Re: [Gawkextlib-users] Bug: Cannot use "Two-Way Communications with Another Process" when loading xml extension

[Andrew J. S. <as...@te...>]

Hi,

This is not a bug. Please set XMLMODE=0 and see that it works.
Without that, it is trying to parse the output from sort as XML
data.

Regards,
Andy

On Thu, Aug 17, 2023 at 09:23:57PM +0200, Jürgen Kahrs via Gawkextlib-users wrote:
> Hello,
> 
> the following posting looks like a reasonable question to our list.
> For some unknown reason it was auto-discarded by the mail server.
> Therefore I am re-posting it myself with a copy going to the author.
> 
> The origin of the problem probably is that the loading of the XML extension
> switches the behaviour of the interpreter when processing two-way I/O.
> To the best of my knowledge, this is intended and documented somewhere.
> 
> Jürgen Kahrs
> 
> 
>     Hi everyone,
> 
>     I'm a huge fan of the xml Extension for gawk. Great stuff!
>     Recently I noticed that I cannot open another process within gawk when the
>     xml extension is loaded (Two-way I/O (The GNU Awk User’s Guide)
> 
>     Simple script to reproduce (I basically took the example from the man
>     page):
> 
>     Does not work:
> 
>     @load "xml"
>     BEGIN {
>         command = "LC_ALL=C sort"
>         n = split("abc", a, "")
> 
>         for (i = n; i > 0; i--)
>           print a[i] |& command
>         close(command, "to")
> 
>         while ((command |& getline line) > 0)
>             print "got", line
>         close(command)
>     }
> 
>     Works (notice the "@load" Statement is commented)
> 
>     #@load "xml"
>     BEGIN {
>         command = "LC_ALL=C sort"
>         n = split("abc", a, "")
> 
>         for (i = n; i > 0; i--)
>           print a[i] |& command
>         close(command, "to")
> 
>         while ((command |& getline line) > 0)
>             print "got", line
>         close(command)
>     }
> 
>     Interestingly enough if I load other extensions (e.g @load "json") it is no
>     problem.
>     It seems to be an issue specifically with xml.
> 
>     Am I doing something wrong here? Can anyone confirm?
>     Maybe this was already reported
> 
>     Versions I used:
>       □ GNU Awk 5.2.2
>       □ XML: 1.1.1
>     Greetings
>     Joseph
> 
> 
> 
> 


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