                         ;;
 127                 "--latest"|"-l")
 128                         ONLY_LATEST=1
 129                         ;;
 130                 "--quick"|"-q")
 131                         QUICK=1
 132                         ;;
 133                 "-"*)
 134                         Usage
 135                         ;;
 136                 *)
 137                         break
 138         esac
 139         shift
 140 done
 141
 142 if [ $# -ge 1 ]; then
 143         for s in "$@"; do
 144                 if [ ! -r "${conf_d}/$s" ]; then
 145                         echo "$NAME: Can' read \"${conf_d}/$s\"!"
 146                         exit 1
 147                 fi
 148                 sys="$sys ${conf_d}/$s"
 149         done
 150 else
 151         sys="${conf_d}/"*
 152 fi
 153
 154 for f in $sys; do
 155         [ -r "$f" -a -f "$f" ] || continue
 156
 157         fname=`basename $f`
 158         case "$fname" in
 159                 "backup-script.conf"|*.sh)
 160                         continue
 161                         ;;
 162         esac
 163
 164         # Set global defaults
 165         system="$fname"
 166         target="$default_target"
 167         generations="$default_generations"
 168
 169         # Read in system configuration file
 170         source "$f"
 171
 172         target="$target/$(basename "$f")"
 173
 174         [ -d "$target" ] || continue
 175
 176         if [ "$ONLY_ERRORS" != "0" ]; then
 177                 [ $generations -gt 0 ] \
 178                         && result=$(Get_Result_Code "$target/latest/.stamp") \
 179                         || result=$(Get_Result_Code "$target/.stamp")
 180                 [ $result -eq 0 -o $result -eq 24 ] && continue
 181         fi
 182
 183         # System name
 184         [ "$system" = "$fname" ] && echo "$fname" || echo "$fname [$system]"
 185
 186         # System target directory
 187         echo "- Target: $target"
 188
 189         if [ $generations -gt 0 ]; then
 190                 if [ "$ONLY_LATEST" = "0" ]; then
 191                         for s in $target/[0-9]*-[0-9]* $target/current; do
 192                                 [ -e "$s" ] || continue
 193                                 Snapshot_Info "$s"
 194                                 snapshots=$snapshots+1
 195                         done
 196                 elif [ -e "$target/latest" ]; then
 197                         Snapshot_Info "$target/latest"
 198                         snapshots=$snapshots+1
 199                 fi
 200         else
 201                 # Timestamp and result code
 202                 Check_Size "$target"
 203                 Check_Stamp "$target/.stamp"
 204                 snapshots=$snapshots+1
 205         fi
 206
 207         count=$count+1
 208         echo
 209 done
 210
 211 if [ $count -lt 1 ]; then
 212         echo "No backups found!"
 213         exit 1
 214 fi
 215 [ $count -eq 1 ] && sc="" || sc="s"
 216 [ $snapshots -eq 1 ] && ss="" || ss="s"
 217 echo "$count system backup$sc found, $snapshots snapshot$ss."
 218
 219 # -eof-