Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.os.os2.programmer.misc > #1311

Re: Creating a printer port, help needed

Show all headers | View raw

On Fri, 4 Feb 2011 09:13:19 UTC, "Lars Erdmann" <lars.erdmann@arcor.de> wrote:

> >> See other post. Use PrfReset to have the profile reread:
> >> http://www.edm2.com/os2api/Prf/PrfReset.html
> >
> > Interesting.  The warnings in EDM sound a bit dire, though.  Does PM
> > really call this when you create a new port through the UI?
> 
> I don't understand your question. The way it works is this:
> Your code mucks around with OS2.INI, OS2SYS.INI.
> When you are done and you call PrfReset, this will trigger the
> posting of a PL_ALTERED message (that's why you need a
> message queue when you use PrfReset).
> This message will go to all open applications, including the
> graphical instance of PMSHELL.EXE.

Well, my question was really "are you sure this the correct procedure 
to follow whenever you update OS2.INI?"  It seems rather like overkill.
What bothers me is (a) the function description implies that it's really
not intended for this purpose, but is designed to CHANGE the current
INI files to totally different ones, and (b) this warning from the EDM2
article you linked, which alarms me slightly:

   ... it has been my experience that the WorkPlace Shell crashes (this 
   is with Warp without Windows and no fixpak, though.) sometimes when 
   it recieves the PL_ALTERED message. I've also run out of stack space
   in this call (although this could be a symptom of the WPS, and not
   the code). So, to be safe, don't shirk on the stack space. If the WPS 
   crashes, after the standard error message, it will reload without a 
   need to reboot. Fourth, you can SEVERELY frighten the unsuspecting 
   user when all his icons either change or vanish due to this API. Be 
   careful in how you use it, or you might have people reboot/format/ 
   reinstall from scratch if they don't know what's going on. 

Since I'm not generally used to the WPS crashing when I add a new 
printer port through the GUI, it makes me wonder if the GUI isn't 
using some different method to update the INI information.


> At least, let's hope it works that way. As always with OS/2 trial and 
> error is your friend ...

That's certainly true. :)


-- 
Alex Taylor
Fukushima, Japan
http://www.socis.ca/~ataylo00

Please take off hat when replying.

Back to comp.os.os2.programmer.misc | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Creating a printer port, help needed "Alex Taylor" <mail.me@reply.to.address> - 2011-02-01 04:06 -0600
  Re: Creating a printer port, help needed "Lars Erdmann" <lars.erdmann@arcor.de> - 2011-02-04 10:13 +0100
    Re: Creating a printer port, help needed Lars Erdmann <lars.erdmann@arcor.de> - 2011-02-07 21:50 +0100
      Re: Creating a printer port, help needed "Alex Taylor" <mail.me@reply.to.address> - 2011-02-09 08:45 -0600
      Re: Creating a printer port, help needed Lars Erdmann <lars.erdmann@arcor.de> - 2011-02-07 21:56 +0100
    Re: Creating a printer port, help needed "Alex Taylor" <mail.me@reply.to.address> - 2011-02-04 05:28 -0600
  Re: Creating a printer port, help needed Lars Erdmann <lars.erdmann@arcor.de> - 2011-02-03 04:56 +0100
    Re: Creating a printer port, help needed "Lars Erdmann" <lars.erdmann@arcor.de> - 2011-02-04 10:14 +0100
    Re: Creating a printer port, help needed "Alex Taylor" <mail.me@reply.to.address> - 2011-02-03 05:27 -0600
  Re: Creating a printer port, help needed "Alex Taylor" <mail.me@reply.to.address> - 2011-02-03 05:34 -0600
  Re: Creating a printer port, help needed "Ruediger Ihle" <NOSPAM$R.Ihle@S-t.De> - 2011-02-03 16:43 +0000
    Re: Creating a printer port, help needed "Alex Taylor" <mail.me@reply.to.address> - 2011-02-11 01:00 -0600
  Re: Creating a printer port, help needed Lars Erdmann <lars.erdmann@arcor.de> - 2011-02-08 00:44 +0100
    Re: Creating a printer port, help needed "A.D. Fundum" <what.ever@neverm.ind> - 2011-02-13 18:52 +0100
  Re: Creating a printer port, help needed Lars Erdmann <lars.erdmann@arcor.de> - 2011-02-09 00:55 +0100
  Re: Creating a printer port, help needed "A.D. Fundum" <what.ever@neverm.ind> - 2011-02-02 18:55 +0100
  Re: Creating a printer port, help needed "Alex Taylor" <mail.me@reply.to.address> - 2011-02-02 08:07 -0600
    Re: Creating a printer port, help needed Lars Erdmann <lars.erdmann@arcor.de> - 2011-02-03 05:02 +0100
      Re: Creating a printer port, help needed Lars Erdmann <lars.erdmann@arcor.de> - 2011-02-03 05:07 +0100

csiph-web