11.IPC Mechanism.FIFOs

I have implemented server client request & response handle using IPC FIFO mechanism.

Server reads requested client data on server fifo( fds) & write response data on respective client fifo.

Client have request & response once & close app. Observation as Below-

1. run server & all 4 client app

2.client send 268 byte on server fifo write fds. It means that all client write byte = 4* 268 = 1072 byte

3. server reads 1st time -

  

  -server  4 times read 268 byte & processed request & send/write on respective client fifo

   - and again read 268 byte but this time client pid =0 & try to open this client fifo in WR | NONBLOCK mode

  - so this client fifo is not present then error- open: No such file or directory and close server app

4. I also try find out server fifo current/End position using lseek but response always -1

 5. how to update current fifo position read/write?

6. All client response read expected data & close client app

Please suggest

Niranjan