Re: POE::Wheel::Run & Tk Problems

The last time I looked (which I admit is forever ago), "dir" was not a program in Windows (or DOS before it). Rather, it's a built-in shell command. You should try some actual program that will emit console output, but to be honest I don't know one off the top of my head.

Alternatively, I'm pretty sure CMD.EXE (your shell) has some options to execute built-in commands. I just don't know what they are these days.

It may also be worth testing whether you can execute batch files without starting a new shell.

Of course, it may be something completely different, but that's where I'd start.

-- Rocco Caputo - http://poe.perl.org/

Comment on Re: POE::Wheel::Run & Tk Problems

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Re^2: POE::Wheel::Run & Tk Problems by Khen1950fx (Canon) on Aug 05, 2009 at 06:25 UTC
Your post piqued my curiosity. I haven't used Windows in 10 years, so I thought I'd do a little review. I started with the dir command. Evidently, DOS does have a dir command. You can see it's documentation for 95, 98, ME here. Linux has a dir command also, but I'm not sure if all distros have it. The dir command appears to be just like ls, and it's written by the authors of ls, Richard Stallman and David MacKenzie. Update: It works on Vista too.	[reply]
Re^3: POE::Wheel::Run & Tk Problems by rcaputo (Chaplain) on Aug 05, 2009 at 06:49 UTC
Well, sure. It would be silly for an operating system to be unable to list directory contents. CMD.EXE has a built-in "dir" command, but there is no actual DIR.EXE or DIR.COM program in the version I just checked. Nevertheless, system() seems able to execute shell built-ins on Windows: `C:\>perl -wle "system('set')" ALLUSERSPROFILE=C:\Documents and Settings\All Users` [download] Whereas this sort of thing fails in UNIX: `% perl -wle 'system "set"' Can't exec "set": No such file or directory at -e line 1.` [download] `-- Rocco Caputo - http://poe.perl.org/ - irc://irc.perl.org/poe`	[reply] [d/l] [select]
Re^2: POE::Wheel::Run & Tk Problems by Anonymous Monk on Aug 05, 2009 at 06:30 UTC
The program works for me (activeperl 5.8.9, winxp), in that it starts, pops up a window, and console shows dir output, then after `pid -1492 closed all pipes.`, it segfaults.	[reply] [d/l]
Re^3: POE::Wheel::Run & Tk Problems by Khen1950fx (Canon) on Aug 05, 2009 at 06:35 UTC
If I remember correctly, you may have to invoke the "Program Compatibilty Advisor" on XP and Vista. Try that.	[reply]
Re^4: POE::Wheel::Run & Tk Problems by Anonymous Monk on Aug 05, 2009 at 07:07 UTC
If I remember correctly, you may have to invoke the "Program Compatibilty Advisor" on XP and Vista. Try that. Um, no, you're completely off base here :)	[reply]
Re^3: POE::Wheel::Run & Tk Problems by cmv (Chaplain) on Aug 05, 2009 at 13:42 UTC
Thank you for this feedback. When I run it, I don't see the dir output on the console (like I do when the `use Tk` is commented out). This may point to a version problem. I'm on winxp activeperl 5.8.9 build 825 (288577), using POE 1.006 and POE::Wheel::Run 0.16. I may try upgrading to POE 1.007 and see if that helps.	[reply] [d/l]


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