Re: Help with ProDOS file structure!

[vandry@CAM.ORG (Phillip Vandry)]

phandel@sempco.uucp (Peter Handel) writes:

>I keep on doing the stupidest thing: in ProTERM v3.1's editor, I load a big,
>important file, delete everything but the one line I want to send to the modem,
>and then forget to press escape; so when I hit <openapple> 's', I save the line
>onto the BIG file...ack.  This has happened to me about 3 or 4 times.  Here's
>my question: How do I edit the file's information to tell ProDOS that the file
>is 10 times as long as it thinks it is?  I've tried increasing the "number of
>blocks" and "end of file pointer" with ProSel 16's Zap, but the file, upon
>examination, only contains '00' for the specified length...where's the real
>length stored?  And what's a 'Case Implementation'?

Your problem is that all the blocks but the first have been deallocated. In
addition to correcting the length of the file and blocks used count, you
would have to find each block that was originally part of the file, get
them in order, and reconstruct the mapping

>What I do is copy a big file onto a 3.5" disk, and then manually copy the
>important file block by block onto the dummy file on the 3.5".  This works, but
>it takes time and is dangerous.

Anything you try to solve this problem is dangerous, and takes lots of time.
It is always much easier to undelete a file than to lengthen it.

Too bad...

-Phil