how to programm in c Linux for Communication between processes by named pipe

Question

0.00/5 (No votes)

See more:

i have a project which i dnt have any information on it but i have to write this ... so many thanks if u help here to describe me what to do exactly ... thanks

4 program which name is P1,P2,P3,P4 write ( each program create a process in OS) and for communicate between them use 3 pipe in Named Pipe type which names are Pipe1 , Pipe2 , Pipe3 ... process1 must read a line from a file by name "input.in" in /home directory then through pipe1 give it to second process ... and second process must convert '*' to '.' and '.' to '*' then send result to third process by pipe3 ... and third process should convert small letters to big letters and inverse then through Pipe3 must sent the result to 4th process .... and at last 4th process save the result into an output file which name is "Output.out" ....

Posted 1-Dec-12 6:51am

lida zar

Add a Solution

Comments

lida zar 1-Dec-12 13:12pm

please someone help me to write this program :(

Nelek 1-Dec-12 13:52pm

You should carefully read this:
what have you tried?[^]
and
Homework[^]

We have already helped you in other questions, but this is not how it works. At least show us, that you are trying.
You just post the requirements of the excercise and then start adding comments every 10 minutes. If you nerve the people who should help you, then you are not going to get any help.
People is here without being payed, in their free time after a hard day at work. So please don't flip out if you don't get any answer in the following 10 minutes. Users are all around the world, and the one wanting to help you maybe is sleeping at this moment.

lida zar 1-Dec-12 14:04pm

ok thanks for ur advice ... now i need to know how to read a line from .in file ...? and me trying for this website ... i don't know it can help me or not

http://www.cs.utah.edu/~germain/PPS/Topics/C_Language/file_IO.html

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Thomas Daniels · Answer 1 · 2012-12-01T06:53:00

Solution 1

Hi,

Have a look here:
http://www.cs.fredonia.edu/zubairi/s2k2/csit431/more_pipes.html[^]

Posted 1-Dec-12 6:53am

Thomas Daniels

Comments

lida zar 1-Dec-12 13:04pm

thanks but its about only named pipe... first i need to create a process ... right? how its possible?

lida zar 1-Dec-12 13:23pm

how to program this then ?

Thomas Daniels 1-Dec-12 13:25pm

I don't do all work.
I post a link to the pipes, because in the title I read the word "pipes", so I think that's the most important.