home *** CD-ROM | disk | FTP | other *** search
- ========================== Flat-Handler 1.3 ==========================
- ======================================================================
- A zany disk filing system, written by Olaf 'Olsen' Barthel of MXM.
- Copyright, © 1990 by MXM. Shareware, all rights reserved. No
- guarantee of any kind is made that the program(s) described in this
- document are 100% reliable. You use this material on your own risk.
-
- ============================== Purpose ===============================
- ======================================================================
- The university I am studying at has just got rid of its old IBM
- mainframe monster which has been replaced by set of Sun4 Sparc IPC
- workstations. Each station has its own disk drive built into the main
- unit. Transfer of data to and from the disk is easy if you know how
- to accomplish it. Standard 3½" disks can be formatted in vanilla
- MS-DOS format (double sided, 9 sectors, 512 bytes each) and read using
- MessyDOS/CrossDOS. Unfortunately, `pcfs' is not available on the
- machines I am working at, still using `tar' makes it easy to exchange
- files between both computers.
- The Amiga does not support block mapped files in the same way Un*x
- does. My first attempt to read tar archives written to disk would
- therefore consist of creating a disk-like file on my harddisk (using
- Matt Dillon's fmsdisk.device) and reading the disk-file with tar.
- This being not the ideal solution I immediately started writing a
- custom filing system to map all block-oriented filing devices to
- virtual files.
-
- =============================== Usage ================================
- ======================================================================
- Copy `Flat-Handler' to your L: directory (copy Flat-Handler L:) and
- add the supplied `MountList' file to your DEVS:MountList (type
- >>DEVS:MountList MountList). After that, the FLAT:-device is ready to
- be mounted (mount FLAT:).
- Listing `FLAT:' will display something like the following:
-
- MSH 737280 ----r--- Today 16:42:01
- DF0 901120 ----rw-- Today 16:42:01
- DF1 0 -------- Today 16:42:01
- DH0 10948608 ----rw-- Today 16:42:01
- DH1 10616832 ----rw-- Today 16:42:01
-
- Each one of these `files' represents a disk-like block-oriented
- filing device (which has the same name, only the colon is left out).
- You can copy, type, read and write each device just like an ordinary
- file. Each read/write call is mapped to a disk access which allows
- archiving whole disks with LhArc or diskcopy'ing with the CLI
- copy-command. The protection bits refer to the state of the disk
- drive and the data media within:
-
- r - There is a disk in the disk drive.
- w - The disk is write-enabled.
-
- All the other protection bits are by default cleared (you won't be
- able to delete a disk drive, set the `archived' bit or other foolish
- bits). The file creations dates are fake, and the file sizes will
- never change (never say never: if there is no disk in the approriate
- drive the size of a file will drop to zero). The handler itself
- supports only the basic command set a simple filing system needs to
- supply (read, write, open, close, lock, unlock, duplock, die).
-
- ================ Transferring files from/to the Sun4 =================
- ======================================================================
- To transfer files from/to the Sun4 workstation you will need MessyDOS
- or CrossDOS and the Amiga implementation of the `tar' program.
- The disk format on the Amiga (MSH:, DI0:, etc.) side must be
- configured for a double-sided, 80-track disk with 9 blocks per track.
- These settings represent the `factory settings' with which
- MessyDOS/CrossDOS are shipped, so there is probably no need to change
- them.
- Now it's time to initialize a disk, this can either be done on the
- Amiga (using "format drive msh: name Blank noicons") or on the Sun
- (using "fdformat -l").
- Here are the basic commands to get tar to create and extract disk
- archives (tar offers a lot more options which you will probably want
- to study later):
-
- To create an archive:
-
- Sun4: tar -cf /dev/fd0 <Files...>
- Amiga: tar -cf flat:msh <Files...>
-
- To extract files from an archive:
-
- Sun4: tar -xf /dev/fd0 <Files...>
- Amiga: tar -xf flat:msh <Files...>
-
- To eject the disk from the Sun4 disk drive enter `eject'.
-
- =============================== Author ===============================
- ======================================================================
- This program was written by Olaf Barthel of MXM. All files have been
- placed in the public domain. You may freely distribute this material,
- even a small copy fee is okay but everything which looks like
- commercial distribution is forbidden. Still you may use this material
- for software development without giving credit to the original author.
-
- Send new program revisions, comments, bug reports, donations,
- unmarried sisters, non-poisoned candy, home-grown palm trees,
- horoscopes, promising capital investments, etc. to:
-
- Olaf Barthel, MXM
- Brabeckstrasse 35
- D-3000 Hannover 71
-
- Federal Republic of Germany
-
- ============ Revision history (most recent change first) =============
- ======================================================================
- V1.3 Added support for ACTION_COPY_DIR packet.
-
- V1.2 You couldn't change the current directory to `FLAT:' and
- examine the virtual files without having to specify a full
- path name (such as `flat:df0'), this has been fixed.
-
- V1.1 Extended release supporting all available block-oriented
- filing devices.
-
- V1.0 First simple release supporting only a single disk drive.
-