From: Eric Bollengier <eric at homelinux dot org>

Check size, age of each file after their backup to see if
they have changed during backup.

This patch ask to fd to do an extra check (stat(2)) after
each file backup. mtime, ctime and size are compared with
"before backup" informations. If time or size mismatch, an
error will raise.

You must upgrade FD and DIR at the same time.

TODO:
 - Add documentation
 - Add informations on warning/error messages

Configuration :

FileSet {
  Name = "Full Set"
  Include {
    Options {
      checkchanges = yes           # use this to enable it
    }
    File = /tmp/bacula
  }
}

Output : 

17-fév 18:03 zog-fd: Client1.2007-02-17_18.02.21 Error: /tmp/bacula/etc/toto have changed during backup.
17-fév 18:03 zog-fd: Client1.2007-02-17_18.02.21 Error: /tmp/bacula/var/bacula/working/bacula.db size have changed during backup.
17-fév 18:03 zog-sd: Job write elapsed time = 00:00:03, Transfer rate = 22.94 M bytes/second
17-fév 18:03 zog-dir: Bacula 2.1.4 (12Feb07): 17-fév-2007 18:03:01
  JobId:                  3
  Job:                    Client1.2007-02-17_18.02.21
  Backup Level:           Incremental, since=2007-02-17 17:58:56
  Client:                 "zog-fd" 2.1.4 (12Feb07) i686-pc-linux-gnu,debian,testing/unstable
  FileSet:                "Full Set" 2007-02-17 17:57:36
  Pool:                   "Default" (From Job resource)
  Storage:                "File" (From Job resource)
  Scheduled time:         17-fév-2007 18:02:19
...
  Volume Session Time:    1171731706
  Last Volume Bytes:      5,973,631 (5.973 MB)
  Non-fatal FD errors:    2
  SD Errors:              0
  FD termination status:  OK
  SD termination status:  OK
  Termination:            Backup OK -- with warnings



$Log$