how to implement piping between different processes in Linux

Xianli · 05-11-2008, 11:59 PM

I have been trying to implement pipes under Linux where the pipelines are set in a ring.(from process A to process B to process C and back to process A)
A should take a string argument of the form(2 + 3) and sends the data down to a pipe to B.
B should calculate the result and send the result to a C(a python process)
C should pipe "The answer is xxx" to A, which will then output it to the std output.
Please help.
Thx

gilead · 05-12-2008, 12:13 AM

How far have you been able to get so far? Can you clarify whether this is a home work question?

Also, please don't double-post.

archtoad6 · 05-16-2008, 09:51 AM

The closed duplicate is here.

There was 1 response with help before it was closed:

Quote:

Originally Posted by Hko

See paragraph 5.4 of this PDF.

Be warned however, the PDF requires major horizontal scrolling to read & is therefore almost not worth looking at. Does anyone know a (preferably KDE) app. that can easily edit this to a more readable format?

Meanwhile I sent an e-mail of complaint to webmaster@codesourcery.com & composed a new original aphorism-riddle:

Quote:

What is the difference between Thomas à Becket & horizontal scrolling? . . .

Becket was a pain in the Royal Arse, horizontal scrolling is a Royal pain in the arse.

-- archtoad6 aka Rick Archibald (c) 2008, use only with attribution