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- Xpk File System Handler
- =======================
-
- Copyright:
- ----------
-
- © Copyright 1992, Freeware, All rights reserved
-
- Distribution EXCLUSIVELY permitted to the XPK authors as part of their XPK
- package. Other forms of distribution need the permission of the author.
-
- No guarantee of any kind is made that this program is 100% reliable.
- You use it on your own risk.
-
- Notes:
- ------
-
- This package contains a file system handler similar to Kristian Nielsen's
- XFH. Due to the similarities only the differences to XFH will be stated
- here. For a detailed description of the basics consult the XFH.doc.
-
- The xpk-handler needs arp.library v39+ in libs: to run.
-
- Complete source code for Aztec C v5.2a included.
-
- Differences to XFH:
- -------------------
-
- The xpk-handler uses another mechanism as XFH to pass the option the
- handler needs to run. Instead of external config files a special field of
- the mountlist entry is used (heavy magic). This field (Startup) contains
- an argument string as ONE WORD with all necessary data the handler needs
- to know at startup time. All spaces MUST be represented by an underscore
- due to the limitations of the mount comand. To insert an underscore as
- normal character in the parameter string you have to use two underscores.
- This command line will be parsed according to the following standard
- AmigaDOS template:
-
- ROOTDIR/A,VOLUMENAME/K,AUTOCOMPRESS/S,STEPDOWN/S,XPKPRIORITY/K,
- PACKMETHOD/K,PASSWORD/K
-
- The available options are detailed below:
-
- Option ROOTDIR:
- This option is used to set the path to the root directory for the
- handler. For example `ROOTDIR_"ram:"' will cause the handler to use
- the ram disk as root directory.
-
- Option VOLUMENAME:
- This option is used to set the volume name for the handler. This
- name will be shown by the AmigaDOS command Info and the workbench
- uses it for the handler's icon. For example `VOLUMENAME_"Xpk_Test"'
- causes the volume `Xpk Test:' to appear.
- Default: `Xpk handler'
-
- Option AUTOCOMPRESS:
- This option enables the handler to compress files written through it.
- Default: turned off
-
- Option STEPDOWN:
- This option enables XPK to reduce the pack efficieny if necessary to
- save memory.
- Default: turned off
-
- Option XPKPRIORITY:
- This option is used to set the task priority the handler should use
- when doing XPK operations (pack, unpack, ...).
- Default: 0
-
- Option PACKMETHOD:
- This option is used to select the mode XPK should use for compressing
- files. For example `PACKMETHOD_"BLZW.12"'will cause the handler to
- use 12-bit BLZW compression.
- Default: `NUKE'
-
- Option PASSWORD:
- This option is used to set the password that the handler should pass
- to XPK when compressing or decompressing. For example
- `PASSWORD_"Magic_word"' will cause the handler to use the password
- `Magic word'.
- Default: none
-
- So the startup field could looks like:
-
- Startup = ROOTDIR_"ram:"_VOLUMENAME_"Xpk_Test"_AUTOCOMPRESS_PACKMETHOD_"NUKE"
-
- In the `c' subdirectory a small tool called `kill' can be found to remove
- the handler from within memory and unlink the device node from AmigaDOS
- device list.
-
- Syntax: kill <device name>
- Example: kill xpk:
-
- Caveats:
- --------
-
- Due to the (mis)usage of the startup field some tools, eg. DiskX or
- DosList, misinterprets this as a pointer to an FileSysStartupMsg structure.
- So an invalid device name, unit number and environment vector will be used.
-
- Author:
- -------
-
- Torsten Jürgeleit
- Am Sandberg 4
- W-5270 Gummersbach
- Germany
-
- Phone: ++49 2261 27400
-
- eMail: bj030@aix370.rrz.uni-koeln.de (Fast, but matter of change)
- mike@miba.obb.sub.org (Slow and unsafe)
-
- Bug reports, flames, donations etc. are welcome !
-
- History:
- --------
-
- v1.0 - first public release
-