Hi All,

I am facing a vague issue while trying to make two process talk to each
other using named pipe.

read process
=========
The process which reads, basically creates FIFO using
mkfifo - ret_val = mkfifo(HALF_DUPLEX, 0666) func.

It then opens the pipe using open func - fd = open (HALF_DUPLEX,O_RDONLY);

After this read function is called - numread = read(fd, test_data, MAX_BUF_SIZE);

Write process
==========
This opens pipe fd = open(HALF_DUPLEX, O_WRONLY);

Then write is done to the pipe - write (fd, 1, 1);

I am finding that even though i am writing a value of 1, it gets
reflected as 255 by read process.

One thing I noticed is that the file descriptor returned for read process
and write process are both different as can be seen by the
program output below

read process - @ 0 NS Created pipe successfully fd = 6
read process - Read fd = 6

write process - Opened pipe for writing only .. fd = 3
write process - New request with data rqst = 1 fd = 3

read process - Received data from test .. ff

Could you please help ..

cut the code too a minimum and post.

have you tried cat'ing the fifo while the writer is working?
or echo'ing to it while the reader runs?

write (fd, 1, 1)

You might want to review the man page on "write".