BackupPC-users

Re: [BackupPC-users] Bizarre form of cpool corruption.

2010-12-07 02:35:05
Subject: Re: [BackupPC-users] Bizarre form of cpool corruption.
From: Craig Barratt <cbarratt AT users.sourceforge DOT net>
To: Robin Lee Powell <rlpowell AT digitalkingdom DOT org>
Date: Mon, 6 Dec 2010 23:33:15 -0800
Robin,

> Nope; I'm a big tab completion user, so I would have seen it.  ;)
> 
> $ ls -li /backups/cpool/1/5/c/15c0e4b08058ef3704b8fc24887e2bcc*
> 255523133 -rw-r----- 3 backuppc backuppc 27 Nov 22 19:33 
> /backups/cpool/1/5/c/15c0e4b08058ef3704b8fc24887e2bcc

Hmmm.  I'm not familiar with Jeffrey's zLib code.  What happens
when you compute the digest of this pool file?  Ie:

    perl /tmp/bpctest.pl /backups/cpool/1/5/c/15c0e4b08058ef3704b8fc24887e2bcc

Here is another script that computes the BackupPC digest.  You might need
to modify the library paths.

Craig

######################################################################
#!/bin/perl

use strict;
use lib "/usr/local/BackupPC/lib";
use BackupPC::Lib;
use BackupPC::FileZIO;

die("BackupPC::Lib->new failed\n") if ( !(my $bpc = BackupPC::Lib->new) );

while ( @ARGV ) {
    my $md5 = Digest::MD5->new;
    my($data, $fileSize, $d, $r, $fh);

    if ( !defined($fh = BackupPC::FileZIO->open($ARGV[0], 0, 1)) ) {
        print(STDERR "$0: can't open $ARGV[0]\n");
        exit;
    }

    $fh->read(\$data, 1048576);
    $fileSize += length($data);
    while ( ($r = $fh->read(\$d, 1048576)) > 0 ) {
        $fileSize += $r;
    }
    $fh->close();

    my $digest = $bpc->Buffer2MD5($md5, $fileSize, \$data);

    print("$digest $ARGV[0]\n");

    shift @ARGV;
}

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