Обсуждение: Re: RE: [HACKERS] pg_dump & blobs - editable dump?

At 14:58 12/07/00 +0100, Peter Mount wrote:
>Why not have it using something like tar, and the first file being stored in
>ascii?
>
>That way, you could extract easily the human readable SQL but still pipe the
>blobs to stdout.

Has Tom Lane paid you to send this message? :-}

If anyone can send me a nice interface for reading and writing a tar file
from C, I'll do it. I just don't have the inclination to learn about tar
internals at the moment. By 'nice' I mean that I would like:

- to be able to create the archive and write files sequentially using
something similar to fopen/fwrite/fclose.

- open an archive and examine and read files sequentially using a similar
interface to opendir/readdir/fopen/fread/fclose.

- Ideally open a specified file in the archive by name, but if not
possible, then it should be easy using the 'opedir' function above.

This would be a very useful library, I am sure. It also needs to be
licensable under BSD to go into the PG distribution.


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On Thu, Jul 13, 2000 at 12:17:28AM +1000, Philip Warner wrote:
> At 14:58 12/07/00 +0100, Peter Mount wrote:
> >Why not have it using something like tar, and the first file being stored in
> >ascii?
> >
> >That way, you could extract easily the human readable SQL but still pipe the
> >blobs to stdout.
>
> If anyone can send me a nice interface for reading and writing a tar file
> from C, I'll do it. I just don't have the inclination to learn about tar
> internals at the moment. By 'nice' I mean that I would like:

i suspect you might find a library of either tar or cpio read functions as
part of the FreeBSD sysinstall utility.

--
[ Jim Mercer                 jim@reptiles.org              +1 416 410-5633 ]
[          Reptilian Research -- Longer Life through Colder Blood          ]
[  Don't be fooled by cheap Finnish imitations; BSD is the One True Code.  ]

   If anyone can send me a nice interface for reading and writing a tar file
   from C, I'll do it. I just don't have the inclination to learn about tar
   internals at the moment. By 'nice' I mean that I would like:

I don't know the details of the API, but the NetBSD pax code handles
tar formats (and others) nicely and on a cursory glance seems to have
what you need.  Of course, the license is acceptable.  If you want the
source, let me know.

Cheers,
Brook