Quelltext der Seite Dump-Backupskript

[[Category:BASH]]
Enthält ein paar interessante Hacks.
<source lang="bash">
 #!/bin/bash
 # Funktionen
 function backup_age() {
   LEVEL=$1
   if ! test -f /tmp/backups/home/$LEVEL; then
        return 1
   fi
   LAST_DUMP=$(file /tmp/backups/home/$LEVEL \
        | grep -o "... ... .. ..:..:.. ...." | head -1)
   LAST_DUMP_EPOCH=$(date +%s -d "$LAST_DUMP")
   NOW_EPOCH=$(date +%s)
   echo $((NOW_EPOCH - LAST_DUMP_EPOCH))
 }
 function cleanup() {
   LEVEL=$1
   rm -f /tmp/backups/home/*.tmp
   for file in /tmp/backups/home/*
   do
        base=$(basename $file)
        test "$base" = "*" && break
        test "$base" -le $LEVEL && continue
        rm $file
   done
 }
 
 # Programm
 if ! test $(id -u) = 0; then
   echo "$0: Keine Root-Rechte!" >&2
   exit 1
 fi
 if ! backup_age 0 \
   || test $(backup_age 0) -gt 604800; then
   dump -u -0 -f /tmp/backups/home/0.tmp /home \
   && mv /tmp/backups/home/0{.tmp,}
   cleanup 0
 elif ! backup_age 1 \
   || test $(backup_age 1) -gt 86400; then
   dump -u -1 -f /tmp/backups/home/1.tmp /home \
   && mv /tmp/backups/home/1{.tmp,}
   cleanup 1
 else
   dump -u -2 -f /tmp/backups/home/2.tmp /home \
   && mv /tmp/backups/home/2{.tmp,}
   cleanup 2
 fi
</source>