Holger Parplies wrote at about 16:28:06 +0200 on Monday, May 23, 2011:
> Hi,
>
> Nick Bright wrote on 2011-05-22 23:27:58 -0500 [Re: [BackupPC-users] How to
> delete specific files from backups? (with BackupPC_deleteFile.pl)]:
> > On 5/22/2011 7:14 PM, Nick Bright wrote:
> > > Sounds to me like the BackupPC_deleteFile script is the way to go:
> > [...]
> > No matter what options I give it, it just won't delete anything.
> >
> > There is a complete void of examples, and there is no indication of what
> > valid inputs are for the arguments are in the documention, so I'm not
> > even sure if I'm doing it correctly.
>
> Jeffrey? ;-)
I responded :)
>
> > I've tried:
> >
> > BackupPC_deleteFile.pl -h hostname -n - -d 4 /var/log/maillog
> > [...]
> >
> > But they all just give the same output - nothing deleted.
>
> >From that example, the general syntax of the BackupPC_* commands provided
> >with
> BackupPC, and the expectation that Jeffrey will follow their conventions,
> I'd expect you need to provide a '-s <sharename>' argument and probably
> the path within this share as either relative or absolute path. So, if you
> have a share '/var', that would be
>
> BackupPC_deleteFile.pl -h hostname -n - -d 4 -s /var /log/maillog
>
Correct if /var is the share or if '/' is the share then it would be
-s '/' or alternatively -s %2f (which is how it is encoded in your pc
directory). Note for /var as the share you could also use the %2fvar
encoding.
For the file/directory names, the default is to use mangled paths so
you would need to write /flog/fmaillog unless you use the '-m' flag to
accept unmangled paths in which case /var/log/maillog works fine. The
leading / is optional.
If using mangled paths then as a special case you can avoid using the
share name if you use the full *mangled* and encoded path from root
which in this case would be:
f%2f/fvar/flog/fmaillog
> (don't know what '-d 4' does, though; aside from that, where did you get
> '-n -' from? Maybe try '-n -1'?).
structure of incremental backup dependen
The '-' allows for a range of backup numbers. Say '20-35' and
extending that convention:
'-35' is all backups up to 35 inclusive
'20-' is all backups from 20 and on
'-' is all backups
Then by extension for consistency, '-' is also used as the wildcard
for host names and share names. Note using '*' as a wildcard is not a
good idea since it would need to be quoted to prevent the shell from
interpreting it.
The '-d' specifies debugging levels so for example you can see what
exact hosts/shares/backups are being searched and so you can see the
hierarchy of incrementals and what exactly is being deleted/moved
etc. to preserve the inheritance based on the specific backup numbers
you want deleted. It also allows you to see what attributes are erased
vs. marked as type=deleted etc.
> You probably have a share '/', so it would be '-s / /var/log/maillog' or
> '-s / var/log/maillog' instead. It really depends on how you set your
> backups up, because that determines how BackupPC stores them.
>
> But I'm just guessing.
You guessed right.
I'd look at the script, but I don't really have the
> time right now. Wait for an authoritative answer if you don't feel like
> experimenting (but you probably do - you've already done so ;-).
>
> Hope that helps.
I'm sure it helped him, but I just filled in a little more.
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