Re: run TreeTagger in Windows

Does the supplier claim their package is portable?
How is it calling mkfifo? If through system you could get an mkfifo from Here (haven't tried that myself). It then depends on how it is using the 'fifo'. On UNIX a fifo is accessed using the ordinary file access commands, opened, read and written just as if it was a regular file (seek won't work though). On Windows there is a client-server model - for the server almost everything is different to UNIX (probably why POSIX::mkfifo is not implemented on Windows). The client can access the pipe as normal - except it actually does a Windows login. On Windows Named pipes are kernel objects - they do not persist after a reboot and they do not exist on a filesystem. On UNIX named pipes have an inode and survive a reboot (not that you ever need to reboot a UNIX machine you understand).

Some other IPC method needs to be used. Can we see how the fifo is being used?
Update: Looking at the source for Alvis::TreeTagger it appears to be UNIX specific - it has hard-coded UNIX style path names in. I don't know TreeTagger, but looking at the .pm code it looks like it just redirects stdin and stdout to named pipes. So (unless I'm missing something) you should be able to drive it using ordinary anonymous pipes, see perlipc.

Comment on Re: run TreeTagger in Windows

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Re^2: run TreeTagger in Windows by lilli (Initiate) on Mar 03, 2009 at 13:45 UTC
Hi, thank you for the reply. I'm trying to use the same thing that I found at perlipc. `if (system('mkfifo',"$FIFO.in")\|\|system('mkfifo',"$FIFO.out") ) { print STDERR "Cannot create pipes $FIFO.in or $FIFO.in\n"; exit(1); }` [download] This requires that the 'mkfifo' is there somehow. When I try to run the code I get the following error message: `" 'mkfifo' is not recognized as an internal or external command, operable program or batch file. Cannot create pipes /tmp/treetagger_2216.in or ..."` From the perlipc I cannot get any clues for how to solve this. It might be that I just don't understands... Any further ideas? bests, -lilli.	[reply] [d/l] [select]
Re^3: run TreeTagger in Windows by BrowserUk (Patriarch) on Mar 03, 2009 at 14:21 UTC
`mkfifo` is a unix command that is not supported under windows. There is no directly equivalent command, nor any simple way of emulating it. Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error. "Science is about questioning the status quo. Questioning authority". In the absence of evidence, opinion is indistinguishable from prejudice. "Too many [] have been sedated by an oppressive environment of political correctness and risk aversion."	[reply] [d/l]
Re^4: run TreeTagger in Windows by lilli (Initiate) on Mar 03, 2009 at 14:40 UTC
I'm using Perl Power Tools (aka the Unix Reconstruction Project) from the ppt-0.14 package which is there to implement the unix commands in perl. And if I understand it right, it should be working on all types of OP's. But when running it I get the following error: `POSIX::mkfifo not implemented on this architecture at C:\Perl\site....`. Any ideas? Bests, -lilli.	[reply] [d/l]
Re^5: run TreeTagger in Windows by BrowserUk (Patriarch) on Mar 03, 2009 at 14:52 UTC
Re^6: run TreeTagger in Windows by lilli (Initiate) on Mar 03, 2009 at 15:02 UTC
Re^5: run TreeTagger in Windows by Anonymous Monk on Mar 03, 2009 at 14:52 UTC
Re^4: run TreeTagger in Windows by ikegami (Patriarch) on Mar 03, 2009 at 15:18 UTC
Windows supports named pipes. They even exist on the file system. I think they are constrained to a pseudo volume, but that probably not an issue in this case. It sounds like a solution could be obtained which wouldn't involve changing the child.	[reply]
Re^5: run TreeTagger in Windows by BrowserUk (Patriarch) on Mar 03, 2009 at 15:35 UTC
Re^6: run TreeTagger in Windows by ikegami (Patriarch) on Mar 03, 2009 at 17:13 UTC
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Re^5: run TreeTagger in Windows by lilli (Initiate) on Mar 03, 2009 at 15:25 UTC
Re^6: run TreeTagger in Windows by ikegami (Patriarch) on Mar 03, 2009 at 15:30 UTC
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Re^3: run TreeTagger in Windows by cdarke (Prior) on Mar 03, 2009 at 15:16 UTC
Did you download mkfifo from the GNU site? Can you drive it from the Windows command-line? I suggest you take a look at the Avis::TreeTagger module code - it does nothing more than run the TreeTagger program attached to named pipes. I would not use it on Windows because it uses UNIX hard-coded path names and fork/exec. In theory all you have to do is run the TreeTagger program only use IPC::Open2 instead. You will then have two file handles to anonymous pipes instead of named pipes.	[reply]