Re: Parsing from another program (stream)

It's hard to understand from all this code what your problem is. I'd say open $fh, '-|', $prog should do.

and if MODE is -|, the filename is interpreted as a command that pipes output to us.

Furthermore you have to read line by line (not "slurp") till you either get the desired EOF or you decide to close the $fh.

But first things first

what is Print , is that a typo of print ?
what do you do about the error message No such file or directory at /home/jj/eclipse-workspace/ReadGas/ReadFromRadio.pl line 50.

Cheers Rolf
_{(addicted to the Perl Programming Language :)

Wikisyntax for the Monastery}

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Re^2: Parsing from another program (stream) by HiredGunTech (Initiate) on Feb 27, 2022 at 21:34 UTC
LanX - yep, 'Print' is 'print'. I pulled it off to format and some MS-auto-corruptor pretty-print capitalized start words. (file-not-found) I could quiet that with a chdir, sometimes. - I tried pointing to the full path, that didn't work. The file is there, but various implementations of 'open' throw that. I see a fair number of other folks fighting that. But I think 'open' is the wrong tool anyway. As for 'slurp', not the best term, I get it. The issue I have is there will NEVER be an EOF. I am reading gas usage as reported by the meter. And I can't close the file, either. So, is there no other way to parse the output of another application as it is presented??	[reply]
Re^3: Parsing from another program (stream) by LanX (Saint) on Feb 27, 2022 at 21:43 UTC
> But I think `open` is the wrong tool anyway. I used this approach in the past with great success! 🤷🏽 Maybe try providing an absolute path to the executable. edit > The issue I have is there will NEVER be an EOF. I expect that you get an EOF at least when the process exits or dies. And this case should be covered IMHO. Cheers Rolf _{(addicted to the Perl Programming Language :) Wikisyntax for the Monastery}	[reply] [d/l]