home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Amiga Plus Special 6
/
Sonderheft_6-96.iso
/
pd
/
libraries
/
wbstart
/
wbstart.txt
< prev
next >
Wrap
Text File
|
1996-11-03
|
9KB
|
240 lines
Documentation for WBStart V2.2 18-Sep-1996
Permission is granted to make and distribute verbatim copies of this
manual provided the copyright notice and this permission notice are
preserved on all copies.
COPYRIGHT
Copyright (C) 1991-96 Stefan Becker
No program, document, data file or source code from this software
package, neither in whole nor in part, may be included or used in other
software packages unless it is authorized by a written permission from
the author.
NO WARRANTY
There is no warranty for this software package. Although the author
has tried to prevent errors he can't guarantee that the software package
described in this document is 100% reliable. You are therefore using this
material at your own risk. The author cannot be made responsible for any
damage which is caused by using this software package.
DISTRIBUTION
This software package is freely distributable. It may be transfered to
any media which is used for the distribution of free software like Public
Domain disk collections, CDROMs, FTP servers or bulletin board systems.
In order to ensure the integrity of this software package distributors
should use the original archive file WBStart2_2.lha (file name on Aminet:
WBStart.lha). The author cannot be made responsible if this software
package has become unusable due to modifications of the archive contents
or of the archive file itself.
There is no limit on the fee taken by distributors, e.g. for the media
costs of floppy disks, streamer tapes or compact discs, or the process of
duplicating. Such limits have proven to be harmful to the idea of freely
distributable software, e.g. the software package was removed instead of
reducing the price of a floppy disk below the limit.
Although the author does not impose any limit on these fees he would
like to express his personal opinions on this matter:
* This software package should be made available to everyone free of
charge whenever this is possible.
* If you have purchased this software package under normal conditions
from a Public Domain dealer on a floppy disk and have paid more than
5DM or US $5 then you have definitely paid too much. Please don't
support this improper profit making any longer and switch to a
cheaper source as soon as possible.
USAGE RESTRICTIONS
No program, document, data file or source code from this software
package, neither in whole nor in part, may be used on any machine which
is used
* for the research, development, construction, testing or production
of weapons or other military applications. This also includes any
machine which is used in the education for any of the above
mentioned purposes.
* by people who accept, support or use violence against other people,
e.g. citizens from foreign countries.
I. What is the purpose of this software package?
================================================
WBStart is a package to emulate the Workbenchs' method of starting
programs. Emulating this method seems to be easy on the first look,
because you only have to load a program, create a process and then send a
Workbench startup message to it.
But complications arise from this startup message. It contains pointers
to memory and directory locks owned by your process and it will not be
returned until the newly created Workbench process exits. So your process
can't quit until ALL Workbench processes which have been started by your
process are finished. If you don't wait the replied messages will go into
nowhere land and the man from India will visit you.
WBStart solves this problem by using a handler process, which loads the
program, creates the process, sends the message and then waits for the
reply. You just supply all needed information like program name and
arguments in a library call. The handler copies this information so your
program can free its resources and exit.
II. Installation
================
Just copy the files libs/wbstart.library and libs/dospath.library into
your LIBS: directory.
The file WBStarter in dev/c/examples is an example program how to use the
library. It has the following syntax:
WBStarter <command> [<command> ...]
WBStarter tries to start each command as Workbench process without
parameters.
III. Caveats
============
- Use always path names in the Default Tool field in project icons. If
you use only the program name then the wbstart.library has to scan the
path list of the Workbench to locate the program. In this case the
program may not be able to locate its icon, because most programs
look only into the current directory for the icon and do not look into
PROGDIR: as a backup solution. As a result the program can't find its
tool types and might work incorrectly.
NOTE: The same problem also occurs with the Workbench.
IV. Contents of this software package
=====================================
dev/ Autodoc, FD, Assembler, C and Oberon support files for the
wbstart.library. It also contains the C source code for the
WBStarter example and the DICE link libraries.
libs/ wbstart.library and dospath.library.
Copy these files to LIBS:
src/ Source code for the wbstart.library. It has been written for
DICE 3.0 and is included for educational purposes only. Use
the command "DMake" to compile it.
WBStart.txt This documentation.
V. Credits
==========
I would like to thank:
- Allan Odgaard <Duff@DK-Online.DK> for the Assembler support files.
- Thomas Igracki <T.Igracki@bamp.berlinet.de> for the Oberon support files.
VI. History
===========
2.2 (18-Sep-1996)
- Added "Caveats" and "Credits" section.
- Added Assembler and Oberon support files.
- Clarified directory lock usage in AutoDoc entry for WBStartTagList().
- Fixed problems with softlinks and project icons introduced in 2.1.
- Now uses dospath.library for AmigaDOS path list handling.
2.1 (07-Jun-1996)
- Now handles file names correctly which contain a path part that
points to a multiple assign.
2.0 (13-Mar-1996)
- The code has been rewritten from scratch.
- The handler has been integrated into a shared library. This means
that you don't have to start the handler by hand anymore. It will be
started automagically when you try to start a WB program using a
library call. This also means an end to all these "I can't start WB
programs" error reports resulting from a missing e-Flag on the file
L:WBStart-Handler :-)
NOTE: The old interface is not supported anymore!
You have to rewrite your applications.
- Requires OS 3.0 (V39) or better.
- Now uses memory pools to reduce memory fragmenting.
- Improved WB starter code. It should be almost 100% compatible to the
real Workbench now.
NOTE: This may result in some incompatibilities to the old WBStart
package, so you might have to change some of the input
parameters, e.g. in ToolManager Exec objects.
- Fixed the problem with variables and aliases.
- Fixed the problem with project icons whose default tool had no icon.
1.4 (03-Oct-1993)
- If the handler can't duplicate the lock of an argument, it now looks
if the argument name ends with a ':'. This type of argument
specifies a device and is produced by the Workbench, e.g. if you put
an unformatted disk into a drive and use the device icon as argument
to the program SYS:System/Format.
1.3 (27-Jun-1993)
- The handler now copies the path from the WB process. This solves the
problems with programs which use WB2CLI() or similiar functions to
get the WB path list, e.g. SYS:System/CLI. My apologies to Michael
Sinz, Michael B. Smith and the GRn beta testers.
- The handler now scans the path list when it tries to load a program.
- The handler now uses NewLoadSeg() instead of LoadSeg().
- Major source cleanup.
1.2 (21-Sep-1992)
- Corrected version string.
1.1 (13-Sep-1992)
- Fixed weird return bug in WBStart.
- Fixed "Insert volume PROGDIR:..." bug.
1.0 (24-Nov-1991)
- Initial release
VI. Contact addresses
=====================
Send comments, suggestions or bug reports to:
Postal address:
Stefan Becker
Bonner Ring 68
D-50374 Erftstadt
GERMANY
EMail: stefanb@yello.ping.de
World Wide Web: http://www.ping.de/sites/yello/