Re: re-launch piped external program
- From: xhoster@xxxxxxxxx
- Date: 24 Sep 2007 19:06:31 GMT
rihad <rihad@xxxxxxx> wrote:
How can I *easily* run an external program, writing commands to it on
a filehandle, and reading its replies from another?
That is kind of like asking "How can I easily solve the 3 body problem
of classical gravitational mechanics". You can't, in general. In this
case, that is because it depends on the details of how the external command
does its buffering, and whether it produces anything on stderr, and other
things. If all ducks line up in a row properly, then it might be easy, but
unless you know what "properly" means, which itself is not easy, then you
won't know if it is easy or not.
Ironically,
reading Perl FAQ [*] left one question unanswered: where's chat2.pl so
much talked about?
http://search.cpan.org/src/ANDYD/perl5.003_07/lib/chat2.pl
I'm asking someone to give a modern (v5.8.8)
example.
Since the v5.8.8 doesn't talk about chat2, you shouldn't expect
to find a 5.8.8 example of chat2.pl.
[*] http://www.faqs.org/faqs/perl-faq/part5/
That is very very old FAQ.
Xho
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