Pipe & fifo size limit

Applications Programming
1

Hi guys.

  1. how much is the size of pipe?(i mean the buffer size)
  2. is this size different in various UNIX derivations?
  3. what happens if we write to a full pipe? does it block until get some free space(the other side receive data) or returns an error?
  4. FIFO s are physical files on the system. so their size limit must be limited to the file system. am i right?
2

As you suspected, this varies. I've heard 64KB stated sometimes, but it's not especially important.

Unless you've configured it as nonblocking, it blocks.

No. Their contents aren't stored on the filesystem.

3

Thank you very much.