11.IPC Mechanism.FIFOs

spatlou

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niranjan

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

Thanks

Niranjan

rahul

What is difference between

rm my_fifo and unlink my_fifo

both remove fifo from file system.

ritde1

By using rm it might be possible to recover the file by recovery techniques, but not when using unlink.

vishalsarfabad

if we not closing file descriptor then it is automatically destroy the fifo it is correct. And how many file we have to made to make fifo and write and read it and how to make code for all of this .

preetamverma9076

Difference between Pipe and Fifo

gaurav133232

Firstly, FIFO is visible to us while pipe is not visible.
FIFO is a named pipe.
FIFO has options like block on read and block on write which pipe doesn't have.

11.IPC Mechanism.FIFOs

Difference between Pipe and Fifo

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