/sources/plan9/sys/lib/backup/
      1904 2013-12-03 backup
      1369 2013-11-12 backuparenas
       638 2009-06-15 dupdisc
      1199 2009-02-27 funcs
        63 2013-07-13 mkfile
      2440 2009-06-15 restore
         0 2008-06-25 set1/
       913 2008-06-21 tobackup