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I am sorry, I meant to write PIPE_BUF instead of BUF_PIPE. and PIPE_BUF is in limits.h
Anyway, I am still not getting it. Here is all my scratch work

This is progA.c. progA gets an integer from...

Thank you for the help. But i have another issue now.

I open a FIFO to write
mkfifo ("pipe1", 0777);
int writefd = open ("pipe1", O_WRONLY);

now how do I write argv[1] to pipe1?
I did: ...

I am trying to write a shell script for Linux to print the names of all non empty pipes in the current directory?

any help

how to read and write on pipes to communicate with each other?

Thanks guys, exactly what I wanted!

Hi!
I am writing a C program that will create a child, child will create a thread and the thread will send a message to a unnamed pipe and will print the message before exiting.

here is my work:...

system is LINUX.

is there a way to use 'ps' command to get the ancestor name and pid?

I am using UNIX (putty).

I am trying to write a C program that prints its ancestor name and PID

For example:
Lets say my program name is prog1 then the output should be
prog1 with PID: 2345
bash with PID: 4567
.......