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- From: John.Cocula@f347.n109.z1.fidonet.org (John Cocula)
- Sender: Uucp@blkcat.UUCP
- Path: sparky!uunet!blkcat!Uucp
- Newsgroups: comp.os.os2.programmer
- Subject: Re: File Systems and Bac
- Message-ID: <724299123.AA00000@blkcat.UUCP>
- Date: Sun, 13 Dec 1992 17:09:04 -0500
- Lines: 54
-
- In a message to All <12-11-92 01:57>, Matthew Edward Patton writes:
-
- ME> 1. Where,how are the Extended attributes stored? Is it tacked onto
- ME> the
- ME> end of the file? Are they kept in a special hidden file in the
- ME> directory?
-
- Under HPFS, all or part of EAs are kept in the fnode (similar to
- Unix's inodes). Under FAT, they are kept in clusters referenced by
- \EA DATA. SF. Otherwised unused slots in FAT directory entries refer
- to these clusters.
-
- ME> 2. The popular OS2 compression Utilities Info's Zip and UnZip, do they
- ME> keep track of extended attributes and successfully store them?
-
- Yes.
-
- ME> 3. Are sources for OS2's backup.exe and restore.exe available?
-
- No.
-
- ME> 4. Has ANYONE gotten Borland C++ 3.1 to run under a dos window in
- ME> OS2.
-
- I have heard that one has to set DPMI to ENABLED, not AUTO in the
- DOS session's Session page.
-
- ME> 5. can a DOS program access the extended attributes or is there a way
- ME> to "dump/extract" the attributes and then "paste" them on again?
-
- DOS programs don't see EAs, and often lose them. OS/2 has an
- OS/2-only utility called EAUTIL that will split them off into files
- and rejoin them.
-
- ME> 6. Is there a Programmers' guide to the OS2 kernel or os2/mdos kernel
- ME> available? (something like the Norton Programmer's guide to DOS:
- ME> funcalls, interupts, the works)
-
- OS/2 has numerous reference books available from IBM. Microsoft
- has/had ones on the 16-bit API. They are all on-line for $15 on
- CD-ROM (if you are in the U.S.): 1-800-3IBMOS2.
-
- ME> Explaination: I want to write a HD backup program for os2 which will
- ME> operate under either FAT or HPFS and use the TurboVision IDE style
- ME> interface. (if you know how I might implement the interface under gcc
- ME> or something else let me know) Anyway, I plan to develope under BCC
- ME> and run it as a DOS app under OS2. Is this possible? Feasible?
-
- Sure, but an OS/2 backup utility would be more popular if it were an
- OS/2 app, not a DOS app. Borland has their 32-bit C++ development
- environment in beta test right now, supposed to be out 1Q93 (soon).
-
- John
-
-