Hi,
22.07.2008 05:04, Henry Yen wrote:
> perhaps looking up the parent processid. in bash, it's a preset variable
> called "$PPID"; from there, look up the parent's process name.
That won't work, because mtx-changer is not executed by bconsole.
bconsole passes its commands to the DIR, the DIR interprets them,
decides what to do, and - in this case - passes some commands to the SD.
It's probably possible to do what Mark wants in the SD; the SD
probably knows if the changer stuff it's working on was triggered by
itself running a job, or is unrelated to any SD activity.
I guess this is a bit complicated and requires a good understanding of
the Bacula code (in which case you wouldn't have asked the initial
question ;-)
Anyway, what I would do is a bit different.
In case of problems you're already working interactively.
Now, issuing mtx and btape commands is probably easily possible.
So I suggest to simply unmount from bconsole, do your necessary work
(you could call a modified mtx-changer script from the shell), and
when you're done, you remont from bconsole.
Much less work to implement such a procedure :-)
Arno
> On Mon, Jul 21, 2008 at 17:25:03PM -0700, Mark Nienberg wrote:
>> I'd like to be able to use a different version of the mtx-changer script
>> when I use
>> bconsole than the one I assigned to the "Changer Command" in bacula-sd.conf.
>> I guess
>> I can script a wrapper for bconsole to rename the mtx-changer scripts as
>> needed and
>> then change them back afterward. Or I could write a script to run before
>> and after
>> scheduled jobs to do the same thing. But if anyone has a better idea I'd
>> like to
>> hear it. Ideal solution would be if the mtx-changer script could recognize
>> if it is
>> being called from bconsole vs a bacula backup or restore job.
>>
>> Thanks,
>>
>> Mark
>>
>> P.S. Why? Because I have modified the "load" command to use "btape" to read
>> the
>> bacula label on the volume after loading it. If it fails, then it unloads
>> and
>> reloads the tape and tries again. This is an attempt to automatically fix
>> the I/O
>> problem that happens about 10-20% of the times bacula changes a tape in the
>> middle of
>> a backup. Note that it is not a timing problem. It happens even after
>> "wait_for_drive" returns ready. Obviously, when working at bconsole, there
>> are some
>> commands that I have to perform on tapes that have no labels, so I need a
>> different
>> "load" command. But don't get bogged down thinking about all this, just
>> think about
>> the question above, OK?
>
--
Arno Lehmann
IT-Service Lehmann
www.its-lehmann.de
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