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- TaskEnsure v0.00
- © Ben Summers 1993
-
-
- TaskEnsure will only work properly under RISC OS 3.
-
-
- What?
- ~~~~~
- I'm sure you will all realise how useful the RMensure command is when you
- want to load a module, but only if it's not already loaded. The TaskEnsure
- utility allows you to do the same with a WIMP task.
-
- I've set up my computer using various desktop boot files to set up an
- environment for various tasks, for example loading printer drivers,
- Impression and Draw and opening a few directories for document processing.
-
- Now, using this utility, I can check to see if an application is already
- present before loading it so I don't get multiple copies of applications if
- I run the desktop boot file again, or want to run another one for doing two
- or more things at once.
-
- This utility will only work under RISC OS 3. Under OS2, it'll assume that
- the task is not present. This is because it uses calls new to OS3.
-
-
- How?
- ~~~~
- You have a choice on how to use TaskEnsure. Firstly, you could copy the
- TaskEnsure file into your Library directory, or you could load the
- TaskEnsurM module. The first option is probably best for hard disc users.
- I've provided it as a module and an executable file so that you can make the
- choice.
-
- Either way, the effect will be to add another *command to the vast
- repertoire your computer already has. The syntax is
-
- TaskEnsure [-p] <task name> <*command>
-
- The task name is the name of the task to check for. Matching is case
- sensitive. If the task name includes spaces, enclose the task name in "s.
-
- If the task is not present, the *command is executed. This may include
- spaces without quotes... simply, the rest of the line is sent to the CLI.
-
- If the -p options is included (it's position is important), the sense of the
- command is reversed, and the command is executed if the task IS present. I
- wish RMensure had this facility!
-
-
- Examples
- ~~~~~~~~
- To load Draw it it's not already present.
-
- TaskEnsure Draw Filer_Run resources:$.Apps.!Draw
-
-
- To load a printer driver if draw is present.
-
- TaskEnsure -p Draw TaskEnsure "Printer Manager" Filer_Run ADFS::Ben.$
- .Document.Printers.!Printers
-
- note: this command should be all on one line.
-
- This last example illustrates three points. Firstly that the -p option is
- actually useful, and secondly the 'double' TaskEnsure command. The first
- TaskEnsure sees if Draw is present, the second only loads Printers is it is
- not already loaded. Thirdly, the task name of Printers has a space in it and
- so is enclosed in quotes.
-
-
- Source code
- ~~~~~~~~~~~
- The source code of TaskEnsure is included in this distribution. TaskEnsure
- is written in ARM code, and is assembled by the Acorn Assembler (not the
- BASIC one).
-
- Please do not distribute modified versions of this source code.
-
-
- Distribution
- ~~~~~~~~~~~~
- I retain copyright on all executable code, source code and documentation.
- However, you may distribute it free of charge as long as it is UNMODIFIED.
- Reasonable charges for media and distribution are acceptable.
-
-
- The author
- ~~~~~~~~~~
- TaskEnsure was written by Ben Summers. You can contact me at the address
- below. Enclose an SAE if you want a reply.
-
- If you send a disc, I'll copy the latest versions of all my PD programs onto
- it before sending it back.
-
- Ben Summers
- 1 St Clements Hill
- Norwich
- NR3 4DE
-
- email: bsummers@cix.compulink.co.uk
-
-
-
- Use and enjoy!
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